红外量子点材料的远距离识别

量子点分立的能级结构使其具有独特的光电性质，因而在激光能源、光电检测等领域应用广泛。其尺寸调谐的受激辐射特性与灵活多变的应用形态也使其成为一种理想的荧光标记材料，在生物医学、微观物质检测以及防伪与目标识别等领域备受关注。对于应用场景多为宏观自然环境的防伪与目标识别领域，不可避免地需要对红外波段的量子点荧光进行较远距离的检测与分析。因此，文中基于微弱信号检测技术设计构建了一套红外量子点荧光的远距离探测系统，并用其对PbS胶质量子点薄膜荧光进行了检测实验。实验结果及分析表明，波长~1300 nm的红外量子点荧光辐射可以在100~200 m距离之外被系统有效提取，从而实现红外量子点材料的远距离识别。系统对荧光特性的检测结果用于分析和指导不同红外量子点材料的制备过程，也将推动其远距离识别应用的多样性发展。

Long-distance recognition of infrared quantum dot materials

Quantum dots are widely used in laser energy, photoelectric detection and other fields due to its unique photoelectric properties. Its size-dependent stimulated emission and flexible application form also make it an ideal fluorescent labeling material, which has attracted much attention in the fields of biomedicine, micromaterial detection, anti-counterfeiting and target recognition. In the field of anti-counterfeiting and target recognition where the application scenes are mostly macro natural environments, it is inevitable to detect and analyze the infrared fluorescence of quantum dots at a relatively long distance. Therefore, a long-distance detection system of infrared fluorescence for quantum dot was established based on weak signal detection technology and used to detect the fluorescence of PbS colloidal quantum dot films. The effective detection range of the fluorescence at 1300 nm for the samples was over 100-200 meters and may increase further. This meant that long-distance recognition of infrared quantum dot materials was realized. The detection results can be used to analyze and guide the preparation process of different infrared quantum dot materials, which will also promote the diversified development of their remote recognition applications.