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Piperidine induced polarity conversion in single-walled carbon nanotube field effect transistors

机译:哌啶诱导的单壁碳纳米管场效应晶体管中的极性转换

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摘要

Piperidine is found to be an efficient electron doping agent that converts as-prepared p-type single-walled carbon nanotube (SWCNT) field effect transistors (FETs) into n-type SWCNT-FETs. Electron transfer from the amine group in piperidine to the SWCNTs is suggested to be the origin of the p-to n-type conversion. The effect of electron doping is further supported by the Raman tangential G~+ and G~--peak downshift up to 3cm ~(- 1) without the peak broadening. No detectable change in the Raman D-peak suggests non-covalent attachment of piperidine to the SWCNTs. A low temperature (110 °C) Si_3N_4 passivation layer is used to maintain the long term air stability of the converted n-type devices. A complementary SWCNT inverter is demonstrated through integrating the n-and p-type SWCNT-FETs.
机译:发现哌啶是一种有效的电子掺杂剂,它将制备好的p型单壁碳纳米管(SWCNT)场效应晶体管(FET)转换为n型SWCNT-FET。电子从哌啶中的胺基转移至SWCNT被认为是p型向n型转化的起源。电子掺杂的影响进一步由拉曼切向G〜+和G〜-峰值下移直至3cm〜(-1)而没有峰展宽。拉曼D峰没有可检测到的变化表明哌啶与SWCNT非共价结合。低温(110°C)Si_3N_4钝化层用于维持转换后的n型器件的长期空气稳定性。通过集成n型和p型SWCNT-FET展示了互补的SWCNT逆变器。

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