Academic literature on the topic 'Mechanical properties of nanomaterials'

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Journal articles on the topic "Mechanical properties of nanomaterials"

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Wilson, Runcy, George Gejo, P. G. Prajith, Mathew Simon Sanu, Anoop Chandran, and Nellipparambil Vishwambharan Unnikrishnan. "Thermo Mechanical Properties of Carbon Nanotube Composites." Diffusion Foundations 23 (August 2019): 90–103. http://dx.doi.org/10.4028/www.scientific.net/df.23.90.

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The possibility of creating polymeric nanocomposites with desired properties can be achieved by mixing it with an appropriate nanomaterial. The carbon-based nanomaterials have an excellent combination of both physical and chemical properties which create a significant interest among the researchers to prepare an industrially useful material employing carbon based nanomaterials as the filler. The thermo-mechanical properties of materials are studied to characterize their internal state and structure. In this chapter, the thermomechanical properties of polymer-CNT nanocomposites and the various factors affecting the thermomechanical properties are discussed.
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Lu, Chao, Hang Xiao, and Xi Chen. "MOFs/PVA hybrid membranes with enhanced mechanical and ion-conductive properties." e-Polymers 21, no. 1 (January 1, 2021): 160–65. http://dx.doi.org/10.1515/epoly-2021-0010.

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Abstract Nanomaterials have been treated as effective dopants for enhancing mechanical and ion-conductive properties of polymer membranes. Among various nanomaterials, metal–organic frameworks are attracting enormous attention from researchers because of their intriguing structural and functional properties. Here we report a gentle and simple synthesis method of ZIF-8 nanomaterials, which are applied as dopants for polyvinyl alcohol composite membranes. This nanomaterials display uniform size distribution and high purity through various structural investigations. The as-prepared polymer composite membranes present enhanced mechanical and ion-conductive properties compared to pristine samples. This work provides a novel ideal on the design of nanomaterial dopants for high-performance polymer membranes.
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Zhang, Peng, Lei Wang, Hua Wei, and Juan Wang. "A Critical Review on Effect of Nanomaterials on Workability and Mechanical Properties of High-Performance Concrete." Advances in Civil Engineering 2021 (March 6, 2021): 1–24. http://dx.doi.org/10.1155/2021/8827124.

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The application of nanomaterials in high-performance concrete (HPC) has been extensively studied worldwide due to their large surface areas, small particle sizes, filling effects, and macroquantum tunneling effects. The addition of nanomaterials in HPC has great contribution to enhancing the pore size of the cementitious matrix, improving the hydration of cement, and making the matrix much denser. In order to present an exhaustive insight into the feasibility of HPC reinforced with nanomaterials, the new development of HPC was summarized and the influence of different nanomaterials on the properties of HPC was reviewed based on more than 100 recent studies in this literature review. Workability, compressive strength, tensile strength, and flexural strength properties of HPC with nanomaterials were discussed in detail. In addition, nanomaterial-modified HPC was compared with the traditional concrete and obtained a lot of valuable results. The results in the present review indicate that the addition of various nanomaterials improves the mechanical properties of HPC, while reducing the workability of HPC. However, there is an optimal dosage of nanomaterial for improving the mechanical properties of HPC. Improving the properties of HPC by adding nanomaterials is expected to become a mainstream technique in the future. This literature review can provide comprehensive and systematic knowledge to researchers and engineers working on HPC and promote the application of this new HPC in modern civil engineering.
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Qu, Juntian, and Xinyu Liu. "Recent Advances on SEM-Based In Situ Multiphysical Characterization of Nanomaterials." Scanning 2021 (June 9, 2021): 1–16. http://dx.doi.org/10.1155/2021/4426254.

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Functional nanomaterials possess exceptional mechanical, electrical, and optical properties which have significantly benefited their diverse applications to a variety of scientific and engineering problems. In order to fully understand their characteristics and further guide their synthesis and device application, the multiphysical properties of these nanomaterials need to be characterized accurately and efficiently. Among various experimental tools for nanomaterial characterization, scanning electron microscopy- (SEM-) based platforms provide merits of high imaging resolution, accuracy and stability, well-controlled testing conditions, and the compatibility with other high-resolution material characterization techniques (e.g., atomic force microscopy), thus, various SEM-enabled techniques have been well developed for characterizing the multiphysical properties of nanomaterials. In this review, we summarize existing SEM-based platforms for nanomaterial multiphysical (mechanical, electrical, and electromechanical) in situ characterization, outline critical experimental challenges for nanomaterial optical characterization in SEM, and discuss potential demands of the SEM-based platforms to characterizing multiphysical properties of the nanomaterials.
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Hayashi, Takuya, Yoong Ahm Kim, Toshiaki Natsuki, and Morinobu Endo. "Mechanical Properties of Carbon Nanomaterials." ChemPhysChem 8, no. 7 (May 14, 2007): 999–1004. http://dx.doi.org/10.1002/cphc.200700077.

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Wu, Qiong, Wei-shou Miao, Yi-du Zhang, Han-jun Gao, and David Hui. "Mechanical properties of nanomaterials: A review." Nanotechnology Reviews 9, no. 1 (March 24, 2020): 259–73. http://dx.doi.org/10.1515/ntrev-2020-0021.

