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Growth of straight carbon nanotubes by simple thermal chemical vapor deposition

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中国有色金属学会会刊：英文版 2006年第B2期16卷 689-691页

作者：邹小平 h.ABE T.ShIMIZU A.ANDO h.tokumoto 朱申敏周豪慎 Research Center for Sensor Technology Beijing Information Technology Institute Beijing 100101China Beijing Key Laboratory for Sensor Beijing 100101China Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST)1-1-1 HigashiTsukubaIbalaki 305-8562Japan Energy Electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST)1-1-1 UmezonoTsukubaIbalaki 305-8568Japan Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 HigashiTsukuba Ibalaki 305-8562 Japan Nano-electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono TsukubaIbalaki 305-8568 Japan Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Higashi Tsukuba Ibalaki 305-8562 Japan Nanotechnology Research Center Research Institute for Electronic Science Hokkaido University Sapporo 001-0021Japan Energy Electronics Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 UmezonoTsukubaIbalaki 305-8568Japan

Straight carbon nanotubes (CNTs) were achieved by simple thermal chemical vapor deposition(STCVD) catalyzed by Mo-Fe alloy catalyst on silica supporting substrate at 700℃. high-resolution transmission electron microscopy images show that the straight CNTs are well graphitized with no attached amorphous carbon. Mo-Fe alloy catalyst particles play a very crucial role in the growth of straight CNTs. The straight carbon nanotubes contain much less defects than the curved nanotubes and might have potential applications for nanoelectrical devices in the future. The simple synthesis of straight CNTs may have benefit for large-scale productions.

关键词：碳纳米管直管生长简易热化学汽相沉积 Mo-Fe合金催化剂

赤热石墨棒在乙醇中快速淬火制备多壁碳纳米管

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赤热石墨棒在乙醇中快速淬火制备多壁碳纳米管

赤热石墨棒在乙醇中快速淬火制备多壁碳纳米管

第十五届全国高技术陶瓷学术年会

作者：邹小平 h.Abe T.Shimizu A.Ando h.tokumoto 朱申敏周豪慎北京信息科技大学传感技术研究中心日本国立产业技术综合研究院纳米技术研究所日本国立产业技术综合研究院能量电子学研究所日本国立产业技术综合研究院纳米电子学研究所日本国立北海道大学电子科学研究所纳米技术研究中心

本文提出了一种采用将赤热石墨棒在乙醇中快速淬火制备多壁碳纳米管的方法,在无气氛保护以及没有任何催化剂辅助的情况下,采用赤热石墨棒在乙醇液体中快速淬火的方法制备了多壁碳纳米管,以及

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赤热石墨棒在乙醇中快速淬火制备多壁碳纳米管

赤热石墨棒在乙醇中快速淬火制备多壁碳纳米管

第六届中国功能材料及其应用学术会议

作者：邹小平 h.Abe T.Shimizu A.Ando h.tokumoto 朱申敏周豪慎北京信息工程学院传感技术研究中心日本国立产业技术综合研究院纳米技术研究所日本国立产业技术综合研究院纳米电子学研究所日本国立产业技术综合研究院能量电子学研究所

为了满足各种纳米电子学应用的需求,发展新的制备碳纳米管的方法引起人们特别的关注．最近,作者研究了乙醇催化化学气相沉积法来制备多壁碳纳米管．然而,这种方法需要使用金属催化剂,这使得产物中带有杂质．提出了一种采用将赤热石墨棒... 详细信息

为了满足各种纳米电子学应用的需求,发展新的制备碳纳米管的方法引起人们特别的关注．最近,作者研究了乙醇催化化学气相沉积法来制备多壁碳纳米管．然而,这种方法需要使用金属催化剂,这使得产物中带有杂质．提出了一种采用将赤热石墨棒在乙醇中快速淬火制备多壁碳纳米管的方法,利用这种方法制备的碳纳米管没有催化剂杂质．利用高分辨透射电子显微术对制备的碳纳米管进行了表征．实验结果表明,制备的产物是多壁碳纳米管．由于这种方法制备碳纳米管不需要催化剂,因此它是一种经济的制备碳纳米管的方法．

关键词：碳纳米管快速淬火石墨棒

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功能材料 2007年第A6期38卷 2327-2328页

