DEPARTMENT OF APPLIED PHYSICS 136 Email xuming.zhang@polyu.edu.hk Qualification BEng (University of Science & Technology of China) MEng (National University of Singapore) PhD (Nanyang Technological University) ORCID ID 0000-0002-9326-5547 Prof. ZHANG Xuming Professor Associate Head of Department Research Overview Prof. Zhang's research interests cover mainly microfluidics, photocatalysis, biomimetics, micro-/nano-optics, plasmonics, and biomedical sensors. Representative Publications • Catal. Sci. Technol. 2022, 12, 5009–5020 (Front Cover) • ACS Photon. 2022, 92, 652–663 • Angew. Chem. Int. Ed. 2022, 61, e202117645 • Nanoscale 2021, 13, 2792-2800 (Inside front cover) • Nat. Commun. 2019, 10, 4049 Recent Representative Results (1) Mimicking the enzyme attachments in chloroplast, we have developed a physical method to immobilise RuBisCO into a microfluidic reactor to synthesise glucose precursor from CO2 and RuBP. It performs close to the chemical immobilisation and restores >95% activity after 5 cycles of refreshing. Scaling out from one reactor to multiple parallel reactors was also carried out as a proof-of-concept for the large-scale synthesis. The merits of non-specificity, refreshability, reusability and scalability make it high potential for multi-enzymatic reactions like the Calvin cycle. (2) Strong coupling of multiple resonant modes has enhanced the generation of plasmon-induced hot carriers by using a metaldielectric-metal (MDM) nanocavity. The MDM consists of an Au nanohole array, a TiO2 thin film and an Au reflector, and supports intensive coupling among Fabry-Pérot mode, localised and propagating surface plasmon resonance modes in a single structure, resulting in a notably enhanced efficiency of sunlight for photochemistry and photovoltaics. (3) Metallic nanohole arrays exciting both surface plasmon polariton (SPP) and localised surface plasmon resonance (LSPR) in a single thin film has sparked considerable interest in the field of plasmonics. We bury an Au nanohole array (AuNHA) under a thin TiO2 layer and decorate Pt nanoparticles on the surface to form the Pt/TiO2/AuNHA nanocomposite. It enhances the photocurrent density, the energy efficiency and the organic degradation by 4.1, by 14.7 and 9.4 times, respectively. This is the first study of AuNHA fully covered by a thin TiO2 film and provides a unique design of photoelectrodes for solar photocatalysis applications. Patents • China Patents of Invention ZL201910479720.3, 2021 • China Patents of Invention ZL201710855251.1, 2020
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