TY - JOUR
T1 - Ultra-small gold particles via Citrus × sinensis
T2 - Theoretical and experimental SERS study
AU - López-Vázquez, L. F.
AU - Ramírez-Rodríguez, L. P.
AU - Pérez-Rodríguez, A.
AU - Britto Hurtado, R.
AU - Cabellos, J. L.
AU - Vargas-Ortiz, R. A.
AU - Navarro-Badilla, A.
AU - Roldan, Manuel A.
AU - Cortez-Valadez, M.
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/9
Y1 - 2023/9
N2 - In this study, we have addressed the green synthesis of sub-nanostructured gold species using Citrus × sinensis. Absorption bands in the ultraviolet region (338 nm) were observed. Analysis by atomic resolution microscopy revealed the identification of sub-nanostructured Au species with particle sizes of about 0.9 nm. With favorable results, these systems were tested as substrates for surface-enhanced Raman spectroscopy (SERS) using pyridine. The chemical enhancement mechanism was studied as the source of the SERS effect. Complementarily, the interaction between gold clusters (Au2n, with n = 1–5) and pyridine was modeled using Density Functional at the Becke-3-parameter-Lee-Yang-Parr level of approximation in combination with the LANL2DZ basis set. A correlation between the adsorption energy and the SERS enhancement factor was analyzed as a function of the Au-N interaction distance.
AB - In this study, we have addressed the green synthesis of sub-nanostructured gold species using Citrus × sinensis. Absorption bands in the ultraviolet region (338 nm) were observed. Analysis by atomic resolution microscopy revealed the identification of sub-nanostructured Au species with particle sizes of about 0.9 nm. With favorable results, these systems were tested as substrates for surface-enhanced Raman spectroscopy (SERS) using pyridine. The chemical enhancement mechanism was studied as the source of the SERS effect. Complementarily, the interaction between gold clusters (Au2n, with n = 1–5) and pyridine was modeled using Density Functional at the Becke-3-parameter-Lee-Yang-Parr level of approximation in combination with the LANL2DZ basis set. A correlation between the adsorption energy and the SERS enhancement factor was analyzed as a function of the Au-N interaction distance.
KW - Charge transfer
KW - Chemical enhancement mechanism
KW - Surface enhancement Raman spectroscopy effect
KW - Ultra-small gold species
UR - http://www.scopus.com/inward/record.url?scp=85160783505&partnerID=8YFLogxK
U2 - 10.1016/j.mseb.2023.116617
DO - 10.1016/j.mseb.2023.116617
M3 - Artículo
AN - SCOPUS:85160783505
SN - 0921-5107
VL - 295
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
M1 - 116617
ER -