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《Chemphyschem》2003,4(11):1171-1176
Nanotubes have an outstanding potential both for applications in nanotechnology and as the subject of basic research. Wetting of porous templates is a simple technique that overcomes many limitations of established preparation methods. It extends the range of processable materials, for example, by a broad range of multicomponent mixtures or by high‐performance polymers such as poly(oxy‐1,4‐phenyleneoxy‐1,4‐phenylenecarbonyl‐1,4‐phenylene) (PEEK) and polytetrafluoroethylene (PTFE). Inducing controlled phase transitions generates a large specific surface, a specific nanoporosity, or oriented crystalline domains within the nanotube walls. Template wetting provides customized nanotubes and allows us to investigate how the wall curvature affects the structure formation. 相似文献
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Template Synthesis of Linear‐Chain Nanodiamonds Inside Carbon Nanotubes from Bridgehead‐Halogenated Diamantane Precursors 下载免费PDF全文
Yusuke Nakanishi Dr. Haruka Omachi Dr. Natalie A. Fokina Prof. Dr. Peter R. Schreiner Prof. Dr. Ryo Kitaura Dr. Jeremy E. P. Dahl Prof. Dr. Robert M. K. Carlson Prof. Dr. Hisanori Shinohara 《Angewandte Chemie (International ed. in English)》2015,54(37):10802-10806
A simple method for the synthesis of linear‐chain diamond‐like nanomaterials, so‐called diamantane polymers, is described. This synthetic approach is primarily based on a template reaction of dihalogen‐substituted diamantane precursors in the hollow cavities of carbon nanotubes. Under high vacuum and in the presence of Fe nanocatalyst particles, the dehalogenated radical intermediates spontaneously form linear polymer chains within the carbon nanotubes. Transmission electron microscopy reveals the formation of well‐aligned linear polymers. We expect that the present template‐based approach will enable the synthesis of a diverse range of linear‐chain polymers by choosing various precursor molecules. The present technique may offer a new strategy for the design and synthesis of one‐dimensional nanomaterials. 相似文献
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无机材料的微观结构决定了材料的许多特性,如传输行为、催化活性、分离效率、粘附、储存和释放动力学。具有管状结构纳米尺度的材料由于其特殊的结构及由此带来的特殊性能正成为一个令人兴奋的化学研究领域。文章综述了近年来无机纳米管材料的合成途径和进展。 相似文献
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Yuto Enomoto Dr. Motofusa Akiyama Dr. Yoshitsugu Morita Prof. Dr. Teruyuki Komatsu 《化学:亚洲杂志》2021,16(24):4057-4061
Anticancer agent doxorubicin-loaded liposomes (DoxLs) were drawn spontaneously into nanotubes comprising multilayers of polyelectrolytes and gold nanoparticles (PAuNTs). We describe a unique structure of PAuNTs incorporating DoxLs (DoxL-PAuNT). The number of DoxLs adsorbed on the tube interior surface was ascertained as 2.4×103. Heating stimuli engendered gel-liquid crystal phase transition of DoxL in the capillary, subsequently inducing efficient release of Dox without structural changes of the tubule or liposome. Furthermore, antitumor activity of the DoxL-PAuNTs on cancer cells was elucidated. 相似文献
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Palladium Nanotubes Formed by Lipid Tubule Templating and Their Application in Ethanol Electrocatalysis 下载免费PDF全文
Yinan Wang Shenghua Ma Yingchun Su Prof. Xiaojun Han 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(16):6084-6089
Palladium nanotubes were fabricated by using lipid tubules as templates for the first time in a controlled manner. The positively charged lipid 1,2‐dioleoyl‐3‐trimethylammoniumpropane (DOTAP) was doped into lipid tubules to adsorb PdCl42? on the tubule surfaces for further reduction. The lipid tubule formation was optimized by studying the growing dynamics and ethanol/water ratio. The DOTAP‐doped tubules showed pH stability from 0 to 14, which makes them ideal templates for metal plating. The Pd nanotubes are open‐ended with a tunable wall thickness. They exhibited good electrocatalytic performance in ethanol. Their electrochemically active surface areas were 6.5, 10.6, and 83.2 m2 g?1 for Pd nanotubes with 77, 101, and 150 nm wall thickness, respectively. These Pd nanotubes have great potential in fuel cells. The method demonstrated also opens up a way to synthesize hollow metal nanotubes. 相似文献
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Ronen Kreizman Sung You Hong Jeremy Sloan Dr. Ronit Popovitz‐Biro Dr. Ana Albu‐Yaron Dr. Gerard Tobias Dr. Belén Ballesteros Dr. Benjamin G. Davis Prof. Malcolm L. H. Green Prof. Reshef Tenne Prof. 《Angewandte Chemie (International ed. in English)》2009,48(7):1230-1233
Multiwall WS 2 nanotube templates were used as hosts to prepare core–shell PbI2@WS2 nanotubes by a capillary‐wetting method. Conformal growth of PbI2 layers on the inner wall of the relatively wide WS2 nanotubes (i.d. ca. 10 nm) leads to nanotubular structures which were not previously observed in narrow carbon nanotube templates. Image simulation after structural modeling (see picture) showed good agreement with the experimental HRTEM image.
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Hierarchical Porous ZnMn2O4 Hollow Nanotubes with Enhanced Lithium Storage toward Lithium‐Ion Batteries 下载免费PDF全文
Longhai Zhang Siqi Zhu Hui Cao Prof. Linrui Hou Prof. Changzhou Yuan 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(30):10771-10777
We have purposefully developed a smart template‐engaged methodology to efficiently fabricate well‐defined ternary spinel ZnMn2O4 hollow nanotubes (NTs). The procedure involves coating carbon nanotubes (CNTs) with ZnMn2O4 nanosheets (NSs), followed by heating at high temperature in air to oxidize the CNT template. Physicochemical characterization demonstrated that the formed ZnMn2O4 NTs with a diameter of approximately 100 nm were composed of assembled NSs and/or nanoparticles (NPs) as building blocks and possessed numerous nanopores of several nanometers in the sidewall of the NTs. In favor of the intrinsic structural advantages, the resulting ZnMn2O4 NTs exhibited superior electrochemical lithium‐storage performance with a large capacity, good rate behavior, and excellent cyclability when evaluated as promising anodes for lithium‐ion batteries (LIBs). The remarkable electrochemical performance was rationally ascribed to the appealing one‐dimensional (1D) porous hollow tubular architecture with nanoscale subunits and mesopores in the sidewalls, which decreased the diffusion length for the Li+ ions, improved the kinetic process, and enhanced the structural integrity with sufficient void space to tolerate the volume variation during Li+‐ion insertion/extraction. These results highlight the promising application of 1D ZnMn2O4 NTs as anodes for high‐performance LIBs. 相似文献
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Shuli Yin Dr. Hongjing Wang Kai Deng Zechuan Dai Dr. Ziqiang Wang Dr. You Xu Prof. Xiaonian Li Dr. Hairong Xue Prof. Liang Wang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(20):5316-5321
High surface area and fast mass transport rate are important to enhance the activity and stability of catalysts. In this work, tellurium nanowires and F127 triblock copolymer are used as self-sacrificial and soft templates, respectively, to synthesize PtRuTe mesoporous nanotubes (MNTs). The designed PtRuTe MNTs show uniformly distributed mesopores and an internally hollow structure, which can effectively improve Pt utilization, the catalytic activity and durability, and CO tolerance for the methanol oxidation reaction. Very different from previous 1D metallic catalysts with solid interiors and smooth surfaces, PtRuTe MNTs are unique, with a mesoporous exterior and hollow interior. The facile route presented herein is very feasible for fabricating 1D mesoporous metallic catalysts. 相似文献
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Cover Picture: Template Synthesis of Linear‐Chain Nanodiamonds Inside Carbon Nanotubes from Bridgehead‐Halogenated Diamantane Precursors (Angew. Chem. Int. Ed. 37/2015) 下载免费PDF全文
Yusuke Nakanishi Dr. Haruka Omachi Dr. Natalie A. Fokina Prof. Dr. Peter R. Schreiner Prof. Dr. Ryo Kitaura Dr. Jeremy E. P. Dahl Prof. Dr. Robert M. K. Carlson Prof. Dr. Hisanori Shinohara 《Angewandte Chemie (International ed. in English)》2015,54(37):10683-10683
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WO3纳米管的模板法制备及表征 总被引:5,自引:0,他引:5
0引言 WO3纳米材料具有光致变色、电致变色、气致变色等特性,可用于光学信息和储存显示器、pH值探测器、气敏传感器、灵敏窗口等[1,2];并且在太阳能的储存与利用、光电转换、光催化降解大气和水中的污染物等方面有着广阔的应用前景[3,4],成为近几年重点研究的半导体材料之一.以前纳米WO3的制备主要集中在薄膜上,其薄膜的制备工艺已经相当成熟,主要包括蒸发法、溅射法、CVD法、喷涂法、阳极氧化法、溶胶-凝胶法等[3]. 相似文献
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Brichka S. Ya. Prikhod'ko G. P. Brichka A. V. Ogenko V. M. Chuiko A. A. 《Theoretical and Experimental Chemistry》2002,38(2):114-117
N-Containing carbon nanotubes were prepared by the pyrolysis of acetonitrile in an alumina matrix. Nanotubes were obtained with given diameter and length. Amorphous carbon is also formed on the alumina surface in the acetonitrile pyrolysis. 相似文献
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Dr. Patrik Neuhaus Dr. Arjen Cnossen Juliane Q. Gong Prof. Laura M. Herz Prof. Harry L. Anderson 《Angewandte Chemie (International ed. in English)》2015,54(25):7344-7348
A π‐conjugated twelve‐porphyrin tube is synthesized in 32 % yield by a template‐directed coupling reaction that joins together six porphyrin dimers, forming twelve new C? C bonds. The nanotube has two bound templates, enclosing an internal volume of approximately 4.5 nm3. Its UV/Vis/NIR absorption and fluorescence spectra resemble those of a previously reported six‐porphyrin ring, but are red‐shifted by approximately 300 cm?1, reflecting increased conjugation. Ultrafast fluorescence spectroscopy demonstrates extensive excited‐state delocalization. Transfer of electronic excitation from an initially formed state polarized in the direction of the nanotube axis (z axis) to an excited state polarized in the xy plane occurs within 200 fs, resulting in a negative fluorescence anisotropy on excitation at 742 nm. 相似文献
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Titania nanotubes were synthesized by microwave method. The effects of raw materials, reaction time, NaOH solution concentration, and microwave power were studied. The samples were investigated by means of TEM, XRD, ICP techniques. Titania nanotubes having a hollow structure with an opening end were synthesized in NaOH solution (9~11 mol·L-1) heated by 195 W microwave for over 60 min. The length of the titania nanotubes was about 1 μm and the average diameter of the nanotubes was about 8~10 nm. 相似文献
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G.T. Chandrappa N. Steunou S. Cassaignon C. Bauvais P.K. Biswas J. Livage 《Journal of Sol-Gel Science and Technology》2003,26(1-3):593-596
Vanadium oxide nanotubes (VO
x
-NT) have been prepared by mixing hexadecylamine with V2O5·nH2O gels. This procedure was followed by an hydrothermal treatment (150–180°C, 2–7 days) which leads to a large quantity of VO
x
-NT. SEM and XRD analysis have been used to optimize the temperature and reaction time required for production of VO
x
-Nt and morphology of the nanotubes investigated by TEM. 相似文献