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Relevant bibliographies by topics / Nano-tubular

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Academic literature on the topic 'Nano-tubular'

Author: Grafiati

Published: 3 June 2025

Last updated: 22 June 2025

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Journal articles on the topic "Nano-tubular"

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Xu, Yi Kun, and Mao-Sheng Zhan. "Gradient Microstructure Analysis of PI-SiO2 Hybrid Tubular Films." Materials Science Forum 475-479 (January 2005): 1575–78. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.1575.

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PI-SiO2 hybrid seamless tubular films with gradient microstructure were prepared by sol-gel insitu polymerization and rotational moulding process. Energy Dispersive X-Ray Spectrometry (EDS) and Field Emitter Scanning Electron Microscope (FE-SEM) were used to evaluate the spatial gradient distribution of SiO2 in the PI-SiO2 hybrid tubular films. The experimental results showed that the SiO2 particles were dispersed at nanoscale in the PI matrix, and that the size and the dispersivity of the SiO2 particles changed gradiently along the tubular film cross-section. The lower the SiO2 distribution density, the smaller the SiO2 particles. When the SiO2 content exceeded a certain value, some SiO2 nano-particles aggregated into nano-clusters with thyrsiform structure, and the nano-clusters aggregated more into limbate globoids.

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Koutinas, Athanasios A., Vasilios Sypsas, Panagiotis Kandylis, et al. "Nano-Tubular Cellulose for Bioprocess Technology Development." PLoS ONE 7, no. 4 (2012): e34350. http://dx.doi.org/10.1371/journal.pone.0034350.

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Li, Shasha, Rui Liu, Deribachew Bekana, Yujian Lai, and Jingfu Liu. "Self-assembly of supramolecular nanotubes/microtubes from 3,5-dimethyl-4-iodopyrazole for plasmonic nanoparticle organization." Nanoscale 10, no. 44 (2018): 20804–12. http://dx.doi.org/10.1039/c8nr07372d.

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We developed a simple but effective building block, 3,5-dimethyl-4-iodopyrazole, which can hierarchically self-assemble into tubular nano-/micro-architectures. The tubular assemblies can be utilized as an excellent template for the controlled organization of Au/Ag NPs.

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Syssa-Magalé, Jean-Laurent, Kamal Boubekeur, Jacques Leroy, Lise-Marie Chamoreau, Claire Fave, and Bernd Schöllhorn. "Directed synthesis of a halogen-bonded open porphyrin network." CrystEngComm 16, no. 45 (2014): 10380–84. http://dx.doi.org/10.1039/c4ce01704h.

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Neamatallah, Thikryat, Nagla El-Shitany, Aymn Abbas, et al. "Nano Ellagic Acid Counteracts Cisplatin-Induced Upregulation in OAT1 and OAT3: A Possible Nephroprotection Mechanism." Molecules 25, no. 13 (2020): 3031. http://dx.doi.org/10.3390/molecules25133031.

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Cisplatin is an anticancer drug commonly used for solid tumors. However, it causes nephrotoxicity. OAT1 and OAT3 are organic anion transporters known to contribute to the uptake of cisplatin into renal tubular cells. The present study was designed to examine the protective role of ellagic acid nanoformulation (ellagic acid nano) on cisplatin-induced nephrotoxicity in rats, and the role of OAT1/OAT3 in this effect. Four groups of male Wistar rats were used (n = 6): (1) control, (2) cisplatin (7.5 mg/kg single dose, intraperitoneal), (3) cisplatin + ellagic acid nano (1 mg/kg), and (4) cisplatin + ellagic acid nano (2 mg/kg). Nephrotoxic rats treated with ellagic acid nano exhibited a significant reduction in elevated serum creatinine, urea, and oxidative stress marker, malondialdehyde (MDA). Additionally, ellagic acid nano restored renal glutathione (GSH), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx). Ellagic acid nano improved the histopathological changes induced by cisplatin, such as tubular dilatation, necrosis, and degeneration. Interestingly, OAT1 and OAT3 showed significantly lower expression at both mRNA and protein levels following ellagic acid nano treatment relative to the cisplatin-exposed group. These findings reveal a potential inhibitory role of ellagic acid antioxidant on OAT1 and OAT3 expression and thus explains its nephroprotective effect against cisplatin nephrotoxicity.

