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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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Fulleropyrrolidine‐phthalocyanine: A New Molecule for Solar Energy Conversion 富勒吡咯烷-酞菁:一种新的太阳能转换分子
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514168
M. Loi, P. Denk, H. Neugebauer, C. Brabec, N. S. Sariciftci, Andreas Gouloumis, P. Vázquez, T. Torres
{"title":"Fulleropyrrolidine‐phthalocyanine: A New Molecule for Solar Energy Conversion","authors":"M. Loi, P. Denk, H. Neugebauer, C. Brabec, N. S. Sariciftci, Andreas Gouloumis, P. Vázquez, T. Torres","doi":"10.1063/1.1514168","DOIUrl":"https://doi.org/10.1063/1.1514168","url":null,"abstract":"We report on photophysical properties of a novel dyad molecule having as antenna/donor a Zn‐phthalocyanine derivative and as acceptor a C60 derivative covalently attached. We found evidence for long living photoinduced electron transfer in solid state. Photovoltaic devices using films of fulleropyrrolidine‐phthalocyanine dyad were built and characterized.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"15 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":"122419524","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
Pressure and polarization‐angle dependent Raman spectra of aligned single‐wall carbon nanotubes in AlPO4‐5 crystal channels AlPO4 - 5晶体通道中排列单壁碳纳米管的压力和极化角依赖拉曼光谱
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514125
P. Rafailov, J. Maultzsch, M. Machoň, S. Reich, C. Thomsen, Zikang Tang, Z. M. Li, I. Li
{"title":"Pressure and polarization‐angle dependent Raman spectra of aligned single‐wall carbon nanotubes in AlPO4‐5 crystal channels","authors":"P. Rafailov, J. Maultzsch, M. Machoň, S. Reich, C. Thomsen, Zikang Tang, Z. M. Li, I. Li","doi":"10.1063/1.1514125","DOIUrl":"https://doi.org/10.1063/1.1514125","url":null,"abstract":"We investigated aligned single‐wall carbon nanotubes (SWNTs) with small diameters (≈ 4A) grown in AlPO4‐5 crystal channels. The phonon frequencies of the band at ≈ 1600 cm−1 were studied as a function of applied external pressure. We analyze the obtained pressure dependences in terms of the elastic continuum model. Polarized Raman spectra at different wavelengths were taken at different angles of the electric field polarization vector with respect to the nanotube axis. We found the scattering intensity to be at maximum for laser light polarized parallel to the channel direction while it is highly suppressed for polarization perpendicular to the channels. This is consistent with a resonant absorption as a first step in the Raman scattering process and only A1(g) symmetry scattering.","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":"122536744","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
Combined Experimental and Numerical Study of Parameters Controlling C‐SWNTs (HNT) Synthesis via Laser Vaporization 激光汽化合成碳纳米管(HNT)控制参数的实验与数值结合研究
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514146
M. Castignolles, A. Foutel-Richard, A. Mavel, J. Cochon, D. Pigache, Annick Loiseau, P. Bernier
{"title":"Combined Experimental and Numerical Study of Parameters Controlling C‐SWNTs (HNT) Synthesis via Laser Vaporization","authors":"M. Castignolles, A. Foutel-Richard, A. Mavel, J. Cochon, D. Pigache, Annick Loiseau, P. Bernier","doi":"10.1063/1.1514146","DOIUrl":"https://doi.org/10.1063/1.1514146","url":null,"abstract":"We present here a summary of the study of the synthesis route based on the vaporization induced by a continuous CO2 laser that we have developed. We have combined soot characterizations, temperature measurements of the buffer gas, and simulations of the flow fields of the buffer gas. Results are analyzed with the help of the phenomenological model of nucleation and growth process proposed in [1,2]. It is shown that the synthesis yield is controlled by three parameters: the cooling rate at high temperature where the catalyst particles are formed, the residence time and the temperature in the temperature range (in between 1000 K and 2100 K) where the nanotubes nucleate and grow. Adjustment of these parameters can be achieved via an optimization of the synthesis parameters with the help of the simulations of the gas flow fields.","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":"125470090","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
Ropes of Carbon Nanotube Intramolecular Junctions 碳纳米管分子内结的绳索
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514175
A. Hassanien, M. Holzinger, A. Hirsch, P. Venturini, A. Prodan, M. Tokumoto, P. Bernier
{"title":"Ropes of Carbon Nanotube Intramolecular Junctions","authors":"A. Hassanien, M. Holzinger, A. Hirsch, P. Venturini, A. Prodan, M. Tokumoto, P. Bernier","doi":"10.1063/1.1514175","DOIUrl":"https://doi.org/10.1063/1.1514175","url":null,"abstract":"We report on structural and electronic property investigation of single‐wall carbon nanotube intramolecular junctions (SWCNTIMJ) at room temperature. We find many of the junctions are mainly condensed in ropes of diameter 500 nm and length of 1–3 micron. Each junction is characterized as two segments, with different diameters and/or chiralities, seamlessly joined to form a kink of 0° to 45°. Atomically resolved scanning tunneling spectroscopy measurements verify that each segment can be either metallic (m) or semiconducting (Sc). Armchair‐zigzag, (M‐S) type, seem to be the most dominant junctions in our arc discharge samples. The existence of a relatively large amount of these junctions may raise hope that a control of nanotube growth might be close to reality.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"118 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":"128164054","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
Filling of multiwalled carbon nanotubes with oxides and metals 用氧化物和金属填充多壁碳纳米管
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514090
J. Chancolon, F. Archaimbault, S. Delpeux, A. Pineau, M. Saboungi, S. Bonnamy
{"title":"Filling of multiwalled carbon nanotubes with oxides and metals","authors":"J. Chancolon, F. Archaimbault, S. Delpeux, A. Pineau, M. Saboungi, S. Bonnamy","doi":"10.1063/1.1514090","DOIUrl":"https://doi.org/10.1063/1.1514090","url":null,"abstract":"The search for new materials leads to the creation of nanocomposite structures, such as oxide or metal‐filled MWNTs, offering the possibility to enhance, on a nanometric scale, the physical properties of both the encapsulated and encapsulating materials. In the present study, MWNTs are synthesized by catalytic decomposition of acetylene and using a template method, filled with transition metal oxides (V, Mn, Fe, Mo, Bi) or semi‐metals (Se) to study the restricted crystallization behaviour of the encapsulates due to filling. For transition metal oxides, a one‐step filling chemical method was used, where nanotubes are treated with refluxing nitric acid containing a soluble metal nitrate. The corresponding metal oxide is obtained by calcination of the dried insoluble material. For open nanotubes, this method was compared with a filling via capillary action using molten media. Filling rates from 10 to 20 % were observed with all the oxides and the products consisted either of aggregates (Fe2O3) or continuous ...","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"46 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":"133750436","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
New Data on the Formation of SWNTs by the Electrical Arc Method 电弧法形成单壁碳纳米管的新数据
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514101
M. Monthioux, M. Pacheco, H. Allouche, M. Razafinimanana, N. Caprais, L. Donadieu, A. Gleizes
{"title":"New Data on the Formation of SWNTs by the Electrical Arc Method","authors":"M. Monthioux, M. Pacheco, H. Allouche, M. Razafinimanana, N. Caprais, L. Donadieu, A. Gleizes","doi":"10.1063/1.1514101","DOIUrl":"https://doi.org/10.1063/1.1514101","url":null,"abstract":"The formation of single‐wall carbon nanotubes (SWNTs) and other carbon nanophases by the electric arc method was investigated by transmission electron microscopy for various conditions while studying the plasma characteristics (temperature profiles, C2 concentration) by in‐situ emission spectroscopy. Special attention was brought to the anode type, which has not been a thoroughly studied parameter so far. Related parameters were the dispersion of the catalyst (homogeneous or heterogeneous) and the doping with non catalyst phases. Conditions have been found which are able to produce preferentially either SWNTs, or double‐wall nanotubes (DWNTs), or single wall nanocapsules (SWNCs). Focussing on the formation of SWNTs, we also determined arc conditions where web production is increased by up to ∼230% compared to standard conditions. Impurities are only catalyst remnants and amorphous ‐ or nearly ‐ carbon, suggesting that acid‐based purification procedures could be simplified and less severe, with both higher efficiency and lower harmfulness towards SWNT structure. Investigation of the plasma provided interesting results which emphasise the role of the primary structure of the active carbon moieties generated by the anode vaporisation. The unexpected minimisation of the role of C2 in the SWNT growth mechanism is one of the results.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"33 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":"132144393","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
Electronic‐Magnetic Properties of Monolayers of Chiral Bio‐organic Molecules 手性有机生物分子单分子层的电磁特性研究
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514162
I. Carmeli, V. Skákalová, R. Naaman, Z. Vager
{"title":"Electronic‐Magnetic Properties of Monolayers of Chiral Bio‐organic Molecules","authors":"I. Carmeli, V. Skákalová, R. Naaman, Z. Vager","doi":"10.1063/1.1514162","DOIUrl":"https://doi.org/10.1063/1.1514162","url":null,"abstract":"Measurements of the spin‐correlated transmission of electrons through organized monolayers of polypeptide helices, absorbed on gold substrate, show high spin selectivity. The direction of the magnetic moment of the layer depends on the handedness of the helix molecule and on the direction of their dipole moment with respect to the metal substrate.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"35 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":"133109823","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
Intershell Conductance of Multiwalled Carbon Nanotubes 多壁碳纳米管的壳间电导
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514110
P. Collins, P. Avouris
{"title":"Intershell Conductance of Multiwalled Carbon Nanotubes","authors":"P. Collins, P. Avouris","doi":"10.1063/1.1514110","DOIUrl":"https://doi.org/10.1063/1.1514110","url":null,"abstract":"Multiprobe electrical transport measurements on individual multiwalled carbon nanotubes (MWNTs) are described. Using a method by which single carbon shells can be removed from a MWNT [1,2], the intershell contributions to the conductance can be separated from the intrashell contributions. This measurement directly probes the electronic coupling between shells, and clearly demonstrates the Arrhenius temperature dependence of this coupling.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"21 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":"115488909","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
Synthesis and Properties of Alkali Metal Intercalated Fullerene‐like MS2 (M=W,Mo) Nanoparticles 碱金属插层类富勒烯MS2 (M=W,Mo)纳米粒子的合成与性能
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514076
A. Zak, Y. Feldman, V. Lyakhovitskaya, G. Leitus, R. Popovitz‐Biro, E. Wachtel, H. Cohen, S. Reich, R. Tenne
{"title":"Synthesis and Properties of Alkali Metal Intercalated Fullerene‐like MS2 (M=W,Mo) Nanoparticles","authors":"A. Zak, Y. Feldman, V. Lyakhovitskaya, G. Leitus, R. Popovitz‐Biro, E. Wachtel, H. Cohen, S. Reich, R. Tenne","doi":"10.1063/1.1514076","DOIUrl":"https://doi.org/10.1063/1.1514076","url":null,"abstract":"Layered metal disulfides ‐ MoS2 and WS2 in the form of fullerene‐like (IF) nanoparticles and in the form of platelets (crystallites of the 2H polytype) have been intercalated by exposure to alkali metal (potassium and sodium) vapor using a two‐zone transport method. The composition of the intercalated systems was established using X‐ray energy dispersive spectrometer (EDS) and X‐ray photoelectron spectroscopy (XPS). X‐ray powder diffraction (XRD) analysis and transmission electron microscopy (TEM) of the samples, which were not exposed to the ambient atmosphere, showed that they suffered little change in their lattice parameters. On the other hand, after exposure to ambient atmosphere, substantial increase in the interplanar spacing (3–5 A) was observed for the intercalated phases. Insertion of one to two water molecules per intercalated metal atom was suggested as a possible explanation for this large expansion along the c‐axis. The modifications in magnetic and transport properties of the intercalated materials were investigated, and are believed to occur via charge transfer from the alkali metal to the conduction band of the host lattice. Restacking of the MS2 layers after prolonged exposure to the atmosphere and recovery of the pristine compound properties were observed as a result of deintercalation of the metal atoms.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"65 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":"124210627","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
NMR investigations of hydrogen in carbon nanotubes 碳纳米管中氢的核磁共振研究
Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials Pub Date : 2002-10-02 DOI: 10.1063/1.1514190
M. Schmid, C. Goze-Bac, S. Krämer, M. Mehring, S. Roth, P. Bernier
{"title":"NMR investigations of hydrogen in carbon nanotubes","authors":"M. Schmid, C. Goze-Bac, S. Krämer, M. Mehring, S. Roth, P. Bernier","doi":"10.1063/1.1514190","DOIUrl":"https://doi.org/10.1063/1.1514190","url":null,"abstract":"We report proton nuclear magnetic resonance (1H‐NMR) measurements on hydrogen loaded single walled carbon nanotubes. The carbon nanotubes were produced with different kinds of catalysts and hydrogen loaded under 23 bar hydrogen pressure. The hydrogen adsorption properties of the carbon nanotube materials were investigated by temperature dependent analysis of the 1H‐NMR spectra.","PeriodicalId":196292,"journal":{"name":"Structural and Electronic Properties of Molecular Nanostructures. XVI International Winterschool on Electronic Properties of Novel Materials","volume":"13 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":"125018475","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
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