Surface-Enhanced Raman Scattering Using 2D Materials

abstract

The use of surface-enhanced Raman scattering (SERS) as a technique for detecting small amounts of (bio)chemical analytes has become increasingly popular in various fields. While gold and silver nanostructures have been extensively studied as SERS substrates, the availability of other types of substrates is currently expanding the applications of this spectroscopic method. Recently, researchers have begun exploring two-dimensional (2D) materials (e. g., graphene-like nanostructures) as substrates for SERS analysis. These materials offer unique optical properties, a well-defined structure, and the ability to modify their surface chemistry. As a contribution to advance this field, this concept article highlights the significance of understanding the chemical mechanism that underlies the experimental Raman spectra of chemisorbed molecules onto 2D materials' surfaces. Therefore, the article discusses recent advancements in fabricating substrates using 2D layered materials and the synergic effects of using their metallic composites for SERS applications. Additionally, it provides a new perspective on using Raman imaging in developing 2D materials as analytical platforms for Raman spectroscopy, an exciting emerging research area with significant potential. Raman spectroscopy and 2D materials: a perfect combination. Since graphene's SERS effect observation, 2D layered materials have been developed as active substrates for surface-enhanced Raman scattering (SERS). This perspective highlights the key concepts behind SERS spectroscopy and provides new insights into a new research field that combines the design of SERS 2D substrates using Raman spectroscopy and imaging. image

keywords

REDUCED GRAPHENE OXIDE; 2-DIMENSIONAL MATERIALS; CHEMICAL ENHANCEMENT; FACILE SYNTHESIS; CHARGE-TRANSFER; LAYER GRAPHENE; SINGLE-LAYER; SPECTROSCOPY; GOLD; NANOPARTICLES

subject category

Chemistry

authors

de Sousa, BP; Fateixa, S; Trindade, T

Groups

G1 - Porous Materials and Nanosystems

Projects

Collaboratory for Emerging Technologies, CoLab (EMERGING TECHNOLOGIES)

CICECO - Aveiro Institute of Materials (UIDB/50011/2020)

CICECO - Aveiro Institute of Materials (UIDP/50011/2020)

Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)

acknowledgements

This work was developed within the scope of the project CICECO - Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MCTES (PIDDAC) and when appropriate cofinanced by FEDER under the PT2020 Partnership Agreement. SF thanks FCT for her research contract (REF-069-88-ARH-2018), which is funded by national funds (OE) through FCT-Fundacao para a Ciencia e a Tecnologia, I.P., in the scope of the framework contract foreseen in the numbers 4, 5, and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19.