作者：邹小平 h.Abe T．Shimizu A．Ando h.tokumoto 朱申敏周豪慎北京信息工程学院传感技术研究中心北京市传感器重点实验室北京100101 日本国立产业技术综合研究院纳米技术研究所日本筑波市茨城县日本国立产业技术综合研究院纳米电子学研究所日本筑波市茨城县日本国立北海道大学电子科学研究所纳米技术研究中心日本札幌市日本国立产业技术综合研究院能量电子学研究所日本筑波市茨城县

为了满足各种纳米电子学应用的需求，发展新的制备碳纳米管的方法引起人们特别的关注。最近，作者研究了乙醇催化化学气相沉积法来制备多壁碳纳米管。然而，这种方法需要使用金属催化剂，这使得产物中带有杂质。提出了一种采用将赤热石... 详细信息

为了满足各种纳米电子学应用的需求，发展新的制备碳纳米管的方法引起人们特别的关注。最近，作者研究了乙醇催化化学气相沉积法来制备多壁碳纳米管。然而，这种方法需要使用金属催化剂，这使得产物中带有杂质。提出了一种采用将赤热石墨棒在乙醇中快速淬火制备多壁碳纳米管的方法，利用这种方法制备的碳纳米管没有催化剂杂质。利用高分辨透射电子显微术对制备的碳纳米管进行了表征。实验结果表明，制备的产物是多壁碳纳米管。由于这种方法制备碳纳米管不需要催化剂，因此它是一种经济的制备碳纳米管的方法。

关键词：碳纳米管快速淬火石墨棒

Free vibration and buckling analysis of polymeric composite beams reinforced by functionally graded bamboo fbers

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Applied Mathematics and Mechanics(English Edition) 2024年第3期45卷 543-562页

作者： h.M.FEIZABAD M.h.YAS Department of Mechanical Engineering Razi UniversityKermanshah ***Iran

Natural fibers have been extensively researched as reinforcement materials in polymers on account of their environmental and economic advantages in comparison with synthetic fibers in the recent *** fibers are renowned for their good mechanical properties,abundance,and short cycle *** beams are one of the fundamental structural components and are susceptible to mechanical loads in engineering applications,this paper performs a study on the free vibration and buckling responses of bamboo fiber reinforced composite(BFRC)beams on the elastic *** different functionally graded(FG)layouts and a uniform one are the considered distributions for unidirectional long bamboo fibers across the *** elastic properties of the composite are determined with the law of *** hamilton’s principle,the governing equations of motion are *** generalized differential quadrature method(GDQM)is then applied to the equations to obtain the *** achieved outcomes exhibit that the natural frequency and buckling load values vary as the fiber volume fractions and distributions,elastic foundation stiffness values,and boundary conditions(BCs)and slenderness ratio of the beam ***,a comparative study is conducted between the derived analysis outcomes for BFRC and homogenous polymer beams to examine the effectiveness of bamboo fibers as reinforcement materials,demonstrating the significant enhancements in both vibration and buckling responses,with the exception of natural frequencies for cantilever beams on the Pasternak foundation with the FG-◇fiber ***,the obtained analysis results of BFRC beams are also compared with those for carbon nanotube reinforced composite(CNTRC)beams found in the literature,indicating that the buckling loads and natural frequencies of BFRC beams are lower than those of CNTRC beams.

关键词： bamboo fiber free vibration buckling analysis functionally graded(FG)beam elastic foundation generalized differential quadrature method(GDQM)

holographic dark energy in non-conserved gravity theory

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Communications in Theoretical Physics 2024年第4期76卷 126-133页

作者： h R Fazlollahi Institute of Gravitation and Cosmology Peoples Friendship University of Russia(RUDN University)6 Miklukho-Maklaya StMoscow117198Russia

Recently, reconsidering the Rastall idea T_(μ;νν)^(v)=α_(,μ) through relativistic thermodynamics gives a new form for the scalar field α which led us to construct modern modified theory of gravity debugged ‘non-conserved gravity theory’ Fazlollahi 2023 Euro. Phys. J. C 83 923. This theory unlike other modified theories of gravity cannot directly explain the current acceleration expansion in the absence of the cosmological constant and or existence of other forms of dark energy. hence, in this study we have reinvestigated holographic dark energy Ρ_(X)~h^(2) in the non-conserved theory of gravity. In this context, the density and pressure of dark energy depend on the non-conserved term and density of the dust matter field. As shown, due to non-conservation effects on large-scale structures, unlike the original holographic model, our model onsets an acceleration epoch for the current Universe satisfies observations. Moreover, the interaction and viscous scenarios are studied for this model.

