Nanomaterials | |
Acrylamide Hydrogel-Modified Silicon Nanowire Field-Effect Transistors for pH Sensing | |
Qingzhu Zhang1  Jiawei Hu2  Jing Zhang2  Shuhua Wei2  Qianhui Wei3  Yan Zhu3  Hailing Tu3  Feng Wei3  Hongbin Zhao3  Guozhi Wang3  Yun Kong3  Gangrong Li3  Qingxi Jin3  | |
[1] Advanced Integrated Circuits R&D Center, Institute of Microelectronic of the Chinese Academy of Sciences, Beijing 100029, China;School of Information Science and Technology, North China University of Technology, Beijing 100144, China;State Key Laboratory of Advanced Materials for Smart Sensing, GRINM Group Co., Ltd., Beijing 100088, China; | |
关键词: acrylamide hydrogel; silicon nanowire; FET sensor; pH sensitive; | |
DOI : 10.3390/nano12122070 | |
来源: DOAJ |
【 摘 要 】
In this study, we report a pH-responsive hydrogel-modified silicon nanowire field-effect transistor for pH sensing, whose modification is operated by spin coating, and whose performance is characterized by the electrical curve of field-effect transistors. The results show that the hydrogel sensor can measure buffer pH in a repeatable and stable manner in the pH range of 3–13, with a high pH sensitivity of 100 mV/pH. It is considered that the swelling of hydrogel occurring in an aqueous solution varies the dielectric properties of acrylamide hydrogels, causing the abrupt increase in the source-drain current. It is believed that the design of the sensor can provide a promising direction for future biosensing applications utilizing the excellent biocompatibility of hydrogels.
【 授权许可】
Unknown