Acrylamide Hydrogel-Modified Silicon Nanowire Field-Effect Transistors for pH Sensing

Nanomaterials

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