关键词： non-conserved gravity covariant form of thermodynamics holographic dark energy

Convexification of hybrid AC-DC Optimal Power Flow with Line-Commutated Converters

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 617-628页

作者： hongyuan Liang Zhigang Li J.h.Zheng Q.h.Wu School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China

Line-commutated converter (LCC)-based high-voltage DC (hVDC) systems have been integrated with bulk AC power grids for interregional transmission of renewable power. The nonlinear LCC model brings additional nonconvexity to optimal power flow (OPF) of hybrid AC-DC power grids. A convexification method for the LCC station model could address such nonconvexity but has rarely been discussed. We devise an equivalent reformulation for classical LCC station models that facilitates second-order cone convex relaxation for the OPF of LCC-based AC-DC power grids. We also propose sufficient conditions for exactness of convex relaxation with its proof. Equivalence of the proposed LCC station models and properties, exactness, and effectiveness of convex relaxation are verified using four numerical simulations. Simulation results demonstrate a globally optimal solution of the original OPF can be efficiently obtained from relaxed model.

关键词： AC-DC power system convex relaxation linecommutated converter optimal power flow second-order cone programming

Shell-model representations of the microscopic version of the Bohr-Mottelson collective model

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Communications in Theoretical Physics 2024年第8期76卷 79-90页

作者： h G Ganev Joint Institute for Nuclear Research DubnaRussia Institute of Mechanics Bulgarian Academy of SciencesSofiaBulgaria

The structure of the irreducible collective spaces of the group Sp(12,R),which many-particle nuclear states are classified according to the chain Sp(12,R)⊃U(6)⊃SO(6)⊃SU_(pn)(3)⊗SO(2)⊃SO(3)of the proton-neutron symplectic model(PNSM),is considered in *** chain of the PNSM was recently shown to correspond to a microscopic shell-model version of the Bohr-Mottelson collective *** construction of the relevant shell-model representations of the Sp(12,R)group along this chain is considered for three nuclei with varying collective properties and from different mass *** is shown that the SU_(pn)(3)basis states of the Sp(12,R)representations belonging to the SO(6)irreps with seniorityυ≥υ0,withυ0 denoting the maximal seniority SO(6)irrep contained in the Sp(12,R)bandhead,are always Pauli allowed,but organized in a different way into different SO(6)*** is in contrast to the case of filling the levels of the standard three-dimensional harmonic oscillator and using the plethysm *** the SU_(pn)(3)multiplets withinυhe present work are important for the practical application of the microscopic version of the Bohr-Mottelson collective model.

关键词： microscopic shell-model version of the Bohr-Mottelson model proton-neutron symplectic model Sp(12,R)dynamical algebra shell-model representations

Marinoan glaciation in the Indian subcontinent——Anatomy and global implications

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Journal of Palaeogeography 2024年第2期13卷 293-308页

作者： h.N.Bhattacharya Department of Earth Sciences Techno India UniversityWest BengalSector VSalt LakeKolkata700091India

Detailed sedimentological analysis of the Pokaran Boulder Bed,representing the most basal unit of the Neoproterozoic-Lower Cambrian Marwar Supergroup,clearly indicates its glacial *** glacial sediments are interpreted as an ice-contact submarine fan *** on the detrital and inherited zircon population of the Marwar Supergroup sediments and interlayered pyroclastic deposits,a Marinoan cryochron of the Cryogenian Period is envisaged for the Pokaran Boulder *** well-preserved Ediacaran elements in the post-glacial sedimentary succession also support a Cryogenian to Early Cambrian age of the Marwar *** glacial deposition at the base of the Marwar Supergroup strengthens the regional correlation between the studied sediments with the Lesser himalayan Blaini-Krol-Tal sediments and the haqf Supergroup of *** available zircon ages and paleomagnetic data of the Malani Igneous suite,along with the Marinoan glacial deposits,detrital zircon ages,and Ediacaran fossil elements of the Marwar Supergroup add significant information to the Neoproterozoic Earth history.

关键词： Neoproterozoic Marinoan glaciation Diamictites Pokaran Boulder Bed Marwar Supergroup