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AbstractAs an emerging material, nanomaterials have attracted extensive attention due to their small size, surface effect and quantum tunneling effect, as well as potential applications in traditional materials, medical devices, electronic devices, coatings and other industries. Herein, the influence of nanoparticle selection, production process, grain size, and grain boundary structures on the mechanical properties of nanomaterials is introduced. The current research progress and application range of nano-materials are presented. The unique properties of nano-materials make them superior over traditional materials. Therefore, nanomaterials will have a broader application prospect in the future. Research on nanomaterials is significant for the development and application of materials science.
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Liu, Mei, Weilin Su, Xiangzheng Qin, Kai Cheng, Wei Ding, Li Ma, Ze Cui, et al. "Mechanical/Electrical Characterization of ZnO Nanomaterial Based on AFM/Nanomanipulator Embedded in SEM." Micromachines 12, no. 3 (February 28, 2021): 248. http://dx.doi.org/10.3390/mi12030248.

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ZnO nanomaterials have been widely used in micro/nano devices and structure due to special mechanical/electrical properties, and its characterization is still deficient and challenging. In this paper, ZnO nanomaterials, including nanorod and nanowire are characterized by atomic force microscope (AFM) and nanomanipulator embedded in scanning electron microscope (SEM) respectively, which can manipulate and observe simultaneously, and is efficient and cost effective. Surface morphology and mechanical properties were observed by AFM. Results showed that the average Young’s modulus of ZnO nanorods is 1.40 MPa and the average spring rate is 0.08 N/m. Electrical properties were characterized with nanomanipulator, which showed that the ZnO nanomaterial have cut-off characteristics and good schottky contact with the tungsten probes. A two-probe strategy was proposed for piezoelectric property measurement, which is easy to operate and adaptable to multiple nanomaterials. Experiments showed maximum voltage of a single ZnO nanowire is around 0.74 mV. Experiment criteria for ZnO manipulation and characterization were also studied, such as acceleration voltage, operation duration, sample preparation. Our work provides useful references for nanomaterial characterization and also theoretical basis for nanomaterials application.
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Baimova, Yu A., R. T. Murzaev, and S. V. Dmitriev. "Mechanical properties of bulk carbon nanomaterials." Physics of the Solid State 56, no. 10 (October 2014): 2010–16. http://dx.doi.org/10.1134/s1063783414100035.

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Karaxi, Evangelia K., Irene A. Kanellopoulou, Anna Karatza, Ioannis A. Kartsonakis, and Costas A. Charitidis. "Fabrication of carbon nanotube-reinforced mortar specimens: evaluation of mechanical and pressure-sensitive properties." MATEC Web of Conferences 188 (2018): 01019. http://dx.doi.org/10.1051/matecconf/201818801019.

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Carbon-based nanomaterials are promising reinforcing elements for the development of “smart” self-sensing cementitious composites due to their exceptional mechanical and electrical properties. Significant research efforts have been committed on the synthesis of cement-based composite materials reinforced with carbonaceous nanostructures, covering every aspect of the production process (type of nanomaterial, mixing process, electrode type, measurement methods etc.). In this study, the aim is to develop a well-defined repeatable procedure for the fabrication as well as the evaluation of pressure-sensitive properties of intrinsically self-sensing cementitious composites incorporating carbon- based nanomaterials. Highly functionalized multi-walled carbon nanotubes with increased dispersibility in polar media were used in the development of advanced reinforced mortar specimens which increased their mechanical properties and provided repeatable pressure-sensitive properties.
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Parveen, Shama, Sohel Rana, and Raul Fangueiro. "A Review on Nanomaterial Dispersion, Microstructure, and Mechanical Properties of Carbon Nanotube and Nanofiber Reinforced Cementitious Composites." Journal of Nanomaterials 2013 (2013): 1–19. http://dx.doi.org/10.1155/2013/710175.

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Excellent mechanical, thermal, and electrical properties of carbon nanotubes (CNTs) and nanofibers (CNFs) have motivated the development of advanced nanocomposites with outstanding and multifunctional properties. After achieving a considerable success in utilizing these unique materials in various polymeric matrices, recently tremendous interest is also being noticed on developing CNT and CNF reinforced cement-based composites. However, the problems related to nanomaterial dispersion also exist in case of cementitious composites, impairing successful transfer of nanomaterials' properties into the composites. Performance of cementitious composites also depends on their microstructure which is again strongly influenced by the presence of nanomaterials. In this context, the present paper reports a critical review of recent literature on the various strategies for dispersing CNTs and CNFs within cementitious matrices and the microstructure and mechanical properties of resulting nanocomposites.
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Dissertations / Theses on the topic "Mechanical properties of nanomaterials"

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Ghorai, Suman. "Chemical, physical and mechanical properties of nanomaterials and its applications." Diss., University of Iowa, 2013. https://ir.uiowa.edu/etd/2501.

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The contribution of atmospheric aerosols towards radiative forcing has a very high uncertainty due to their short atmospheric lifetime. The aerosol effects are largely controlled by the density, elemental composition, and hygroscopic properties of the aerosol particles. Therefore, we have performed designed new methodology using Scanning Transmission X-ray Microscopy (STXM), Atomic force spectroscopy (AFM), micro-FTIR spectroscopy and Scanning Electron Microscopy (SEM) to quantify these important aerosol properties. Hygroscopic properties are quantified by plotting the mass of water on a single particle basis, calculated from STXM, as a function of relative humidity. Alternatively, micro-FTIR spectra have been used to study the effect of composition of aerosol particles on the hygroscopic properties of NaCl. Moreover, a unique combination of STXM and AFM has been utilized to quantify density and elemental composition of micrometer dimensional particles. This method has also been extended towards exploring mixing state of particles, consisting of heterogeneously mixed inorganic and organic compounds. In addition to these above mentioned properties, the fate of an atmospheric particle is often altered by chemical transformation and that in turn is influenced by the atmospheric RH. Therefore, we have studied an unusual keto-enol tautomerism in malonic acid particles at high RH, which is not observed in bulk. This observation could potentially be utilized to significantly improve the models to estimate Secondary Organic Aerosols (SOA). Using STXM and micro-FTIR technique, RH dependent equilibrium constant of the tautomerism reaction has been quantified as well. Organic nanocrystals capable of undergoing solid state photochemical changes in a single-crystal-to-single-crystal (SCSC) manner have been particularly important in fabricating molecular switches, data storage devices etc. Mechanical properties of these nanomaterials may control its SCSC reactivity. In addition, investigation of mechanical stiffness is important to define allowable limit of stiffness towards device application. Therefore, we studied mechanical properties of series organic nano cocrystals primarily consisting of trans-1,2-bis(4-pyridyl)ethylene and substituted resorcinol using AFM nanoindentation technique. Dependence of mechanical properties and SCSC reactivity on the resorcinol structure is also investigated as well. Moreover, photolithography on the thin film of these organic cocrystals has been performed to demonstrate its applicability as a photoresist.
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Rupasinghe, R.-A. Thilini Perera. "Probing electrical and mechanical properties of nanoscale materials using atomic force microscopy." Diss., University of Iowa, 2015. https://ir.uiowa.edu/etd/2268.

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Studying physical properties of nanoscale materials has gained a significant attention owing to their applications in the fields such as electronics, medicine, pharmaceutical industry, and materials science. However, owing to size constraints, number of techniques that measures physical properties of materials at nanoscale with a high accuracy and sensitivity is limited. In this context, development of atomic force microscopy (AFM) based techniques to measure physical properties of nanomaterials has led to significant advancements across the disciplines including chemistry, engineering, biology, material science and physics. AFM has recently been utilized in the quantification of physical-chemical properties such as electrical, mechanical, magnetic, electrochemical, binding interaction and morphology, which are enormously important in establishing structure-property relationship. The overarching objective of the investigations discussed here is to gain quantitative insights into the factors that control electrical and mechanical properties of nano-dimensional organic materials and thereby, potentially, establishing reliable structure-property relationships particularly for organic molecular solids which has not been explored enough. Such understanding is important in developing novel materials with controllable properties for molecular level device fabrication, material science applications and pharmaceutical materials with desirable mechanical stability. First, we have studied electrical properties of novel silver based organic complex in which, the directionality of coordination bonding in the context of crystal engineering has been used to achieve materials with structurally and electrically favorable arrangement of molecules for an enhanced electrical conductivity. This system have exhibited an exceptionally high conductivity compared to other silver based organic complexes available in literature. Further, an enhancement in conductivity was also observed herein, upon photodimerization and the development of such materials are important in nanoelecrtonics. Next, mechanical properties of a wide variety of nanocrystals is discussed here. In particular, an inverse correlation between the Young’s modulus and atomic/molecular polarizability has been demonstrated for members of a series of macro- and nano-dimensional organic cocrystals composed of either resorcinol (res) or 4,6-di-X-res (X = Cl, Br, I) (as the template) and trans-1,2-bis(4-pyridyl)ethylene (4,4’-bpe) where cocrystals with highly-polarizable atoms result in softer solids. Moreover, similar correlation has been observed with a series of salicylic acid based cocrystals wherein, the cocrystal former was systematically modified. In order to understand the effect of preparation method towards the mechanical properties of nanocrystalline materials, herein we have studied mechanical properties of single component and two component nanocrystals. Similar mechanical properties have been observed with crystals despite their preparation methods. Furthermore, size dependent mechanical properties of active pharmaceutical ingredient, aspirin, has also been studied here. According to results reduction in size (from millimetre to nanometer) results in crystals that are approximately four fold softer. Overall, work discussed here highlights the versatility of AFM as a reliable technique in the electrical, mechanical, and dimensional characterization of nanoscale materials with a high precision and thereby, gaining further understanding on factors that controls these processes at nanoscale.
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Weaver, Abigail. "Mechanical and electrical properties of 3D-printed acrylonitrile butadiene styrene composites reinforced with carbon nanomaterials." Thesis, Kansas State University, 2017. http://hdl.handle.net/2097/35413.

