Continuous segmented-flow synthesis of Ag and Au nanoparticles using a low-cost microfluidic PTFE tubing reactor
Language
en
Article de revue
This item was published in
IEEE Transactions on NanoBioscience. 2022, vol. 21, n° 1, p. 135-140
Institute of Electrical and Electronics Engineers
English Abstract
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, ...Read more >
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 ≈ 4 nm), while the synthesized Au nanoparticles exhibit LSPR and sizes in the range 520 - 550 nm and 14 - 17 nm, respectively.Read less <
English Keywords
Ag nanoparticles
Au nanoparticles
Flow synthesis
Microfluidics
Microfluidic synthesis
Noble metal nanoparticles
European Project
Microfluidic Approaches mimicking BIoGeological conditions to investigate subsurface CO2 recycling
Origin
Hal imported