omation mbers - Society for Laboratory Automation and Screening
omation mbers - Society for Laboratory Automation and Screening
omation mbers - Society for Laboratory Automation and Screening
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4:00 pm Wednesday, February 4 Microfluidics – Detection Room A4<br />
Cengiz S. Ozkan<br />
University of Cali<strong>for</strong>nia, Riverside<br />
Bourns Hall, A305<br />
Riverside, Cali<strong>for</strong>nia 92521<br />
cozkan@engr.ucr.edu<br />
Heterostructures of Nanomaterials <strong>and</strong> Organic-Inorganic Nanoassemblies<br />
Conventional nanofabrication strategies must be augmented by new techniques including self assembly methods<br />
in order to truly take advantage of the quantum nature of novel nanoscale devices <strong>and</strong> systems <strong>and</strong> permit<br />
the use of these properties <strong>for</strong> “real” applications in a larger system (> 10 nm <strong>and</strong> < 1 micron). In this talk, I will<br />
describe a novel technique <strong>for</strong> the fabrication of nano-assemblies of carbon nanotubes (CNT) <strong>and</strong> quantum dots<br />
(QD) – <strong>for</strong>mation of CNT-QD conjugates. CNT’s are primarily functionalized with carboxylic end groups by oxidation<br />
in concentrated sulfuric acid. Thiol stabilized QD’s in aqueous solution with amino end groups were conjugated<br />
to carbon nanotubes using the ethylene carbodiimide coupling reaction. Next, I will discuss the possibilities of<br />
using carbon nanotubes <strong>for</strong> encapsulation <strong>and</strong> mass transport <strong>and</strong> present our first observations in this area.<br />
Fourier trans<strong>for</strong>m infrared spectroscopy data <strong>for</strong> the chemical modification of carbon nanotubes <strong>and</strong> scanning<br />
<strong>and</strong> transmission electron microscopy images of the nanobuilding blocks <strong>and</strong> the nanotube filling process will be<br />
presented. Potential applications of our studies include the fabrication of novel electronic <strong>and</strong> biophotonic devices,<br />
crystal displays <strong>and</strong> biosensors.<br />
4:30 pm Wednesday, February 4 Microfluidics – Detection Room A4<br />
Wayne Weimer<br />
US Detection Technologies<br />
2611 Internet Boulevard, Suite 109<br />
Frisco, Texas 75034<br />
wweimer@usdetect.com<br />
Surface Enhanced Raman Spectroscopy <strong>for</strong> Real World Samples<br />
Precise control of thermal evaporation deposition parameters allows the reproducible production of silver <strong>and</strong> gold<br />
isl<strong>and</strong> films on glass substrates with tunable surface plasmon resonance wavelengths. Specific combinations of<br />
substrate temperature, deposition rate, <strong>and</strong> film thickness produce films exhibiting surface plasmon resonance<br />
wavelengths that can be adjusted from throughout the visible <strong>and</strong> into the near infrared regions of the electromagnetic<br />
spectrum. The effects of deposition parameters on surface plasmon resonance wavelengths are quantified using a<br />
so-called “design of experiment” analysis. The analysis produces reliable predictive models <strong>for</strong> producing gold films<br />
with predetermined surface plasmon resonance wavelengths. Nonresonant enhancement factors in excess of eleven<br />
orders of magnitude <strong>for</strong> surface enhanced Raman spectroscopy were recorded <strong>for</strong> rhodamine 6G dye on optimally<br />
tuned gold films. Spectra were obtained from submonolayer samples, corresponding to the detection of at most<br />
180 attograms of the dye. Techniques <strong>for</strong> the adaptation of these surface plasmon resonance tunable gold films <strong>for</strong><br />
detection of biological <strong>and</strong> explosive compounds will be discussed.<br />
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PODIUM ABSTRACTS
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