tailieunhanh - Báo cáo hóa học: " Indium Tin Oxide@Carbon Core–Shell Nanowire and Jagged Indium Tin Oxide Nanowire"

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: Indium Tin Oxide@Carbon Core–Shell Nanowire and Jagged Indium Tin Oxide Nanowire | Nanoscale Res Lett 2010 5 1682-1685 DOI s11671-010-9695-x NANO EXPRESS Indium Tin Oxide@Carbon Core-Shell Nanowire and Jagged Indium Tin Oxide Nanowire Yong Wang Liqiang Lu Fengdan Wu Received 6 May 2010 Accepted 1 July 2010 Published online 17 July 2010 The Author s 2010. This article is published with open access at Abstract This paper reports two new indium tin oxide ITO -based nanostructures namely ITO@carbon coreshell nanowire and jagged ITO nanowire. The ITO@car-bon core-shell nanowires 50 nm in diameter 1-5 m in length were prepared by a chemical vapor deposition process from commercial ITO nanoparticles. A carbon overlayer 5-10 in thickness was observed around ITO nanowire core which was in situ formed by the catalytic decomposition of acetylene gas. This carbon overlayer could be easily removed after calcination in air at an elevated temperature of 700 C thus forming jagged ITO nanowires 40-45 nm in diameter . The growth mechanisms of ITO@carbon core-shell nanowire and jagged ITO nanowire were also suggested. Keywords Chemical vapor deposition Core-shell Indium tin oxide Nanowire Introduction Indium tin oxide ITO a wide band-gap semiconducting material has been widely used in various fields including liquid crystal display solar cell gas sensor and optoelectronic devices 1-14 . Therefore extensive efforts have been reported to the synthesis and application of ITO materials with various morphologies including nanopowders films and nanorods nanowires 1-3 8-19 . ITO nanorods and nanowires have been prepared by carbon- Y. Wang L. Lu F. Wu Department of Chemical Engineering School of Environmental and Chemical Engineering Shanghai University Shangda Road 99 200444 Shanghai People s Republic of China e-mail yongwang@ 0 Springer assisted synthesis 9 Au-catalyzed vapor-liquid-solid growth 10 11 direct thermal heating 12 13 and solvothermal method 14 . These nanorods or nanowires displayed some interesting properties that were .