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Choi, Seung Won, Hyung Jin Kim, Woong Ki Jang, Young Ho Seo, and Byeong Hee Kim. "Tubular Nano-Mesh Fabrication by Aluminum Anodic Oxidation." Journal of the Korean Society for Precision Engineering 34, no. 7 (2017): 501–5. http://dx.doi.org/10.7736/kspe.2017.34.7.501.

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Razeeb, Kafil M., Joanna Podporska-Carroll, Mamun Jamal, et al. "Antimicrobial properties of vertically aligned nano-tubular copper." Materials Letters 128 (August 2014): 60–63. http://dx.doi.org/10.1016/j.matlet.2014.04.130.

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Kong, Chunlong, Hongbing Du, Liang Chen, and Banglin Chen. "Nanoscale MOF/organosilica membranes on tubular ceramic substrates for highly selective gas separation." Energy & Environmental Science 10, no. 8 (2017): 1812–19. http://dx.doi.org/10.1039/c7ee00830a.

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Yun, Ruirui, Yaqin Jiang, Shizhong Luo, and Cheng Chen. "Three-dimensional coordination polymers constructed from C2-symmetric linkers of pyridyl dicarboxylate ligands." RSC Adv. 4, no. 69 (2014): 36845–48. http://dx.doi.org/10.1039/c4ra07128j.

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Srivastava, Amit, Jamal Hassan, and Dirar Homouz. "Effect of Size and Temperature on Water Dynamics inside Carbon Nano-Tubes Studied by Molecular Dynamics Simulation." Molecules 26, no. 20 (2021): 6175. http://dx.doi.org/10.3390/molecules26206175.

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Water transport inside carbon nano-tubes (CNTs) has attracted considerable attention due to its nano-fluidic properties, its importance in nonporous systems, and the wide range of applications in membrane desalination and biological medicine. Recent studies show an enhancement of water diffusion inside nano-channels depending on the size of the nano-confinement. However, the underlying mechanism of this enhancement is not well understood yet. In this study, we performed Molecular Dynamics (MD) simulations to study water flow inside CNT systems. The length of CNTs considered in this study is 20 nm, but their diameters vary from 1 to 10 nm. The simulations are conducted at temperatures ranging from 260 K to 320 K. We observe that water molecules are arranged into coaxial water tubular sheets. The number of these tubular sheets depends on the CNT size. Further analysis reveals that the diffusion of water molecules along the CNT axis deviates from the Arrhenius temperature dependence. The non-Arrhenius relationship results from a fragile liquid-like water component persisting at low temperatures with fragility higher than that of the bulk water.

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Dissertations / Theses on the topic "Nano-tubular"

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Ghoman, Baljinder Singh. "Hydrogen storage in tubular carbon nano-structures." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611507.

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Shenashen, M. A., and S. A. El-Safty. "Visual Detection and Recovery of Mercury in Water and Blood Samples Using Nano-membrane Tubular Architectures." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42664.

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Engineered control over one-dimensional (1D) mesoporous silica nanotubes (NTs) inside anodic alumina membranes (AAMs) has led to various methods for detecting, visualizing, adsorbing, filtering, and recovering ultra-trace concentrations of toxic metal ions, such as Hg2+ and Pb2+, in water and blood. These often “one-pot” screening methods offer advantages over conventional methods in that they do not need sophisticated instruments or laborious sample preparation. This mesoscopic membrane sensor for the nakedeye detection micro-object have large surface area-to-volume ratios and uniformly shaped pores in threedimensional nanoscale gyroidal structures and its active sites consist of heteroatoms arranged around uniformly shaped pores in three-dimensional (3D) nanoscale gyroidal mesostructures densely coated with the chelating ligand so it permits ultra-fast, specific, pH-dependent visualization and removal of toxic metals at low concentrations from aqueous media, including drinking water and a suspension of red blood cells by means of a colorimetric signal visible to the naked eye, as well as by means of UV–vis reflectance spectroscopy. Removal of target ions from biological fluids was assessed by means of flow cytometric analysis. Our results demonstrate the potential for our membrane sensors to be used for preventing the health risks associated with exposure to toxic metal ions in the environment and blood.

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Solovev, Alexander Alexandrovich. "Catalytic Tubular Micro-Jet Engines." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-92005.

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This dissertation offers demonstrations of autonomous catalytic microtubes (microjet engines) with tunable diameters ranging from micro- to nanoscale and lengths from 50 μm to 1 mm. These results open the door to effective microengines and represent the entry in the Guinness Book of World Records for “the smallest man-made jet engine.” Several attractive methodologies of machine-based functions at the micro- and nanoscale are shown. For instance, catalytic Ti/Cr/Pt microjets, which are integrated on a planar substrate, can operate as “on chip” chemical micropumps by decomposition of hydrogen peroxide fuel into oxygen bubbles and water. When released from a substrate, microjets self-propel autonomously in solution. The incorporation of ferromagnetic layer (Fe) into the rolled-up geometry enables their remote control using external magnetic field. Such microjets were used to load, transport, deliver and assemble multiple cargo particles, including biological cells in bulk solutions and microfluidic channels. Furthermore, it is demonstrated that for microjets that are fixed to or self-propelled above a platinum patterned surface, the microengine power/speed can be controlled using a white lightsource. A change in intensity of the white light leads to a controllable switching “off” and “on” of the microengine power on demand. Light degrades a local concentration of the hydrogen peroxide fuel and surface tension and subsequently suppresses the generation of oxygen microbubbles. In the next step, the diameter of the microjets was rigorously reduced to 250 nm by using hybrid heteroepitaxial/catalytic InGaAs/GaAs/Cr/Pt nanotubes. Due to asymmetry of the rolled-up layers, these nanojets move in corkscrew-like motions and act as “self-propelled nanotools,” which were used in the next step to transport yeast cells and drill into fixed cancer Hela cells. Although it is well-known that hydrogen peroxide cannot be used to sustain viable cellular function, it is however conceivable that alternative fuels, such as glucose, might enable operation of such nanotools under biologically compatible conditions. As a first step to achieve this goal, demonstrations were made using metal-enzyme biocatalytic Ti/Au/SAM/Catalase microengines. Synthetic components with competing interactions are well-suited to study the emergence of their collective behavior, such as swarms of large numbers of individuals. Microengines’ self-organization in bistable swarms is shown at the air-liquid interface of the mixture of propylene carbonate and hydrogen peroxide. Microengines act as “water striders.” Buoyed by oxygen bubbles, they self-propel via the microbubble recoiling mechanism and, depending on the bubbles’ sizes, self-organize into swarms due to the meniscus climbing effect. These reversible swarms depend on the microengine power, which competes against attracting surface tension force. The demonstrated microjet engines show great promise for emerging applications, including biomedical, on-chip, environmental, and robotic micromachines. Furthermore, a key method discovered, entitled “rolled-up nanotechnology on polymers,” allowed for the fabrication of highly parallel arrays of microtubes with multiple functionalities and aimed for different purposes.

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CHIU, JO-SHAN, and 丘若姍. "The Fabrication and Study of Tubular Aluminum Oxide Nano-Template." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/265sz6.

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碩士<br>國立聯合大學<br>能源工程學系碩士班<br>105<br>In this study, we produce an anodic aluminum oxide (AAO) nano/sub-micro film on the 5N aluminum pipes by anodization process. The AAO is an ordering porous array. However, there are some problems such as instable current density, a large amount of heat of reaction and difficult to control the temperature of electrolytic tank during the fabrication process of tubular AAO templates. In order to solve these problems and fabricate high quality AAO, we use the electrolytic tank (includes cooling system) and aluminum substrate removal equipment designed by ourselves for anodization along with suitable anodization parameters. And then, we improve the instable temperature of the electrolytic tank and current density successfully and could produce many tubular AAO templates with 150~200µm film thickness at a time. Furthermore, it is possible to combine the sol-gel method with tubular AAO templates to make photocatalyst materials with high surface area of titanium dioxide particles/film. Promote the value of traditional anodization technique by developing related products.

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Books on the topic "Nano-tubular"

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Leonovich, Sergey, and Elena Sadovskaya. Technology and properties of fiber reinforced concrete with a nanomodified matrix. INFRA-M Academic Publishing LLC., 2024. https://doi.org/10.12737/2085120.

