光电二极管
材料科学
紫外线
纳米晶
光电子学
光电探测器
荧光寿命成像显微镜
荧光
吸收(声学)
图像传感器
光谱成像
光学
纳米技术
物理
复合材料
作者
Cheng Chen,Ziwen Wang,Jiajing Wu,Zhengtao Deng,Tao Zhang,Zhongmin Zhu,Yifei Jin,Benjamin Lew,Indrajit Srivastava,Zhongshuai Liang,Shuming Nie,Viktor Gruev
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2023-11-03
卷期号:9 (44)
被引量:1
标识
DOI:10.1126/sciadv.adk3860
摘要
Imaging and identifying target signatures and biomedical markers in the ultraviolet (UV) spectrum is broadly important to medical imaging, military target tracking, remote sensing, and industrial automation. However, current silicon-based imaging sensors are fundamentally limited because of the rapid absorption and attenuation of UV light, hindering their ability to resolve UV spectral signatures. Here, we present a bioinspired imaging sensor capable of wavelength-resolved imaging in the UV range. Inspired by the UV-sensitive visual system of the Papilio xuthus butterfly, the sensor monolithically combines vertically stacked photodiodes and perovskite nanocrystals. This imaging design combines two complementary UV detection mechanisms: The nanocrystal layer converts a portion of UV signals into visible fluorescence, detected by the photodiode array, while the remaining UV light is detected by the top photodiode. Our label-free UV fluorescence imaging data from aromatic amino acids and cancer/normal cells enables real-time differentiation of these biomedical materials with 99% confidence.
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