Research summary
Contributions concentrate on two-dimensional materials for electrocatalysis, ultrafast photonics, and biomedical applications. Defect-rich MoS2 ultrathin nanosheets synthesised at gram scale showed a low onset overpotential, small Tafel slope, and durable performance for the hydrogen-evolution reaction, attributed to additional active edge sites in the defect-rich structure [1]. Atomic-layer graphene was demonstrated as a saturable absorber for ultrafast pulsed lasers, producing 756 fs soliton pulses in a mode-locked fibre laser at the telecommunication band, with the modulation depth tunable between 6.2 and 66.5 percent by varying the graphene loading [2]. Few-layered MoS2 nanoplatelets were characterised by open-aperture Z-scan and balanced-detector measurements across the visible to near-infrared range and integrated into a mode-locker for an ytterbium-doped fibre laser [3]. Black phosphorus (BP) was extended into ultrafast photonics: NMP solvent exfoliation produced layer-controlled phosphorene with water stability and Raman thickness fingerprints [4], mechanically exfoliated BP was demonstrated as a saturable absorber for both Q-switching and mode-locking [5], and ultrasmall BP quantum dots (~2.6 nm lateral, ~1.5 nm thick) were synthesised by combined probe and bath sonication, showing 28.4 percent photothermal conversion efficiency at 808 nm and selective NIR-triggered cancer-cell killing in vitro [7]. PEGylated BP nanosheets were developed as a delivery platform whose endocytosis pathways and biological activity in cancer cells were characterised, with a triple-response combination therapy demonstrated [8]. Two review papers cover the broader two-dimensional materials landscape: MXenes' morphological, optical, electric, and magnetic properties since their 2011 discovery [6], and emerging 2D materials and their applications [9]. The set traces the same author thread from electrocatalysis through ultrafast photonics to nanomedicine.
Recent publications
- Defect鈥怰ich MoS2 Ultrathin Nanosheets with Additional Active Edge Sites for Enhanced Electrocatalytic Hydrogen EvolutionDOI
- Atomic鈥怢ayer Graphene as a Saturable Absorber for Ultrafast Pulsed LasersDOI
- Broadband graphene polarizerDOI
- Molybdenum disulfide (MoS_2) as a broadband saturable absorber for ultra-fast photonicsDOI
- From Black Phosphorus to Phosphorene: Basic Solvent Exfoliation, Evolution of Raman Scattering, and Applications to Ultrafast PhotonicsDOI
- Mechanically exfoliated black phosphorus as a new saturable absorber for both Q-switching and Mode-locking laser operationDOI
- Two-dimensional MXenes: From morphological to optical, electric, and magnetic properties and applicationsDOI
- Ultrasmall Black Phosphorus Quantum Dots: Synthesis and Use as Photothermal AgentsDOI
- Black Phosphorus Nanosheets as a Robust Delivery Platform for Cancer TheranosticsDOI
- Recent developments in emerging two-dimensional materials and their applicationsDOI
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Email Han Zhang 6-12 months before your application deadline. Read several recent papers and reference specific work in your message. Use our how to email a Japanese professor guide for the proven email structure.
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External profiles
- ORCID: https://orcid.org/0000-0002-0166-1973
- OpenAlex: openalex.org
Profile compiled from public sources (Researchmap, OpenAlex, University of Tsukuba faculty directory). Last refreshed 2026-05. Report incorrect information.