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<p class=MsoNormal>Dear Colleagues,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Julia Litvinov is defending her Master’s thesis on
July 15, 2010 at 10 am in Chemical Engineering Conference Room. If any of
your graduate students are interested in her research topic, please encourage
them to attend. Here are the details of her thesis:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal align=center style='margin-left:27.0pt;text-align:center;
text-indent:-27.0pt;text-autospace:none'><span lang=EN-GB style='font-size:
12.0pt;color:black'>F<span style='text-transform:uppercase'>abrication and
Corrosion protection of magnetic particles for biomedical applications<o:p></o:p></span></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Ion-beam aperture-array lithography was used to fabricate
micro-particles with engineered magnetic properties. In this top-down
fabrication method, a massive array of helium beamlets formed by a commercial
metal mesh stencil mask writes particle shapes into polymethylmethacrylate
resist. A 5<span style='font-family:Symbol'>m</span>m initial mesh size
was shrunk as necessary via conformal copper deposition. Thermal
evaporation of gold/permalloy/gold was use to form particles in the patterned
resist. Vibration sample magnetometry was used to characterize the
particles’ magnetic properties. A pinhole-free 25nm-thick alumina
coating was developed to protect the particles against corrosive environments,
such as phosphate buffered saline, to enable biomedical applications.
Fourier-transform infrared spectroscopy, Raman spectroscopy, X-ray
photoelectron spectroscopy, and X-ray diffraction were used to characterize the
alumina coating. Electrochemical deposition of copper through the alumina film
allowed monitoring for presence (or absence) of any pinholes.<span
style='font-size:12.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal style='line-height:200%;text-autospace:none'><span
style='font-size:12.0pt;line-height:200%'>Major Professor: </span><span
lang=EN-GB style='color:black'>Richard C. Willson, Professor, Chemical &
Bio-molecular Engineering<o:p></o:p></span></p>
<p class=MsoNormal style='line-height:200%;text-autospace:none'><span
lang=EN-GB style='color:black'>Suresh Khator<o:p></o:p></span></p>
<p class=MsoNormal style='line-height:200%;text-autospace:none'><span
style='font-size:10.0pt;line-height:200%;font-family:"Book Antiqua","serif";
color:blue'>_______________________________________________________</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";
color:blue'>Suresh K. Khator, Ph.D., P.E.
Phone:
713-743-4205 <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";
color:blue'>Associate Dean, College of Engineering Fax:
713-743-4214<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";
color:blue'>University of
Houston Email:
skhator@uh.edu <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";
color:blue'>E421 Engineering Bldg
2 www.egr.uh.edu/ie<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";
color:blue'>Houston, TX 77204-4008<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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