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The monograph substantiates the concept of multilevel reinforcement of structural heavy concrete, including the level of nano-, micro-reinforcement of cement stone with tubular carbon nanomaterials and macro-reinforcement of the concrete structure with steel fiber. Fiber-reinforced concrete compositions have been developed to determine the optimal content of steel fiber and carbon nanomaterial during monoarming, the properties of fiber-reinforced concrete of multilevel reinforcement with a combination of nano-, micro-reinforcement with tubular UNM and macro-reinforcement with steel fiber have been studied. A technique has been developed for a multiparametric assessment of the properties of fiber reinforced concrete of multilevel polydisperse reinforcement in order to determine strength, crack resistance and deformability in laboratory and building conditions. A set of technological measures for conducting concrete works with the preparation and use of fiber reinforced concrete of multilevel polydisperse reinforcement in the construction of monolithic building structures is proposed. A comprehensive methodology for assessing the quality of fiber concrete in building structures has been developed.

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Segal, D., P. Kral, and M. Shapiro. Theory, experiment and applications of tubular image states. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533046.013.22.

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This article presents a detailed theoretical description of tubular image states (TIS) around different tube geometries, along with their applications. It begins with a discussion of the theoretical background for the existence of TIS in conjunction with infinitely long homogeneous carbon nanotubes, finite and inhomogeneous nanotubes, and nanotubes arrays. It then considers the lifetimes and stability of TIS, along with the states’ tunability by external fields and the onset of chaos in TIS. In particular, it examines how TIS can be manipulated by means of electric and magnetic fields. It also describes nano-Paul traps of single electrons based on TIS and concludes with an assessment of recent experiments on TIS.

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Book chapters on the topic "Nano-tubular"

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Athikesavan, Muthu Manokar, Fausto Pedro García Márquez, Mohamed Thalib Mohamed Rafeek, and Ravishankar Sathyamurthy. "Annual Yield, Energy and Economic Analysis of Tubular Solar Stills with Phase Change Material and Nano-enhanced Phase Change Material." In Proceedings of the Fifteenth International Conference on Management Science and Engineering Management. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-79206-0_35.

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Sánchez, Samuel, Wang Xi, Alexander A. Solovev, Lluís Soler, Veronika Magdanz, and Oliver G. Schmidt. "Tubular Micro-nanorobots: Smart Design for Bio-related Applications." In Small-Scale Robotics. From Nano-to-Millimeter-Sized Robotic Systems and Applications. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-55134-5_2.

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Raman, A. P. S. "HNT-Cellulose based Nano-Composite and Applications." In Advanced Applications of Micro and Nano Clay. Materials Research Forum LLC, 2022. http://dx.doi.org/10.21741/9781644901915-11.

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Halloysite, a naturally occurring nanoclay has unique characteristics like nanometric size range, tubular structure, high biocompatibility, low cost and opposite charges on its surface is driving attraction as a versatile and important component of biomaterials. The incorporation of functionalized Halloysite nanotubes (HNT) with the cellulose biopolymer is to obtain enhanced and desirable properties like mechanical strength, and barrier properties and to have controlled pore size. The enhanced properties of bio-nano composites are employed in wide areas including food packaging, the automobile industry, drug delivery and many more. In this chapter, extended work on various HNT-cellulose-based bio- nanocomposites is provided along with their structural, and functional properties including their applications.

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Santhosh, G. "Halloysite-Chitosan based Nano-Composites and Applications." In Advanced Applications of Micro and Nano Clay. Materials Research Forum LLC, 2022. http://dx.doi.org/10.21741/9781644901915-2.

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Chitosan is the most abundant and excellent natural polymer (PMR). The wider usage of chitosan is because of its antimicrobial, non-toxic, biocompatible and biodegradable nature. Chitosan is extracted from crustaceans and squids. Chitosan has been extensively studied in the field of wastewater treatment and biomedical applications. Halloysite nanotube (HNT) is a sort of aluminosilicate nano-clay, famous for their high aspect ratio and hallow configuration, HNT as a nano-filler for polymer matrix can be profitably utilized. HNT with the molecular formula, H4Al2O9Si2·2H2O have unique tubular structure make them suitable as nano-containers with the intention to store and adsorb with abundant –OH groups. The use of HNT can provide high mechanical strength, high thermal stability and bio-acceptability. With the incorporation of nanosized halloysites nanotubes into chitosan matrix generally leads to desired property enhancement along with the changes in the microstructure. Amongst the most likely available natural materials, the chitosan and halloysite are attractive ones because of their nontoxic and eco-friendly nature. The halloysite was extensively studied as a carrier material in many drug delivery systems, catalytic support, scaffold for tissue engineering and as a nanofiller for food packaging application. In this chapter, the application of chitosan and HNT in the real world are postulated in order to give insights for future studies.

