Conferences, Lectures, & Seminars
Events for November
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Lyman Handy Colloquium Series
Thu, Nov 08, 2007 @ 12:45 PM - 01:50 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Speaker: Paul Cremer, Texas A&Mhttp://www.chem.tamu.edu/faculty/faculty_detail.php?ID=148Proteomics on a Supported Membrane ChipSupported phospholipid bilayers (SPBs) offer a promising environment to
mimic many properties of native cell membranes. As such, these systems hold great promise for creating highly selective biosensors as well as for the design of nanoscale architectures in which membrane proteins may be separated without denaturation. Two important hurdles exist, however, before these systems can be widely exploited in applications. First, SPBs are generally unstable upon exposure to air. Second, there is typically insufficient space between the lower leaflet of the supported bilayer and an underlying planar support to allow full mobility for membrane proteins. In this presentation I will describe recent advances in our laboratory for creating air stable SPBs as well as a novel "double cushion" platform that allows transmembrane proteins to retain lateral mobility.Location: Olin Hall of Engineering (OHE) - 122
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir
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Integrated Nanowire Electronics and Sensors on Flexible Plastic Substrates
Thu, Nov 15, 2007 @ 12:45 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Graduate SeminarbyDr. Michael McAlpine
Post-Doctoral Researcher
Division of Chemistry and Chemical Engineering
California Institute of TechnologyAbstractThe introduction of an ambient-temperature route for integrating high performance materials on
flexible plastic substrates could enable exciting avenues in fundamental research, and innovative
electronic and medical devices. However, the temperature constraints imposed by these substrates
restrict the use of high carrier mobility materials, such as polycrystalline silicon, generally limiting these devices to the modest computational capabilities of amorphous silicon and organic semiconductor thin film transistors. The development of new materials and novel materials processes for overcoming this restriction could impact a broad spectrum of applications.Semiconductor nanowires represent unique, high performance building blocks for electronic,
photonic, and sensing devices. In this talk, I will present my work demonstrating that single-crystal
nanowires can be hierarchically assembled onto flexible plastic substrates under ambient conditions to create multi-component, fully integrated devices, including field-effect transistors, light-emitting diodes, ring oscillators, and electronic noses. These devices all exhibit performance metrics which meet or exceed the state-of-the-art for flexible electronics.The key to our approach is the separation of the high-temperature synthesis of single-crystal
nanowires from room temperature assembly, thus enabling fabrication of high-performance devices on
virtually any substrate. Silicon nanowire field-effect transistors on plastic substrates display mobilities rivaling those of single-crystal silicon and exceeding those of amorphous silicon and organic transistors currently used for plastic electronics. Furthermore, we show that these systems can be integrated into ring oscillators on plastic which generate frequencies approaching the microwave, the highest observed frequencies for circuits based on nanoscale materials.Finally, we exploit SiO2 surface chemistries to construct a "nano-electronic nose" library,
which can distinguish acetone and hexane vapours via distributed responses. We also demonstrate that
amide coupling of theoretically tailored peptide sequences to the arrays allows for selective
discrimination of chemicals often found in the breath of sick patients. This excellent sensing
performance coupled with biocompatible plastic could open up far-reaching opportunities in mobile
computing, lightweight display, or even implantable monitoring applications.Thursday, November 15, 2007
12:45 p.m.
OHE 122Refreshments will be served after the seminar in HED Lobby
The Scientific Community is Cordially Invited.Location: Olin Hall of Engineering (OHE) - 122
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir
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Biophotonics: Lighting the way
Tue, Nov 27, 2007 @ 03:00 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Dr. Andrea ArmaniCalifornia Institute of TechnologyAbstractFor many biological and chemical experiments, a sensor must have high sensitivity, high specificity, and fast response time. There are many technologies which are able to achieve one or two of these three requirements, but many still face fundamental sensitivity or response limitations.Silica optical resonators are able to overcome these limitations because of the high quality factor (Q). In their application as a single molecule sensor, the sensitivity is derived from the long photon lifetime inside the microcavity, and the specificity is derived from functionalization of the silica surface. During the initial series of label-free detection experiments, pure Interleukin-2 (IL-2) solutions were injected into the volume surrounding the microtoroid. The microtoroid successfully detected step-like shifts in resonance wavelength from individual IL-2 molecules binding. Additional experiments have shown that even in the more complex environment of serum individual binding events of IL-2 are still resolved. Therefore, this single molecule sensor will enable research in new areas of biophysics and cell biology.
Location: Henry Salvatori Computer Science Center (SAL) - 101
Audiences: Everyone Is Invited
Contact: Petra Pearce Sapir
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Some Physics, Materials Science and Chemistry of Single Molecules Sensing with Solid State Nanopores
Thu, Nov 29, 2007
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
EVENT CANCELLEDDistinguished Lecture SeriesProfessor Jene A. Golovchenko Department of Physics and School of Engineering and Applied ScienceHarvard University
Cambridge MAAbstractThis talk will cover recent developments and discoveries connected with the Solid State Nanopore Program at Harvard. It will address accomplishments and challenges related to nanopore fabrication, nanopore interaction with DNA molecules, DNA - carbon nanotube interactions, nanotubes in nanopores, and the most recent development, multiple interrogations of single molecules in solution with a solid state nanopore trap.Thursday, November 29, 2007Seminar - 12:45 p.m.OHE 122Refreshments served after the seminar in HED Lobby
The Scientific Community is Cordially Invited.
Audiences: EVENT CANCELLED
Contact: Petra Pearce Sapir