Park Taehee, Sim Kijo, Lee Jongtaek, Yi Whikun
Department of Chemistry and Research Institute for Natural Sciences, Hanyang University, Haengdang-dong 17, Seoul 133-791, Korea.
J Nanosci Nanotechnol. 2012 Jul;12(7):5812-5. doi: 10.1166/jnn.2012.6338.
Single-walled carbon nanotubes (SWNTs) are known to have a p-type charge transfer character in the atmosphere. The energy state of SWNTs can be modulated by doping with either an electron donor or an acceptor. In this study, iodine molecules are chosen for intercalation to SWNTs to predict the charge transfer tendency between them. Field-effect transistors (FETs) using iodine intercalated SWNTs (I-SWNTs) are fabricated and their electronic properties are investigated to better understand the charge transfer between iodine and SWNTs by changing gate voltages. Under vacuum, I-SWNT FETs exhibit weak n-type character, indicating that electrons are transferred slightly from the iodine to the SWNTs. After exposure to O2 gas, n-type characters are reduced; however, they still retain their original type.
已知单壁碳纳米管（SWNTs）在大气中具有p型电荷转移特性。通过用电子供体或受体进行掺杂，可以调节SWNTs的能态。在本研究中，选择碘分子插入SWNTs中，以预测它们之间的电荷转移趋势。制备了使用碘插入SWNTs（I-SWNTs）的场效应晶体管（FETs），并通过改变栅极电压来研究其电学性质，以便更好地理解碘与SWNTs之间的电荷转移。在真空下，I-SWNT FETs表现出弱n型特性，表明电子从碘略微转移到SWNTs。暴露于O2气体后，n型特性降低；然而，它们仍保持其原始类型。
