<HTML> <HEAD> <TITLE>SEMINAR NOTICES: Klimeck, 02.07, 2:00; Zemlyanov, 02.08, 10:30 AM</TITLE> </HEAD> <BODY background="cid:3253606617_830262"> “Atomistic Alloy Disorder in Nanostructures” Wednesday, February 7, 2007 2:00 PM EE 317 Gerhard Klimeck, Technical Director, NCN Professor, Electrical and Computer Engineering Purdue University SEE ATTACHED FLYER FOR DETAILS. <HR ALIGN=CENTER SIZE="3" WIDTH="95%">“Introduction to X-ray Photoelectron Spectroscopy and XPS Application for Biologically Related Objects” Thursday, February 8, 2007 10:30 AM Birck Nanotechnology Building, Room 1001 Dimitry Zemlyanov, Surface Science Application Scientist Birck Nanotechnology Center, Purdue University X-ray Photoelectron Spectroscopy (XPS), which is known as Electron   Spectroscopy for Chemical Analysis (ESCA), is a powerful research   tool for the study of the surface of solids. The technique becomes   widely used for studies of the properties of atoms, molecules,   solids, and surfaces. The main success of the XPS technique is   associated with studies of the physical and chemical phenomena on the   surface of solids. These investigations were limited by relatively   simple inorganic reactions and not many biologically related objects   were approached by XPS. There are impartial reasons for low   involvement of XPS into investigations of biologically related   objects. First, organic chemistry samples often exhibit high vapor   pressure and therefore, degas badly in vacuum. This is not compatible   with XPS technique. Second, X-rays might cause radioactive damage of   a sample. Third, the C 1s region, which is most informative for   organic chemistry samples, is narrow and the photoemission peaks can   over crowd the region. In this presentation, successful examples of XPS studies of bio- related specimen will be presented. In particularly, the systematic   XPS investigation of four peptide-silane and peptide-silane hybrid   sol-gel thin films prepared under biologically benign conditions will   be reported. This work demonstrates a use for XPS to characterized   biologically inspired surfaces, providing critical information on   peptide coverage on the surface of the materials. The self-assembling   layer characterization will be considered on the examples of thiols   on Au and aryl diazonium molecules on Si (111). Dmitry Zemlyanov received his Ph.D. in Physics and Mathematics from   the Novosibirsk State University, Russia. He is currently a Surface   Science Application Scientist at the Birck Nanotechnology Center and   is in charge of the Surface Analysis Facility at Birck. Earlier, he   was a postdoctoral researcher at the Fritz-Haber-Institute, Berlin,   at Worchester Polytechnic Institute, MA; an adjunct assistant   professor at the Physics Department, Worchester Polytechnic   Institute, MA, and a research fellow at Material and Surface Science   Institute, University of Limerick, Ireland. His research interests   include surface science, heterogeneous catalysis, surface phenomena. SPONSORED BY: Birck Nanotechnology Center, Bindley Bioscience Center, Discovery   Park, The NASA Institute for Nanoelectronics and Computing, The   Network for Computational Nanotechnology, VEECO, NCN Student   Leadership Council, Department of Chemistry, Department of Physics,   School of Chemical Engineering, School of Electrical and Computer   Engineering, School of Mechanical Engineering </BODY> </HTML>