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Ford, Warren T., and Maxim N. Tchoul. "Carbon Nanotube-containing Polymers." In Polymer Data Handbook. Oxford University PressNew York, NY, 2009. http://dx.doi.org/10.1093/oso/9780195181012.003.0010.

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Abstract Trade Names NanoSolve (Zyvex), Nano In (Nanoledge), RTP compounds (RTP Co.), Stat-Kon (General Electric) Class Polymer composites Structures Single-walled carbon nanotubes (SWNT), mixture of 0.7–2 nm diameters and of chiralities of tubular graphene prepared catalytically by electric arc deposition (arc), pulsed laser vaporization (PLV), high pressure carbon monoxide chemical vapor deposition (HiPco), supported Co–Mo catalyst chemical vapor deposition (CoMoCat), multi-walled carbon nanotubes (MWNT), concentric graphene tubes 10–50 nm diameter prepared by chemical vapor deposition Major Applications Composite reinforcement, electronics, electrostatic dissipation, photovoltaic materials, photoemissive materials Properties of Special Interest Electrical conductivity, thermal conductivity, mechanical strength and flexibility, electronic absorption and emission

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"Vesicular and Tubular Nanoassemblies of an Helical Amphiphilic Polyacetylene." In Nano Science and Technology. CRC Press, 2003. http://dx.doi.org/10.1201/9780203390283-12.

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Shi Li, Bing, Ben Zhong Tang, Junwu Chen, Kevin Ka Leung Cheuk, Xudong Xiao, and Chunli Bai. "Vesicular and Tubular Nanoassemblies of an Helical Amphiphilic Polyacetylene." In Nano Science and Technology. CRC Press, 2003. http://dx.doi.org/10.1201/9780203390283.ch9.

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Ahmad, Mudasir, and Baoliang Zhang. "Functional carbon nano-material as efficient metal ion adsorbent from wastewater." In Fabrication and Functionalization of Advanced Tubular Nanofibers and their Applications. Elsevier, 2023. http://dx.doi.org/10.1016/b978-0-323-99039-4.00001-2.

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Arslan, Serdal. "A Single-Phase Tubular Flux-Switching Generator Analysis for Generating Electrical Energy from Walkways." In Interdisciplinary Studies on Contemporary Research Practices in Engineering- VII. Özgür Yayınları, 2024. https://doi.org/10.58830/ozgur.pub575.c2604.

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Today, alternative methods are being sought for obtaining electrical energy via harvesters. One of these methods is the use of small powerful energy harvesters on walking paths, which has been an important research topic in recent years. For example, these harvesters can be used to obtain electrical energy from both daily walking and sports activities. Piezoelectric material systems generally used to obtain electrical energy from walking paths. Although their power values are in nano or micro values, it can be predicted that significant electrical energy will be gained during use. Electrical energy can also be obtained from systems integrated with linear generators positioned on the walking path. For these applications, both the single-phase model of the linear flux switched generator internal and external moving models have been compared.

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Pratim Das, Partha. "CHEMISTRY OF UNSATURATED ALL THIA AND ALL SELENA DONOR MACROCYCLES: SOME NOTEWORTHY RESULTS." In Futuristic Trends in Chemical Material Sciences & Nano Technology Volume 3 Book 2. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3becm2ch10.

