Protein-Based Flexible Moisture-Induced Energy-Harvesting Devices As Self-Biased Electronic Sensors,ACS Applied Electronic Materials

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Protein-Based Flexible Moisture-Induced Energy-Harvesting Devices As Self-Biased Electronic Sensors
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-02-05 , DOI: 10.1021/acsaelm.9b00842
Suman Mandal ₁ , Satyajit Roy ₁ , Ajoy Mandal ₁ , Tanmay Ghoshal ₂ , Gangadhar Das ₃ , Arnab Singh ₄ , Dipak K. Goswami _{1,

5}

Affiliation

Thin protein films of gelatin molecules grown on flexible substrates have been utilized to fabricate moisture-induced energy-harvesting devices, which work as self-biased sensors. Adsorbed water molecules from ambient moisture generate protons inside the film. A proton transfer path is formed through the hydrogen-bonded water molecules with protein around 55% relative humidity condition, and the protons are transferred due to the gradient of absorbed water molecules within the protein films. The devices are capable of harvesting electric power up to 5.5 μW/cm² with an induced voltage of 0.71 V. Our findings not only provide a futuristic clean power generation concept from protein film as flexible power generator but also demonstrate the use of the energy-harvesting devices as self-biased electronic sensors for various flexible and wearable applications. The devices showed exceptional performance as humidity sensors and have been used for flexible healthcare applications, such as continuous monitoring of breathing pattern and lateral mapping of moisture levels at the finger tip for monitoring the wound healing process. Nevertheless, the diode-like response of the devices with humidity has been found to be suitable as a self-biased humidity-controlled electronic switch.

中文翻译：

基于蛋白质的柔性水分诱导能量收集装置作为自偏置电子传感器

生长在柔性基板上的明胶分子的薄蛋白膜已被用于制造水分诱导的能量收集装置，该装置用作自偏置传感器。来自环境湿气的吸附水分子会在薄膜内部产生质子。质子传递路径是通过氢键结合的水分子与相对湿度约为55％的蛋白质形成的，质子由于吸收的水分子在蛋白质膜中的梯度而被传递。该设备能够收集高达5.5μW/ cm ^2的电能感应电压为0.71V。我们的发现不仅为蛋白膜作为柔性发电器提供了一种未来主义的清洁发电概念，而且还证明了能量收集设备作为自偏置电子传感器在各种柔性和可穿戴应用中的使用。该设备作为湿度传感器表现出优异的性能，并已用于灵活的医疗保健应用，例如连续监测呼吸模式和指尖水分水平的侧向图，以监测伤口愈合过程。然而，已经发现具有湿度的器件的类似二极管的响应适合作为自偏置的湿度控制电子开关。

更新日期：2020-02-05

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