Work

Design and Experimental Demonstration of Pyramidal SERS Substrates with High-Throughput Fabrication Method

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide Surface-enhanced Raman spectroscopy (SERS) is a technique based on the Raman scattering effect that provides rapid, label-free identification capabilities with very high sensitivity and specificity down to the molecular level. Due to the nature of the applications, not only are sensitivity and specificity important, but also the reproducibility of substrates is a key aspect. In this study, a design methodology for arrays of pyramid-shaped gold nanostructures is presented along with the development of a fabrication process that enables high-throughput substrate production. Using simulations of the 3D finite element method, SERS substrates with theoretical enhancement factors on the order of 10 8 have been obtained. SERS experiments with the fabricated structures resulted in an enhancement of approximately 1500% compared to flat gold substrates. The thorough investigation of the structure, allied with a novel fabrication process that eliminates the need for complex and time-consuming lithography steps for each individual substrate, paves the way for an efficient method to produce high-quality SERS substrates.

Source: ACS Omega

DOI: 10.1021/acsomega.4c11431

Authors: Fabiano C. Santana, Yuri H Isayama, Rafael S. Gonçalves, Felipe M. F. Teixeira, Jhonattan C Ramirez, Wagner N. Rodrigues

Institution: Universidade Federal de Minas Gerais

Language: English

Topic: Gold and Silver Nanoparticles Synthesis and Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,935

Funders: Financiadora de Estudos e Projetos, Fundação de Amparo à Pesquisa do Estado de Minas Gerais