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

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Fullerene Peapods and Double‐Wall Nanotubes: Structures and Optical Properties 富勒烯豆荚和双壁纳米管:结构和光学性质
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514084
H. Kataura, M. Abe, A. Fujiwara, T. Kodama, K. Kikuchi, Y. Misaki, S. Suzuki, Y. Achiba, Y. Maniwa
{"title":"Fullerene Peapods and Double‐Wall Nanotubes: Structures and Optical Properties","authors":"H. Kataura, M. Abe, A. Fujiwara, T. Kodama, K. Kikuchi, Y. Misaki, S. Suzuki, Y. Achiba, Y. Maniwa","doi":"10.1063/1.1514084","DOIUrl":"https://doi.org/10.1063/1.1514084","url":null,"abstract":"High‐yield fullerene‐peapods were synthesized by using diameter selected nanotubes. Filling factors of C60 and C70 were estimated from X‐ray diffraction analysis. The best filling is 100 % for C70‐peapods. Peapods were transformed to double‐wall nanotubes simply by heating in vacuum. Drastic spectral change in radial breathing modes and tangential modes were observed with an intensity drop in the conversion process. Limited number of radial breathing mode peaks originated from inner nanotubes was observed in resonance Raman spectra, which is consistent with a tight binding calculation of electronic band structure for thin nanotubes.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"2 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":"128409437","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: 3
Band structure and optical properties of isolated and bundled nanotubes 隔离和束状纳米管的能带结构和光学性质
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514140
S. Reich, C. Thomsen, P. Ordejón, D. Sánchez-Portal
{"title":"Band structure and optical properties of isolated and bundled nanotubes","authors":"S. Reich, C. Thomsen, P. Ordejón, D. Sánchez-Portal","doi":"10.1063/1.1514140","DOIUrl":"https://doi.org/10.1063/1.1514140","url":null,"abstract":"We studied the electronic band structure of isolated and bundled single‐walled nanotubes by ab initio calculations. Curvature effects on the electronic states depend on the chirality of the nanotube; the strongest deviations from the zone‐folding approximation are found in zig‐zag tubes. Bundling of the tubes to ropes further reduces the band gap in semiconducting tubes (20 – 30 %). We present first‐principles calculations of the optical absorption spectra in a (19,0) nanotube.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"123 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":"117324779","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
Mechanical cut of carbon nanotubes 碳纳米管的机械切割
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514083
K. Niesz, Z. Kónya, I. Vesselényi, A. Fonseca, J. Nagy, I. Kiricsi
{"title":"Mechanical cut of carbon nanotubes","authors":"K. Niesz, Z. Kónya, I. Vesselényi, A. Fonseca, J. Nagy, I. Kiricsi","doi":"10.1063/1.1514083","DOIUrl":"https://doi.org/10.1063/1.1514083","url":null,"abstract":"Ball milling technique is a very efficient way of breaking carbon nanotubes. After 100 hour grinding the length of the tubes decrease to 200–300 nm although the final material contains high‐density particles, thus further purification method is necessary. We present a purification method using KMnO4 to destruct the particles and form well separated nanotubes.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"25 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":"117154946","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
Photoconductivity and Local Transport Properties of Single‐Wall Carbon Nanotubes 单壁碳纳米管的光电导率和局部输运性质
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514115
A. Fujiwara, Y. Matsuoka, R. Iijima, H. Suematsu, N. Ogawa, K. Miyano, H. Kataura, Y. Maniwa, S. Suzuki, Y. Achiba
