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: Thermosensitive Nanocables Prepared by Surface-Initiated Atom Transfer Radical Polymerization | Nanoscale Res Lett 2009 4 84-89 DOI s11671-008-9206-5 NANO EXPRESS Thermosensitive Nanocables Prepared by Surface-Initiated Atom Transfer Radical Polymerization Qingshan Wei Wenbo Zhou Jian Ji Jiacong Shen Received 6 October 2008 Accepted 30 October 2008 Published online 19 November 2008 to the authors 2008 Abstract Thermosensitive nanocables consisting of Au nanowire cores and poly N-isopropylacrylamide sheaths denoted as Au PNIPAAm were synthesized by surface-initiated atom transfer radical polymerization SI-ATRP . The formation of PNIPAAm sheath was verified by Fourier transform infrared FTIR and hydrogen nuclear magnetic resonance 1H NMR spectroscopy. Transmission electron microscope TEM results confirmed the core shell structure of nanohybrids. The thickness and density of PNIPAAm sheaths can be adjusted by controlling the amount of cross-linker during the polymerization. Signature temperature response was observed from Au cross-linked-PNIPAAm nanocables. Such smart nanocables show immense potentials as building blocks for novel thermosensitive nanodevices in future. Keywords Nanocables Gold nanowires Poly N-isopropylacrylamide Surface-initiated atom transfer radical polymerization Thermoresponsive Introduction Coaxial nanocables have received extensive attentions since they were first prepared in 1997 1 . In general they comprise a nanowire core and a protective shell. Based on the nature of sheath materials different synthetic routes are developed to prepare diverse core shell nanocables. Q. Wei W. Zhou J. Ji El J. Shen Department of Polymer Science and Engineering Key Laboratory of Macromolecule Synthesis and Functionalization Ministry of Education Zhejiang University Hangzhou 310027 People s Republic of China e-mail jijian@ Roughly speaking sheath materials can be divided into two groups hard sheaths . C 2 SiO2 3 BN 4 CdSe 5 Au 6 and soft sheaths mainly polymers 7 . The main methods to form a hard or inorganic sheath are vapor .
