Naslov
SERS active Ag nanoparticles deposited on porous silicon: ultra-small concentration detection of Rhodamine

Autori
Kosović, Marin ; Gamulin, Ozren ; Balarin, Maja ; Ivanda, Mile ; Ðerek, Vedran ; Marciuš, Marijan

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
XXIV. International Conference on Raman Spectroscopy Conference Proceedings / Popp, Jürgen ; Deckert, Volker - Jena : Leibniz Institute of PhotonicTechnology e.V. (IPHT), 2014, 1414-1415

Skup
XXIV. International Conference on Raman Spectroscopy

Mjesto i datum
Jena, Njemačka, 10.08.2014. - 15.08.2014

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
SERS; porous silicon; plasmonics; Raman enhancement

Sažetak
Porous silicon (pSi) is nanostructured material obtained by anodisation of crystalline silicon. Recently it appeared to be promising material for the fabrication of surface enhanced Raman spectroscopy (SERS) active substrates. Silver nanostructures (Ag-pSi) in the range 10-150 nm were synthesized by immersing pSi samples into 10^-2 M silver nitrate (AgNO3). UV/VIS/NIR total reflectance spectrum showed broad surface plasmon peak minimum of Ag nanostructures at 471 nm. Ag- pSi samples are then incubated in Rhodamine (R6G) aqueous solution with 10-5 to 10-15M concentrations and then dried in air. Micro Raman spectra were recorded with 514.5 nm Ar+ laser. Detection limit of R6G solution was at 10^-7 M concentration. At concentrations below 10^-7 M recorded spectra showed broad background which overwhelms the Raman signal of R6G caused probably by carbon species. Moving the laser beam across the sample, while recording spectra, increased the senistvity and 10^-15 M R6G concentration detection limit was obtained.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA