ISSN:
1572-8862
Schlagwort(e):
Aluminum nitride
;
gallium nitride
;
IR of surfaces
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Maschinenbau
,
Physik
Notizen:
Abstract By combining the results of IR spectroscopy experiments, both in the transmission and diffuse reflectance modes, with data obtained by HRTEM, XRD and XPS an overall picture of AlN and GaN nanoparticle surface structures and functionality were deduced. The surface species from the IR data analysis indicated that the nanostructured AlN powder surfaces had acidic and weak basic sites in the form of Al3+ and Al3N−, respectively. Also present were -OH, -NH2, and -NH. For GaN, the bulk core of the particle had a zincblendel (FCC) structure with nitrogen vacancies, and the only functionality detected was Ga–H. The surface of the particles had a wurtzite(HCP) structure, with abundant NH and NH2 groups as well as OH and Ga3+ functionalities.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1022660819473
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