DataVXEmerging Materials ResearchPaper
journal article·2025-06-01

Strongly coupled relative humidity sensor coated with graphene oxide/polyvinyl alcohol composite

Jiachen Guo, Yueyan Shi, Mingyan Zhou, Yuhan Zhou, Shuang Li, Xiajing Zhang, Yuqing Sun, Tao Wu, Liang Zhou

Emerging Materials Research· Volume 14· Issue 2
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Source abstract

Abstract

A novel coupled fibre-optic humidity sensor based on a biconical fibre-optic graphene oxide/polyvinyl alcohol (GO/PVA) structure is reported for the first time. The sensor itself adopts a 1 × 2 coupler structure with a waist diameter of 24 μm. A GO/PVA composite film is coated in the strong coupling region to improve the sensitivity of the sensor. The thickness of the composite film is relatively uniform, with the thinnest point being only 1.41 μm. The sensor can realise linear sensing in a relative humidity (RH) range of 55%–75% RH, with a sensitivity as high as 0.003/% RH and a sensor linearity as high as 99.44%. Its dynamic response time and recovery time are 0.85 s and 1.69 s. In addition, the sensor has good stability, repeatability, reversibility, and low-temperature crosstalk. Based on these characteristics, it is foreseeable that the sensor will bring a great breakthrough in applications that require sensitive monitoring of humidity.
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Research context

NanomaterialsComposites

OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Analytical Chemistry and Sensors · Advanced Sensor and Energy Harvesting Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Collaborative Innovation Center, Shanghai University of Medicine and Health Sciences, Shanghai, China

School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, China

Humanities and Social Sciences, The University of Edinburgh, Edinburgh, UK

Collaborative Innovation Center, Shanghai University of Medicine and Health Sciences, Shanghai, China; School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China

SAIC Volkswagen Automotive Co., Ltd, Shanghai, China

Jiading District Central Hospital Affiliated Shanghai University of Medicine & Health Sciences, Shanghai, China; Biomedical Engineering Fusion Laboratory, Jiangning Hospital Affiliated to Nanjing Medical University, Nanjin, China (corresponding author: )

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