Conferences, Lectures, & Seminars
Events for March
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Molecules and Materials for 21st Century Needs
Tue, Mar 02, 2010 @ 01:15 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Molecules and Materials for 21st Century NeedsDr. Tina SalgueroHRL Laboratories, LLCMalibu, CA Abstract With our perspective at the beginning of a new decade, it seems clear that the 21st century will be an age when custom-tailored molecules and materials will reach an unprecedented level of importance. In this talk, I will describe several examples of custom-tailored molecules and materials that range across the fields of organometallic chemistry and materials science and have applications in catalysis, chemical synthesis, and energy production.
Location: Hedco Pertroleum and Chemical Engineering Building (HED) - 116
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir
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Printed Assembly of Micro/Nanomaterials with Silicon and Gallium Arsenide Based Compound Semiconduct
Thu, Mar 04, 2010 @ 12:45 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Printed Assembly of Micro/Nanomaterials with Silicon and Gallium Arsenide Based Compound Semiconductors for High Performance Photovoltaics and OptoelectronicsDr. Jongseung Yoon
Beckman Institute for Advanced Science and Technology
UIUCAbstract
In the first part of my talk, I will present our recent work that explores techniques to exploit silicon for unusual photovoltaic module designs. Silicon, in amorphous or various crystalline forms, is used in >90% of all installed photovoltaic (PV) capacity. The high natural abundance of silicon, with the excellent reliability and good efficiency of solar cells made with it, suggest its continued use, on massive scales, for the foreseeable future. As a result, although there is significant promise for organics, nanocrystals, nanowires and other new materials for photovoltaics, many opportunities continue to exist for research into unconventional means for using silicon in advanced PV systems. We developed new approaches to exploit printed arrays of ultrathin, monocrystalline Si solar microcells for unconventional photovoltaic modules. The resulting devices can offer many useful features, including high degrees of mechanical flexibility, user-definable levels of transparency, ultra-thin form factor micro-optic concentrator designs, together with the potential for high efficiency and low cost.In the second part of my presentation, I will discuss about releasable epitaxial multilayer assemblies of gallium arsenide (GaAs) based compound semiconductors for high performance photovoltaics and optoelectronics. Compound semiconductors such as GaAs provide unmatched performance in photovoltaic and optoelectronic devices. Current methods for growing and fabricating these materials are incompatible with the most important modes of use, particularly in photovoltaics, where large quantities of material must be distributed over large areas on low cost, amorphous foreign substrates. We developed new methods that address many of these challenges, through cost effective production of bulk quantities of high quality functional films of GaAs from thick, epitaxial assemblies formed in a single deposition sequence on a growth wafer. Specialized designs enabled separation, release and assembly of individual active layers in these stacks to create devices on substrates ranging from glass, to silicon and plastic, in quantities and over areas that exceed possibilities with conventional approaches.
Location: Hedco Pertroleum and Chemical Engineering Building (HED) - 116
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir
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What Have We Learned Lately about Prospects for Carbon Dioxide Sequestration in Deep Geological Form
Thu, Mar 11, 2010 @ 12:45 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Lyman Handy Colloquium SeriesPresentsSally BensonStanford UniversityAbstract:In little more than a decade, carbon dioxide (CO2) capture from point source emissions and sequestration in deep geological formations has emerged as one of the most important options for reducing CO2 emissions. Two major challenges stand in the way of realizing this potential: the high cost of capturing CO2 and gaining confidence in the capacity, safety, and permanence of sequestration in deep geological formations. Building on examples from laboratory and field based studies of multiphase flow of CO2 in porous rocks; this talk addresses the current prospects for carbon dioxide sequestration. Which formations can provide safe and secure sequestration? At what scale will this be practical and is this scale sufficient to significantly reduce emissions? What monitoring methods can be used to provide assurance that CO2 remains trapped underground? What can be done if a leak develops? What are the potential impacts to groundwater resources and how can these be avoided? The status of each these questions will be discussed, along with emerging research questions.
Location: James H. Zumberge Hall Of Science (ZHS) - 159
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir
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Nanostructured Fly Paper for Enrichment of Circulating Tumor Cells
Fri, Mar 19, 2010 @ 02:00 PM - 03:00 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Over the past decade, circulating tumor cells (CTCs) has become an emerging "biomarker" for detecting early-stage cancer metastasis, predicting patient prognosis, as well as monitoring disease progression and therapeutic outcomes. However, isolation of CTCs has been technically challenging due to the extremely low abundance (a few to hundreds per ml) of CTCs among a high number of hematologic cells (109 per mL) in the blood. Our joint research team at UCLA has developed a new cell capture technology for quantification of CTCs in whole blood samples. Similar to most of the existing approaches, epithelial cell adhesion molecule antibody (anti-EpCAM) was grafted onto the surfaces to distinguish CTCs from the surrounding hematologic cells. The uniqueness of our technology is the use of nanostructured surfaces, which facilitates local topographical interactions between CTCs and substrates at the very first cell/substrate contacting time point. We demonstrated the ability of these nanostructured substrates to capture CTCs in whole blood samples with significantly improved efficiency and selectivity. The successful demonstration of this cell capture technology using brain, breast and prostate cancer cell lines encouraged us to test this approach in clinical setting. We have been able to bond our first validation study with a commercialized technology based on the use of immunomagnetic beads (i.e., CellSearchTM Assay). A group of clinically well-characterized prostate cancer patients at UCLA hospital have been recruited and tested in parallel by these two technologies.
