Abstract：
To enhance the stability of Raman reporters, these reporters were trapped in a metal organic framework (MOF) exoskeleton that was grown and compressed on Fe3O4@Au core-satellites, producing recyclable surface-enhanced Raman scattering (SERS) nanotags. Furthermore, encapsulation of Raman reporters in the assembled MOF-based nanocomposites was divided into two types of patterns, pre-enrichment and post-enrichment, in order to disentangle chemical enhancement of charge transfer (CT) from electromagnetic enhancement (EM) in SERS. Hence, to demonstrate the effect of encapsulation, a typical non-thiolated Raman reporter, for example crystal violet (CV) trapped in a core-satellite nanoassembly-based zeolitic imidazolate framework (ZIF-8) shell, was selected. The results suggest that stability and Raman intensity are remarkably improved. Moreover, the pattern of incorporation of CV into the ZIF-8 shell with tunable shell thickness can contribute to the disentangling of CT effects from EM effects.
摘要：
为了提高拉曼报道分子的稳定性，将这些报道分子捕获到在Fe3O4@Au核心卫星上生长和压缩的金属有机框架（MOFs）外骨骼中，以制造可回收的SERS纳米标签。此外，组装的MOFs基纳米复合材料中的拉曼报道分子的封装已分为两种模式，即，富集前和富集后，用于从表面增强拉曼散射（SERS）中的电磁增强（EM）中解开电荷转移（CT）的化学增强。因此，为了证明封装效果，典型的非硫醇化拉曼报告基因,例如，结晶紫（CV）被困在核心卫星纳米组装基沸石咪唑酯框架（ZIF-8）壳，结果表明，其稳定性和拉曼强度得到了显著提高。此外，CV掺入具有可调壳厚度的ZIF-8壳中的模式可以促进从EM效应中解开CT效应。
