发布求助
文献互助 智能选刊 最新文献

Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials最新文献

筛选
英文 中文
Photo‐Induced Tunneling Current in Single‐Wall Carbon Nanotubes investigated by Scanning Tunneling Spectroscopy 扫描隧道光谱法研究单壁碳纳米管的光诱导隧道电流
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514132
S. Kazaoui, S. Mandal, N. Minami
{"title":"Photo‐Induced Tunneling Current in Single‐Wall Carbon Nanotubes investigated by Scanning Tunneling Spectroscopy","authors":"S. Kazaoui, S. Mandal, N. Minami","doi":"10.1063/1.1514132","DOIUrl":"https://doi.org/10.1063/1.1514132","url":null,"abstract":"The electronic properties of single‐wall carbon nanotubes (SWCNT) under light excitation were investigated by scanning tunneling microscopy and spectroscopy (STM/STS), since this technique allows both imaging and probing individual nanotubes. A photo‐induced tunneling current (PITC) was observed for semiconducting and metallic SWNT only when the excitation energy exceeds the 1st pairs of van Hove singularity in the density of state. Moreover, the PITC effect occurs at both positive and negative sample bias, increases linearly with the light intensity and is reversible. Further experiments are in progress to elucidate the mechanism of PITC and to ultimately reveal the photoconductivity response of individual SWCNT.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127227633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multiwall carbon nanotubes as substrates for the growth of unique pyrolytic carbon morphologies 多壁碳纳米管作为生长基质的独特热解碳形态
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514094
H. Allouche, M. Monthioux, T. Ondarçuhu, R. Jacobsen
{"title":"Multiwall carbon nanotubes as substrates for the growth of unique pyrolytic carbon morphologies","authors":"H. Allouche, M. Monthioux, T. Ondarçuhu, R. Jacobsen","doi":"10.1063/1.1514094","DOIUrl":"https://doi.org/10.1063/1.1514094","url":null,"abstract":"Multiwall carbon nanotubes were first prepared by thermocatalytic decomposition of methane in the presence of hydrogen over iron nanoparticles. Then pyrolytic carbon deposition was achieved onto the MWNTs by thermal cracking of a mixture CH4/H2. Peculiar MWNTs‐based morphologies were obtained, which basically associate sequences of beads and cones inside which the graphene display is always concentric to the MWNTs, with a variable nanotexture. Temperature and gas phase composition may vary so that a whole range of morphologies can be obtained, characterised by the variable development of the beads from absent to more or less elongated grains and that of the cones from fully developed to truncated. The formation of each morphology is quite controllable. Growth mechanisms are assumed to be related to the energetics of a liquid polycondensed phase issued from the cracking of CH4 deposited onto a nano‐sized wire. Various interesting applications are expected, such as AFM tips or composite reinforcement.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127381751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
One‐dimensional superconductivity of 0.4 nm single‐wall carbon nanotubes 0.4 nm单壁碳纳米管的一维超导性
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514112
Zikang Tang, Lixia Zhang, Ning Wang, Z. M. Li, Xixiang Zhang, Jiannong Wang, C. Chan, P. Sheng
{"title":"One‐dimensional superconductivity of 0.4 nm single‐wall carbon nanotubes","authors":"Zikang Tang, Lixia Zhang, Ning Wang, Z. M. Li, Xixiang Zhang, Jiannong Wang, C. Chan, P. Sheng","doi":"10.1063/1.1514112","DOIUrl":"https://doi.org/10.1063/1.1514112","url":null,"abstract":"Mono‐sized ultra‐small (0.4 nm in diameter) single‐walled carbon nanotubes (SWNTs) were prepared by pyrolysis of tripropylamine molecules in the channels of porous zeolite AlPO4‐5 (AFI) single crystals. These ultra‐small nanotubes perhaps constitute the best example of one‐dimensional (1D) quantum wires. Because these SWNTs are highly aligned and uniform in size, they show interesting electrical transport properties. Local density functional calculations indicate that when the diameter of the SWNT is smaller than 0.5 nm, strong curvature effects induce strong σ‐π mixing of the unoccupied orbitals. In this regime, metallicity can no longer be predicted by the simple band‐folding picture, and these small‐radius SWNTs generally have finite density of states at the Fermi level. Investigation of the magnetic and transport properties of these SWNTs revealed that at temperatures below 20 K, the 0.4nm tubes exhibit superconducting behavior manifest as an anisotropic Meissner effect, with a superconducting gap and...","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124804665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Synthesis, Isolation and Characterisation of New Alkaline Earth Endohedral Fullerenes M@Cn (M = Ca, Sr; n = 74, 76) 新型碱土内嵌富勒烯的合成、分离与表征M@Cn (M = Ca, Sr)N = 74,76)
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514067
A. Grupp, Oliver Haufe, M. Jansen, M. Mehring, M. Panthöfer, J. Rahmer, A. Reich, M. Rieger, X. Wei
{"title":"Synthesis, Isolation and Characterisation of New Alkaline Earth Endohedral Fullerenes M@Cn (M = Ca, Sr; n = 74, 76)","authors":"A. Grupp, Oliver Haufe, M. Jansen, M. Mehring, M. Panthöfer, J. Rahmer, A. Reich, M. Rieger, X. Wei","doi":"10.1063/1.1514067","DOIUrl":"https://doi.org/10.1063/1.1514067","url":null,"abstract":"New alkaline earth endohedral Fullerenes M@Cn (M = Ca, Sr; n = 74, 76), prepared by means of the RF‐method, have been isolated by HPLC and characterised by means of mass, Raman, VIS‐NIR and photo‐excited triplet‐state ESR spectroscopy. The experimental findings are compared with the results of quantum‐chemical investigations.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124930116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Spectroscopy and Dynamics of Giant PAH’s: from Molecules to Nano‐structured Carbon Materials 巨多环芳烃的光谱学和动力学:从分子到纳米结构碳材料
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514148
C. Castiglioni, F. Negri, M. Tommasini, E. Donato, G. Zerbi
{"title":"Spectroscopy and Dynamics of Giant PAH’s: from Molecules to Nano‐structured Carbon Materials","authors":"C. Castiglioni, F. Negri, M. Tommasini, E. Donato, G. Zerbi","doi":"10.1063/1.1514148","DOIUrl":"https://doi.org/10.1063/1.1514148","url":null,"abstract":"Some recent results are presented based on a “molecular” approach to the study and the prediction of the structural and spectroscopic characteristics of nanostructured graphitic materials. QCFF/PI Quantum Chemical calculations have been performed on several polycyclic aromatic hydrocarbons (PAHs) of different and well defined structure and size. This study identifies peculiar structural characteristics of PAHs, originating from the confinement of π electrons. These characteristics are directly related to the features observed in their Raman spectra. On this basis the Raman response of a disordered carbon material containing nanosized graphitic domains has been computed.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"75 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116564357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Electrochemical Functionalization of Individual Single-Wall Carbon Nanotubes 单个单壁碳纳米管的电化学功能化
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514078
M. Burghard, S. Kooi, U. Schlecht, K. Balasubramanian, K. Kern
{"title":"Electrochemical Functionalization of Individual Single-Wall Carbon Nanotubes","authors":"M. Burghard, S. Kooi, U. Schlecht, K. Balasubramanian, K. Kern","doi":"10.1063/1.1514078","DOIUrl":"https://doi.org/10.1063/1.1514078","url":null,"abstract":"An electrochemical method is applied to attach functional groups to individual single‐wall carbon nanotubes. This approach allows both the reductive and oxidative coupling of substituted phenyl groups. Due to polymerization of the reactive species formed at the nanotube/electrolyte interface, coatings with a thickness of up to 20 nm are obtained. The thickness of the deposited layer can be effectively controlled by the magnitude and duration of the potential applied. By choosing appropriate additional substituents in the coupling reagent, the presented method offers the possibility to tune the surface properties of the modified nanotubes over a wide range.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122123530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Parametric study of nanotube growth from C2H2 and C60 on supported iron catalyst particles C2H2和C60在负载铁催化剂颗粒上生长纳米管的参数研究
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514102
R. Morjan, O. Nerushev, M. Sveningsson, L. Falk, F. Rohmund, E. Campbell
{"title":"Parametric study of nanotube growth from C2H2 and C60 on supported iron catalyst particles","authors":"R. Morjan, O. Nerushev, M. Sveningsson, L. Falk, F. Rohmund, E. Campbell","doi":"10.1063/1.1514102","DOIUrl":"https://doi.org/10.1063/1.1514102","url":null,"abstract":"CVD growth of nanotubes from two carbon feedstock gases C2H2 and C60, is facilitated by correlating two important parameters: size distribution of catalytic iron particles and temperature. The thickness of catalytic iron films deposited on Si substrates was controlled between 0.5 and 20nm. The annealed iron films were imaged with atomic force microscopy showing the distribution of iron particles. It was found that with increasing film thickness, both the particle diameter and height increase. After this treatment of the Si substrates, nanotube growth was performed at various temperatures between 550°–1100°C. The mean nanotube diameters remain constant while the nanotube growth rate depends on temperature. The density of CNT formation is temperature dependent. The presence of SWNT was observed at high temperatures (850°–950°C). SEM, TEM and Raman spectroscopy were used for sample analysis.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117009423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Magnetic Systems with Carbon Nanotubes 碳纳米管磁性系统
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514188
B. Zhao, R. Kozhuharova, T. Mühl, I. Mönch, H. Vinzelberg, M. Ritschel, A. Graff, M. Huhle, H. Lichte, C. Schneider
{"title":"Magnetic Systems with Carbon Nanotubes","authors":"B. Zhao, R. Kozhuharova, T. Mühl, I. Mönch, H. Vinzelberg, M. Ritschel, A. Graff, M. Huhle, H. Lichte, C. Schneider","doi":"10.1063/1.1514188","DOIUrl":"https://doi.org/10.1063/1.1514188","url":null,"abstract":"We report on mesoscopic magnetic devices and structures realized on the basis of multiwalled Carbon nanotubes. The nanotubes serve either as conducting lines between ferromagnetic terminals or as a container for ferromagnetic nanowires. Spin‐conserving transport through the nanotubes can be established over distances of several 100 nm and gives rise to large magnetotransport effects with resistance changes between 30% and 60% at 4.2 K. CVD growth of multiwall Carbon nanotubes in the presence of a suitable metallorganic agent containing Fe, Co, or Ni results in a filling of the tubes with nanocrystalline metallic wires which are found to behave ferromagnetically even at room temperature.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129411779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Intrinsic Superconductivity in Ropes of Carbon Nanotubes 碳纳米管束的本征超导性
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514113
M. Kociak, A. Kasumov, S. Guéron, B. Reulet, H. Bouchiat
{"title":"Intrinsic Superconductivity in Ropes of Carbon Nanotubes","authors":"M. Kociak, A. Kasumov, S. Guéron, B. Reulet, H. Bouchiat","doi":"10.1063/1.1514113","DOIUrl":"https://doi.org/10.1063/1.1514113","url":null,"abstract":"We have developed a technique for measuring transport measurements on carbon nanotubes at very low temperature. Carbon nanotubes are connected through low contact resistance to metallic pads. It has been possible to observe intrinsic superconductivity in ropes of single wall carbon nanotubes mounted on normal contacts provided that the distance between the normal electrodes is large enough, otherwise superconductivity is destroyed by proximity effect. These experiments indicate the presence of attractive interactions in carbon nanotubes which overcome coulomb repulsive interactions at low temperature.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129946980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Transformation of solid C70 into nanotubes 固体C70转化为纳米管
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514169
V. Blank, L. Chernozatonskii, G. Dubitsky, B. Mavrin, A. Sabirov, N. Serebryanaya
{"title":"Transformation of solid C70 into nanotubes","authors":"V. Blank, L. Chernozatonskii, G. Dubitsky, B. Mavrin, A. Sabirov, N. Serebryanaya","doi":"10.1063/1.1514169","DOIUrl":"https://doi.org/10.1063/1.1514169","url":null,"abstract":"Transformations of C70 fullerite materials under high pressure (up to 15 GPa) and temperature (up to 1720 K) influence are studied. The crystal structures of polymeric hard forms of C70 material have been studied by X‐ray powder diffraction. We have supposed new polymer phases of C70 during this treatment: precursor phase (under low pressure up to 9 GPa, temperature up to 600 K), chains (up to 12 GPa, 570K), phase of mixture of 3D polymerized C70 and nanotube fragments transformed from chains (high pressure up to 15 GPa, high temperature up to 1720 K).","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129278183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信