Abstract
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.
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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Chhaya Sharma had done the simulations and wrote the manuscript text. She had collected the data and plotted the graph. Dr. Jyoti Katyal devised the idea and helped while preparing and supervising the final draft. Deepanshi contributed in simulation and plotting graph. and paper editing was done by Dr. Rina Singh.
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Sharma, C., Katyal, J., Deepanshi et al. Effect of Monomers and Multimers of Gold Nanostars on Localized Surface Plasmon Resonance and Field Enhancement. Plasmonics 18, 2235–2245 (2023). https://doi.org/10.1007/s11468-023-01941-7
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DOI: https://doi.org/10.1007/s11468-023-01941-7