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# Zhan Zhang <zhanzhang@anl.gov>
# requesting 6 days, at minimum=5 days
# beamline 33ID, Ion adsorption profiles at the quartz-aqueous solution interface under various conditions
# instrument 33ID-D kappa
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# leo:~web33/beamtime-requests/req01281.txt
# Internal Beam Time Request  #1281
# created Thu May 07 14:20:04 -0500 2009
####################################################

apsrun:
	2009-02

beamline:
	33ID

collaboration:
	Yes

contact:
	zhanzhang@anl.gov

days:
	6

description:
	This is associated with GUP 11299, which was not allocated time through GUP because a wrong proposal was used to ask for beamtime.  

Quartz (alpha-SiO2) single crystal is cut from the commercially available Herkimer “diamond” with the (100) or (101) surface exposed.  The crystal is mounted in a flow cell.  Deionized water (DIW) or solution can be flowed through the cell to expose the surface.    
A CCD detector will be used to measure the reflected beam intensity.  The CTR measurement will be carried out at energy far away from the adsorption edge of the specific ion (e.g. Rb+).  The resonance anomalous X-ray reflectivity (RAXR) will be carried out to probe the element specific distributions, especially the partitioning of the adsorbed ion between the inner-sphere and the outer-sphere electrical double layer. 
At least 4 Different solution conditions, such as the concentration and pH, are planned.  When a change in structure is confirmed, a full 3D measurement will be carried out for that specific condition.

equipment_required:
	Roper CCD, Vortex detector and control computers

experiment:
	Ion adsorption profiles at the quartz-aqueous solution interface under various conditions

foreign_nationals:
	none

hazards:
	none

instrument:
	33ID-D kappa

instrument_other:
	

minimumdays:
	5

name:
	Zhan Zhang

nonmembers:
	Fenter, Paul  (ANL)
Welsoloski, David (ORNL) -- not on site

submit:
	Submit

unacceptable_dates:
	

z34ID_details:
	


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