材料科学
压力传感器
磁滞
蓝宝石
光电子学
接口(物质)
聚二甲基硅氧烷
复合材料
光学
机械工程
激光器
物理
量子力学
毛细管数
毛细管作用
工程类
作者
Binlu Yu,Yumeng Luo,Jing Li,Huaiyu Ye,K. H. Li
标识
DOI:10.1021/acsami.2c09291
摘要
In this work, a compact, near-hysteresis-free hydraulic pressure sensor is presented through interface engineering in a GaN chip-scale optical device. The sensor consists of a monolithic GaN-on-sapphire device responsible for light emission and detection and a multilevel microstructured polydimethylsiloxane (PDMS) film prepared through a low-cost molding process using sandpaper as a template. The micro-patterned PDMS film functions as a pressure-sensing medium to effectively modulate the reflectance properties at the sapphire interface during pressure loading and unloading. The interface engineering endows the GaN optical device with near-hysteresis-free performance over a wide pressure range of up to 0-800 kPa. Verified by a series of experimental measurements on its dynamic responses, the tiny hydraulic sensor exhibits superior performance in hysteresis, stability, repeatability, and response time, indicating its considerable potential for a broad range of practical applications.
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