GTPN Events

Wednesday, April 12, 2017 - 4:00pm
Dense packing of spheres in cylinders
Dr. Adil Mughal
Aberystwyth University
Location: Molecular Science and Engineering Building, Room 1224
Abstract:

We study the optimal packing of hard spheres in an infinitely long cylinder [1-4]. Our simulations have yielded dozens of periodic, mechanically stable, structures as the ratio of the cylinder (D) to sphere (d) diameter is varied. Up to D/d=2.715 the densest structures are composed entirely of spheres which are in contact with the cylinder. The density reaches a maximum at discrete values of D/d when a maximum number of contacts are established. These maximal contact packings are of the classic "phyllotactic" type, familiar in biology. However, between these points we observe another type of packing, termed line-slip.

Event Contact: Professor Mohan Srinivasarao (404) 894-9348
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
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)