RT Journal Article
T1 Computational and Experimental Analysis of Gold Nanorods in Terms of Their Morphology: Spectral Absorption and Local Field Enhancement
A1 Núñez Leyva, Juan Manuel
A1 Kolosovas Machuca, Eleazar Samuel
A1 Sánchez, John Eder
A1 Guevara, Edgar
A1 Cuadrado Conde, Alexander
A1 Alda, Javier
A1 González, Francisco Javier
AB A nanoparticle’s shape and size determine its optical properties. Nanorods are nanoparticles that have double absorption bands associated to surface plasmon oscillations along their two main axes. In this work, we analize the optical response of gold nanorods with numerical simulations and spectral absorption measurements to evaluate their local field enhancement—which is key for surface-enhanced Raman spectroscopic (SERS) applications. Our experimental results are in good agreement with finite element method (FEM) simulations for the spectral optical absorption of the nanoparticles. We also observed a strong dependence of the optical properties of gold nanorods on their geometrical dimension and shape. Our numerical simulations helped us reveal the importance of the nanorods’ morphology generated during the synthesis stage in the evaluation of absorption and local field enhancement. The application of these gold nanorods in surface-enhancement Raman spectroscopy is analyzed numerically, and results in a 5.8×104 amplification factor when comparing the values obtained for the nanorod deposited on a dielectric substrate compared to the nanorod immersed in water.
PB MDPI
SN 2079-4991
YR 2021
FD 2021-06-28
LK https://hdl.handle.net/20.500.14352/8361
UL https://hdl.handle.net/20.500.14352/8361
LA eng
NO Received: 12 May 2021 / Accepted: 22 June 2021 / Published: 28 June 2021.
NO Ministerio de Ciencia e Innovación (MICINN)
NO Fondo Sectorial CONACYT-SENER- Sustentabilidad Energética
NO Terahertz Science and Technology National Lab (LANCYTT)
NO Centro Mexicano de Innovación en Energía Solar (CeMIE- Sol)
NO Consejo Nacional de Ciencia y Tecnología (Conacyt) (México)
DS Docta Complutense
RD 9 abr 2025