TY - JOUR
T1 - SERS study on the aggregation mechanisms resulting from the orientation of dipyridinic derivatives on gold nanoparticles
AU - Sánchez-González, Rodrigo
AU - Silva, Viviana
AU - Suazo, Constanza
AU - Soto, Juan Pablo
AU - Sanchez-Cortes, Santiago
AU - Campos-Vallette, Marcelo
AU - Leyton, Patricio
AU - Imbarack, Elizabeth
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/1/5
Y1 - 2022/1/5
N2 - In this work, was studied the adsorption and orientation of three dipyridinic derivatives 9,10-bis-((E)-2-(pyridin-4-yl)vinyl)anthracene (DPAC), 1,4-bis-((E)-2-(pyridin-4-yl)vinyl)naphthalene (DPNA-T) and 2,6-bis-((E)-2-(pyridin-4-yl)vinyl)naphthalene (DPNA-L) on gold nanoparticles, using Surface Enhanced Raman Scattering (SERS). Systematic modification in the shapes of the bifunctional systems (Cross-shape, T-shape and Linear-shape) shows changes significant in the preferential orientation of these analytes on the nanostructured gold surface. Additional data from UV–vis measurements and TEM images are in agreement with the Reaction Limited Colloid Aggregation (RLCA) mechanisms for DPAC and DPNA-T and Diffusion Limited Colloid Aggregation (DLCA) mechanisms for DPNA-L, showing that for the same analyte concentration, the aggregation mechanism depends on the molecular shape. These results allow us to rationalize the fundamental aspects involved in the development of devices based on plasmonic resonance with potential applications in the field of molecular electronics.
AB - In this work, was studied the adsorption and orientation of three dipyridinic derivatives 9,10-bis-((E)-2-(pyridin-4-yl)vinyl)anthracene (DPAC), 1,4-bis-((E)-2-(pyridin-4-yl)vinyl)naphthalene (DPNA-T) and 2,6-bis-((E)-2-(pyridin-4-yl)vinyl)naphthalene (DPNA-L) on gold nanoparticles, using Surface Enhanced Raman Scattering (SERS). Systematic modification in the shapes of the bifunctional systems (Cross-shape, T-shape and Linear-shape) shows changes significant in the preferential orientation of these analytes on the nanostructured gold surface. Additional data from UV–vis measurements and TEM images are in agreement with the Reaction Limited Colloid Aggregation (RLCA) mechanisms for DPAC and DPNA-T and Diffusion Limited Colloid Aggregation (DLCA) mechanisms for DPNA-L, showing that for the same analyte concentration, the aggregation mechanism depends on the molecular shape. These results allow us to rationalize the fundamental aspects involved in the development of devices based on plasmonic resonance with potential applications in the field of molecular electronics.
KW - DLCA
KW - Dipyridinic compounds
KW - Gold nanoparticles
KW - RLCA
KW - SERS
UR - http://www.scopus.com/inward/record.url?scp=85113342090&partnerID=8YFLogxK
U2 - 10.1016/j.saa.2021.120286
DO - 10.1016/j.saa.2021.120286
M3 - Article
AN - SCOPUS:85113342090
SN - 1386-1425
VL - 264
JO - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
JF - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
M1 - 120286
ER -