Cellulose acetate is a safe, sustainable, and cost-effective material that is capable of forming nanostructures through facial processing methods such as surface imprinting. Forming optically active structures using cellulose acetate can advance green photonic device design. In this work, we create a hybrid material consisting of nanoscale plasmon active metal–semiconductor Schottky junctions. Demonstrating that such a hybrid material possesses improved performance when applied to Raman-based sensing. Boosting surface-enhanced Raman detection sensitivity through electromagnetic and chemical enhancement mechanisms from the metal-semiconductor junction, in addition to photonic resonances created via the imprinted nanoscale metamaterial array surface features. This work expands the use of cellulose-based materials for sensing-based applications.

中文翻译：

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纳米压印醋酸纤维素-TiO2复合薄膜

醋酸纤维素是一种安全、可持续且经济高效的材料，能够通过表面压印等表面处理方法形成纳米结构。使用醋酸纤维素形成光学活性结构可以推进绿色光子器件的设计。在这项工作中，我们创建了一种由纳米级等离子体活性金属-半导体肖特基结组成的混合材料。证明这种混合材料在应用于基于拉曼的传感时具有改进的性能。除了通过压印纳米级超材料阵列表面特征产生的光子共振之外，还通过金属-半导体结的电磁和化学增强机制提高表面增强拉曼检测灵敏度。这项工作扩大了纤维素基材料在传感应用中的使用。