####################################################
# Laurent Menard <lmenard@uiuc.edu>
# requesting 5 days, at minimum=4 days
# beamline 33BM, Structural behavior of Au catalysts on TiO2
# instrument 33BM-B XAFS
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# top:/home/www/beamtime-requests/req00934.txt
# UNICAT Member Beam Time Request  #934
# created Mon Mar 06 15:20:24 CST 2006
####################################################

apsrun:
	2006-02

beamline:
	33BM

collaboration:
	Yes

collaborator_Jenia:
	ON

contact:
	lmenard@uiuc.edu

days:
	5

description:
	XAFS measurements will be performed on a series of Au on TiO2 catalysts prepared from Au13 cluster precursors.  This synthetic approach allows control of supported nanoparticle size from 1 nm up to very large cluster with high size monodispersity.  We are interested in the size-dependent structure of these nanoparticles: the strain and disorder parameters inherent to the particle dimensions.  Recent experiments on Pt on Al2O3 revealed that the cluster/support interaction has a temperature-dependent component which has dramatic implications vis-a-vis thermal expansion and thermal disorder (Debye temperature).  We anticipate the Au on TiO2 is another system where these behaviors will manifest.

The experiment is similar to our previous work at the beam line.  We will be measuring XAFS of the nanoparticles at various temperatures and under different gas atmospheres (H2, He, and possibly O2, CO).

equipment_required:
	

experiment:
	Structural behavior of Au catalysts on TiO2

foreign_nationals:
	Joo Kang

hazards:
	Hazards include using a heating element, cryogenic liquids, and compressed gases, and flammable gases.

instrument:
	33BM-B XAFS

instrument_other:
	

minimumdays:
	4

name:
	Laurent Menard

nonmembers:
	

submit:
	Submit

unacceptable_dates:
	May 12-18, July 27-29

z34ID_details:
	


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