Guided Organic Crystalline Nanowires by Directional Friction‐Transferred Poly(Tetrafluoroethylene) Nanogrooves and Their Monolithic Phototransistors

• DOI: 10.1002/admt.202302015
• Publication Date: 2024-02-14T11:39:08Z
• Authors: Yajun Li; Wei Zhou; Xuebao Cai; Xiangtao Chen; Hanyu Liu; Pingyang Huang; Xingyu Wang; Jinyou Xu
• Keywords: 0210 nano-technology; 0104 chemical sciences

Abstract The monolithic integration of bottom‐up nanowires into devices requires rational growth aligned nanowires. Of the proposed methods, few are sufficiently general to be applicable diverse materials and substrates. In this work, oriented poly(tetrafluoroethylene) (PTFE) grooves with nanoscale depth width transferred onto different substrates through a simple directional mechanical friction. This friction is achieved in seconds by program‐driven handwriting machine. Various organic molecules (e.g., Alq3, NiPc, CoPc, CuPc, F 16 CuPc) therefore assembled crystalline on surface Si, Si/SiO 2 , glass. self‐alignment these enables scalable device fabrication directly substrates, eliminating structural damage contamination during post‐growth alignment. For example, using CuPc PTFE‐coated wafers, back‐gate field‐effect phototransistors fabricated manner depositing an array micro‐sized electrodes. Statistical results show that operate n‐type enhancement mode thresholds volts. addition, they exhibit fast photoresponse order tens milliseconds long‐term stability vis–NIR spectrum. generality guided nanowire resulting offer new opportunities for nanowire‐based devices.