Microfluidic setup for on-line SERS monitoring using laser induced nanoparticle spots as SERS active substrate
| Autor: | Jörg Nestler, Nicolae Leopold, Dietrich R. T. Zahn, Ovidiu D. Gordan, Oana-M Buja, Andreas Morschhauser |
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| Přispěvatelé: | Publica |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
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silver nanoparticles Materials science Analytical chemistry General Physics and Astronomy Nanoparticle malachite green 02 engineering and technology lcsh:Chemical technology 01 natural sciences lcsh:Technology Silver nanoparticle Full Research Paper law.invention chemistry.chemical_compound microfluidic setup law Desorption Nanotechnology General Materials Science lcsh:TP1-1185 Electrical and Electronic Engineering lcsh:Science SERS lcsh:T 010401 analytical chemistry Substrate (chemistry) 021001 nanoscience & nanotechnology Laser lcsh:QC1-999 0104 chemical sciences Silver nitrate Nanoscience chemistry Colloidal gold gold nanoparticles lcsh:Q 0210 nano-technology lcsh:Physics |
| Zdroj: | Beilstein Journal of Nanotechnology, Vol 8, Iss 1, Pp 237-243 (2017) Beilstein Journal of Nanotechnology |
| Popis: | A microfluidic setup which enables on-line monitoring of residues of malachite green (MG) using surface-enhanced Raman scattering (SERS) is reported. The SERS active substrate was prepared via laser induced synthesis of silver or gold nanoparticles spot on the bottom of a 200 μm inner dimension glass capillary, by focusing the laser beam during a continuous flow of a mixture of silver nitrate or gold chloride and sodium citrate. The described microfluidic setup enables within a few minutes the monitoring of several processes: the synthesis of the SERS active spot, MG adsorption to the metal surface, detection of the analyte when saturation of the SERS signal is reached, and finally, the desorption of MG from the spot. Moreover, after MG complete desorption, the regeneration of the SERS active spot was achieved. The detection of MG was possible down to 10−7 M concentration with a good reproducibility when using silver or gold spots as SERS substrate. |
| Databáze: | OpenAIRE |
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