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Articoli di riviste sul tema "Nanotubes"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Hajeeassa, Khdejah S., Mahmoud A. Hussein, Yasir Anwar, Nada Y. Tashkandi, and Zahra M. Al-amshany. "Nanocomposites containing polyvinyl alcohol and reinforced carbon-based nanofiller." Nanobiomedicine 5 (January 1, 2018): 184954351879481. http://dx.doi.org/10.1177/1849543518794818.

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A new class of biologically active polymer nanocomposites based on polyvinyl alcohol and reinforced mixed graphene/carbon nanotube as carbon-based nanofillers with a general abbreviation (polyvinyl alcohol/mixed graphene–carbon nanotubes) has been successfully synthesized by an efficient solution mixing method with the help of ultrasonic radiation. Mixed graphene and carbon nanotubes ratio has been prepared (50%:50%) wt by wt. Different loading of mixed graphene–carbon nanotubes (2, 5, 10, 15, and 20 wt%) were added to the host polyvinyl alcohol polymer. In this study, polyvinyl alcohol/mixed

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2

Jin, Wei, Wen Chen, Bai Tao Dong, Chun Xia Zhao, Li Qiang Mai, and Ying Dai. "V₂O₅ Nanotubes Novel Gas Sensor with High Sensitivity for Ethanol." Key Engineering Materials 421-422 (December 2009): 328–31. http://dx.doi.org/10.4028/www.scientific.net/kem.421-422.328.

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Vanadium oxide nanotubes were synthesized via a rheological self-assembling process followed by a hydrothermal reaction. V2O5 gas sensors were fabricated from vanadium oxide nanotubess with an average diameter of around 90 nm and their gas-sensing properties were investigated. It was found that the sensors based on vanadium oxide nanotubes exhibit high responses ethanol gas at 270°C. The results indicate that vanadium oxide nanotube sensors will be promising candidates for practical detectors for ethanol.

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3

Prasad, Shiva, Harish Venkat Reddy, and Ashok Godekere. "Properties of Carbon Nanotubes and their applications in Nanotechnology – A Review." Mapana Journal of Sciences 20, no. 4 (2021): 49–64. http://dx.doi.org/10.12723/mjs.59.4.

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One of the most distinctive inventions in the world of nanotechnology is the carbon nanotube (CNT). Many scholars around the world have been studying carbon nanotubes (CNTs) over the past two decades due to their enormous potential in a variety of sectors. Single-wall CNTs with dimensions in the nanometer range are commonly referred to as carbon nanotubes. Carbon nanotubes are also known as multi-wall CNTs, which are made up of nested single-wall CNTs that are weakly bonded together in a tree ring-like structure by van der Waals interactions. Tubes having an unknown carbon wall structure and d

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4

Hou, Wenyi, and Shaoping Xiao. "Mechanical Behaviors of Carbon Nanotubes with Randomly Located Vacancy Defects." Journal of Nanoscience and Nanotechnology 7, no. 12 (2007): 4478–85. http://dx.doi.org/10.1166/jnn.2007.862.

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In this paper, 10 0 zigzag nanotubes and (6, 6) armchair nanotubes are considered to investigate the effects of randomly distributed vacancy defects on mechanical behaviors of single-walled carbon nanotubes. A spatial Poisson point process is employed to randomly locate vacancy defects on nanotubes. Atomistic simulations indicate that the presence of vacancy defects result in reducing nanotube strength but improving nanotube bending stiffness. In addition, the studies of nanotube torsion indicate that vacancy defects prevent nanotubes from being utilized as torsion springs.

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5

Lin, Tong, Vardhan Bajpai, Tao Ji, and Liming Dai. "Chemistry of Carbon Nanotubes." Australian Journal of Chemistry 56, no. 7 (2003): 635. http://dx.doi.org/10.1071/ch02254.

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Judicious application of site-selective reactions to non-aligned and aligned carbon nanotubes has opened a rich field of carbon nanotube chemistry. In order to meet specific requirements demanded by particular applications (e.g. biocompatibility for nanotube biosensors and interfacial strength for blending with polymers), chemical modification of carbon nanotubes is essential. The tips of carbon nanotubes are more reactive than their sidewalls, allowing a variety of chemical reagents to be attached at the nanotube tips. Recently, some interesting reactions have also been devised for chemical m

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6

ACAR, Muhammet Taha. "Investigation of the effects of Sr and Mn doping on corrosion tribocorrosion and cyclic voltammetry performances of TiO2 nanotubes." European Mechanical Science 7, no. 3 (2023): 138–45. http://dx.doi.org/10.26701/ems.1265161.

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In this study, manganese (Mn) and strontium (Sr) were doped into TiO2 nanotubes (TNT), which are frequently used in energy storage equipment. The aim of this study is to compare the corrosion tribocorrosion and cyclic voltammetry performances of doped TNTs after examining their structural characteristics. XRD and SEM were used to characterize the nanotubes. After the anodization processes, the inclusion of Mn and Sr in the TNT structure was confirmed by XRD analysis. In SEM analysis, it was observed that with the addition of Mn and Sr into the solution, longer nanotubes were formed with increa

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7

Syahriza Ismail, Khairil Azwa Khairul, Zainovia Lockman, and Zhwan Dilshad Ibrahim Sktani. "Mechanism of Co3O4-TiO2 Nanocomposite Formation with Enhanced Photocatalytic Performance." Journal of Advanced Research in Micro and Nano Engineering 23, no. 1 (2024): 49–60. http://dx.doi.org/10.37934/armne.23.1.4960.

