Pregled bibliografske jedinice broj: 748684
Synthesis and characterization of silver colloidal nanoparticles with different coatings for SERS application
Synthesis and characterization of silver colloidal nanoparticles with different coatings for SERS application // Journal of nanoparticle research, 16 (2014), 2748-1 doi:10.1007/s11051-014-2748-9 (međunarodna recenzija, članak, znanstveni)
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Naslov
Synthesis and characterization of silver colloidal nanoparticles with different coatings for SERS application
Autori
Mikac, Lara ; Ivanda, Mile ; Gotić, Marijan ; Mihelj, Tea ; Horvat, Lucija
Izvornik
Journal of nanoparticle research (1388-0764) 16
(2014);
2748-1
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Aggregating agents; Colloid; Pyridine; Reducing agents; SERS; Silver nanoparticles
Sažetak
Silver colloids were produced by chemical reduction of silver salt (silver nitrate, AgNO3) solution. As reducing agents, trisodium citrate, sodium borohydride, ascorbic acid, polyvinylpyrrolidone, and glucose were used. The colloids were characterized by UV–Vis, DLS, zeta potential measurements, and SEM. The colloids were stabilized with negative groups or large molecules attached to their surface. The surface-enhanced Raman scattering (SERS) effect of stabilized nanoparticles was measured by using pyridine and rhodamine 6G molecules as analytes and NaNO3, KCl, and KBr at different concentrations as aggregating agents. The best Raman signal enhancement was achieved using silver nanoparticles of 40 nm size reduced and stabilized with citrate. The SERS signal of analyte molecules was further enhanced with the addition of sodium borohydride as an alternative aggregating agent. The borohydride had the strongest impact on the SERS effect of the colloid consistent of large (0.5 µm) silver nanoparticles stabilized with aminodextran. The mixture colloid-borohydride-pyridine was stable for hours. The mechanism of borohydride in the colloids is discussed.
Izvorni jezik
Engleski
Znanstvena područja
Fizika, Kemija
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus