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

Gangrong Li; Qianhui Wei; Shuhua Wei; Jing Zhang; Qingxi Jin; Guozhi Wang; Jiawei Hu; Yan Zhu; Yun Kong; Qingzhu Zhang; Hongbin Zhao; Feng Wei; Hailing Tu

doi:10.3390/nano12122070

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

Gangrong Li, Qianhui Wei^*, Shuhua Wei, Jing Zhang, Qingxi Jin, Guozhi Wang, Jiawei Hu, Yan Zhu, Yun Kong, Qingzhu Zhang, Hongbin Zhao, Feng Wei^*, Hailing Tu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

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.

Original language	English
Article number	2070
Journal	Nanomaterials
Volume	12
Issue number	12
DOIs	https://doi.org/10.3390/nano12122070
Publication status	Published - 1 Jun 2022
Externally published	Yes

Keywords

acrylamide hydrogel
FET sensor
pH sensitive
silicon nanowire

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10.3390/nano12122070

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Li, G., Wei, Q., Wei, S., Zhang, J., Jin, Q., Wang, G., Hu, J., Zhu, Y., Kong, Y., Zhang, Q., Zhao, H., Wei, F., & Tu, H. (2022). Acrylamide Hydrogel-Modified Silicon Nanowire Field-Effect Transistors for pH Sensing. Nanomaterials, 12(12), Article 2070. https://doi.org/10.3390/nano12122070

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title = "Acrylamide Hydrogel-Modified Silicon Nanowire Field-Effect Transistors for pH Sensing",

abstract = "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.",

keywords = "acrylamide hydrogel, FET sensor, pH sensitive, silicon nanowire",

author = "Gangrong Li and Qianhui Wei and Shuhua Wei and Jing Zhang and Qingxi Jin and Guozhi Wang and Jiawei Hu and Yan Zhu and Yun Kong and Qingzhu Zhang and Hongbin Zhao and Feng Wei and Hailing Tu",

note = "Publisher Copyright: {\textcopyright} 2022 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2022",

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doi = "10.3390/nano12122070",

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T1 - Acrylamide Hydrogel-Modified Silicon Nanowire Field-Effect Transistors for pH Sensing

AU - Li, Gangrong

AU - Wei, Qianhui

AU - Wei, Shuhua

AU - Zhang, Jing

AU - Jin, Qingxi

AU - Wang, Guozhi

AU - Hu, Jiawei

AU - Zhu, Yan

AU - Kong, Yun

AU - Zhang, Qingzhu

AU - Zhao, Hongbin

AU - Wei, Feng

AU - Tu, Hailing

PY - 2022/6/1

Y1 - 2022/6/1

N2 - 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.

AB - 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.

KW - acrylamide hydrogel

KW - FET sensor

KW - pH sensitive

KW - silicon nanowire

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U2 - 10.3390/nano12122070

DO - 10.3390/nano12122070

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VL - 12

JO - Nanomaterials

JF - Nanomaterials

IS - 12

M1 - 2070

ER -

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

Abstract

Keywords

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