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Unsaturated thiacrown ethers with cis-conformation across the C=C bonds are more conformationally restricted than analogous saturated structures. As a result, they have a high preference for metals when utilised for the formation of metal complexes. In addition, unsaturated selenacrown ethers exhibit a variety of specificity towards metals due to changes in the conformity, diameters, as well as electronegativity. Besides these, role of directional forces are vital in host-guest chemistry. To create three-dimensional architectures containing voids, channels, helices, or networks, such forces are required. Additionally, directional factors are a fundamental prerequisite for the connection involving guests and hosts. Notably crucial ones in pure organic host-guest chemistry are H-bonds and p-p stacking. A wide range of chalcogen-containing molecules are stacked one on top of the other to form columnar or occasionally tubular stacks. They all have intimate chalcogen-chalcogen solid state interactions in general. In this chapter chemistry of all sulphur/selenium based unsaturated macrocycles have been discussed, mainly their synthesis, metal complex formation and structural details.

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Conference papers on the topic "Nano-tubular"

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Lomasney, Christina, Sam Lomasney, and Timm Burnett. "Improving Operations: Boosting Component Performance and Longevity with Nanolaminated Alloy Coatings." In CORROSION 2016. NACE International, 2016. https://doi.org/10.5006/c2016-07878.

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Abstract The use of nanolaminated metallic coatings is an emerging technology that is generating products with material property combinations heretofore not possible. Through a patented electrochemical controlled deposition process, precisely defined configurations of layered metal alloys can be applied to a variety of substrates or as near net shapes. The deposition process can be controlled to produce nano-scale layers with unique interfacial properties resulting in corrosion resistance, elastic modulus, strength, hardness, and fracture toughness combinations uniquely different from conventional material processing. This paper will describe the patented process, characterize the as-deposited material, explore the application of nano laminated nickel-based alloys for downhole service environments and evaluate the potential of this coating to improve corrosion resistance, extended service life and improved safety/integrity of pump, valve and tubular assets.1

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Seleznev, Vladimir A., Victor Ya Prinz, Vladimir A. Aniskin, and Alexander N. Shiplyuk. "Tubular micro- and nano- sensors and actuators for aerodynamics." In 2009 International Student School and Seminar on Modern Problems of Nanoelectronics, Micro- and Nanosystem Technologies (INTERNANO). IEEE, 2009. http://dx.doi.org/10.1109/internano.2009.5335627.

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Ismail, Mujtaba H., Hosham S. Anead, and Khalid F. Sultan. "Experimental investigation of evacuated tubular solar collector performance with (Cu/DW) nano fluid." In 2ND INTERNATIONAL CONFERENCE ON ENGINEERING AND SCIENCE TO ACHIEVE THE SUSTAINABLE DEVELOPMENT GOALS. AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0199706.

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Ryu, Min Hyung, Samuel Wadsworth, Delbert Dorscheid, et al. "Bioengineered Tubular Nano-Fiber Scaffolds For 3D Culture Of Human Airway Smooth Muscle Cells." In American Thoracic Society 2012 International Conference, May 18-23, 2012 • San Francisco, California. American Thoracic Society, 2012. http://dx.doi.org/10.1164/ajrccm-conference.2012.185.1_meetingabstracts.a2252.

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Xu, Congyu, Xiaofen Yu, and Lingli Cheng. "Small-sized large travel nano-positioning system based on tubular permanent magnet synchronous linear motor." In Instruments (ICEMI). IEEE, 2009. http://dx.doi.org/10.1109/icemi.2009.5274269.

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Desai, Anand, James Geer, and Bahgat Sammakia. "Analytical Model of Heat Conduction in a Tubular Geometry With Application to a Nano-Structured Thermal Interface." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79732.

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Power dissipation in electronic devices is projected to increase significantly over the next ten years to the range of 50-150 Watts per cm2 for high performance applications [1]. This increase in power represents a major challenge to systems integration since the maximum device temperature needs to be around 100 C. One of the primary obstacles to the thermal management of devices operating at such high powers is the thermal resistance between the device and the heat spreader or heat sink that it is attached to. Typically the in situ thermal conductivity of interface materials is in the range of 1 to 4 W/mK, even though the bulk thermal conductivity of the material may be significantly higher. In order to improve the effective in-situ thermal conductivity of interface materials nanotubes are being considered as a possible addition to such interfaces. The primary approach taken in the current study is to analyze the enhancement of the thermal interface by adding carbon nano tubular cylinders that are oriented in the direction of transport. This paper presents the results of an analytical study of transport in a thermal interface material that is enhanced with carbon nanotubes. A variety of parametric analyses are carried out, such as by varying the inner diameter of the nanotube and the power dissipation, and the effect on spreading resistance is calculated. The results indicate that for high thermal conductivity nanotubes there is a significant increase in the effective thermal conductivity of the thermal interface material.

