Peer-Reviewed Journal Details
Mandatory Fields
Collins, G.; Fleming, P.; Barth, S.; O'Dwyer, C.; Boland, J. J.; Morris, M. A.; Holmes, J. D.;
2010
December
Chemistry of Materials
Alkane and alkanethiol passivation of halogenated Ge nanowires
Published
()
Optional Fields
22
6370
6377
The ambient stability and surface coverage of halogen (Cl, Br, and I) passivated germanium nanowires were investigated by X-ray photoelectron and X-ray photoelectron emission spectroscopy. After exposure to air for 24 h, the stability of the halogen-terminated Ge nanowire surfaces toward reoxidation was found to improve with the increasing size of the halogen atoms, i.e., I > Br > Cl. Halogen termination was effective in removing the native Ge oxide (GeOx) and could also be utilized for further functionalization. Functionalization of the halogenated Ge nanowires was investigated using alkyl Grignard reagents and alkanethiols. The stability of the alkyl and alkanethiol passivation layers from the different halogen-terminated surfaces was investigated by X-ray photoelectron spectroscopy and attenuated total reflectance infrared spectroscopy. Alkanethiol functionalized nanowires showed greater resistance against reoxidation of the Ge surface compared to alkyl functionalization when exposed to ambient conditions for 1 week.
http://pubs.acs.org/doi/10.1021/cm1023986
10.1021/cm1023986
Grant Details