Green Synthesis up to Geometric Gold Microparticles
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Green Synthesis up to Geometric Gold Microparticles M. Cortez‑Valadez1 · L. P. Ramírez‑Rodríguez2 · F. Martínez‑Suarez3 · R. A. Vargas‑Ortiz4 · F. F. Castillón‑Barraza5 · M. Flores‑Acosta6 Received: 14 July 2020 / Accepted: 20 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this work the study of optical properties of micro and nanostructured particles of gold is approached. A method of nanoparticle stabilization synthesis based on the philosophy of green chemistry by using orange extract (Citrus X sinensis) was proposed. Controlling specific parameters of the proposed synthesis method, particles with sizes lower than 50 nm were obtained and after the heat treatment the geometric particle sizes ranged from 0.2 to 2 μm. The optical absorption of the particles was studied finding absorption bands associated with the surface plasmon resonance. Experimentally, the nanomaterials obtained were tested on pyridine as SERS substrate. Complementary, in order to find clues of vibrational behavior, theoretically the interaction with pyridine molecule and gold layer structure were considered. The individual systems were perturbed by incident radiation with blue (435 nm), green (532 nm), red (638 nm) and infrared (785 nm and 1064) wavelengths for its SERS analysis. Keywords Gold micro-nanoparticles · SERS effect · Green synthesis · Citrus X sinensis
1 Introduction
* M. Cortez‑Valadez [email protected] * F. F. Castillón‑Barraza [email protected] 1
CONACYT‑Departamento de Investigación en Física, Universidad de Sonora, Apdo. Postal 5‑88, 83190 Hermosillo, Sonora, Mexico
2
Departamento de Física, Universidad de Sonora, Rosales y Luis Encinas S/N, C.P. 83000 Hermosillo, Sonora, Mexico
3
CENAM, Centro Nacional de Metrología, km 4.5 Carretera a Los Cués, El Marqués, C.P. 76246 Santiago de Querétaro, QRO, Mexico
4
Universidad Autónoma de Sinaloa, Fuente de Poseidón y Prol. Ángel Flores S/N, C.P. 81223 Los Mochis, Sinaloa, Mexico
5
Departamento de Nanocatálisis, Centro de Nanociencias y Nanotecnología (CNyN), Universidad Nacional Autónoma de México, Carretera Tijuana‑Ensenada, Km. 107, Ensenada, Baja California, Mexico
6
Departamento de Investigación en Física, Universidad de Sonora, Apdo. Postal 5‑88, 83190 Hermosillo, Sonora, Mexico
The micro and nanostructured systems show a growth in their applications among which the bactericidal properties, drug supply, biomarkers, SERS sensors and catalysis, can be highlighted [1–3]. A key element in the development and design of these applications is the size and morphology of the particles. Synthesis methods that achieve a mechanism of size and morphology control over the particles have a great acceptance in the scientific community. Outstanding results in this direction are presented by Silvia Barbosa et al., who managed to control particle sizes between 5 and 30 nm [4] Other results are presented by Yan Dou and collaborators who managed to control particles with irregular morphologies, with sizes between
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