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Roy, Brycen R., Nigel M. Sammes, and Toshio Suzuki. "Mechanical Properties of Micro-Tubular SOFCs." In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65261.

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A fundamental issue with micro-tubular Solid Oxide Fuel Cells (SOFCs) is improvement of the mechanical strength of the cell. Fabricated using extrusion and co-firing techniques, the approximately 1.7 mm diameter tubes are composed of NiO-Gd-doped ceria (GDC) as an anode (support tube), GDC as an electrolyte and La0.8Sr0.2Co0.6Fe0.4O3 (LSCF)-GDC as a cathode. The mechanical properties of SOFCs are analyzed through burst testing, c-ring testing, and micro- and nano-indentation testing; the burst test is an especially important parameter because of improved power efficiency at increased fuel pressures. Results from micro- and nano-indentation tests performed on electrolytecoated Ni-GDC anode pellets indicate that the hardness of GDC is comparable or greater than that of YSZ. To develop a trend for the mechanical behavior of micro-tubes in relation to variations in fabrication techniques, several parameters were varied. The standard tubes, used as a baseline for variations had four key design parameters as follows: they were not reduced, contained 40% pore former, were sintered at 1400 °C and had a wall thickness of approximately 0.64 mm. A variation on each of the four parameters was performed. The four variations were 1) to reduce the standard tube, 2) to increase the percent pore former to 60%, 3) to decrease sintering temperature to 1350 °C, and 4) to decrease the wall thickness to approximately 0.56 mm. An average burst strength of 9.6 ± 0.6 MPa was observed for the standard tubes, 14.6 ± 7.0 MPa for the reduced tubes, 5.4 ± 3.2 MPa for the increased pore former, 12.9 ± 4.1 MPa for the decreased sintering temperature and 11.7 ± 2.4 MPa for the thinner tubes.

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Zhang, Chao, Qi Wang, Hao Liu, Xueguang Yuan, Yunxuan Zhu, and Xiaomin Ren. "Simultaneous enhancement of radial resolution and side lobe suppression of tubular hyperlens via introducing a nano-gap layer." In Conference on Photonic MEMS, THz MEMS and Metamaterials, edited by Huikai Xie, Yun-Feng Xiao, and Yuelin Wang. SPIE, 2021. http://dx.doi.org/10.1117/12.2607111.

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Surakasi, Raviteja, P. Kavitha, P. Vidhushini, et al. "Efficiency optimization of a tubular solar still: Insights from Fe2O3-nano enhanced PCM and ZnO-coated basin strategies." In INTERNATIONAL CONFERENCE ON NEWER ENGINEERING CONCEPTS AND TECHNOLOGY: ICONNECT-2024. AIP Publishing, 2025. https://doi.org/10.1063/5.0261799.

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Ahmadian Namini, P., A. A. Babaluo, M. Akhfash Ardestani, E. Jannatduost, and M. Peyravi. "Fabrication of Multilayer Tubular Nanoporous Ceramic Membranes via Gel-Casting Followed by Dip-Coating." In 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2008. http://dx.doi.org/10.1115/micronano2008-70256.

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Abstract:

Multilayer tubular nanoporous ceramic membranes were successfully prepared via gel-casting followed by dip-coating. Tubular alumina porous support systems were manufactured by gel-casting method with pore size in the range of 100–600 nm. Interlayer and top-layer were fabricated with appropriate thickness, morphology and pore size distribution via dip-coating of submicron and nano alumina slurries respectively. The effects of the several parameters such as: solid content, dipping time, vacuum pressure, heating rate and number of coated layers on the structural properties of the prepared nanoporous ceramic membranes were studied to get an appropriate pore size and defect-free surface and then the optimum condition was presented. The morphology and surface quality of nanoporous ceramic membranes were investigated by optical microscopy (OM) and thickness of fabricated interlayer and top-layer were examined with scanning electron microscopy (SEM). Mercury porosimeter measurements were performed to determine the open porosity, pore size and pore size distribution (PSD) of nanoporous ceramic membranes.

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