Dr Karen Johnston

Senior Lecturer

Chemical and Process Engineering

Personal statement

My research focuses on (but is not limited to) soft-hard matter interfaces, including polymer composites and heterogeneous nucleation. I use multiscale simulations to provide insight into material properties and I enjoy collaborating closely with experimentalists. I am driven by curiosity and I am interested in a variety of systems, such as phase behaviour of soy milk coffee mixtures. For more information please visit my personal webpage:

http://personal.strath.ac.uk/karen.johnston/

Expertise

Has expertise in:

    • Density functional theory (DFT): electronic structure, adsorption and surface energies, vibrational frequencies etc.
    • Molecular dynamics (MD) simulations: structure and dynamics of thin films, liquids, solutions, solids etc. 

Prizes and awards

Strathclyde Team Award
Recipient
2019

More prizes and awards

Qualifications

Member of the Institute of Physics

Fellow of the Higher Education Academy

Publications

Glass transition temperature of a polymer thin film : statistical and fitting uncertainties
McKechnie David, Cree Jordan, Wadkin-Snaith Dominic, Johnston Karen
Polymer Vol 195 (2020)
https://doi.org/10.1016/j.polymer.2020.122433
Interfacial concentration effect facilitates heterogeneous nucleation from solution
McKechnie David, Anker Samira, Zahid Saraf, Mulheran Paul A, Sefcik Jan, Johnston Karen
Journal of Physical Chemistry Letters Vol 11, pp. 2263-2271 (2020)
https://doi.org/10.1021/acs.jpclett.0c00540
"Curdling" of soymilk in coffee : a study of the phase behaviour of soymilk coffee mixtures
Brown Mairi, Laitano Francesca, Williams Calum, Gibson Bruce, Haw Mark, Sefcik Jan, Johnston Karen
Food Hydrocolloids Vol 95, pp. 462-467 (2019)
https://doi.org/10.1016/j.foodhyd.2019.04.032
A density functional theory study of poly(vinylidene difluoride) crystalline phases
Pelizza Francesco, Johnston Karen
Polymer Vol 179 (2019)
https://doi.org/10.1016/j.polymer.2019.121585
Conundrum of γ glycine nucleation revisited : to stir or not to stir?
Vesga Maria J, McKechnie David, Mulheran Paul A, Johnston Karen, Sefcik Jan
CrystEngComm, pp. 2234-2243 (2019)
https://doi.org/10.1039/c8ce01829d
Investigation of IR and Raman spectra of species present in formaldehyde-water-methanol systems
Gaca-Zając Katarzyna Z, Smith Benjamin R, Nordon Alison, Fletcher Ashleigh J, Johnston Karen, Sefcik Jan
Vibrational Spectroscopy Vol 97, pp. 44-54 (2018)
https://doi.org/10.1016/j.vibspec.2018.05.001

More publications

Teaching

My teaching philosophy is to provide the best learning environment by challenging students through providing questions related to everyday exampes, that develop student's understanding and problem solving skills.

I am the course organiser and lecturer for CP102 Introduction to Chemical Engineering: Fundamentals, Techniques and Tools, and I supervise CP407 design projects, 18350 MEng projects, and Distance Learning MSc projects.

 

Research interests

Polymer composites are widely used in industry due to their strength, flexibility and light weight. Although generic properties of polymers at surfaces are well understood the interaction between a particular polymer and filler particle is not. The main challenge in simulating polymer-solid interfaces is the different length and time scales involved. This research bridges the gap between the micro- and mesoscale properties using a hierarchical multiscale approach. Density functional theory (DFT) calculations are used to obtain the detailed quantum interactions at the interface and this information is used to build surface potentials for atomistic and coarse-grained (CG) molecular dynamics simulations.

 

Professional activities

MSc thesis defense
Examiner
14/8/2020
STEP: Writing good multiple choice questions
Participant
4/8/2020
Faculty of Engineering Industry Engagement Webinar
Participant
4/8/2020
Hetsys Online Conference
Participant
9/7/2020
ScotCHEM Polymer and Soft Materials Conference
Speaker
1/7/2020
Chemical and Process Engineering mini-conference
Participant
18/6/2020

More professional activities

Projects

CCP5 funded summer project
Johnston, Karen (Principal Investigator)
18-Jan-2020 - 24-Jan-2020
Catching nucleation in action using surface enhanced Raman spectroscopy
Johnston, Karen (Principal Investigator) Faulds, Karen (Co-investigator) Sefcik, Jan (Co-investigator)
01-Jan-2020 - 31-Jan-2023
RI@S funded summer project
Johnston, Karen (Principal Investigator) Haw, Mark (Co-investigator) Sefcik, Jan (Co-investigator)
RI@S funded summer project for Mohammad Talha Dar
10-Jan-2019 - 05-Jan-2019
EPSRC funnded summer project
Johnston, Karen (Principal Investigator)
EPSRC summer bursary for Calum Laing
03-Jan-2019 - 12-Jan-2019
Solvay PhD studentship cofunding
Johnston, Karen (Principal Investigator)
01-Jan-2018 - 30-Jan-2020
Catching Nucleation in Action with Surface Enhanced Raman Spectroscopy
Johnston, Karen (Principal Investigator) Faulds, Karen (Co-investigator)
01-Jan-2018 - 01-Jan-2019

More projects

Address

Chemical and Process Engineering
James Weir Building

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