Simulation of WO3 Thin Film Transistor for Biosensors

This paper introduces a WO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> thin-film transistor (TFT)-based biosensor that detects glucose, proteins, and other biomarkers in blood. It addresses the growing demand for real-time, very sensitive medical diagnostics. Tungsten trioxide (WO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>) TFTs are very sensitive, stable, and biocompatible, making them a suitable biosensing platform. Existing WO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> TFT biosensors have restricted response time, low sensitivity, and inadequate performance evaluation for biomarker detection. A Silvaco ATLAS-based simulation is used to examine the electrical properties, carrier mobility, and threshold voltage shifts of the proposed biosensor. The device has a threshold voltage shift of 0.42 V, an ON/OFF current ratio of 10<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sup>, and a subthreshold swing of 110 mV/dec, indicating high sensing capabilities. WO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> TFTs outperform traditional biosensors in terms of response time, selectivity, and label-free detection. The study suggests that WO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>- based biosensors could be useful in point-of-care diagnostics and wearable health monitoring, with potential for device improvement and clinical integration.