UNSPECIFIED (1992) STRUCTURE DETERMINATION FOR PF3 ADSORPTION ON NI(111). JOURNAL OF PHYSICS-CONDENSED MATTER, 4 (31). pp. 6509-6522. ISSN 0953-8984

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Abstract

The local adsorption structure of PF3 on Ni(111) has been investigated using a combination of P K-edge near-edge and surface extended x-ray absorption fine structure (NEXAFS and SEXAFS) and normal incidence standing x-ray wavefield absorption (NISXW) at both the P and F atoms in order to determine the adsorption site, the adsorbate-substrate bond-length, the molecular orientation, and the internal structure of the adsorbed species. The molecule is found to be adsorbed atop a top layer Ni atom at a P-Ni nearest-neighbour distance of 2.07+/-0.03 angstrom, with its C3V symmetry axis perpendicular to the surface, and with an internal structure (both bond-lengths and bond angles) unchanged from that of the free molecule. The results also indicate that there is no change in the Ni(111) substrate structure induced by the adsorption, and the PF3 has a much larger vibrational amplitude parallel to the surface than perpendicular to the surface, presumably associated with a Ni-PF3 wagging mode.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	JOURNAL OF PHYSICS-CONDENSED MATTER
Publisher:	IOP PUBLISHING LTD
ISSN:	0953-8984
Date:	3 August 1992
Volume:	4
Number:	31
Number of Pages:	14
Page Range:	pp. 6509-6522
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/21873

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