Abstract This is the first demonstration of direct growth of iron pyrite (FeS2) via a single step hydrothermal route on low cost, biodegradable, flexible cellulose paper substrate which is further explored as a versatile multifunctional platform for memristor (with top and bottom electrodes) and wearable breath sensor (with planar contacts) which exhibits excellent switching and response respectively. XRD, EDAX studies confirmed the formation of crystalline pyrite FeS2. Memristor device exhibits excellent bipolar resistive switching mechanism at very low set, reset voltages i.e. +0.25 V, −0.5 V with a very low power consumption in the range of few micro to nano watts, decent switching ratio of 4 × 102, good data retention up to 2 × 104 s and excellent switching endurance up to 500 cycles. Furthermore, FeS2 grown on paper displayed excellent response towards exhaled breath exhibiting distinguished response towards oral and nasal breath. The sensor was employed in monitoring the exhaled breath pattern during dynamic movements like walking, running and jumping. The mechanism of sensing can be attributed to the conductivity and hydrophilic nature of sensor aiding in adsorption and desorption of the water molecules from the exhaled breath on to the FeS2 microspheres. The strategy outlined here, presents a low cost approach using iron and its pyrites which are abundant, non-toxic and also cost effective based flexible devices for multifunctional electronic applications.

中文翻译：

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在纸上直接生长 FeS2：一种灵活的多功能平台，用于超低成本、低功耗忆阻器和可穿戴非接触式呼吸传感器，用于活动检测

摘要 这是首次在低成本、可生物降解、柔韧的纤维素纸基材上通过一步水热法直接生长黄铁矿 (FeS2)，进一步探索作为忆阻器（带有顶部和底部电极）的多功能多功能平台和可穿戴式呼吸传感器（带有平面触点），分别具有出色的切换和响应能力。XRD、EDAX 研究证实了结晶黄铁矿 FeS2 的形成。忆阻器器件在非常低的设置、复位电压（即 +0.25 V、-0.5 V）下表现出出色的双极电阻开关机制，功耗非常低，从几微瓦到几纳瓦，4 × 102 的良好开关比，良好的数据保留高达 2 × 104 s 和高达 500 次循环的出色开关耐久性。此外，在纸上生长的 FeS2 对呼出的呼吸表现出极好的反应，对口腔和鼻呼吸表现出明显的反应。该传感器用于监测步行、跑步和跳跃等动态运动期间的呼气模式。传感机制可归因于传感器的导电性和亲水性，有助于将呼出气中的水分子吸附和解吸到 FeS2 微球上。此处概述的策略提出了一种使用铁及其黄铁矿的低成本方法，铁及其黄铁矿是用于多功能电子应用的丰富、无毒且具有成本效益的柔性设备。该传感器用于监测步行、跑步和跳跃等动态运动期间的呼气模式。传感机制可归因于传感器的导电性和亲水性，有助于将呼出气中的水分子吸附和解吸到 FeS2 微球上。此处概述的策略提出了一种使用铁及其黄铁矿的低成本方法，铁及其黄铁矿是用于多功能电子应用的丰富、无毒且具有成本效益的柔性设备。该传感器用于监测步行、跑步和跳跃等动态运动期间的呼气模式。传感机制可归因于传感器的导电性和亲水性，有助于将呼出气中的水分子吸附和解吸到 FeS2 微球上。此处概述的策略提出了一种使用铁及其黄铁矿的低成本方法，铁及其黄铁矿是用于多功能电子应用的丰富、无毒且具有成本效益的柔性设备。