用于柔性压电纳米发电机和无线机械传感器应用的 2D MoO3/PVDF-HFP 纳米复合材料,ACS Applied Nano Materials

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用于柔性压电纳米发电机和无线机械传感器应用的 2D MoO3/PVDF-HFP 纳米复合材料
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2024-01-10 , DOI: 10.1021/acsanm.3c05013
Manisha Kundu _{1,

2} , Dheeraj Mondal ₃ , Navonil Bose _{1,

4} , Ruma Basu ₂ , Sukhen Das ₁

Affiliation

无线、灵活和自供电传感器的最新进展为以最高的分辨率和精度实时监测远程位置的机械压力刺激开辟了途径。这项工作报告了基于二维 MoO ₃ /PVDF-HFP 复合材料的柔性高效压电纳米发电机 (PNG) 的开发。系统研究了二维α相MoO ₃ (α-MoO ₃ )纳米片对聚(偏二氟乙烯-六氟丙烯)(PVDF-HFP)多晶型的影响，目的是最大化电活性β相。制备了一系列含有 α-MoO ₃纳米片的柔性、透明、自支撑的 PVDF-HFP 复合薄膜，其负载重量百分比分别为 1%、1.5% 和 2%（分别为 PMO1、PMO1.5 和 PMO2）通过溶液浇铸技术。PMO2 表现出 76% 的高 β 相分数，可用于制造简便且灵活的 PNG 器件。手指轻轻敲击 PNG 会显示出出色的开路输出电压（30 MΩ 电阻上为 50 V），最大功率密度为 1512 W m ^–3，转换效率为 30.4%。PNG 在定性检测动态压力刺激方面表现出了良好的性能。它能够精确监测和区分不同手指的弯曲运动以及食指近端指间关节和掌指关节的精细运动。由 PNG 组成的 (4 × 4) 传感矩阵成功地用于检测静压刺激的空间分布（灵敏度为 ∼15.5 MPa ^–1），并且所开发的矩阵能够精确记录静压刺激的形状和尺寸。放置在其上的物体。基于 PNG 的传感器还通过无线技术与 Android 移动界面集成，用于遥感应用。因此，所制造的 PNG 可以成为一种有前途的设备，用于无线监测医疗保健监测、机器人和可穿戴电子产品等不同尖端技术中的机械压力刺激。

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2D MoO3/PVDF–HFP Nanocomposites for Flexible Piezoelectric Nanogenerator and Wireless Mechanosensor Applications

Recent advancements in wireless, flexible, and self-powered sensors have opened avenues for real-time monitoring of mechanical pressure stimuli at remote locations with utmost resolution and precision. This work reports on the development of a 2-D MoO₃/PVDF–HFP composite-based flexible and highly efficient piezoelectric nanogenerator (PNG). The influence of 2-D α-phase MoO₃ (α-MoO₃) nanoflakes on the polymorphism of poly(vinylidene fluoride-co-hexa-fluoropropylene) (PVDF–HFP) was systematically investigated with the aim of maximizing the electroactive β phase. A series of α-MoO₃ nanoflakes-incorporated flexible, transparent, and self-standing PVDF–HFP composite films with varying loading weight percentages of 1, 1.5, and 2% (PMO1, PMO1.5, and PMO2, respectively) were prepared by the solution casting technique. PMO2 exhibited a high β-phase fraction of 76% and was used to fabricate a facile and flexible PNG device. Gentle finger tapping onto the PNG showed an excellent open-circuit output voltage (50 V across 30 MΩ resistance) with a maximum power density of 1512 W m^–3 and a conversion efficiency of 30.4%. The PNG demonstrated a promising performance for qualitatively detecting dynamic pressure stimuli. It was able to precisely monitor and discriminate the bending motion of different fingers and fine motions of proximal interphalangeal and metacarpophalangeal joints of the index finger. A (4 × 4) sensing matrix comprising the PNG was successfully employed to detect the spatial distribution of static pressure stimuli (with a sensitivity of ∼15.5 MPa^–1), and the developed matrix was able to precisely record the shape and size of the objects placed onto it. The PNG-based sensor was also integrated with an android mobile interface through wireless technology for remote sensing applications. Hence, the fabricated PNG can be a promising device for wireless monitoring of mechanical pressure stimuli in different cutting-edge technologies such as healthcare monitoring, robotics, and wearable electronics.

更新日期：2024-01-10

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