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 | | Nanoimprint Technology and Applications
The ability to replicate patterns from micro- to nanoscale is of crucial importance to the advance of micro- and nanotechnologies and the study of nano-sciences. Nanoimprint is an emerging lithographic technology that promises high-throughput patterning of nanostructures.
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 | | Plasmonic Nano-Photonics
Plasmonic nanostructures, which are capable of nanoscale light manipulation and light concentration, have generated considerable interest with the development of nano-fabrication and characterization techniques. Guo lab has exploited a number of applications in recent years in the area of photonics and energy conversion devices.
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 | | Organic Solar Cells
Organic photovoltaics (OPVs) offer a promising alternative to inorganic solar cells due to their low cost, easy fabrication, and compatibility with flexible substrates over a large area. The key issues are to increase the solar cell efficiency and to push to large area applications. Toward this end, we applied nanoimprint lithography to produce ideally ordered nanoscale morphology between the donor and acceptor domains to systematically increase the efficiency of the OPV (Appl. Phys. Lett. 90, 123113, 2007).
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| | Polymer Photonic Microresonators for Biosensors and Ultrasound Detection
Microresonators are versatile optical elements that provide photon confinement for many important photonic applications. Sensors using evanescent wave to interrogate the presence of analytes on waveguide surface or in surrounding environment typically rely on the detection of effective refractive index change. A great demand exists for highly sensitive devices to detect biomolecules with very low concentrations.
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| | Bio-Nanotechnology and Nanofluidics
Guo lab and collaborators exploited the exciting nano-bio field over a few years ago. We have developed a flexible technique for selectively patterning bioactive proteins using nanoimprint, surface passivation and chemical modification, and exploiting the specificity of the biotin/streptavidin linkage. This technique achieves high throughput reproducible patterns of biologically active proteins with nanoscale resolution and high selectivity (Nano Letters. 4, 953, 2004).
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| | Si Nanoelectronics
Nanoelectronics, especially Silicon single-electron and quantum-effect devices, constitutes much of Dr. Guo’s Ph.D. and postdoctoral research work. He has analyzed the first Si single-hole quantum dot transistor (Appl. Phys. Lett. 67, 2338, 1995) and demonstrated the first room temperature single-electron memory in crystalline Si (Science, 275, 649, 1997).
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