Materials and Processing Innovations

Synthesis and Engineer
of Nano-Materials



Exploration of New Functionalities of



Controllable Assembly of Nano-Materials



Energy Harvesting, Nano-Electronics, Nano-Photonics, Sensors, etc



O Our research is at the exciting intersection of multiple disciplines, including chemistry, physics, materials science, and various engineering fields. We are dedicated to exploring innovative nanomaterials and pioneering nanoengineering techniques for a range of technological applications. Our work can be broadly divided into three major yet interconnected directions, each offering unique contributions to the scientific community.


-     1. Unveiling Novel Nanomaterials and Their Unique Physicochemical Properties:


- Our work is centered on systematically exploring and identifying groundbreaking nanomaterials, complemented by thoroughly examining their physicochemical properties. By utilizing state-of-the-art synthesis techniques and advanced analytical methods, we aim to uncover the unique quantum effects, surface phenomena, and size-dependent behaviors inherent to these novel nanomaterials. This comprehensive understanding aids in broadening the nanomaterial knowledge base, spurring progress in the field. For instance, we have successfully demonstrated the synthesis of high-quality, large-size novel nanomaterials, notably Bi2O2Se, transition metal dichalcogenides (TMDs), Te nanowires, and all-inorganic perovskites.


Related Publications:


Zhang Y., Meng Y.*, Wang L., Lan C., Quan Q., Wang W., Lai Z., Wang W., Li Y., Yin D., Li D., Xie P., Chen D., Yang Z., Yip S.P., Lu Y., Wong C.Y.*, Ho J.C.* "Pulse Irradiation Synthesis of Metal Chalcogenides on Flexible Substrates for Enhanced Photothermoelectric Performance", Nature Communications, 15, 728, 2024.


Li X.†, Meng Y.†, Li W.†, Zhang J., Dang C., Wang H., Hung S.W., Fan R., Chen F.R.*, Zhao S.*, Ho J.C.*, Lu Y.* "Multislip Enabled Morphing of All-Inorganic Perovskites", Nature Materials, 22, 1175-1181, 2023.


Meng Y.†, Li X.†, Kang X., Li W., Wang W., Lai Z., Wang W., Quan Q., Bu X., Yip S.P., Xie P., Chen D., Li D., Wang F.*, Yeung C.F., Lan C., Liu C., Shen L., Lu Y., Chen F., Wong C.Y.*, Ho J.C.* "Van der Waals Nanomesh Electronics on Arbitrary Surfaces", