|Special Guest Lectures|
|Iron Oxide Molecular Clusters as Building Blocks of Non-volatile Memory|
|Vladimir Kolesnichenko, Xavier University|
|Johnston Hall 218
November 04, 2010 - 03:30 pm
Molecular clusters formed by high-spin mid-3d-transition metals exhibit different forms of magnetic behavior, including ferromagnetism with slow relaxation rates. This phenomenon gives rise to a relatively new area of studies called molecular magnetism or magnetic quantum dots. Such studies are aimed toward understanding the structure and magnetism relationship that would help with designing higher-performance magnets, e.g. with higher blocking temperature. New magnetic materials can be used for designing molecular computers, in microelectronics, and for making high-density information recording media. In spite of the increased efforts, there has been no rational method found so far for preparation of clusters with targeted structure and magnetic properties. This project aims feasible clusters that have a core structure similar to the unit cell of spinel-structured ferrites which are well-known ferrimagnets. The planned project involves aspects of interdisciplinary research in the fields of inorganic, structural and computational chemistry, molecular spectroscopy and magnetism. The target compounds are expected to act as a bridge between two developing areas of molecular magnets and bulk magnetic materials. This talk will be shown over the Access Grid in 218 Johnston Hall. Live viewing is 403 Staley Thomas Hall at Tulane University, New Orleans.
Graduated from the National Taras Shevchenko University (Kiev, Ukraine) in 1979 with MS degree in chemistry. Worked at the Institute of General and Inorganic Chemistry of the Ukrainian Academy of Sciences from 1979 to 1993 as a Research Associate initially, and as a Senior Scientist for the last five years. Defended PhD degree in inorganic chemistry in 1986. From 1993 to 1995 worked as a Research Associate at the University of Kansas; from 1996 to 1998 at the University of Iowa as a Postdoctoral Associate. In 1998-1999 worked as a Research Scientist at BlackLightPower Inc. (Cranbury, NJ). In 1999-2003 worked as a Research Specialist at the Advanced Materials Research Institute (New Orleans, LA). In 2004 became a full-time faculty at Xavier University. The objective of his current research project is to study all aspects of chemistry of magnetic metal oxide particles and clusters, namely the mechanism of nucleation and growth, surface and colloid chemistry, redox chemistry and the structure and magnetism relationship. These studies can help to develop novel materials for biomedical application (as MRI contrast agents and cell tracking labels), and will be useful for the development of molecular electronics, high-density information storage and catalysis.