Weihong Qiu will be presenting a seminar titled, Shining Light on the Molecular Mechanism of Microtubule Motors on April 1, 2014 at 4pm in LPSC 402.
Professor Ognjen Miljanic of University of Houston will present a seminar entitled, “Self-Sorting and Compartmentalization in Dynamic Combinatorial Libraries” on Thursday, March 13th at 5pm in LPSC 402.
Professor Scott Phillips from Pennsylvania State University will be presenting a seminar entitled, “New Organic Strategies in Reagent Design for Point-of-Care Diagnostics,” on Thursday, March 6th at 5pm in LPSC 402.
Professor Weston Borden from University of North Texas will be presenting a seminar titled “Tunneling by Carbon in Organic Reactions. Calculations Tell Experimentalists Where to Look and What to Look For,” on Thursday, February 6th at 5pm in LPSC 402.
Prof. Keith Nelson will be here Tuesday, January 28, 2014 in LPSC 402 at 4pm, presenting a seminar entitled: High-Field Terahertz Pulse Generation and Nonlinear THz Spectroscopy of Molecules and Materials.
Abstract: In recent years it has become possible to generate single-cycle or few-cycle pulses of light at terahertz (THz) frequencies with electric field strengths in the MV/cm range. This has opened up broad new possibilities for nonlinear spectroscopy and coherent control of previously inaccessible collective processes and low-frequency resonances. Generation of intense pulses in the 1-THz frequency range is itself achieved through collective coherent control over the lattice of a nonlinear optical crystal. If the crystal is a thin slab, it can act as a THz waveguide into which elements such as THz bandgap structures, dipole antennas, and others can be incorporated for a variety of applications. THz pulses generated in a bulk crystal can be projected into free space and used for nonlinear spectroscopy. The THz fields can be exploited through their acceleration of electrons or ions or through the forces they exert on ionic or molecular dipoles. THz-driven electronic responses have resulted in impact and tunneling ionization of semiconductors and in collective electronic/structural phase transitions in correlated electron materials. These dynamical responses have been monitored with THz, optical, and hard x-ray probe pulses. THz-driven lattice responses include “soft” optic phonon vibrations as well as induced orientation of nanometer-size polar regions in crystals near ferroelectric phase transitions. Finally, THz coherent control over multiple rotational states of polar molecules in the gas phase has been demonstrated, including the observation of an unusual form of THz superradiance resulting from the transient collective orientation of the molecular dipoles. THz field generation, manipulation, and applications, and the wide-ranging prospects for nonlinear THz spectroscopy, will be discussed.
Professor Gleb Yushin from Georgia Institute of Technology will present a seminar entitled, “Nanocomposite Materials for Energy Storage Devices” on Friday, January 17th at 4:00pm in Gilbert 324.
Dr. Deidre Johns will be visiting OSU January 21/22, 2014 to interview for the Assistant Professor – Pharmacology/Pharmacogenomics position with the College of Veterinary Medicine, Department of Biomedical Sciences. Please contact Jayne Theurer if you would like to schedule a personal visit with her.
Dr. Johns will present her seminar January 21, 2014 @12:00 in Magruder 102.
Voltage Sensing Inorganic Nanoparticles
Monday, November 25, 2013
LPSC 402 4:00pm
We will report on efforts to develop voltage sensing inorganic nanoparticles that self‐insert into the cell membrane and optically record, non‐invasively, action potential on the single particle level. Bandgap‐engineered colloidal semiconductor nanoparticles, dubbed voltage‐sensing nanoparticles (vsNPs) that display large quantum‐confined Stark effect (QCSE) at room temperature and on the single particle level were developed. QCSE measurements of several types of fluorescent colloidal semiconductor quantum
dots (QDs) and nanorods (NRs) were performed. It was shown that charge separation across one (or more) heterostructure interface(s) with type‐II band alignment (and the associated induced dipole) is crucial for an enhanced QCSE. Surface functionalization that impart membrane‐protein like properties was developed. We will discuss the possible utility of these nanoparticles for voltage sensing on the nanoscale, and in particular, their suitability for action potential recording.
Eric Drexler, founding father of nanotechnology and author of Radical Abundance: How a Revolution in Nanotechnology Will Change Civilization, will speak on Friday Nov. 22, 3-5 p.m., in Construction and Engineering Hall (LaSells Stewart Center).
Sastry Pantula, Dean of the College of Science, will speak on “ABCs @ NSF” on Oct. 21, 4 p.m., in Owen Hall 102. He will discuss funding and career opportunities at NSF.