Abstract Chemiresistive gas sensors play a significant role in human exhaled breath analysis for non-invasive disease diagnosis applications. Ammonia has been considered as one of the prominent biomarkers, which is present in the exhaled breath of persons affected by chronic kidney disease (CKD). In this context, polyvinyl pyrrolidine (PVP) - zinc oxide (ZnO) nanofibers based chemiresistive gas sensor has been developed for the detection of ammonia at room temperature. PVP-ZnO nanofibers were synthesized using electrospinning technique with an applied potential of 20 kV. The synthesized nanofibers were calcined in the temperature range of 200–700°C in steps of 100°C. The influence of calcination temperature on the structural, morphological, electrical and optical properties were investigated using various characterization techniques. Further, calcinated samples were drop cast onto the Ag/Pd electrode for sensing studies using a homemade gas chamber integrated with high resistance electrometer. The sample calcined at 500°C showed a selective response towards ammonia with a response of 20 towards 50 ppm, and response and recovery times of 88 and 65 s.

中文翻译：

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煅烧温度对电纺多结氧化锌纳米线生长的影响：室温氨传感器

摘要 化学电阻式气体传感器在用于非侵入性疾病诊断应用的人体呼气分析中发挥着重要作用。氨被认为是重要的生物标志物之一，它存在于慢性肾病 (CKD) 患者的呼出气中。在此背景下，已开发出基于聚乙烯吡咯烷 (PVP) - 氧化锌 (ZnO) 纳米纤维的化学电阻式气体传感器，用于在室温下检测氨。PVP-ZnO 纳米纤维使用静电纺丝技术合成，施加电压为 20 kV。合成的纳米纤维在 200-700°C 的温度范围内以 100°C 的步长进行煅烧。使用各种表征技术研究了煅烧温度对结构、形态、电学和光学性质的影响。更多，将煅烧样品滴铸到 Ag/Pd 电极上，使用与高电阻静电计集成的自制气室进行传感研究。在 500°C 下煅烧的样品显示出对氨的选择性响应，对 50 ppm 的响应为 20，响应和恢复时间分别为 88 和 65 秒。