Use and development of molecular modelling techniques for the study of minerals, materials and interactions at their interfaces

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Research

Amino acids and Peptides Intercalated by LDH
From amino acids (top) to peptides (bottom) within a mineral interlayer

Our research focus is on the use and development of molecular models and techniques for the study of dynamic processes involving minerals, materials and interactions at their interfaces.

The group and our collaborators have a very unique multidisciplinary  background, bringing together knowledge from theoretical and experimental chemistry, material and environmental sciences, geosciences and astrobiology.  We aspire for our work to foster a step-change in computational modelling, ensuring that the work we do are of direct benefit to our society.

The applications of our research are vast, from abiogenetic origins of life, enhanced oil recovery, crystal growth inhibition, modifications of materials for desired functionality, soil and water pollution remediation,  separation of polymeric matrices, and always a pinch of software development.


OUR AREAS of research

Origins of Life

Upon dehydration, the N- and C-termini of adsorbed amino acids co-align, allowing the formation of a peptidic bond. The newly formed di-peptide remains tethered via C-terminus only. The bond formation leads to the loss of the charge, facilitating introduction of a new amino acid. The N-terminal of amino acid is then able to form a bond with the C-terminal of di-peptide, thus triggering further peptide growth.
Proposed mechanism for LDH-supported peptide bond formation

The origins of life have been the subject of much research, but fundamental questions still remain unanswered. We are interested on the surface-supported the abiogenetic formation of proto-biomolecules in early Earth and extraterrestrial conditions, as well as the preservation of potential bosignatures.

Pollution Remediation

MMT TC Ca2+/Mg2+
Two co-joined systems featuring tetracycline and clay layers in of Ca2+ (left) vs Mg2+ (right) brine

The rise of densely populated environments brings new challenges to our society, one of many is the management and disposal of increasingly diverse pollutants. With our work we aim to identify the key properties making naturally occurring materials capable of adsorbing small organic pollutants.

BIOCHARS

BC
Model of a biochar, highlighting the cyclic structures, coloured by the number of carbons

Biochar is a remarkable material! Made from pyrolysis of biomass, byproduct of human waste, they have been used for soil amendment, carbon deposition and, more recently for sequestration of pollutants. With a poorly defined structure and featuring large variety of chemical structures and functional groups, creating a representative molecular model of biochar is not a simple task. We are working on developing these models to become available for the biochar research community.

Enhanced Oil Recovery

jp-2016-00187q_0024

Organic molecules in the hydrated pore of kaolinite clay mineral

EOR has become commonplace in order to maximise oil field production. Our work elucidates the mechanisms behind this process with series of clay – oil simulations.

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Group

CURRENT Members

Dr Valentina Erastova

Chancellor’s Fellow

Further information and contact details here

Rosie

Rosie Wood – E4 DTP PhD Student (since 2020)

I am a PhD student working on the molecular modelling of biochars. The goal of my research is to better understand the interfacial interactions of biochars and ultimately offer insights into how to improve their performance as adsorbents in water treatment. I did my undergraduate degree in chemistry at the University of Bristol and, as part of the E4 DTP, I will be taking courses across many different areas of environmental science.

Hannah Pollak – PhD Student (since 2021)

In my PhD project I am studying interactions between clays and organic pollutants such as pharmaceuticals. I am using molecular modelling techniques in order to gain atomic-level understanding about retention and release of contaminants by minerals in soils. These insights should enable the design of effective materials to be used in drug pollution remediation.

During my bachelor’s studies in chemistry, and my master’s studies in theoretical chemistry and computational modelling I focused on the experimental and theoretical study of biological systems. I believe that my expertise in these fields provides me with a good foundation for my current research.

Audrey Ngambia – PhD student (since 2021)

Audrey was awarder prestigious Edinburgh Doctoral College Scholarship to do her PhD on modelling of biochars.

Carmen Baiano – visiting PhD student (2021)

Carmen is on her last year of PhD of Astrochemistry at the Scuola Normale Superiore di Pisa, studying catalytic role of interstellar ices in the formation of prebiotic molecules. She is visiting our group through the HPC Europa3 program, to establish a protocol to transfer sampling form the classical molecular dynamics into quantum chemical calculations

Jakub Licko – MChem student (2021-2022)

Cameron Clinger – BSc research student (2021-2022)

Visiting the Group

Our group is a host for HPC-EuropaPan-European Research Infrastructure on High-Performance Computing. If you are interested in a collaboration, please get in touch with Valentina about EPCC visit through the Transnational Access Program.

Joining the Group

If you are interested in joining the group as a PostDoc, PhD, Masters or an Intern for more details and funding opportunities see here.

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News

PHD Position: ULTRACOOL CHEMISTRY IN NOCTILUCENT CLOUDS

co-supervised by Charles Cockell and Basile Curchod The highest clouds on Earth, noctilucent clouds, are named for their night glow. They form at extreme mesospheric conditions, and are sensitive to smallest environmental changes. Noctilucent clouds are the only place on Earth where we find non-hexagonal ice forms, and hold fascinating and yet poorly understood chemistry. In this project we … Continue reading PHD Position: ULTRACOOL CHEMISTRY IN NOCTILUCENT CLOUDS

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