Báo cáo hóa học: "Fabrication of Uniform Au–Carbon Nanofiber by Two-Step Low Temperature Decomposition"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Fabrication of Uniform Au–Carbon Nanofiber by Two-Step Low Temperature Decomposition | Nanoscale Res Lett 2009 4 932-936 DOI S11671-009-9341-7 NANO EXPRESS Fabrication of Uniform Au-Carbon Nanofiber by Two-Step Low Temperature Decomposition Myeongsoon Lee Seong-Cheol Hong Don Kim Received 1 April 2009 Accepted 5 May 2009 Published online 22 May 2009 to the authors 2009 Abstract This paper presents a facile and efficient way to prepare carbon nanofibers ornamented with Au nanoparticles Au CNFs . Gold nanoparticles were first deposited in the channels of an anodized aluminum oxide AAO membrane by thermal decomposition of HAuCl4 and then carbon nanofibers were produced in the same channels loaded with the Au nanoparticles by decomposition of sucrose at 230 C. An electron microscopy study revealed that the carbon nanofibers 10 nm thick and 6 qm long were decorated with Au nanoparticles with a diameter of 10 nm. This synthetic route can produce uniform Au nanoparticles on CNF surfaces without using any additional chemicals to modify the AAO channels or the CNF surfaces. Keywords Au Carbon Nanoparticles Nanofibers AAO Introduction Carbon nanostructures have attracted extensive attentions due to their unique physicochemical properties and promising applications in nanodevices 1 2 . One of the major challenges for nanodevice fabrication is how to immobilize the functional nanostructures on electrically conducting electrodes. Amma et al. 3 demonstrated that extremely hydrophilic carbon nanotubes CNTs could be immobilized on a hydrophilic Au surface by means of electrostatic interaction. However this technique requires harsh chemical M. Lee . Hong D. Kim El Department of Chemistry Pukyong National University 599-1 Daeyon 3 dong Namgu Busan 608-737 Korea e-mail donkim@ reactions . azo-coupling to modify the CNT surface with a hydrophilic group . -SO3Na . The harsh reaction conditions and the bonded chemical groups may cause some changes of the intrinsic nature of the carbon nanotubes. Therefore an alternative immobilization method .

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