STAMI Events

Friday, February 10, 2017 - 4:00pm
Ionic Liquid/Block Polymer Nanocomposites: Remarkably Versatile, Functional Materials
Prof. Timothy P. Lodge
University of Minnesota
Location: Engineered Biosystems Building (EBB) Seminar Room 1005
Abstract:

Ionic liquids are an emerging class of solvents with an appealing set of physical attributes. These include negligible vapor pressure, impressive chemical and thermal stability, tunable solvation properties, high ionic conductivity, and wide electrochemical windows. In particular, the non-volatility renders ionic liquids practical components of devices, but they require structure-directing agents to become functional materials. Block polymers provide a convenient platform for achieving desirable nanostructures by self-assembly, with lengthscales varying from a few nanometers up to several hundred nanometers. Furthermore, ionic liquids and polymer blocks can be selected to impart exquisitely tunable thermosensitivity, by exploiting either upper or lower critical solution transitions (UCSTs and LCSTs).

Event Contact: sharon.lawrence@chemistry.gatech.edu
Wednesday, December 7, 2016 - 3:00pm
Freezing on a Sphere
Professor Paul Chaikin
Julius Silver Professor of Physics at New York University
Location: Molecular Science and Engineering Building, Auditorium G011
Abstract:

Melting in two dimensions is characterized by the thermal excitation and proliferation of free topological defects, disclinations and dislocations which destroy the rigidity of the crystal. This freezing/melting process has been well established for flat systems, but on a sphere, topology requires that there must be a net 12 pentagons (1/2 disclinations) i.e., the 12 pentagons on a soccer ball, and energetically it is favorable to screen the pentagons with strings of dislocations (pentagon-heptagon pairs) known as “scars”. We find that freezing on sphere proceeds by the formation of a single, encompassing, crystalline “continent” that forces the defects into 12 isolated “seas” with icosahedral symmetry.

Event Contact: Sharon Lawrence (sharon.lawrence@ece.gatech.edu)
Monday, November 7, 2016 - 11:30am
Professor Eric Baer
Case Western Reserve University
Location: Variable, see Details
Abstract:

A series of lectures in modern nanostructural polymer science and it's applications. Please note the dates and times of the individual lectures: Lecture 1: November 7, 12:00 PMLayered and Fibrillar  Polymeric Systems by NanoExtrusion - Forced Assembly”; Lecture 2: November 8, 1:30 PMNew Polymeric NanoSystems - Lessons from Nature and Hierarchical Structures”; and Lecture 3: November 9, 3:00 PMApplications for New Nanolayered Composites and Membrane Filters”.

Event Contact: Sharon Lawrence (sharon.lawrence@ece.gatech.edu)
Wednesday, October 19, 2016 - 3:00pm
Spatially Resolved Electron Energy Loss Spectroscopy: Nanoscale Dynamic Response from Phonons to Core Excitations
Professor Philip E. Batson
The University of New Jersey, Piscataway NJ
Location: Marcus Building, Room 1117
Abstract:

Many recent studies have been enabled by the Scanning Transmission Electron Microscope, (STEM) that can produce an Angstrom-sized probe of keV electrons to access both bulk, surface and "aloof" excitations within structures ranging from atomic to molecular to nanoscale in size. I will discuss a little history, some surprising results from my involvment in the field, and speculate on the future potential for this technique.

Event Contact: Jennifer Curtis (jennifer.curtis@physics.gatech.edu) or Mike Filler (mfiller@gatech.edu)