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EPR investigations of non‐oxidized silicon nanoparticles from thermal pyrolysis of silane
Author(s) -
Körmer Richard,
Otto Michael,
Wu Jia,
Jank Michael P. M.,
Frey Lothar,
Peukert Wolfgang
Publication year - 2011
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201105208
Subject(s) - electron paramagnetic resonance , silane , silicon , dangling bond , pyrolysis , nanoparticle , inert gas , materials science , particle (ecology) , inert , chemical engineering , thermal decomposition , thermal , chemistry , nanotechnology , organic chemistry , nuclear magnetic resonance , composite material , metallurgy , physics , oceanography , geology , meteorology , engineering
Electron paramagnetic resonance (EPR) investigations of non‐oxidized crystalline silicon nanoparticles (SiNP) from thermal silane pyrolysis revealed that the dangling bond (db) concentration strongly depends on the synthesis temperature. For SiNP synthesized at 1000‐1200 °C and processed entirely in inert atmosphere, approximately 10 13 cm ‐2 dbs were found which is at least one order of magnitude higher than the values previously reported for oxidized SiNP. After the synthesis, the dbs can be quenched by the addition of bromine (Br 2 ) that proves their location at the particle surface. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)