Cellulose Nanocrystal Films with NIR-II Circularly Polarized Light for Cancer Detection Applications
Cellulose Nanocrystal Films with NIR-II Circularly Polarized Light for Cancer Detection Applications
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DOI：
10.1021/acsnano.2c08910
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发表时间：
2022-12-23
期刊：
影响因子：
17.1
通讯作者：
Xu，Yan
中科院分区：
文献类型：
--
作者：
Lu，Di;Li，Mengfei;Xu，Yan
近红外圆偏振光具有广泛的应用前景。然而，高性能近红外圆偏振光的实现具有一定的挑战性。在这里，我们证明了由超声悬浊液制备的左手手性光子纤维素纳米晶体（CNC）薄膜在第二个近红外窗口（NIR-II）中可以产生右手圆偏振发光，不对称系数为- 0.330。本文从理论上分析了结构缺陷和发光强度不均一性对带隙内右旋圆偏振发光和带边缘左旋圆偏振发光的不利影响。我们展示了具有NIR-II圆偏振光的手性光子CNC膜用于癌细胞识别的潜力。本工作确定了基于cnc的圆偏振发光材料研究中的关键科学问题。
Near-infrared circularly polarized light is attractive for wide-ranging applications. However, high-performance near-infrared circularly polarized light is challenging to realize. Here, we show that left-handed chiral photonic cellulose nanocrystal (CNC) films produced from ultrasonicated suspensions enable right-handed circularly polarized luminescence with a dissymmetry factor of −0.330 in the second near-infrared window (NIR-II). We present a theoretical analysis of the adverse effect of structural defects and luminescence intensity heterogeneity on the right-handed circularly polarized luminescencegluminside the bandgap and the occurrence of left-handed circularly polarized luminescence at the band edges. We demonstrate the potential of the chiral photonic CNC films with NIR-II circularly polarized light for cancer cell discrimination. The present work identifies key scientific questions in CNC-based circularly polarized luminescence materials research.