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银纳米立方体表面铂络合对表面等离子体共振的调制

Surface Plasmon Resonance Modulation by Complexation of Platinum on the Surface of Silver Nanocubes.

作者信息

Huri Avi, Mandelbaum Yaakov, Rozenberg Mike, Muzikansky Anya, Zysler Melina, Zitoun David

机构信息

Department of Chemistry and Bar Ilan Institute of Nanotechnology and Advanced Materials (BINA), Bar Ilan University, Ramat Gan 5290002, Israel.

Department of Applied Physics/Electro-Optics Engineering, Advanced Lab for Electro-Optics Simulations (ALEO), Lev Academic Center, Jerusalem 9116001, Israel.

出版信息

ACS Omega. 2024 Aug 5;9(33):35526-35536. doi: 10.1021/acsomega.4c02150. eCollection 2024 Aug 20.

DOI:10.1021/acsomega.4c02150
PMID:39184479
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11339983/
Abstract

The use of plasmonic particles, specifically, localized surface plasmonic resonance (LSPR), may lead to a significant improvement in the electrical, electrochemical, and optical properties of materials. Chemical modification of the dielectric constant near the plasmonic surface should lead to a shift of the optical resonance and, therefore, the basis for color tuning and sensing. In this research, we investigated the variation of the LSPR by modifying the chemical environment of Ag nanoparticles (NPs) through the complexation of Pt(IV) metal cations near the plasmonic surface. This study is carried out by measuring the shift of the plasmon dipole resonance of Ag nanocubes (NCs) and nanowires (NWs) of differing sizes upon coating the Ag surface with a layer of polydopamine (PDA) as a coordinating matrix for Pt(IV) complexes. The red shift of up to 45 nm depends linearly on the thickness of the PDA/Pt(IV) layer and the Pt(IV) content. Additionally, we calculated the dielectric constant of the surrounding medium using a numerical method.

摘要

使用等离子体粒子，具体而言是局域表面等离子体共振（LSPR），可能会显著改善材料的电学、电化学和光学性质。等离子体表面附近介电常数的化学修饰应会导致光学共振的移动，从而成为颜色调节和传感的基础。在本研究中，我们通过在等离子体表面附近使Pt(IV)金属阳离子络合来改变Ag纳米颗粒（NP）的化学环境，进而研究LSPR的变化。本研究通过测量不同尺寸的Ag纳米立方体（NC）和纳米线（NW）在Ag表面涂覆一层聚多巴胺（PDA）作为Pt(IV)配合物的配位基质时等离子体偶极共振的移动来进行。高达45 nm的红移与PDA/Pt(IV)层的厚度和Pt(IV)含量呈线性关系。此外，我们使用数值方法计算了周围介质的介电常数。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4eb/11339983/69ec3691e7a4/ao4c02150_0009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4eb/11339983/ee0ea69213df/ao4c02150_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4eb/11339983/cd6794c453c9/ao4c02150_0006.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b4eb/11339983/69ec3691e7a4/ao4c02150_0009.jpg

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