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Master of Science
Department of Mechanical and Nuclear Engineering
Gurpreet Singh
3D-printing is a popular manufacturing technique for making complex parts or small quantity batches. Currently, the applications of 3D-printing are limited by the material properties of the printed material. The processing parameters of commonly available 3D printing processes constrain the materials used to a small set of primarily plastic materials, which have relatively low strength and electrical conductivity. Adding filler materials has the potential to improve these properties and expand the applications of 3D printed material. Carbon nanomaterials show promise as filler materials due to their extremely high conductivity, strength, and surface area. In this work, Graphite, Carbon Nanotubes, and Carbon Black (CB) were mixed with raw Acrylonitrile Butadiene Styrene (ABS) pellets. The resulting mixture was extruded to form a composite filament. Tensile test specimens and electrical conductivity specimens were manufactured by Fused Deposition Method (FDM) 3D-printing using this composite filament as the feedstock material. Weight percentages of filler materials were varied from 0-20 wt% to see the effect of increasing filler loading on the composite materials. Additional tensile test specimens were fabricated and post-processed with heat and microwave irradiation in attempt to improve adhesion between layers of the 3D-printed materials. Electrical Impedance Spectroscopy tests on 15 wt% Multiwalled Carbon Nanotube (MWCNT) composite specimens showed an increase in DC electrical conductivity of over 6 orders of magnitude compared to neat ABS samples. This 15 wt% specimen had DC electrical conductivity of 8.74x10−6 S/cm, indicating semi-conducting behavior. MWCNT specimens with under 5 wt% filler loading and Graphite specimens with under 1 wt% filler loading showed strong insulating behavior similar to neat ABS. Tensile tests showed increases in tensile strength at 5 wt% CB and 0.5 wt% MWCNT. Placing the specimens in the oven at 135 °C for an hour caused increased the stiffness of the composite specimens.
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Saggar, Richa. "Processing and Properties of 1D and 2D Boron Nitride Nanomaterials Reinforced Glass Composites." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-263205.

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Glasses and ceramics offer several unique characteristics over polymers or metals. However, they suffer from a shortcoming due to their brittle nature, falling short in terms of fracture toughness and mechanical strength. The aim of this work is to reinforce borosilicate glass matrix with reinforcements to increase the fracture toughness and strength of the glass. Boron nitride nanomaterials, i.e. nanotubes and nanosheets have been used as possible reinforcements for the borosilicate glass matrix. The tasks of the thesis are many fold which include: 1. Reinforcement of commercially derived and morphologically different (bamboo like and cylinder like) boron nitride nanotubes in borosilicate glass with the concentration of 0 wt%, 2.5 wt% and 5 wt% by ball milling process. Same process was repeated with reinforcing cleaned boron nitride nanotubes (after acid purification) into the borosilicate glass with similar concentrations. 2. Production of boron nitride nanosheets using liquid exfoliation technique to produce high quality and high aspect ratio nanosheets. These boron nitride nanosheets were reinforced in the borosilicate glass matrix with concentrations of 0 wt%, 2.5 wt% and 5 wt% by ball milling process. The samples were consolidated using spark plasma sintering. These composites were studied in details in terms of material analysis like thermo-gravimetric analysis, detailed scanning electron microscopy and transmission electron microscopy for the quality of reinforcements etc.; microstructure analysis which include the detailed study of the composite powder samples, the densities of bulk composite samples etc; mechanical properties which include fracture toughness, flexural strength, micro-hardness, Young’s modulus etc. and; tribological properties like scratch resistance and wear resistance. Cleaning process of boron nitride nanotubes lead to reduction in the Fe content (present in boron nitride nanotubes during their production as a catalyst) by ~54%. This leads to an improvement of ~30% of fracture toughness measured by chevron notch technique for 5 wt% boron nitride nanotubes reinforced borosilicate glass. It also contributed to the improvement of scratch resistance by ~26% for the 5 wt% boron nitride nanotubes reinforced borosilicate glass matrix. On the other hand, boron nitride nanosheets were successfully produced using liquid exfoliation technique with average length was ~0.5 µm and thickness of the nanosheets was between 4-30 layers. It accounted to an improvement of ~45% for both fracture toughness and flexural strength by reinforcing 5 wt% of boron nitride nanosheets. The wear rates reduced by ~3 times while the coefficient of friction was reduced by ~23% for 5 wt% boron nitride nanosheets reinforcements. Resulting improvements in fracture toughness and flexural strength in the composite materials were observed due to high interfacial bonding between the boron nitride nanomaterials and borosilicate glass matrix resulting in efficient load transfer. Several toughening and strengthening mechanisms like crack bridging, crack deflection and significant pull-out were observed in the matrix. It was also observed that the 2D reinforcement served as more promising candidate for reinforcements compared to 1D reinforcements. It was due to several geometrical advantages like high surface area, rougher surface morphology, and better hindrance in two dimensions rather than just one dimension in nanotubes.
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Wang, Xudong. "Large-Scale Patterned Oxide Nanostructures: Fabrication, Characterization and Applications." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-11212005-142143/.

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Thesis (Ph. D.)--Materials Science and Engineering, Georgia Institute of Technology, 2006.
Wang, Zhong Lin, Committee Chair ; Summers, Christopher J., Committee Co-Chair ; Wong, C. P., Committee Member ; Dupuis, Russell D., Committee Member ; Wagner, Brent, Committee Member
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Salavati, Mohammad [Verfasser], Timon [Akademischer Betreuer] Rabczuk, Tom [Gutachter] Lahmer, Almeida Areias Pedro [Gutachter] Miguel, Klaus [Gutachter] Gürlebeck, Mark [Gutachter] Jentsch, and Volkmar [Gutachter] Zabel. "Multi-Scale Modeling of Mechanical and Electrochemical Properties of 1D and 2D Nanomaterials, Application in Battery Energy Storage Systems / Mohammad Salavati ; Gutachter: Tom Lahmer, Pedro Miguel Almeida Areias, Klaus Gürlebeck, Mark Jentsch, Volkmar Zabel ; Betreuer: Timon Rabczuk." Weimar : Bauhaus-Universität Weimar, 2020. http://d-nb.info/1212798716/34.

