Surface science postgraduate personal statement example

Personal statement example

My interest in surfaces grew out of a piece of coursework that did not go especially well. In second-year physical chemistry we were asked to explain why a catalyst's activity depended on its preparation route rather than its bulk composition. I wrote a competent answer about dispersion and particle size, then realised I had described the effect without understanding the mechanism. Reading around adsorption isotherms afterwards, I found that the question I had skipped over, what actually happens in the first few atomic layers, was the interesting one. Since then I have deliberately chosen modules and project work that sit at the interface between chemistry and materials.

My final-year project was on self-assembled monolayers of alkanethiols on evaporated gold. I prepared films from solutions of differing chain length and immersion time, then characterised them using static contact angle measurement and cyclic voltammetry with a ferricyanide probe to assess blocking behaviour. The work taught me how sensitive surface measurements are to things that look trivial: how the substrate was rinsed, how long it had been in air, whether the pipette tip had touched the beaker rim. My early results were scattered until I standardised cleaning and kept a substrate log, after which the trend of increasing hydrophobicity and better electrode blocking with chain length emerged clearly. I also learned to be honest about what a single technique can and cannot support. Contact angle told me something about surface energy and ordering, but I could not claim a defect density from it, and I wrote the discussion accordingly.

Alongside my degree I have read more widely than my modules required. Somorjai and Li's treatment of surface chemistry helped me see how structure-sensitive reactions can be, and I found the historical material on low-energy electron diffraction and single-crystal studies useful for understanding why ultra-high vacuum work exists at all, rather than treating it as an inconvenient tradition. What draws me to postgraduate study is the chance to work with techniques I have only read about: XPS, AFM and spectroscopic methods for buried interfaces. I am particularly interested in how far model single-crystal results transfer to the rougher, hydrated, partly contaminated surfaces that matter in corrosion protection and coatings, since that gap between the clean experiment and the real object seems to be where most of the difficulty lives.

Outside university my time is fairly structured. I share care of my younger brother, who is eleven, which means school runs, homework and a fixed evening routine; planning laboratory time around that has made me methodical about preparing samples and booking instrument slots in advance. I work weekend shifts in a bakery, where accuracy with proving times and oven loading matters more than people expect, and I volunteer monthly at a community repair session. The repair work is not chemistry, but it has taught me to diagnose patiently rather than replace immediately, and I have noticed how often failures are surface failures: corroded contacts, degraded cable insulation, worn coatings on kettle elements.

I would like to continue towards research and eventually work in industrial materials development, ideally on coatings or catalysis. Before that I want rigorous training in surface characterisation and a project long enough to let me follow a problem properly rather than stopping when the module ends. I am comfortable with careful, repetitive experimental work, willing to be corrected, and ready to spend a year learning techniques thoroughly.

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