News & Events
Chemistry Weekly Seminar - Sheida Ahmadi
Posted on 2017-09-20 in Events
Nov 24, 2017
Title: Diffusion in highly confined channels: A transition state theory for hopping times
Brownian particles confined to narrow, quasi-one dimensional channels exhibit a dynamic transition from single file diffusion (SFD) to normal diffusion as the channel diameter reaches a passing threshold where the particles are able to hop past each other. In this crossover regime, molecular simulations have shown that the long time diffusion coefficient of the particles can be described in term of a hopping time, defined as the average time a particle performs SFD before escaping the cage formed by its neighbors. We use a two-particle small system isobaric-isothermal, n,p,T, ensemble to develop a Transition State Theory approach to calculating the hopping time for a confined hard disk fluid. The method is then used to explore how particle-particle and particle-wall interactions influence diffusion in narrow channels. Finally, we also begin to explore the possibility of using the SFD-normal diffusion crossover regime for the dynamic separation of mixtures.
Chemistry Weekly Seminar - Dr. Rob Britton
Posted on 2019-03-14
Dr. Robert Britton, Department of Chemistry, SImon Fraser University, will present a seminar at 4:00 pm in Thorvaldson 110.
Special Seminar - Dr. Darren Derksen
Posted on 2019-03-06
Dr. Darren Derksen will present a Special Seminar at 11:30 am in Geology 261
Special Seminar - Dr. Amy Stevens
Posted on 2019-02-08
Dr. Amy Stevens, Department of Chemistry, will present a seminar
Chemistry Weekly Seminar - PhD Candidate Amara Zuhaib
Posted on 2019-01-25
Amara Zuhaib, PhD Candidate, will present a seminar at 2:30 p.m. in Thorvaldson 271.
Special Seminar - Dr. Joe B. Gilroy
Posted on 2019-01-21
Dr. Joe B. Gilroy will present a Special Seminar at 10:30 in Thorvaldson 205A