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Salavati, Mohammad [Verfasser], Timon [Akademischer Betreuer] Rabczuk, Tom [Gutachter] Lahmer, Almeida Areias Pedro Gutachter] Miguel, Klaus [Gutachter] [Gürlebeck, Mark [Gutachter] Jentsch, and Volkmar [Gutachter] Zabel. "Multi-Scale Modeling of Mechanical and Electrochemical Properties of 1D and 2D Nanomaterials, Application in Battery Energy Storage Systems / Mohammad Salavati ; Gutachter: Tom Lahmer, Pedro Miguel Almeida Areias, Klaus Gürlebeck, Mark Jentsch, Volkmar Zabel ; Betreuer: Timon Rabczuk." Weimar : Bauhaus-Universität Weimar, 2020. http://d-nb.info/1212798716/34.

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Ilyas, Muhammad. "Development of nano-graphene cementitious composites (NGCC)." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/15828.

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Ordinary Portland cement (OPC) is the main constituent of concrete works as a principal binder for aggregates and intrinsically transmits the brittleness into concrete through the formation of hydration crystals in the cement microstructure. A number of nano cementitious composites were developed in recent years to offset the brittleness with newly discovered nanomaterials and the most prevalent among those is the graphene oxide (GO). The main objective of this PhD research work is to develop nano graphene cementitious composites (NGCC) using low cost, two dimensional (2D) graphene nanoplatelets (GNPs) and one dimensional (1D) graphited carbon nanofibres (GCNFs) with unique conical surface morphology. The GNPs were sourced synthesised in an environmental friendly way via plasma exfoliation whereas, GCNFs were manufactured through catalytic vapour grown method. The project further investigated the effect of these nanomaterials in regulating the distinctive microstructure of cement matrix leading to enhance its mechanical properties. Three different types of high-performance NGCC namely NGCC-Dot, NGCC-Fnt and NGCC-CNF, are developed by activating pristine GNPs (G-Dot), functionalised GNPs (G-Fnt) and graphited nanofibers (G-CNFs) into the cement matrix respectively. It is found through various characterization and experimental techniques that both GNPs and GCNFs regulated the cement microstructure and influenced the mechanical properties of NGCC uniquely. A remarkable increase in the flexural and the tensile strength of newly developed NGCC has been achieved and that could be attributed to the formation of distinctive microstructure regulated by catalytic activation of these nanomaterials. The shape (1D, 2D) and unique morphology of these nanomaterials played a vital role in the mechanism of crystal formation to regulate the cement microstructure. Based on the observations of test results and comprehensive characterization, the possible mechanisms of crystal formation and development of distinctive microstructure of NGCC has been established which has then proceeded to the development of a physical model for NGCC development.
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Ok, Sinan. "Surface Properties Of Carbon Nanomaterials." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606671/index.pdf.

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Carbon can be in several forms. Amorphous, graphite and diamond. Fullerenes are accepted as the fourth form of solid carbon. They are basically, large carbon cage molecules. By far the most common one is C60. Nanotubes are actually longer forms of fullerenes. If a voltage is applied between two carbon rods, an arc will develop between them. If the arc is maintained in helium or argon (instead of air) clouds of black carbon powder is produced. Although many studies have been performed on cathodic deposits, (i.e. nanotubes first seen in this section) very few studies on the carbon sooth are found in the literature. Only around 10% of the black soot is fullerene, the composition of the remainder varies depending on the working conditions. But it is assumed to contain parts of various fullerene particles even higher fullerenes up to C300. This fraction is abbreviated as FES through the thesis. This work comprises the production of FES (fullerene extracted soot), soot, cathodic deposit produced under nanotube conditions and cathodic deposit produced under fullerene conditions and characterization of these in terms of their specific surface areas
pore volume distribution, porosity and as a second part, adsorption capacity of gases H2 and NH3 have been found. Both physical and chemical adsorption analyses were done using Quantichrome Autosorb 1-C surface analyzer. Obtained isotherms for nitrogen adsorption were found to be in between type II and type IV. BET surface areas for the samples of FES and soot prepared under nanotube conditions and cathodic deposit prepared under fullerene and nanotube conditions were found 240, 180, 14.6 and 29.7 m2/g of surface area respectively. Micropore volumes were calculated from Horwath - Kowazoe and Saito - Foley methods were found 0.045, 0.034, 2.38*10-3 and 1.19*10-3 cc/g respectively. Active surface areas for NH3 adsorption were found for FES, soot and Norit active carbon sample are found to be 39.2, 49.6, 32.5 m2/g at 300 C and 6.35, 14.65, 6.59 m2/g at 3000 C respectively. As a result of this work, it is concluded that although not superior to NORIT CN1 active carbon sample, FES is as active as that material and able to adsorb as much hydrogen as active carbon. This is important because FES is already a side product of the arc-evaporation fullerene production technique and has no known uses at all.
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Baimpas, Nikolaos. "'Hybrid' non-destructive imaging techniques for engineering materials applications." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:1aa00fed-34e6-4a5e-951b-c710e21ac23c.

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The combination of X-ray imaging and diffraction techniques provides a unique tool for structural and mechanical analysis of engineering components. A variety of modes can be employed in terms of the spatial resolution (length-scale), time resolution (frequency), and the nature of the physical quantity being interrogated. This thesis describes my contributions towards the development of novel X-ray “rich” imaging experimental techniques and data interpretation. The experimental findings have been validated via comparison with other experimental methods and numerical modelling. The combination of fast acquisition rate and high penetration properties of X-ray beams allows the collection of high-resolution 3-D tomographic data sets at submicron resolution during in situ deformation experiments. Digital Volume Correlation analysis tools developed in this study help understand crack propagation mechanisms in quasi-brittle materials and elasto-plastic deformation in co-sprayed composites. For the cases of crystalline specimens where the knowledge of “live” or residual elastic strain distributions is required, diffraction techniques have been advanced. Diffraction Strain Tomography (DST) allows non-destructive reconstruction of the 2-D (in-plane) variation of the out-of-plane strain component. Another diffraction modality dubbed Laue Orientation Tomography (LOT), a grain mapping approach has been proposed and developed based on the translate-rotate tomographic acquisition strategy. It allows the reconstruction of grain shape and orientation within polycrystalline samples, and provides information about intragranular lattice strain and distortion. The implications of this method have been thoroughly investigated. State-of-the-art engineering characterisation techniques evolve towards scrutinising submicron scale structural features and strain variation using the complementarity of X-ray imaging and diffraction. The first successful feasibility study is reported of in operando stress analysis in an internal combustion engine. Finally, further advancement of ‘rich’ imaging techniques is illustrated via the first successful application of Time-of-Flight Neutron Diffraction Strain (TOF-NDST) tomography for non-destructive reconstruction of the complete strain tensor using an inverse eigenstrain formulation.
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Books on the topic "Mechanical properties of nanomaterials"

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Pelleg, Joshua. Mechanical Properties of Nanomaterials. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-74652-0.

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Austria), NANOSPD2 (2002 Vienna. Nanomaterials by severe plastic deformation: Proceedings of the conference "Nanomaterials by Severe Plastic Deformation, NANOSPD2," December 9-13, 2002, Vienna Austria. Weinheim: Wiley-VCH, 2002.

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International Conference on Nanomaterials by Severe Plastic Deformation (3rd 2005 Fukuoka, Japan). Nanomaterials by severe plastic deformation: NanoSPD3 : proceedings of the 3rd International Conference on Nanomaterials by Severe Plastic Deformation held in Fukuoka, Japan on September 22-26 2005. Uetikon-Zuerich: Trans Tech Publications, 2006.

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C-MRS International Conference (2009 Suzhou, China). Nanomaterials and plastic deformation: Selected, peer reviewed papers from the Annual Meeting of Chinese Materials Research Society, Session L, 2009, 12-17 September 2009, Suzhou, China. Zurich: Trans Tech Publications, 2011.

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Sigmund, Wolfgang, Stefan Zauscher, Bharat Bhushan, Dan Luo, and Scott R. Schricker. Handbook of Nanomaterials Properties. Heidelberg: Springer Verlag, 2014.

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Bhushan, Bharat, Dan Luo, Scott R. Schricker, Wolfgang Sigmund, and Stefan Zauscher, eds. Handbook of Nanomaterials Properties. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-31107-9.

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Cabral, Vinicius. Nanomaterials: Properties, preparation and processes. New York: Nova Science Publishers, 2010.

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Kambic, HE, and AT Yokobori, eds. Biomaterials' Mechanical Properties. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1994. http://dx.doi.org/10.1520/stp1173-eb.

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C. S. S. R. Kumar. Magnetic nanomaterials. Weinheim, Germany: Wiley-VCH, 2009.

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Zhang, Jin Z. Optical properties and spectroscopy of nanomaterials. Hackensack, N.J: World Scientific, 2009.

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Book chapters on the topic "Mechanical properties of nanomaterials"

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Ramesh, K. T. "Mechanical Properties: Density and Elasticity." In Nanomaterials, 95–119. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-09783-1_4.

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Robertson, Christopher G. "Dynamic Mechanical Properties." In Encyclopedia of Polymeric Nanomaterials, 647–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-29648-2_317.

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Robertson, Christopher G. "Dynamic Mechanical Properties." In Encyclopedia of Polymeric Nanomaterials, 1–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-36199-9_317-1.

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Pelleg, Joshua. "Deformation in Nanomaterials." In Mechanical Properties of Nanomaterials, 83–180. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-74652-0_5.

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Shokoohi, Shirin, Ghasem Naderi, and Aliasghar Davoodi. "Mechanical Properties of Nanomaterials." In Nanocomposite Materials, 129–45. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315372310-7.

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Juarez-Martinez, Gabriela, Alessandro Chiolerio, Paolo Allia, Martino Poggio, Christian L. Degen, Li Zhang, Bradley J. Nelson, et al. "Mechanical Properties of Nanomaterials." In Encyclopedia of Nanotechnology, 1305. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_100389.

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Tromas, C., M. Verdier, M. Fivel, P. Aubert, S. Labdi, Z. Q. Feng, M. Zei, and P. Joli. "Mechanical and Nanomechanical Properties." In Nanomaterials and Nanochemistry, 229–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-72993-8_8.

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Cao, Changhong, Xuezhong Wu, Xiang Xi, Tobin Filleter, and Yu Sun. "Mechanical Characterization of Graphene." In Handbook of Nanomaterials Properties, 121–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-31107-9_35.

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Pelleg, Joshua. "Imperfections in Nanomaterial." In Mechanical Properties of Nanomaterials, 41–82. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-74652-0_4.

