Photo-stimulus-responsive dual-emitting fluorescence of spiropyran-encapsulated carbon dots-functionalized silicon dioxide for dynamic information encryption
Source abstract
Abstract
开发刺激响应荧光材料对于解决信息安全的新兴需求至关重要. 本文中, 我们提出了一种刺激响应双发射荧光材料SP@SiO2-CDs (SP: 螺吡喃), 该材料是通过将螺吡喃化合物封装到碳点功能化的二氧化硅中得到的. 这种复合材料显示碳点在470 nm处发射蓝色光, 螺吡喃在620 nm处发射红色光. 在连续紫外光(365 nm)照射下, 螺吡喃分子经历从闭环到开环的过程, SiO2-CDs和异构部花青之间可以实现显著的荧光能量共振转移. SP@SiO2-CDs复合物粉末不仅可以在紫外光刺激下光致变色从黄色到粉色, 而且可以实现从淡蓝色到橙红色的双发射荧光转换. 当暴露在白光下时, 这种动态荧光行为可以完全恢复到初始状态. 基于荧光的时间依赖性, 本文成功开发了动态防伪图案和多重编码. 此外, 通过掺杂聚二甲基硅氧烷, 获得了具有高柔韧性和机械强度的薄膜, 并展示了其在高级信息加密中的应用. 该工作为提高离线便携式信息加密的安全性提供了一种新方法.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence and Fluorescent Materials · Carbon and Quantum Dots Applications · Nanocluster Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (52)
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