Naslov
Development of silicon nanowires based on Ag-Au metal alloy seed system for sensing technologies

Autori
Gebavi, Hrvoje ; Ristić, Davor ; Baran, Nikola ; Marciuš, Marijan ; Gašparić, Vlatko ; Syed, Kamran ; Ivanda, Mile

Izvornik
Sensors and actuators. A, Physical (0924-4247) 331 (2021); 112931, 8

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Vapour–liquid–solid (VLS) method ; Low-pressure chemical vapour deposition (LPCVD) ; Ag-Au alloy catalyst ; Surface-enhanced Raman spectroscopy (SERS) ; substrates design ; Si nanowires ; Mercaptophenylboronic acid (MPBA)

Sažetak
This paper shows the optimisation of the silicon nanowires (SiNWs) synthesis process and their features which are relevant for numerous sensing applications. In particular, the target was to design SiNWs substrate for surface-enhanced Raman spectroscopy (SERS). The majority of SiNWS has been synthesized by vapour-liquid-solid (VLS) method utilizing Au catalyst. However, in this paper, we show that Ag-Au catalyst system offers advantageous features such as a higher number of SiNWs per unit area, reduced SiNWs thickness and improved diameter distribution. The novel SERS sensor was tested utilizing Mercaptophenylboronic acid (MPBA) and compared with the traditional only Au catalysed system. Furthermore, the SiNWs features based on novel Ag-Au catalyst system were varied employing temperature, SiH4 partial pressure and deposition time. Axial and radial SiNWs growth rates and activation energies are determined and discussed.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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