{"title":"Photoconductivity and Local Transport Properties of Single‐Wall Carbon Nanotubes","authors":"A. Fujiwara, Y. Matsuoka, R. Iijima, H. Suematsu, N. Ogawa, K. Miyano, H. Kataura, Y. Maniwa, S. Suzuki, Y. Achiba","doi":"10.1063/1.1514115","DOIUrl":"https://doi.org/10.1063/1.1514115","url":null,"abstract":"Photoconducting and local transport properties of single‐wall carbon nanotubes (SWNTs) have been investigated. Two peaks in the photoconductivity excitation spectra around 0.7 and 1.2 eV are observed at room temperature, which can be interpreted as a photocurrent in semiconducting SWNTs. From the local transport measurements on SWNT bundles by the combination of atomic force microscopy and scanning tunneling spectroscopy, we find current flows through each SWNT separately rather than uniformly in the bundle. The results show that we can extract the transport properties of semiconducting or metallic SWNTs from the mixture of both phases by photoconductivity measurements and the local transport measurements.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"49 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":"127143570","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
Boron Nitride Nanotube Peapods 氮化硼纳米管豆荚
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514092
A. Zettl, J. Cumings, W. Han, W. Mickelson
{"title":"Boron Nitride Nanotube Peapods","authors":"A. Zettl, J. Cumings, W. Han, W. Mickelson","doi":"10.1063/1.1514092","DOIUrl":"https://doi.org/10.1063/1.1514092","url":null,"abstract":"We demonstrate that boron nitride (BN) nanotubes can be filled “peapod” fashion with C60 molecules. Filling small‐diameter BN nanotubes results in a linear chain of C60 molecules in the interior, while filling large diameter BN nanotubes leads to nanorods of crystalline C60 in the interior. Electron beam damage can be used to fuse the encapsulated C60 molecules into carbon nanotubes, leading to carbon nanotubes encased within insulating BN nanotubes. BN nanotubes can also be synthesized with mobile magnetic nanocrystals within their core.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"44 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":"126695060","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: 7
Fluorine Effect on the Structure and Electrical Transport of Arc‐Produced Carbon Nanotubes 氟对电弧制备碳纳米管结构和电输运的影响
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514119
A. V. Okotrub, A. Romanenko, N. F. Yudanov, L. G. Bulusheva, I. Asanov, O. Anikeeva, A. Chuvilin, A. Boronin, J. Bonard
{"title":"Fluorine Effect on the Structure and Electrical Transport of Arc‐Produced Carbon Nanotubes","authors":"A. V. Okotrub, A. Romanenko, N. F. Yudanov, L. G. Bulusheva, I. Asanov, O. Anikeeva, A. Chuvilin, A. Boronin, J. Bonard","doi":"10.1063/1.1514119","DOIUrl":"https://doi.org/10.1063/1.1514119","url":null,"abstract":"The samples of multiwall carbon nanotubes (MWNTs) and single‐wall carbon nanotubes (SWNTs) produced in an electric arc were fluorinated using a mixture of Br2 and BrF3 at room temperature. Transmission electron microscopy showed that only several outer shells of MWNTs were fluorinated whereas the inner shells remained intact. The fluorination was found to cause the splitting of a SWNT rope. X‐ray photoelectron and infrared spectra indicated a similar character of C–F bonding in the materials produced. The electrical conductivity of the MWNT and SWNT samples is decreased with fluorination by four and three orders of magnitude respectively but retains the temperature dependence in the case of the former sample. The electrical transport in the fluorinated SWNT is characteristic of narrow‐gap semiconductors or semimetals with local disorder.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"391 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":"122783795","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: 3
Full three‐dimensional wave‐packet dynamical calculations of STM images of nanotube Y‐junctions 纳米管Y结STM图像的全三维波包动力学计算
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514145
G. I. Márk, L. Biró, J. Gyulai, Z. Kónya, P. Lambin
{"title":"Full three‐dimensional wave‐packet dynamical calculations of STM images of nanotube Y‐junctions","authors":"G. I. Márk, L. Biró, J. Gyulai, Z. Kónya, P. Lambin","doi":"10.1063/1.1514145","DOIUrl":"https://doi.org/10.1063/1.1514145","url":null,"abstract":"Due to their geometry and asymmetric transport properties, carbon nanotube Y‐junctions make it possible to create three‐terminal nanoelectronic devices and fully nanoscale device networks. To understand the propagation of electron waves in these nanoscopic “wave guides”, we have simulated the STM images of such systems by calculating the transversal propagation of electronic wave packets through an STM model. The STM tip acts as a local injection source, the variation of the probability density along the branches of the Y‐junction gives information about the wave packet reflections and localized states.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"633 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":"131193547","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
Electronic and structural properties of alkali doped SWNT 碱掺杂SWNT的电子和结构性质
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514118
N. Nemes, J. Fischer, K. Kamarás, D. Tanner, A. Rinzler
{"title":"Electronic and structural properties of alkali doped SWNT","authors":"N. Nemes, J. Fischer, K. Kamarás, D. Tanner, A. Rinzler","doi":"10.1063/1.1514118","DOIUrl":"https://doi.org/10.1063/1.1514118","url":null,"abstract":"Comprehensive experiments on structural and transport properties of alkali intercalated single walled carbon nanotubes (SWNT) are presented. The increasing electron density was measured as a shift of the Drude‐edge in optical reflectivity in‐situ with progressive doping. In saturation‐doped samples the Drude‐edge shifts into the visible (to 25,000 – 30,000 cm−1 for potassium and rubidium doped samples) and the samples have a golden‐brown color, similar to stage I graphite. X‐ray diffraction reveals a crystalline rope structure with expanded lattice constant, similar to results of Duclaux et al.. The change in the low temperature divergence of the resistivity after degassing at high temperature and high vacuum and after K‐doping is studied in‐situ.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"27 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":"133660888","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
Electrochemical lithium insertion into (MoS2)n nanotube bundles 电化学锂插入(MoS2)n纳米管束
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514197
R. Dominko, M. Gaberšček, P. Venturini, D. Arčon, A. Mrzel, M. Remškar, S. Pejovnik, D. Mihailovic
{"title":"Electrochemical lithium insertion into (MoS2)n nanotube bundles","authors":"R. Dominko, M. Gaberšček, P. Venturini, D. Arčon, A. Mrzel, M. Remškar, S. Pejovnik, D. Mihailovic","doi":"10.1063/1.1514197","DOIUrl":"https://doi.org/10.1063/1.1514197","url":null,"abstract":"It is shown that the (MoS2)n nanotube bundles are capable of reversible lithium insertion. Comparing its properties with layered MoS2, which has been used as a positive material in the Li‐ion batteries in the past [1], the new material shows promising improvements. The intercalation takes place close to the metallic lithium potential and during the insertion process, the potential decreases linearly with the amount of inserted lithium. In all, the system’s characteristics indicate that (MoS2)n nanotubes may be used as a negative electrode in rechargeable lithium batteries with some potential advantages over other systems currently in use.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"2 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":"129429945","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
Carbon Nanotubes As Scanning Probe Tips 碳纳米管作为扫描探针尖端
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514195
M. Milas, R. Foschia, A. Kulik, R. Gaal, E. Ljubović, L. Forró
{"title":"Carbon Nanotubes As Scanning Probe Tips","authors":"M. Milas, R. Foschia, A. Kulik, R. Gaal, E. Ljubović, L. Forró","doi":"10.1063/1.1514195","DOIUrl":"https://doi.org/10.1063/1.1514195","url":null,"abstract":"We have constructed a device for manipulating carbon nanotubes inside a transmission electron microscope. This setup allows us to select an individual nanotube of our choice and to attach it to an AFM probe tip. This way we obtain a tool which is useful for diverse applications. It can be used as a “classical AFM probe” yet with enhanced resolution due to the small size of the nanotube ending and mechanical properties of carbon nanotubes. Employing a conductive layer as “glue” between the nanotube and the probe enables us to make transport measurements on a single nanotube. Biasing the nanotube, electron and light emission occurs at the tip of the nanotube. This light emission is the basis of constructing a Scanning Near‐field Optical Microscope (SNOM) with carbon nanotubes.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"633 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":"129632120","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: 3
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