Details

Autor(en) / Beteiligte

• Jariwala, Bhavin N
• Kramer, Nicolaas J
• Petcu, M. Cristina
• Bobela, David C
• Sanden, M. C. M. van de
• Stradins, Paul
• Ciobanu, Cristian V
• Agarwal, Sumit

Titel

Surface Hydride Composition of Plasma-Synthesized Si Nanoparticles

Ist Teil von

• Journal of physical chemistry. C, 2011-10, Vol.115 (42), p.20375-20379

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We have determined the surface hydride composition of amorphous and crystalline Si nanoparticles (NPs) (3–5 nm) synthesized in a low-temperature SiH4/Ar plasma using in situ attenuated total reflection Fourier-transform infrared spectroscopy and H2 thermal effusion measurements. With increasing power to the plasma source, the particles transition from amorphous to crystalline with a corresponding increase in the fraction of SiH species on the surface. The surface hydride composition indicates that Si NPs synthesized at higher plasma powers crystallize in the gas-phase due to a greater degree of plasma-induced heating, which enhances the desorption rates for SiH2 and SiH3. Furthermore, these Si NPs do not contain any detectable H in the bulk.