#
# top.uni.aps.anl.gov:/home/www/beamtime-requests/req00194.txt
# UNICAT Member Beam Time Request  #194

# created Thu Aug 02 16:57:43 CDT 2001
#
beamline:
	34ID

collaboration:
	Yes

contact:
	ikr@uiuc.edu

days:
	60

description:
	Three experiments are envisaged in the Aug 1 to Sept 29 run.
	
	Fluctuations of hydrophobic interfaces.  Alkyl silane coated Si
	wafers have flat hydrophobic surfaces.  We plan to sudy the reflectivity
	signal from these, examining the intensity fluctuations at off-
	specular positions with a coherent pink beam.  Interfaces with
	water-glycerol mixtures will be examined as a function of temperature
	down to -30C near to the glass transition where diffusion stops.
	
	Crystallization of ferritin.  Ferritin solutions of 10mg/ml will be
	mixed with salt precipitants in 1mm x-ray capillaries.  Small crystals
	are formed within a few hours.  We will monitor these by diffraction
	of a small pink beam to look for the shape of the 111 Bragg peak.
	It is hoped to learn about the shape of the crystals in this way.
	We estimate there will still be enough coherence from the undulator 
	spectrum without the need for the monochromator.
	
	Crystallinity of thin polymer films on Si.  Dielectric films of
	PMMA will be prepared with different states of annealing.  These
	will be studied by small-angle scattering to determine their degree of 
	crystallinity.  If successful, proprietay use of 34ID will be arranged.

equipment+required:
	

experiment:
	Commissioning of 34-ID-C

foreign+nationals:
	Per Sandstrom

hazards:
	Chemicals are not hazardous:
	
	Silane coated samples prepared and disposed in Urbana.
	Glycerol
	Ferritin (blood protein)
	Precipitants, such as ammonium sulfate, sodium chloride, poly
	ethylene glycol
	PMMA-like polymers will be spun-coated in Linkoping and
	removed there after measurement.

minimumdays:
	

name:
	Ian Robinson

new+request:
	on

nonmembers:
	Per Sandstrom, Thin Film Electronics AB

unacceptable+dates:
	Study days.


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