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TiO2 nanotubes are tubular structures that have garnered significant attention in materials science and engineering due to their unique properties and diverse applications. In this study, highly ordered and well aligned TiO2 nanotubes were successfully synthesized through anodization of Ti foil in ethylene glycol (C2H6O2) containing ammonium fluoride (NH4F) and hydrogen peroxide (H2O2) at 60 V for 30 minutes. The effectiveness of TiO2 as a photocatalyst under solar light is limited by its wide band gap and high recombination rate of charge carriers. To address these limitations, TiO2 nanotubes

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8

Mitra, Manu. "Introduction on Carbon Nanotubes (CNT) and Its Applications in Electronic Circuits." Journal of Electronic Research and Application 2, no. 2 (2018): 5–17. https://doi.org/10.26689/jera.v2i2.339.

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Carbon Nanotubes (CNT) in nanotechnology field are legendary for its strength and chemical inertness. Technically, we can alter carbon nanotubes based on our necessities and requirements such as single layered nanotube, double layered nanotube, multi layered nanotube etc. In this paper usage of carbon nanotubes in semiconductor devices such as nanomaterials, molecular dynamics of nanomaterials, heterojunctions using carbon nanotubes, diodes and Graphene Field Effect Transistor (GFET), its characteristics and data analysis are discussed. The major application of carbon nanotubes in electronic c

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9

Le, Minh Tai, and Shyh Chour Huang. "Modeling and Analysis the Effect of Helical Carbon Nanotube Morphology on the Mechanical Properties of Nanocomposites Using Hexagonal Representative Volume Element." Applied Mechanics and Materials 577 (July 2014): 3–6. http://dx.doi.org/10.4028/www.scientific.net/amm.577.3.

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Carbon nanotubes (CNTs) are the ultimate reinforcing materials for the development of an entirely new class of composites. However, they have the complicated shapes and do not usually appear as straight reinforcements when introduced in polymer matrices. This decreases nanotube’s effectiveness in enhancing the matrix mechanical properties. In this paper, nanostructure having hexagonal representative volume element (RVE), theory of elasticity of anisotropic materials and finite element method (FEM) are used to investigate the effect of helical CNT morphology on effective mechanical properties o

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10

Jinkins, Katherine, Michael S. Arnold, and Sean Foradori. "Aligned Semiconducting Carbon Nanotubes for Commercial Logic and RF Electronics." ECS Meeting Abstracts MA2024-01, no. 15 (2024): 1177. http://dx.doi.org/10.1149/ma2024-01151177mtgabs.

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Carbon nanotubes are exceptional semiconductors that offer larger current densities and faster switching than conventional Si and GaAs devices, making nanotubes promising for meeting the performance and energy efficiency needs of next-generation electronics. However, the successful commercialization of carbon nanotubes necessitates the control over semiconducting purity, alignment, packing density, and scalability. The simultaneous control of these characteristics has been a major challenge preventing the integration of nanotubes in industrial electronics and the full exploitation of their ele

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11

Levchenko, I., K. Ostrikov, and M. Keidar. "Plasma-Assembled Carbon Nanotubes: Electric Field–Related Effects." Journal of Nanoscience and Nanotechnology 8, no. 11 (2008): 6112–22. http://dx.doi.org/10.1166/jnn.2008.sw10.

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The paper presents results of comparative investigation of carbon nanotubes growth processes in dense low-temperature plasma and on substrate surface. Hybrid/Monte-Carlo numerical simulations were used to demonstrate the differences in the ion fluxes, growth rates and kinetics of adsorbed atoms re-distribution on substrate and nanotubes surfaces. We show that the plasma parameters significantly affect the nanotubes growth kinetics. We demonstrate that the growth rates of the nanotubes in plasma and on surface can differ by three orders, and the specific fluxes to the nanotube in the plasma can

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12

Li, Yun, Nan Nan Wang, Hai Feng Cheng, Yong Jiang Zhou, and Ting Ting Li. "Microstructure Evolution of Hybrid TiO₂ Nanowire-Nanotube Structure Fabricated by Anodization." Materials Science Forum 852 (April 2016): 428–32. http://dx.doi.org/10.4028/www.scientific.net/msf.852.428.

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Hybrid TiO2 nanowire–nanotube structure was synthesized by a facile anodization on Ti substrate. To study the origin and evolution of TiO2 nanotubes, the morphology of TiO2 nanotubes was investigated. It was found that nanotubes corrode gradually into nanowires, and the critical time was about 8.5 h after the beginning of anodization. Uniform nanotubes were obtained by ultrasonic cleaning. It was demonstrated experimentally that the inner diameter of TiO2 nanotube increased with the extension of anodization time, but the outer diameter of TiO2 nanotubes, which were fabricated under different a

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13

Zhang, J. W., Zhen Luo, Y. L. Li, J. D. Zhu, and J. Hao. "A Welding Method for Carbon Nanotubes." Advanced Materials Research 160-162 (November 2010): 737–42. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.737.

