Aidan Yiu School of Geography, Earth and Environmental SciencesPhD student Contact details AddressSchool of Geography, Earth and Environmental SciencesUniversity of Birmingham Edgbaston Birmingham B15 2TT UK Aidan Yiu is a PhD candidate in Environmental Health Sciences, supervised by Prof Eugenia Valsami-Jones, on a project entitled: "Nanoscale boundaries: understanding size effects on the reactivity of ultra-small particles." Doctoral research SupervisorProfessor Eugenia (Éva) Valsami-Jones