An easily manipulative approach was presented to fabricate electrodes using free-standing single-walled carbon nanotube （SWCNT） films grown directly by chemical vapor deposition. Electrochemical properties of the el...An easily manipulative approach was presented to fabricate electrodes using free-standing single-walled carbon nanotube （SWCNT） films grown directly by chemical vapor deposition. Electrochemical properties of the electrodes were investigated. In comparison with the post-deposited SWCNT papers, the directly grown SWCNT film electrodes manifested enhanced electrochemical properties and sensitivity of sensors as well as excellent electrocatalytic activities. A transition from macroelectrode to nanoelectrode behaviours was observed with the increase of scan rate. The heat treatment of the SWCNT film electrodes increased the current signals of electrochemical analyser and background current, because the heat-treatment of the SWCNTs in air could create more oxide defects on the walls of the SWCNTs and make the surfaces of SWCNTs more hydrophilic. The excellent electrochemical properties of the directly grown and heat-treated free-standing SWCNT film electrodes show the potentials in biological and electrocatalytic applications.展开更多
基金supported by the National Natural Science Foundation of Chinathe National Basic Research Program of China (GrantNo. 2005CB623602)+1 种基金the Fund of the Beijing Municipal Education Commission (Grant No. YB20108000101)the Key Item of Knowledge Innovation Project of the Chinese Academy of Sciences (Grant No. KJCX2-YW-M01)
文摘An easily manipulative approach was presented to fabricate electrodes using free-standing single-walled carbon nanotube （SWCNT） films grown directly by chemical vapor deposition. Electrochemical properties of the electrodes were investigated. In comparison with the post-deposited SWCNT papers, the directly grown SWCNT film electrodes manifested enhanced electrochemical properties and sensitivity of sensors as well as excellent electrocatalytic activities. A transition from macroelectrode to nanoelectrode behaviours was observed with the increase of scan rate. The heat treatment of the SWCNT film electrodes increased the current signals of electrochemical analyser and background current, because the heat-treatment of the SWCNTs in air could create more oxide defects on the walls of the SWCNTs and make the surfaces of SWCNTs more hydrophilic. The excellent electrochemical properties of the directly grown and heat-treated free-standing SWCNT film electrodes show the potentials in biological and electrocatalytic applications.