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A simple and reliable welding method was developed to weld carbon nanotubes with the power supply here. The carbon nanotubes were synthesized chemical vapor deposition method and Multi-walled carbon nanotubes was uesd here. Firstly, apply less than 5 V voltages between carbon nanotubes when they were in close proximity under direct view of optical microscope. Then, let carbon nanotube contact with each other and increase the external voltage to 7–8V until carbon nanotube was attached to the end of the other, the two carbon nanotube join into a carbon nanotube. Furthermore, some experiments wer

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14

Gábor, T., D. Aranyi, Katalin Papp, F. H. Kármán, and Erika Kálmán. "Dispersibility of Carbon Nanotubes." Materials Science Forum 537-538 (February 2007): 161–68. http://dx.doi.org/10.4028/www.scientific.net/msf.537-538.161.

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Availability of a stable carbon nanotube suspension is a prerequisite for production of polymer composites with carbon nanotube as additives. In this work nanotube suspensions, which have been prepared from various nanotubes in different dispersion agents, were compared. Dispersibility of the samples was investigated by scanning electon microscopy and atomic force microscopy. Solution of a non-ionic surfactant was also used successfully as a new dispersion agent. Geometrical parameters of the carbon nanotubes were determined by using atomic force microscopy. Correlation was found between the d

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15

Yang, Seunghwa. "Understanding Covalent Grafting of Nanotubes onto Polymer Nanocomposites: Molecular Dynamics Simulation Study." Sensors 21, no. 8 (2021): 2621. http://dx.doi.org/10.3390/s21082621.

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Here, we systematically interrogate the effects of grafting single-walled (SWNT) and multi-walled carbon nanotubes (MWNT) to polymer matrices by using molecular dynamics (MD) simulations. We specifically investigate key material properties that include interfacial load transfer, alteration of nanotube properties, and dispersion of nanotubes in the polymer matrix. Simulations are conducted on a periodic unit cell model of the nanocomposite with a straight carbon nanotube and an amorphous polyethylene terephthalate (PET) matrix. For each type of nanotube, either 0%, 1.55%, or 3.1% of the carbon

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16

Liu, Yuan Chao, Ya Jie Zhang, Ya Jun Wu, and Bao Min Sun. "Carbon Nanotubes with Special Structure from the Pyrolysis Flame." Advanced Materials Research 261-263 (May 2011): 909–12. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.909.

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Carbon nanotube is the one-dimensional carbon nano-materials. The synthesis of carbon nanotubes from pyrolysis flame is a new method. Variety of carbon nanotubes with special structure can be seen from pyrolysis flame due to the influence of key factors such as the concentration of reactants and catalyst particle size. The morphology and structural of carbon nanotubes were characterized by scanning electron microscope and transmission electron microscopy respectively. Carbon nanotubes with special structure such as bamboo-like, pod-like and coil-like can be seen in the experiment. The bamboo-l

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17

Brown, Alan S. "Positive Reinforcement." Mechanical Engineering 132, no. 03 (2010): 36–39. http://dx.doi.org/10.1115/1.2010-mar-3.

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This article focuses on the future applications and challenges of nanotube-enhanced composites. In spite of their well-known strength and stiffness, nanotubes have proved incredibly difficult to harness, especially in composites. Researchers have eventually found ways to compatibilize nanotubes by attaching molecules to the nanotube surface. Some formulators compatibilize nanotubes for infusion processes, which pump resin into reinforcing fiber preforms. Electric hybrid car designer Velozzi is working with Bayer Materials Science LLC, a subsidiary of Germany’s Bayer AG, to use nanotube-based c

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18

Susi, Bryan T., and Jay F. Tu. "Digital Synthesis of Realistically Clustered Carbon Nanotubes." C 8, no. 3 (2022): 34. http://dx.doi.org/10.3390/c8030034.

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A computational approach for creating realistically structured carbon nanotubes is presented to enable more accurate and impactful multi-scale modeling and simulation techniques for nanotube research. Much of the published literature to date involving computational modeling of carbon nanotubes simplifies their structure as being long and straight, and often existing as isolated individual nanotubes. However, imagery of nanotubes has shown over several decades that nanotubes agglomerate together and exhibit looping and curvature due both to inter- and intra-nanotube attraction. The research pre

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19

ALDAJAH, S., J. CHATTERJEE, M. ALRAWADEH, A. KOSURI, and Y. HAIK. "ALIGNMENT OF CARBON NANOTUBES USING MAGNETIC NANOPARTICLES." International Journal of Nanoscience 08, no. 03 (2009): 251–59. http://dx.doi.org/10.1142/s0219581x09006067.

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Carbon nanotubes are driving scientific research nowadays. This field has several important directions in basic research, including chemistry, electronic transport, mechanical, and field emission properties. The most eye-catching features of carbon nanotubes are their electronic, mechanical, optical, and chemical characteristics, which open a way to future applications. One of the most important applications of nanotubes based on their properties will be as reinforcements in composite materials. One of the biggest concerns to nanotube industry is the alignment problem which has limited the usa

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20

Yang, Yang, Xiao Hui Wang, and Long Tu Li. "Zinc-Doped TiO₂ Nanotube Arrays." Key Engineering Materials 434-435 (March 2010): 446–47. http://dx.doi.org/10.4028/www.scientific.net/kem.434-435.446.

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Zinc-doped TiO2 nanotube arrays were fabricated by immersing TiO2 nanotube arrays in zinc-containing solution for hours. And subsequent heat-treatment was crucial for Zn2+ coming into the crystal lattice of TiO2 nanotubes. TEM analysis was used as main technique to investigate the structure of zinc-doped TiO2 nanotubes, and found that the Zn2+ ions only combine into the lattice of TiO2 nanotubes. This kind of doping can change the valence structure in the surface of TiO2 nanotube array. The obtained zinc-doped TiO2 nanotube arrays have potential application in photocatalysis.

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21

Le, D. T., E. V. Butyrskaya, and T. V. Eliseeva. "Cluster Adsorption of L-Histidine on Carbon Nanotubes in Aqueous Solutions at Different Temperatures." Russian Journal of Physical Chemistry A 96, no. 8 (2022): 1719–23. http://dx.doi.org/10.1134/s003602442208012x.

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Abstract Adsorption isotherms are obtained for L-histidine on carbon nanotubes using aqueous solutions at temperatures of 25, 35, 45, 55, 65, and 80°C. The isotherms are interpreted by using the cluster adsorption model and analyzing the dependence of the strength of the bond nanotube–amino acid on temperature. Equations of the adsorption isotherms are obtained for all temperatures. The calculated results indicate that L-histidine is fixed on a nanotube’s surface in the form of monomers and different clusters. The equilibrium characteristics of adsorption are found to change as the temperature

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22

Huseynov, Asgar, Aydin Israfilov, Samira Mammadova, et al. "Fabrication and characterization of MWCNT/natural Azerbaijani bentonite electroconductive ceramic composites." Journal of Composite Materials 53, no. 26-27 (2019): 3909–23. http://dx.doi.org/10.1177/0021998319848798.

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Multi-walled carbon nanotubes have been synthesized by Aerosol-Chemical Vapor Deposition method. Carbon nanotubes firstly have been used as filler in affordable and prevalent natural Azerbaijani bentonite clays for fabrication electroconductive ceramic composites. In this paper, multi-walled carbon nanotubes/natural Azerbaijani bentonite ceramic composites were prepared by two-factor mechanical method and followed by calcination at 1050℃ in an inert atmosphere. The ceramic composites were characterized by scanning electron microscope, atomic force microscope, X-ray diffraction and thermogravim

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Kumar, Ponnusamy Senthil, and G. Janet Joshiba. "Carbon Nanotube Composites." Diffusion Foundations 23 (August 2019): 75–81. http://dx.doi.org/10.4028/www.scientific.net/df.23.75.

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The discovery of carbon nanotubes is one of the remarkable achievement in the field of material science and it is a great advancement of Nanotechnology. A carbon nanotube is an expedient material used in several domains and paves way for the welfare of humans in many ways. Carbon nanotubes are nanosized tubes made from graphitic carbons and it is well known for its exclusive physical and chemical properties. The market demand for the nanotubes has increased progressively due to its size dependent, structure and mechanical properties. The carbon nanotubes possess high tensile strength and it is

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24

Winey, Karen I., Takashi Kashiwagi, and Minfang Mu. "Improving Electrical Conductivity and Thermal Properties of Polymers by the Addition of Carbon Nanotubes as Fillers." MRS Bulletin 32, no. 4 (2007): 348–53. http://dx.doi.org/10.1557/mrs2007.234.

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AbstractThe remarkable electrical and thermal conductivities of isolated carbon nanotubes have spurred worldwide interest in using nanotubes to enhance polymer properties. Electrical conductivity in nanotube/polymer composites is well described by percolation, where the presence of an interconnected nanotube network corresponds to a dramatic increase in electrical conductivity ranging from 10−5 S/cm to 1 S/cm. Given the high aspect ratios and small diameters of carbon nanotubes, percolation thresholds are often reported below 1 wt% although nanotube dispersion and alignment strongly influence

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Kim, Jeong-Hyeon, Jong-Min Kim, Sungkyun Park, Kang Hyun Park, and Jae-Myung Lee. "Synthesis and cryogenic mechanical properties of CO2-blown carbon-reinforced polyurethane foam." Journal of Cellular Plastics 54, no. 4 (2017): 743–63. http://dx.doi.org/10.1177/0021955x17750389.

