Broadband and Ultrasensitive Graphene-Based Mechanical Wave Detector with Nanosecond Response Used for Biological Photoacoustic Imaging,ACS Applied Materials & Interfaces

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Broadband and Ultrasensitive Graphene-Based Mechanical Wave Detector with Nanosecond Response Used for Biological Photoacoustic Imaging
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-04-02 , DOI: 10.1021/acsami.0c02112
Zongwen Li ₁ , Xiaoyi Zhu ₂ , Tiange Wu ₁ , Xue Han ₁ , Fei Xing ₁ , Guohe Wang ₃

Affiliation

Achieving broadband and sensitive mechanical wave detection with fast time response remains a great challenge. Here, we exploited the polarization-sensitive absorption characteristics and ultrafast photoelectric response of graphene to construct a broadband and ultrasensitive detector with a nanosecond response for mechanical wave detection. The unprecedented performance of the graphene-based detector allowed us to detect high-frequency mechanical waves over 100 MHz with a detection limit of 0.18 kPa. Moreover, we applied the detector in high-contrast photoacoustic imaging of human hairs and a mouse hindlimb to demonstrate its capability in detection of photoacoustic waves. This device could also find application in other areas such as THz detection and modulation.

中文翻译：

基于纳秒响应的宽带超灵敏石墨烯机械波探测器，用于生物光声成像

实现快速响应的宽带和灵敏的机械波检测仍然是一个巨大的挑战。在这里，我们利用石墨烯的极化敏感吸收特性和超快光电响应来构建具有纳秒响应的宽带和超灵敏检测器，用于机械波检测。基于石墨烯的检测器空前的性能使我们能够检测100 MHz以上的高频机械波，检测极限为0.18 kPa。此外，我们将检测器应用于人发和小鼠后肢的高对比度光声成像中，以证明其检测光声波的能力。该设备还可在其他领域中找到应用，例如太赫兹检测和调制。

更新日期：2020-04-03

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