Nanofluids synthesis based on copper nanoparticles and silver nanostructures core@...
| Full text | |
| Author(s): |
Bressan, Lucas P.
[1]
;
Robles-Najar, Jessica
[2]
;
Adamo, Cristina B.
[1]
;
Quero, Reverson F.
[1]
;
Costa, Brenda M. C.
[1]
;
de Jesus, Dosil P.
[1]
;
da Silva, Jose A. F.
[1]
Total Authors: 7
|
| Affiliation: | [1] Univ Estadual Campinas, Chem Inst, BR-13083861 Campinas, SP - Brazil
[2] Univ Calif Riverside, Riverside, CA 92521 - USA
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Microchemical Journal; v. 146, p. 1083-1089, MAY 2019. |
| Web of Science Citations: | 1 |
| Abstract | |
For the first time, a 3D-printed microfluidic device based on fused deposition modeling was created using poly (lactic acid) as the 3D-printed part on top of a poly(methyl methacrylate) slide, allowing the creation of transparent microfluidic channels and used on the continuous-flow synthesis of silver and gold nanoparticles. In order to reduce fouling inside the microchannels, the device was optimized to use a segmented flow of mineral oil. The synthesized nanoparticles were characterized by UV-Visible spectroscopy and scanning and transmission electron microscopy. Silver nanoparticles were synthesized using different concentrations of sodium borohydride and flow rates of reactants (30 and 120 mu L min(-1)) at 20 degrees C, with sizes ranging from 5 +/- 2 nm to 8 +/- 3 nm and verified to be stable for at least three weeks. Subsequently, the silver nanoparticles were applied on measurement of gallic acid using a modified carbon paste electrode. Gold nanoparticles were synthesized at 90 degrees C varying the concentration of trisodium citrate and flow rates of reactants (40 and 100 mu L min(-1)), yielding sizes from 20 +/- 9 to 34 +/- 12 nm and verified to be stable for at least three weeks. Afterwards, the gold nanoparticles were employed in surfaced enhanced Raman scattering using crystal violet as model molecule. (AU) | |
| FAPESP's process: | 14/50867-3 - INCT 2014: National Institute of Science and Technology in Bioanalysis |
| Grantee: | Lauro Tatsuo Kubota |
| Support type: | Research Projects - Thematic Grants |
| FAPESP's process: | 14/50906-9 - INCT 2014: in Functional Complex Materials |
| Grantee: | Fernando Galembeck |
| Support type: | Research Projects - Thematic Grants |
| FAPESP's process: | 18/06478-3 - Use of 3D printing on the fabrication of microfluidic devices |
| Grantee: | José Alberto Fracassi da Silva |
| Support type: | Regular Research Grants |