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Organo‐Functionalization of Silicon Nanocrystals Synthesized by Inductively Coupled Plasma Chemical Vapor Deposition
Author(s) -
Lee DonSung,
Choe DongHoe,
Yoo SeungWan,
Kim JungHyung,
Jeong HyunDam
Publication year - 2016
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.10758
Subject(s) - inductively coupled plasma , silicon , chemical vapor deposition , surface modification , analytical chemistry (journal) , scanning electron microscope , fourier transform infrared spectroscopy , infrared spectroscopy , chemistry , materials science , chemical engineering , nanotechnology , organic chemistry , plasma , physics , quantum mechanics , engineering , composite material
Octadecyl‐terminated silicon nanocrystals ( ODE ‐Si NCs ) are obtained via a surface‐initiated thermal hydrosilylation reaction on hydride‐terminated Si NCs (HSi NCs ). Pristine Si NCs were synthesized at the gram scale by using inductively coupled plasma chemical vapor deposition ( ICP‐CVD ). The HSi NCs were produced through a chemical etching process with hydrofluoric acid ( HF ), ethanol ( EtOH ), and distilled water (d‐ H 2 O ). The results obtained from X‐ray diffraction ( XRD ) and field emission scanning electron microscopy ( FE‐SEM ) indicate that the synthesized Si NCs obtained via ICP‐CVD have diamond cubic‐structured silicon with a grain size of 10 nm and a densely packed Si NC array consisting of individual NCs . Organo‐functionalized Si NCs , i.e. , ODE ‐Si NCs , are well soluble in organic solvent whereas pristine Si NCs synthesized through ICP‐CVD are not. The surface chemistry of the ODE ‐Si NCs was confirmed via Fourier transform infrared spectroscopy ( FT‐IR ), proton nuclear magnetic resonance spectroscopy ( 1 H‐NMR ), and field emission transmission electron microscopy ( FE‐TEM ). Thereby, these newly synthesized and scalable organo‐functionalized Si NCs are applicable as raw materials for practical use in devices by tuning the surface chemistry with various capping molecules.