Abstract In recent times, semiconductor-carbon composite microstructure offers new prospects in bio-chemical sensor research. In this study, hexagonally structured zinc oxide micro rods (ZnOMRs) were synthesized on activated carbon threads (ACTs) using the chemical bath in the absence of a ZnO seed layer. The ZnOMRs/ACTs based extended gate field effect transistor (EGFET) was characterized as a bio-chemical sensor for pH and glucose in acidosis, neutral and alkalosis media. The ZnOMRs/ACTs based EGFET sensor exhibited glucose sensitivities in terms of reference voltage (VRef) of (20.71, 18.21, and 16.72) mV/mM and drain source current (IDS) of (29.00, 25.60, and 23.62) μA/mM for pH values of 7.2, 7.4, and 7.6, respectively, at room temperature. Thus, the glucose sensitivity of the ZnOMRs/ACTs based EGFET increased with decrease in pH, due to the increased participation of hydrogen ions in the electrochemical exchange reaction between the solution and ZnOMRs/ACTs electrode. Based on the high sensitivity, ZnOMRs/ACTs composite could be a favourable micromaterial for bio-chemical sensor applications.

中文翻译：

---

葡萄糖传感器应用中使用扩展门FET研究酸中毒、中性和碱中毒介质对氧化锌装饰的活性炭线行为的影响

摘要 近年来，半导体-碳复合微结构为生物化学传感器的研究提供了新的前景。在这项研究中，在没有 ZnO 种子层的情况下，使用化学浴在活性炭线 (ACTs) 上合成了六边形结构的氧化锌微棒 (ZnOMR)。基于 ZnOMRs/ACTs 的扩展栅场效应晶体管 (EGFET) 被表征为酸中毒、中性和碱中毒介质中 pH 和葡萄糖的生化传感器。基于 ZnOMR/ACTs 的 EGFET 传感器表现出葡萄糖敏感性，参考电压 (VRef) 为 (20.71、18.21 和 16.72) mV/mM，漏源电流 (IDS) 为 (29.00、25.60 和 23.62) μA/mM室温下的 pH 值分别为 7.2、7.4 和 7.6。因此，基于 ZnOMRs/ACTs 的 EGFET 的葡萄糖敏感性随着 pH 值的降低而增加，由于氢离子在溶液和 ZnOMRs/ACTs 电极之间的电化学交换反应中的参与增加。基于高灵敏度，ZnOMRs/ACTs 复合材料可能是用于生化传感器应用的有利微材料。