Naslov
Preparation and characterization of SERS substrates: from colloids to solid substrates

Autori
Mikac, Lara ; Ivanda, Mile ; Gotić, Marijan ; Ristić, Davor ; Đerek, Vedran ; Gebavi, Hrvoje ; Gucciardi, Pietro Giuseppe ; D'Andrea, Cristiano

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
MIPRO2015, Proceedings / - , 2015

Skup
38th International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO)

Mjesto i datum
Opatija, Hrvatska, 25.05.2015. - 29.05.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Raman; SERS; substrate; silver

Sažetak
Surface enhanced Raman spectroscopy is an important technique for detection of wide number of analytes. Today, there is a growing need for the development of stable, sensitive, reproducible and portable SERS-active substrates for use in different fields. Some of the most extensively used SERS substrates are metal colloids. However, the use of the colloid solutions for SERS deals with important issues, like stability and reproducibility. Other popular types of substrates are rough or nanoporous surfaces, such as porous silicon, coated with noble metals. Porous silicon (pSi) is a semiconducting material typically obtained by electrochemical etching in hydrofluoric acid (HF). Due to its high surface-to-volume ratio pSi is an interesting material for photonic and sensing devices, drug delivery systems as well as for use in SERS. In this paper, attempts are made to prepare a stable and uniform noble metal colloidal solution as well as solid substrate using porous silicon (pSi) with deposited silver and gold nanostructures. SERS substrates obtained by different methods are evaluated for SERS efficiency using methylene blue and rhodamine 6G (R6G) at 514.5 and 633 nm. The prepared substrates showed good stability and reproducibility. For some substrates the concentrations detected were below nanomolar range.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA