手性向列相纤维素纳米晶体/ZnO 薄膜的可调谐构建用于超灵敏、可回收的湿度和乙醇传感。
Tunable Construction of Chiral Nematic Cellulose Nanocrystals/ZnO Films for Ultra-Sensitive, Recyclable Sensing of Humidity and Ethanol.
机构信息
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China.
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
出版信息
Int J Mol Sci. 2024 May 2;25(9):4978. doi: 10.3390/ijms25094978.
The investigation of functional materials derived from sustainable and eco-friendly bioresources has generated significant attention. Herein, nanocomposite films based on chiral nematic cellulose crystals (CNCs) were developed by incorporating xylose and biocompatible ZnO nanoparticles (NPs) via evaporation-induced self-assembly (EISA). The nanocomposite films exhibited iridescent color changes that corresponded to the birefringence phenomenon under polarized light, which was attributed to the formation of cholesteric structures. ZnO nanoparticles were proved to successfully adjust the helical pitches of the chiral arrangements of the CNCs, resulting in tunable optical light with shifted wavelength bands. Furthermore, the nanocomposite films showed fast humidity and ethanol stimuli response properties, exhibiting the potential of stimuli sensors of the CNC-based sustainable materials.
从可持续和环保型生物资源中开发功能性材料的研究引起了广泛关注。在此，通过蒸发诱导自组装（EISA）将木糖和生物相容性 ZnO 纳米粒子（NPs）掺入手性向列纤维素晶体（CNCs）中，制备了纳米复合薄膜。纳米复合薄膜在偏振光下表现出与双折射现象相对应的虹彩颜色变化，这归因于胆甾型结构的形成。ZnO 纳米粒子被证明可以成功地调节 CNC 手性排列的螺旋间距，从而实现可调谐的光学光，其波长带发生偏移。此外，纳米复合薄膜表现出快速的湿度和乙醇刺激响应特性，展示了基于 CNC 的可持续材料的刺激传感器的潜力。
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