【9.18】Academic lecture: Metal Ion and Charged Nanoparticle Transfer across Liquid Interfaces
Speaker: Mark L. Schlossman
Moderator: Prof. LUO Guangming
Time: 10:00AM, Sept.18, 2013
Place: Room B326, IHEP Main Building
Abstract:
Electrostatic interactions control processes at liquid interfaces that underlie many scientific and industrial processes. The speaker will discuss two types of ion transport in which ions are transferred from an aqueous phase to an organic phase. An electrostatic energy penalty accompanies transport into the lower permittivity organic phase and requires shielding of the ion charge. X-ray scattering and other techniques are used to demonstrate the unusual mechanisms for shielding heavily charged nanoparticles and multi-valent ions. In the case of +100 charged nanoparticles, enhanced ion correlations that exist in the organic phase lead to charge reversal simultaneously with the transport. In the case of multi-valent heavy metal ions, X-ray studies reveal the formation of interfacial ion-extractant complexes that are subsequently solvated in the organic phase.
About the speaker:
2004 - present University of Illinois at Chicago, Professor of Physics
2003 - present University of Illinois at Chicago, Courtesy Appointment, Chemical Engineering Department
2000 - 2004 University of Illinois at Chicago, Associate Professor of Physics
1999 - 2008 PRT Spokesperson Beamline X19C, National Synchrotron Light Source (Brookhaven National
Laboratory)
1996 - 2008 Spokesperson for Surface Scattering (Beamline X19C, National Synchrotron Light Source,
Brookhaven National Laboratory)
1995 - present University of Illinois at Chicago, Courtesy Appointment, Chemistry Department
1994 - 2000 University of Illinois at Chicago, Assistant Professor of Physics
1990 - 1994 University of Chicago, Research Scientist in the James Franck Institute