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In the present study, carbon-nanotube-polyurethane foams were synthesized by adding (0.02, 0.1, and 0.3 wt%) carbon nanotubes during the polymerization reaction between polyol and isocyanate liquids. After the synthesis process, the microstructural cell morphology of the carbon-nanotube-polyurethane foams, based on the amount of carbon nanotubes, was observed using field emission scanning electron microscopy. To evaluate the mechanical characteristics of the carbon-nanotube-polyurethane foams, temperature-dependent (20°C, −90°C, and −163°C) compressive tests were performed, and the results wer

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Mei, Hui, Qianglai Bai, Konstantinos Dassios, Haiqing Li, Laifei Cheng, and Costas Galiotis. "Morphological and Microstructural Property Comparison of Bulk and Aligned Cvd-Grown Carbon Nanotubes." Advanced Composites Letters 23, no. 1 (2014): 096369351402300. http://dx.doi.org/10.1177/096369351402300101.

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Carbon nanotubes are one-dimensional materials found in various forms, the most important of which are bulk unordered carbon nanotubes of lengths of few microns and aligned tubes regularly a few millimeters long. Differences in length, orientation, alignment, nanotube graphitization and purity will influence the eventual performance of the material. Herein four characterization methods are used to characterize and compare bulk and aligned carbon nanotubes. Results show that the diameters of the millimeter-long aligned carbon nanotubes are approximately 60 ∼ 80 nm with thick nanotube walls of a

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Daljit, Singh. "PHONON PROPERTIES OF BORON NITRIDE NANOSHEET." International Journal of Current Research and Modern Education 2, no. 2 (2017): 71–74. https://doi.org/10.5281/zenodo.853327.

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The exceptional properties of Boron Nitrides (BN) nanotube have attracted the attention of the researchers in past few years. BN nanotubes can be considered as insulating materialand are highly resistive to oxidation. In air BN nanotubes are stable up to at least 700˚C while highly crystalline and low defective BN nanotubes show stability up to 900˚C. High density nano electronic devices demands a nano material with good thermal conductivityand BN nanotube is among the best options as its thermal conductivity is high. BN nanotube show lot of other excellent properties like non cytotoxicity and

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Majidi, Roya, Hamid Reza Taghiyari, and Mahsa Ekhlasi. "Adsorption Patterns of Helium on Carbon and Cellulose Nanotubes: Molecular Dynamics Simulations." Nano 12, no. 03 (2017): 1750036. http://dx.doi.org/10.1142/s1793292017500369.

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Molecular dynamics simulations were performed to study helium adsorption on carbon and cellulose nanotubes. Adsorption isotherms were analyzed at different temperatures and pressures. All adsorption isotherms for carbon and cellulose nanotubes were predicted to be of Langmuir shape type I. Helium adsorption was observed both inside and outside of open-ended tubes. Increasing temperatures caused lower helium adsorption on carbon and cellulose nanotubes. The calculated quantities confirmed that the adsorption capacity of the cellulose nanotube was greater than that of the carbon nanotube. The ad

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ZHU, YINGCHUN. "INSIGHT INTO THE STRUCTURE AND FORMATION OF TITANIUM OXIDE NANOTUBES." Functional Materials Letters 01, no. 03 (2008): 239–46. http://dx.doi.org/10.1142/s1793604708000435.

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Titanium oxide nanotube is a promising material for versatile applications. However, its structure and formation mechanism were quite confusedly reported. Therefore, it is essential to fully understand its structure, formation mechanism and stability. In this study, the structure, formation and stability of titanium oxide nanotube were studied in detail. New experimental findings on the morphology of titanium oxide nanotubes were reported, demonstrating close-opened nanotubes, cone-shaped nanotubes, twin and ternary nanotubes etc. A structural model of the titanium oxide nanotubes is proposed

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SUENAGA, Kazutomo. "Nanotube. Hetero-Nanotubes." SHINKU 42, no. 8 (1999): 735–40. http://dx.doi.org/10.3131/jvsj.42.735.

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Marquis, Fernand D. S. "Carbon Nanotube Nano Composites for Multifunctional Applications." Materials Science Forum 561-565 (October 2007): 1397–402. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.1397.

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Owing to their exceptional stiffness, strength, thermal and electrical conductivity, carbon nanotubes have the potential for the development of nano composites materials for a wide variety of applications. In order to achieve the full potential of carbon nanotubes for structural, thermal and electrical multifunctional applications, both single wall carbon nanotubes (SWNTs), double wall nanotubes (DWNTs) and multi wall nanotubes (MWNTs) need to be developed into fully integrated carbon nanotube composites. Full integration of nanotubes requires their development beyond conventional composites s

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ROLAND, C., M. BUONGIORNO NARDELLI, H. GUO, et al. "THEORETICAL INVESTIGATIONS OF QUANTUM TRANSPORT THROUGH CARBON NANOTUBE DEVICES." Surface Review and Letters 07, no. 05n06 (2000): 637–42. http://dx.doi.org/10.1142/s0218625x00000774.

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By combining a nonequilibrium Green's function analysis with a standard tight-binding model, we have investigated quantum transport through carbon nanotube devices. For finite-sized nanotubes, transport is dominated by resonant tunneling, with the conductance being strongly dependent on the length of the nanotubes. Turning to nanotube devices, we have investigated spin-coherent transport in ferromagnetic–nanotube–ferromagnetic devices and nanotube-superconducting devices. The former shows a significant spin valve effect, while the latter is dominated by resonant Andreev reflections. In additio

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Lv, Yan. "Fabrication of Nickel Nanotube Using Anodic Oxidation and Electrochemical Deposition Technologies and Its Hydrogen Storage Property." Journal of Nanomaterials 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/4057829.

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Electrochemical deposition technique was utilized to fabricate nickel nanotubes with the assistance of AAO templates. The topography and element component of the nickel nanotubes were characterized by TEM and EDS. Furthermore, the nickel nanotube was made into microelectrode and its electrochemical hydrogen storage property was studied using cyclic voltammetry. The results showed that the diameter of nickel nanotubes fabricated was around 20–100 mm, and the length of the nanotube could reach micron grade. The nickel nanotubes had hydrogen storage property, and the hydrogen storage performance

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Siregar, Syahril, Sri Oktamuliani, and Yoshifumi Saijo. "A Theoretical Model of Laser Heating Carbon Nanotubes." Nanomaterials 8, no. 8 (2018): 580. http://dx.doi.org/10.3390/nano8080580.

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We present a theoretical model of laser heating carbon nanotubes to determine the temperature profile during laser irradiation. Laser heating carbon nanotubes is an essential physics phenomenon in many aspects such as materials science, pharmacy, and medicine. In the present article, we explain the applications of carbon nanotubes for photoacoustic imaging contrast agents and photothermal therapy heating agents by evaluating the heat propagation in the carbon nanotube and its surrounding. Our model is constructed by applying the classical heat conduction equation. To simplify the problem, we a

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Shi, Dong-Li, Xi-Qiao Feng, Yonggang Y. Huang, Keh-Chih Hwang, and Huajian Gao. "The Effect of Nanotube Waviness and Agglomeration on the Elastic Property of Carbon Nanotube-Reinforced Composites." Journal of Engineering Materials and Technology 126, no. 3 (2004): 250–57. http://dx.doi.org/10.1115/1.1751182.

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Owing to their superior mechanical and physical properties, carbon nanotubes seem to hold a great promise as an ideal reinforcing material for composites of high-strength and low-density. In most of the experimental results up to date, however, only modest improvements in the strength and stiffness have been achieved by incorporating carbon nanotubes in polymers. In the present paper, the stiffening effect of carbon nanotubes is quantitatively investigated by micromechanics methods. Especially, the effects of the extensively observed waviness and agglomeration of carbon nanotubes are examined

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36

CAVNESS, B., N. McGARA, and S. WILLIAMS. "SPECTRA OF RADIATION EMITTED FROM OPEN-ENDED AND CLOSED CARBON NANOTUBES EXPOSED TO MICROWAVE FIELDS." International Journal of Nanoscience 12, no. 04 (2013): 1350028. http://dx.doi.org/10.1142/s0219581x13500282.

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We performed experiments in which both open-ended and closed carbon nanotubes were exposed to 2.46 GHz microwaves over the course of several irradiation and cooling cycles at a pressure of ~ 10-6 torr. The spectra of the radiation emitted from the nanotubes indicate that the intensity of the emitted radiation with wavelengths of 650–1000 nm increased during the irradiation cycles. However, the intensity of the radiation emitted from untreated nanotubes increased substantially more than the intensity of the radiation emitted from nanotubes that had been chemically treated in order to open nanot

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37

Han, Ki Bong, and Yong Ho Choi. "Characterization of Contact Resistance between Carbon Nanotubes Film and Metal Electrodes." Advanced Materials Research 683 (April 2013): 238–41. http://dx.doi.org/10.4028/www.scientific.net/amr.683.238.

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Abstract (sommario):

Carbon nanotube has attracted great research attentions due to its outstanding electrical, physical, mechanical, chemical properties. Based on its excellent properties, the carbon nanotube is promising nanoscale material for novel electrical, mechanical, chemical, and biological devices and sensors. However, it is very difficult to control the structure of carbon nanotube during synthesis. A carbon nanotubes film has 3 dimensional structures of interwoven carbon nanotubes as well as unique properties such as transparency, flexibility and good electrical conductivity. More importantly, the prop

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38

Kaplan-Ashiri, I., S. R. Cohen, K. Gartsman, R. Rosentsveig, G. Seifert, and R. Tenne. "Mechanical behavior of individual WS2 nanotubes." Journal of Materials Research 19, no. 2 (2004): 454–59. http://dx.doi.org/10.1557/jmr.2004.19.2.454.

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The Young's modulus of WS2 nanotubes is an important property for various applications. Measurements of the mechanical properties of individual nanotubes are challenged by their small size. In the current work, atomic force microscopy was used to determine the Young's modulus of an individual multiwall WS2 nanotube, which was mounted on a silicon cantilever. The buckling force was measured by pushing the nanotube against a mica surface. The average Young's modulus of an individual WS2 nanotube, which was calculated by using Euler's equation, was found to be 171 GPa. First-principle calculation

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39

Cui, Zhi Min, Cui Zhi Dong, Ying Chen, and Qing Jun Zhang. "Hollow Structure of Nano-Crystals by Microemulsion Method." Advanced Materials Research 391-392 (December 2011): 260–63. http://dx.doi.org/10.4028/www.scientific.net/amr.391-392.260.