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Anderson, Peter M., John S. Carpenter, Michael D. Gram, and Lin Li. "Mechanical Properties of Nanostructured Metals." In Handbook of Nanomaterials Properties, 495–553. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-31107-9_20.

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Conference papers on the topic "Mechanical properties of nanomaterials"

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Jiao, Lihong Heidi, and Nael Barakat. "Incorporation of Hands-On Activities in Learning Nanomaterials." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62598.

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For decades, nanomaterials, especially nanoparticles, have received extensive attention from the research community and have gained increasing importance in many industries. Growing production and utilization of nanomaterials result in a significant need for a relevant and skilled workforce. To meet these growing needs, the course “Fundamentals of Nanotechnology” was developed in the School of Engineering (SOE) at Grand Valley State University (GVSU) as one part of the Nanotechnology curriculum development plan sponsored by the National Science Foundation (NSF). Nanomaterials is one of the main topics covered in this course. Many concepts related to nanomaterials are both theoretical and abstract, which are difficult for students to grasp. This paper describes the hands-on lab activities incorporated to enhance the students’ learning and mastery of the subject. Through these hands-on activities, students learned to synthesize zero-dimensional and two-dimensional nanomaterials and characterized different properties of these nanomaterials. Students explored the physical and optical properties of nanoparticles, particle-to-particle aggregation, and applications of nanoparticles as sensors used in different fields. This paper presents the role of these hands-on activities in enhancing the students’ understanding of the theoretical nanomaterial concepts. These lab activities were assessed and results of this assessment from the first offering of the course are presented.
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B. B., Badmaev, Dembelova T. S., Makarova D. N., Tsyrenzhapova A. B., and Badarkhaev B. V. "Physical-mechanical Properties of the Nanoparticle Suspension Based on Polymer Liquids." In NANOMATERIALS AND TECHNOLOGIES-VI. Buryat State University Publishing Department, 2016. http://dx.doi.org/10.18101/978-5-9793-0883-8-12-15.

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Gernand, Jeremy M., and Elizabeth A. Casman. "Selecting Nanoparticle Properties to Mitigate Risks to Workers and the Public: A Machine Learning Modeling Framework to Compare Pulmonary Toxicity Risks of Nanomaterials." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62687.

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Due to their size and unique chemical properties, nanomaterials have the potential to interact with living organisms in novel ways, leading to a spectrum of negative consequences. Though a relatively new materials science, already nanomaterial variants in the process of becoming too numerous to be screened for toxicity individually by traditional and expensive animal testing. As with conventional pollutants, the resulting backlog of untested new materials means that interim industry and regulatory risk management measures may be mismatched to the actual risk. The ability to minimize toxicity risk from a nanomaterial during the product or system design phase would simplify the risk assessment process and contribute to increased worker and consumer safety. Some attempts to address this problem have been made, primarily analyzing data from in vitro experiments, which are of limited predictive value for the effects on whole organisms. The existing data on the toxicity of inhaled nanomaterials in animal models is sparse in comparison to the number of potential factors that may contribute to or aggravate nanomaterial toxicity, limiting the power of conventional statistical analysis to detect property/toxicity relationships. This situation is exacerbated by the fact that exhaustive chemical and physical characterization of all nanomaterial attributes in these studies is rare, due to resource or equipment constraints and dissimilar investigator priorities. This paper presents risk assessment models developed through a meta-analysis of in vivo nanomaterial rodent-inhalational toxicity studies. We apply machine learning techniques including regression trees and the related ensemble method, random forests in order to determine the relative contribution of different physical and chemical attributes on observed toxicity. These methods permit the use of data records with missing information without substituting presumed values and can reveal complex data relationships even in nonlinear contexts or conditional situations. Based on this analysis, we present a predictive risk model for the severity of inhaled nanomaterial toxicity based on a given set of nanomaterial attributes. This model reveals the anticipated change in the expected toxic response to choices of nanomaterial design (such as physical dimensions or chemical makeup). This methodology is intended to aid nanomaterial designers in identifying nanomaterial attributes that contribute to toxicity, giving them the opportunity to substitute safer variants while continuing to meet functional objectives. Findings from this analysis indicate that carbon nanotube (CNT) impurities explain at most 30% of the variance pulmonary toxicity as measured by polymorphonuclear neutrophils (PMN) count. Titanium dioxide nanoparticle size and aggregation affected the observed toxic response by less than ±10%. Difference in observed effects for a group of metal oxide nanoparticle associated with differences in Gibbs Free Energy on lactate dehydrogenase (LDH) concentrations amount to only 4% to the total variance. Other chemical descriptors of metal oxides were unimportant.
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Borysiuk, V. M., and U. S. Shvets. "Atomistic simulations of the mechanical properties of Au-Ag nanorod." In 2016 International Conference on Nanomaterials: Application & Properties (NAP). IEEE, 2016. http://dx.doi.org/10.1109/nap.2016.7757230.

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Kujawski, Mark P., Leela Rakesh, Stanley Hirschi, Brad D. Falhman, Joana C. Finegan, Ekmagage Don N. Almeida, Nicole M. Bullard, Jason Hiller, Michael P. Lalko, and Jeremy V. Miller. "Steady Shear and Linear Viscoelastic Properties of Melt Mixed and Injection Molded Samples of Polypropylene, Polystyrene, and Polyethylene Nanocomposites With Carbon Black, Vapor Grown Carbon Fibers, and Carbon Nanotubes." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15814.

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Tailoring the rheological properties of polymers is important for practical applications such as the stabilization of polymer emulsions, blends, and foams. Nanomaterial (i.e. Carbon Nanotubes, Carbon Nanofibers, Dendrimers, and Carbon Black) are an excellent way to modify the mechanical, thermal, electrical, and optical properties of materials. This paper presents steady shear and linear viscoelastic oscillation testing of three polymers: Polyethylene (PE); Polypropylene (PP); and Polystyrene (PS). These polymers were studied in bulk form and as composites containing designated volume fractions of nanomaterials over a range of processing temperatures and conditions. The nanomaterials investigated in this study include Carbon Black, Vapor Grown Carbon Nanofibers, Multiwalled Carbon Nanotubes, Single Walled Carbon Nanotubes, and COOH functionalized Single Walled Carbon Nanotubes. The nanocomposite samples used for rheological experimentation were manufactured by melt mixing and injection molding. We will address whether the melt rheological measurements can unequivocally detect the co-continuous composition range in such systems. We will also investigate the melt flow rate through nanomaterial concentration variations, as well as discuss the storage modulus (G'), viscous modulus (G"), and complex viscosity of homogeneous polymer materials versus carbon nanocomposite material at various frequencies.
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Choi, Ikje, Ji Hyun Kim, and Chul-Woo Chung. "Evaluation of Mechanical Properties of Cement Composites with Nanomaterials." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.429.

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Sharma, Jyoti, Namrat Kaur, and A. K. Srivastava. "Study of mechanical properties of nanomaterials under high pressure." In ADVANCED MATERIALS AND RADIATION PHYSICS (AMRP-2015): 4th National Conference on Advanced Materials and Radiation Physics. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4929245.

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ANDRIEVSKI, R. A. "IRRADIATION EFFECT ON STRUCTURE AND MECHANICAL PROPERTIES OF NANOMATERIALS." In Proceedings of International Conference Nanomeeting – 2011. WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814343909_0060.

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Lukianova, O. A., V. V. Sirota, V. V. Krasil'nikov, and A. A. Parkhomenko. "Mechanical properties and microstructure of silicon nitride fabricated by pressureless sintering." In 2016 International Conference on Nanomaterials: Application & Properties (NAP). IEEE, 2016. http://dx.doi.org/10.1109/nap.2016.7757310.

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Smyrnova, K. V., O. V. Bondar, S. O. Borba-Pogrebnjak, Ya O. Kravchenko, V. M. Beresnev, B. Zhollybekov, and L. Baimoldanova. "The microstructure and mechanical properties of (TiAlSiY)N nanostructured coatings." In 2017 IEEE 7th International Conference "Nanomaterials: Application & Properties" (NAP). IEEE, 2017. http://dx.doi.org/10.1109/nap.2017.8190204.

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Reports on the topic "Mechanical properties of nanomaterials"

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Zhang, Mingjun. Acquisition of a Nanoindenter for Studying Mechanical Properties of Nanomaterials, Supporting Future Research in Robotics and Enhancing Research-Related Education. Fort Belvoir, VA: Defense Technical Information Center, November 2015. http://dx.doi.org/10.21236/ad1007451.

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Luecke, William E., J. David McColskey, Christopher N. McCowan, Stephen W. Banovic, Richard J. Fields, Timothy Foecke, Thomas A. Siewert, and Frank W. Gayle. Mechanical properties of structural steel. Gaithersburg, MD: National Institute of Standards and Technology, 2005. http://dx.doi.org/10.6028/nist.ncstar.1-3d.

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Solem, J. C., and J. K. Dienes. Mechanical Properties of Cellular Materials. Office of Scientific and Technical Information (OSTI), July 1999. http://dx.doi.org/10.2172/759178.

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Caskey, Jr, G. R. Mechanical Properties of Uranium Alloys. Office of Scientific and Technical Information (OSTI), October 2002. http://dx.doi.org/10.2172/804673.

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Siegel, R. W., and G. E. Fougere. Mechanical properties of nanophase materials. Office of Scientific and Technical Information (OSTI), November 1993. http://dx.doi.org/10.2172/10110297.

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Knappenberger, Jr, and Kenneth L. Magnetoplasmonic Nanomaterials: A Route to Predictive Photocatalytic, Light-Harvesting and Ferrofluidic Properties. Fort Belvoir, VA: Defense Technical Information Center, October 2013. http://dx.doi.org/10.21236/ada606151.

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Wallace, J. S., E. R. Jr Fuller, and S. W. Freiman. Mechanical properties of aluminum nitride substrates. Gaithersburg, MD: National Institute of Standards and Technology, 1996. http://dx.doi.org/10.6028/nist.ir.5903.

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McEachen, G. W. Carbon syntactic foam mechanical properties testing. Office of Scientific and Technical Information (OSTI), January 1998. http://dx.doi.org/10.2172/654103.

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Neuman, A. D., M. J. Blacic, M. Platero, R. S. Romero, K. J. McClellan, and J. J. Petrovic. Mechanical properties of melt-derived erbium oxide. Office of Scientific and Technical Information (OSTI), December 1998. http://dx.doi.org/10.2172/296753.

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Klueh, R. L., D. J. Alexander, and M. Rieth. Mechanical properties of irradiated 9Cr-2WVTa steel. Office of Scientific and Technical Information (OSTI), September 1998. http://dx.doi.org/10.2172/330624.

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