Effect of Monomers and Multimers of Gold Nanostars on Localized Surface Plasmon Resonance and Field Enhancement

被引：2
作者：
Sharma, Chhaya [1 ]
Katyal, Jyoti [1 ]
Deepanshi [1 ]
Singh, Rina [2 ]
机构：
[1] Amity Univ, Amity Inst Appl Sci, Noida, India
[2] CRRI CSIR, New Delhi, India
来源：
PLASMONICS | 2023年 / 18卷 / 06期
关键词：
Nanostar; Localized surface plasmon resonance; Refractive index-based sensor; Field enhancement; NANOSTRUCTURES;
D O I：
10.1007/s11468-023-01941-7
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper, we present the theoretical modeling of gold nanostar for localized surface plasmon resonance-based sensor application and SERS over red to NIR region. Au nanostars exhibiting LSPR peak over 1400 nm were considered in isolated and multimer configuration. The refractive index sensitivity for all configurations was measured, and nanostars exhibit the RIS factor up to 1175 nm/RIU. The effect of interacting nanostars on LSPR and field enhancement was studied by considering multimer configuration forming quadrumer, rhombus, crown, and closed loop nanostructure. The quadrumer, rhombus, and crown pattern points exhibit the highest near-field intensity. In general, the near-field energy localization and plasmon resonance wavelengths of the structure can be considerably influenced by the configuration of nanostars.
引用
收藏
页码：2235 / 2245
页数：11
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