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Abstract (sommario):

Nano-crystals with hollow structure were synthesized by microemulsion method. XRD(X-rays Diffraction), EDS(Energy Dispersive Spectrometer) and TEM(Transmission Electron Micrograph) techniques were used to characterize the structure, composition and morphology of nano-crystals. Results of XRD and ED(Electron Diffraction) revealed that nano-crystals were the mixture of CdSe and CdSeO3. TEM images shows nanotube and bamboo-like nanotube, CdSe nano-particles are observed in bamboo-like nanotubes. Reports on nanotubes and bamboo-like nanotubes by microemulsion method are little. In this experiment

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40

Treacy, M. M. J., and T. W. Ebbesen. "Mechanical Properties of Carbon Nanotubes Inferred from TEM." Microscopy and Microanalysis 3, S2 (1997): 393–94. http://dx.doi.org/10.1017/s1431927600008850.

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Abstract (sommario):

The discovery of carbon nanotubes by Iijima has stimulated considerable research into their structural, chemical, electrical and mechanical properties. Apart from their intrinsic beauty as macromolecules, and their possibilities as one-dimensional conductors, researchers are stimulated by the notion that a structurally perfect nanotube may be one of the strongest known materials.It is known that when nanotubes are bent through large angles, regions of high curvature buckle to develop crimps, similar to those observed when metal pipes are bent too much. Figure la shows a multi-walled nanotube t

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Alanka, Sandeep, Chanamala Ratnam, and Balla Srinivasa Prasad. "Characterization of cubic tumbler rod milled dispersed carbon nanotubes–Aluminum composites." Journal of Composite Materials 52, no. 28 (2018): 3973–85. http://dx.doi.org/10.1177/0021998318773437.

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Abstract (sommario):

In this work, cubic tumbler rod milling was used to disperse X wt% multiwalled carbon nanotubes (X = 0.5, 0.75, 1.0) in an aluminum matrix. Dispersed precursor of aluminum–multiwalled carbon nanotube composite was subsequently consolidated by cold compaction followed by sinter-forged process. Microstructural and mechanical behaviors of as-produced aluminum–multiwalled carbon nanotube composites with different concentration were investigated. Findings revealed that the as-produced Al–0.75 wt% carbon nanotube sinter-forged composite exhibits homogenous distribution and embedded nanotubes confirm

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42

Rouhi, S., R. Ansari, and A. Nikkar. "On the vibrational characteristics of single-walled boron nitride nanotubes/polymer nanocomposites: A finite element simulation." Modern Physics Letters B 31, no. 22 (2017): 1750208. http://dx.doi.org/10.1142/s0217984917502086.

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Abstract (sommario):

The finite element method is used here to investigate the vibrational behavior of single-walled boron nitride nanotube/polymer nanocomposites. The polymer matrix is modeled as a continuous media. Besides, nanotubes are modeled as a space-frame structure. It is shown that increasing the length of nanotubes at a constant volume fraction leads to decreasing of the nanocomposite frequency. By investigating the effect of volume percentage on the frequencies of the boron nitride nanotube-reinforced polymer nanocomposites, it is observed that for short nanotubes, the nanocomposites with larger nanotu

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43

RAMESH, PALANISAMY, KENICHI SATO, YUJI OZEKI, et al. "MICROSCOPIC CHARACTERIZATION OF THIN-MULTIWALL CARBON NANOTUBES SYNTHESIZED BY CATALYTIC CVD METHOD WITH MESOPOROUS SILICA." Nano 01, no. 03 (2006): 207–12. http://dx.doi.org/10.1142/s1793292006000227.

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Abstract (sommario):

Carbon nanotubes with 1–6 walls have been grown on cobalt-loaded mesoporous silica (i.e., MCM41) by using acetylene catalytic chemical vapor deposition. It is found that titanium grafting on the MCM41 pore walls prior to cobalt loading promotes the growth of nanotubes with 1–6 walls. As-grown nanotube material is found to be a mixture of single-wall carbon nanotubes (SWNTs), double-wall carbon nanotubes (DWNTs) and thin-multiwall carbon nanotubes (t-MWNTs) with 3–6 walls. Annealing of the as-grown nanotubes has reduced the amount of SWNTs in the nanotube mixture. Several structural deformation

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44

Kharlamova, Marianna V. "Investigation of growth dynamics of carbon nanotubes." Beilstein Journal of Nanotechnology 8 (April 11, 2017): 826–56. http://dx.doi.org/10.3762/bjnano.8.85.

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Abstract (sommario):

The synthesis of single-walled carbon nanotubes (SWCNTs) with defined properties is required for both fundamental investigations and practical applications. The revealing and thorough understanding of the growth mechanism of SWCNTs is the key to the synthesis of nanotubes with required properties. This paper reviews the current status of the research on the investigation of growth dynamics of carbon nanotubes. The review starts with the consideration of the peculiarities of the growth mechanism of carbon nanotubes. The physical and chemical states of the catalyst during the nanotube growth are

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45

Tomilin O. B., Rodionova E. V., Rodin E.A., Poklonski N. A., Anikeyev I. I., and Ratkevich S. V. "Dependence of the energy of emission molecular orbitals in short open carbon nanotubes on the electric field." Physics of the Solid State 64, no. 3 (2022): 347. http://dx.doi.org/10.21883/pss.2022.03.53191.201.

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Abstract (sommario):

On the examples of short open carbon nanotubes of armchair type (n,n), for n=3, 4, and zigzag (n,0), for n=5, 6, 7, the influence of the magnitude and direction of the external constant electric field vector on their field emission properties was studied. It is shown that the deviation of the field vector from the nanotube axis leads to an increase in the field strength to generate electron field emission. Emission orbitals in carbon nanotubes (n,n) found as a result of a new type of conjugation of p-electrons in cylindrical conjugated systems are more sensitive to a change in the direction of

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46

Andersson, M., P. Alberius-Henning, K. Jansson, and M. Nygren. "Preparation of Carbon Nanotubes from CO and in situ Formed Nano-sized Pd Particles." Journal of Materials Research 15, no. 8 (2000): 1822–27. http://dx.doi.org/10.1557/jmr.2000.0263.

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Abstract (sommario):

Carbon nanotubes, typically of 0.5-μm length and 20-nm diameter, were prepared with good selectivity by disproportionation of CO in He over a Pd/La2O3 catalyst. The catalyst was formed in situ by reduction of a La4PdO7 precursor. The obtained nanotubes had the so-called fishbone structure with the graphitic planes inclined at an angle to the long axis of the nanotube. The effect of CO concentration was studied at 673 °C, and it was found that, among the concentrations studied, 20 vol% CO in the gas was suitable for nanotube growth. The obtained nanotube/La2O3/Pd composite contained typically o

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47

Kono, Junichiro. "(Invited, Digital Presentation) Macroscopically Aligned Carbon Nanotubes for Photonics, Electronics, and Thermoelectrics." ECS Meeting Abstracts MA2022-01, no. 10 (2022): 775. http://dx.doi.org/10.1149/ma2022-0110775mtgabs.

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Abstract (sommario):

The remarkable flexibility, stable chemical structure, and extraordinary thermal, electrical, and optical properties of carbon nanotubes (CNTs) are promising for a variety of applications in flexible and/or high-temperature electronics, optoelectronics, and thermoelectrics, including wearables, refractory photonics, and waste heat harvesting [1]. However, the long-standing goal in the preparation of CNT ensembles is how to maintain the extraordinary properties of individual CNTs on a macroscopic scale. The polydispersity and randomness remain two main challenges. Here, we will discuss differen

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48

Komane, Patrick P., Yahya E. Choonara, Lisa C. du Toit, et al. "Diagnosis and Treatment of Neurological and Ischemic Disorders Employing Carbon Nanotube Technology." Journal of Nanomaterials 2016 (2016): 1–19. http://dx.doi.org/10.1155/2016/9417874.

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Abstract (sommario):

Extensive research on carbon nanotubes has been conducted due to their excellent physicochemical properties. Based on their outstanding physicochemical properties, carbon nanotubes have the potential to be employed as theranostic tools for neurological pathologies such as Alzheimer’s disease and Parkinson’s disease including ischemic stroke diagnosis and treatment. Stroke is currently regarded as the third root cause of death and the leading source of immobility around the globe. The development and improvement of efficient and effective procedures for central nervous system disease diagnosis

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Tadi Beni, Yaghoub, Fahimeh Mehralian, and Mehran Karimi Zeverdejani. "Free vibration of anisotropic single-walled carbon nanotube based on couple stress theory for different chirality." Journal of Low Frequency Noise, Vibration and Active Control 36, no. 3 (2017): 277–93. http://dx.doi.org/10.1177/0263092317700153.

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Abstract (sommario):

In the present work, using the couple stress theory, a new model is provided for vibrating behavior of anisotropic carbon nanotubes. Carbon nanotubes have many applications, and careful analysis of their behavior is important. So far, using the isotropic models, several studies have been conducted on carbon nanotube vibration. According to the arrangement of carbon atoms on the nanotube walls, their properties will be different in various directions. Therefore, the behavior of carbon nanotubes must be considered as anisotropic materials. In this article, initially, using the Hamilton's princip

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Jin, Weifeng, Ying Tao, and Rongzhong Cheng. "Coupled Effect of Carbon Nanotubes and Crushing on Shear Strength and Compression of Calcareous Sand Seeped by Colloidal Silica." Geofluids 2022 (August 12, 2022): 1–17. http://dx.doi.org/10.1155/2022/9335126.

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Abstract (sommario):

Colloidal silica, which has a low viscosity, can seep quickly through sand and subsequently form silica gel to stabilize the sand. The addition of carbon nanotubes can improve the strength of the sand-gel composite. However, previous literature has not investigated the coupled effect of carbon nanotubes and sand crushing on the strength and compression of colloidal-silica-stabilized calcareous sand. So we prepared 86 specimens with 2 different concentrations of colloidal silica and 9 different contents of carbon nanotubes. Then, we performed triaxial shearing and isotropic compression tests ba

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