Audiences: Everyone Is Invited
Contact: Beeta Benjy
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Challenge to Seeing Atomic Structures of Nano-materials with Electron Microscopy
Mon, Mar 22, 2010 @ 11:00 AM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Challenge to Seeing Atomic Structures of Nano-materials with Electron MicroscopyProfessor Sumio Iijima
Meijo University
Nagoya, Japan Abstract
Nanoscience deals with nano-scale structures of materials and therefore controlling the structures is crucial. A typical example of nanostructures is carbon nanotubes and their many unique properties have been investigated theoretically and experimentally, and brought a new concept of materials into condensed matter physics. More importantly, nanoscience is closely related to nanotechnology and thus to industrial applications as we see in many fields of carbon nanotube research. An important issue for nanoscience is characterization of materials. In the case of carbon nanotubes their exact atomic structures are determined by means of electron microscopy, Raman and photoluminescence spectroscopy, etc., where sometimes commercially available instruments are not sufficient and need substantial modification for each particular purpose, where âdo it yourselfâ becomes important. We demonstrate some latest results on structural characterization of carbon nanotubes, graphene, and boron nitride thin films, including âmonatomic carbon strings that have been successfully observed in our laboratory. BiographySumio Iijima is a Professor at Meijo University, a Director of the Nano-tube Research Center at AIST and a Senior Research Fellow at NEC, in Japan. After graduating from Tohoku University, he joined Arizona State University where he developed high-resolution transmission electron microscopy (HRTEM) (1970-1982). In 1982 he returned to Japan and joined the NEC Research Laboratories in 1987. In 1991 he discovered carbon nanotubes that have initiated nano-material science and nanotechnology. Professor Iijima has received numerous honors and awards from Italy, Japan, Spain and Switzerland. He is a foreign associate of the National Academy of Science (USA).Time and Location
Monday, March 22, 2010Seminar at 11:00 a.m.
Ethel Percy Andrus Gerontology Center (GER) Auditorium
A reception will follow in the HEDCO Foundation Building (HED) lobby.Location: Ethel Percy Andrus Gerontology Center (GER) Auditorium
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir
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Engineering Protein Fitness Using Cellular Quality Control Mechanisms
Thu, Mar 25, 2010
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Distinguished Lecture SeriesPresentsMatthew DeLisaUniversity of CornellAbstract:TBA
Location: John Stauffer Science Lecture Hall (SLH) - 100
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir
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Optical Interference for Nanoscale Biological Imaging and Detection
Mon, Mar 29, 2010 @ 01:00 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Photonics Seminar SeriesPresents
âOptical Interference for Nanoscale Biological Imaging and DetectionâÂ
Professor M. Selim ÃnlüDepartment of Electrical and Computer EngineeringBoston University
We have utilized basic principles of optical interference and resonance in biological applicationsdemonstrating nanometer scale measurement capability in fluorescence microscopy and label-freesensing of protein binding and viruses in a high-throughput micro-array format.
We have developed a technique â" spectral self-interference fluorescent microscopy (SSFM) â" thattransforms the variation in emission intensity for different path lengths used in fluorescenceinterferometry to a variation in the intensity for different wavelengths in emission, encoding the high-resolution information in the emission spectrum. Using SSFM, we have estimated the shape of coiledsingle-stranded DNA, the average tilt of double-stranded DNA of different lengths, and the amount ofhybridization. The determination of DNA conformations on surfaces and hybridization behavior provideinformation required to move DNA interfacial applications forward and thus impact emerging clinical andbiotechnological fields. Recently, we have also applied SSFM to study the conformational changes ofpolymers and DNA-protein complexes. [1]
Direct monitoring of primary molecular binding interactions without the need for secondary reactantswould markedly simplify and expand applications of high-throughput label-free detection methods. We developed a simple interferometric technique â" Spectral Reflectance Imaging Biosensor (SRIB) â" that monitors the optical phase difference resulting from accumulated biomolecular mass. Dynamic measurements were made at ~10pg/mm2 sensitivity. We have also demonstrated simultaneous detection of antigens and antibodies in solution using corresponding probes on the SRIBsurface as well as label-free measurements of DNA hybridization kinetics. [2] [1] P. S. Spuhler, J. Knezevic, A. Yalcin, Q. Bao, E. Pringsheim, P. Dröge, U. Rant, and M. S. Ãnlü, "Platform for in situ real-time measurement of protein-induced conformational changes of DNA ," Proceedings of the National Academy of Science, January 2010.
[2] I. E. Ozkumur J.W. Needham, D. A. Bergstein, R. Gonzalez, M. Cabodi, J. M. Gershoni, B. B.Goldberg, and M. S. Ãnlü, â âLabel-free and dynamic detection of biomolecular interactions for high-throughput microarray applications,â PNAS, Vol. 105, pp. 7988â"7992(2008)Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir