摘要
The realization of plasmonic structures generally necessitates expensive fabrication techniques, such as electron beam and focused ion beam lithography, allowing for the top-down fabrication of low-dimensional structures. Another approach to make plasmonic structures in a bottom-up fashion is colloidal synthesis, which is convenient for liquid-state applications or very thin solid films where aggregation problems are an important challenge. The architectures prepared using these methods are typically not robust enough for easy handling and convenient integration. Therefore, developing a new plasmonic robust platform having large-scale dimensions without adversely affecting the plasmonic features is in high demand. As a solution, here we present a new plasmonic composite structure consisting of gold nanoparticles （Au NPs） incorporated into sucrose macrocrystals on a large scale, while preserving the plasmonic nature of the Au NPs and providing robustness in handling at the same time. As a proof of concept demonstration, we present the fluorescence enhancement of green CdTe quantum dots （QDs） via plasmonic coupling with these Au NPs in the sucrose crystals. The obtained composite material exhibits centimeter scale dimensions and the resulting quantum efficiency （QE） is enhanced via the interplay between the Au NPs and CdTe QDs by 58% （from 24% to 38%）. Moreover, a shortening in the photoluminescence lifetime from 11.0 to 7.40 ns, which corresponds to a field enhancement factor of 2.4, is observed upon the introduction of Au NPs into the QD incorporated macrocrystals. These results suggest that such ＂sweet＂ plasmonic crystals are promising for large-scale robust platforms to embed plasmonic nanoparticles.
plasmonic 结构的实现通常要求昂贵的制造技术，例如电子横梁和集中的离子横梁平版印刷术，允许低维的结构的自顶向下的制造。以一种自底向上的方式做 plasmonic 结构的另一条途径是胶体的合成，它对液体状态应用或聚集问题是重要挑战的很薄的稳固的电影方便。用这些方法准备的体系结构典型地不为容易的处理和方便集成是足够柔韧的。因此，开发没有不利地影响 plasmonic，有大规模尺寸的柔韧的站台展示的新 plasmonic 在高需求。作为一个答案，这里我们在场合成结构由金 nanoparticles (Au NP ) 组成在大规模上合并了到蔗糖 macrocrystals 的新 plasmonic，当保存 Au NP 的 plasmonic 性质并且在同时处理提供坚韧性时。作为概念示范的一个证明，我们在场经由在蔗糖晶体结合这些 Au NP 的 plasmonic 的绿 CdTe 量点(QD ) 的荧光改进。获得的合成材料展览厘米规模尺寸和产生的量效率(QE ) 被 58% 经由在 Au NP 和 CdTe QD 之间的相互影响提高(从 24% ～ 38%) 。而且，一从 11.0 ～ 7.40 在光致发光一生弄短 ns，对应于 2.4 的一个地改进因素，在 Au NP 的介绍之上被观察进 QD 合并 macrocrystals。这些结果建议如此的香甜的 plasmonic 晶体是有希望的让大规模柔韧的平台嵌入 plasmonic nanoparticles。
