Octahedron in a Cubic Nanoframe: Strong Near-Field Focusing and Surface-Enhanced Raman Scattering,ACS Nano

当前位置： X-MOL 学术 › ACS Nano › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Octahedron in a Cubic Nanoframe: Strong Near-Field Focusing and Surface-Enhanced Raman Scattering
ACS Nano ( IF 15.8 ) Pub Date : 2024-02-28 , DOI: 10.1021/acsnano.4c00734
Myeong Jin Oh ₁ , Sunwoo Kwon ₁ , Sungwoo Lee _{1,

2} , Insub Jung _{1,

2} , Sungho Park ₃

Affiliation

Here, we describe the synthesis of a plasmonic particle-in-a-frame architecture in which a solid Au octahedron is enclosed by a Au cubic nanoframe. The octahedra are positioned inside and surrounded by outer Au cubic nanoframes, creating intra-nanogaps within a single entity. Six sharp vertexes in the Au octahedra point toward the open (100) facets of the cubic nanoframes. This allows not only efficient interactions with the surroundings but also tip-enhanced electromagnetic near-field focusing at the sharp tips of the octahedra, combined with intraparticle coupling. The solid core–frame shell structure enhances near-field focusing, giving rise to a heightened concentration of “hot spots”. This effect enables highly sensitive detection of 2-naphthalenethiol and thiram, indicating these substrates for use in surface-enhanced Raman spectroscopy-related applications.

中文翻译：

立方纳米框架中的八面体：强近场聚焦和表面增强拉曼散射

在这里，我们描述了框架中等离子体粒子结构的合成，其中固体金八面体被金立方纳米框架包围。八面体位于内部，并被外部金立方纳米框架包围，在单个实体内形成内部纳米间隙。 Au 八面体中的六个尖锐顶点指向立方纳米框架的开放面 (100)。这不仅可以实现与周围环境的有效相互作用，还可以在八面体的尖锐尖端处进行尖端增强电磁近场聚焦，并与颗粒内耦合相结合。坚固的核心-框架外壳结构增强了近场聚焦，从而提高了“热点”的集中度。这种效应使得能够对 2-萘硫醇和福美双进行高度灵敏的检测，表明这些底物可用于表面增强拉曼光谱相关的应用。

更新日期：2024-02-28

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南