具有可编程形态的准三维金纳米蘑菇用于制备高容量柔性等离激元编码

Quasi-3-D Au mushrooms with programmable morphology for high-capacity flexible plasmonic encoding

由金属纳米结构组成的等离激元编码在信息加密的实际应用中做出了巨大贡献.然而,由于在单一平台上排列集成水平较高的多元纳米结构的技术难度较大,目前大多数报道只展示了单一或二元等离激元编码的制备,这无法满足日益提高的信息安全性对于高编码容量的要求.在此,我们开发了一种基于等离子体刻蚀-生长的策略,制备了具有可控形态的准三维等离激元金纳米蘑菇的图案阵列,并通过将这些纳米蘑菇排列在一个基底上,成功实现了理想的高容量等离激元编码.在此基础上,将这种多元编码转移到柔性基板上,实现了对代表“FUNSOM”的摩斯密码的三模态加密,展示了开发的等离激元编码在信息加密和数据存储等领域的广阔应用前景.

Plasmonic encoding composed of metallic nanostructures makes a great contribution to the practical application of information encryption.However,most reports have so far shown the preparation of single or binary plasmonic encoding patterns because of the technical difficulty of assembling multiplex nanostructures on a single platform,which cannot satisfy the requirements of high encoding capacity for increasing information security.Herein,we developed a strategy based on plasma etching combined with in-situ growth to fabricate patterned arrays of quasi-three-dimensional(3-D)plasmonic Au nano-mushrooms with controlled morphologies,and successfully realized ideal high-capacity plasmonic encoding by arranging Au nano-mushrooms on one platform.On this basis,such multiplex encoding patterns have been transferred to the flexible substrate to realize the triple-mode encryption of the Morse code of"FUNSOM",indicating great prospects in the applications of information encryption and data storage.