Synthesis of blue luminescent si nanoparticles using atmospheric-pressure microdischarges.
Silicon nanoparticles are synthesized from a mixture of argon/silane in a continuous flow atmospheric-pressure microdischarge reactor. Particles nucleate and grow to a few nanometers (1-3 nm) in diameter before their growth is abruptly terminated in the short residence time microreactor. Narrow size distributions are obtained as inferred from size classification and imaging. As-grown Si nanoparticles collected in solution exhibit room-temperature photoluminescence that peaks at 420 nm with a quantum efficiency of 30%; the emission is stable for months in ambient air.
Sankaran
R Mohan
RM
Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.
Holunga
Dean
D
Flagan
Richard C
RC
Giapis
Konstantinos P
KP
D003116:Color; D003460:Crystallization / Q000379:methods*; D004563:Electrochemistry / Q000379:methods*; D008027:Light; D049408:Luminescent Agents / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D011312:Pressure; D012825:Silicon / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects
D049408:Luminescent Agents; D012825:Silicon