期刊
IEEE TRANSACTIONS ON NANOBIOSCIENCE
卷 21, 期 1, 页码 135-140出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNB.2021.3101189
关键词
Nanoparticles; Gold; Oils; Chemicals; Silicon; Inductors; Nanobioscience; Ag nanoparticles; Au nanoparticles; Flow synthesis; Microfluidics; Microfluidic synthesis; Noble metal nanoparticles
资金
- Consejo Nacional de Ciencia y Tecnologia ofMexico (CONACYT) [713466]
- European Research Council (ERC) through the European Union [725100]
- [CB-2017-2018-A1-S-39049]
- European Research Council (ERC) [725100] Funding Source: European Research Council (ERC)
A simple and low-cost continuous segmented-flow process for the synthesis of Ag and Au spherical-shaped nanoparticles is presented. The flow conditions have opposite effects on the synthesis of Ag and Au nanoparticles, with low residence times improving Ag nanoparticle production and high residence times improving Au nanoparticle synthesis yield and quality.
We present in here a simple and low cost continuous segmented-flow process for the synthesis of Ag and Au spherical-shaped nanoparticles. Different residence times (RT) were used to perform the nanoparticle synthesis, observing that at low RT, the Ag nanoparticles production, which uses a fast reduction reaction with NaBH4, is improved due to an enhancement in the mixing of the reactants. However, the flow conditions have an opposite effect in the case of Au nanoparticles synthesis. Indeed, since the chemical reduction process (Turkevich method) exhibit a much slower kinetics, high RT (low flowrates) improve the synthesis yield and the quality of the nanoparticles. The Ag and Au nanoparticles were characterized by UV-Vis spectrophotometry (UV-Vis) and Transmission Electron Microscopy (TEM). The Ag spherical-shaped nanoparticles presented a LSPR at 400 nm (size approximate to 4 nm), while the synthesized Au nanoparticles exhibit LSPR and sizes in the range 520 - 550 nm and 14 - 17 nm, respectively.
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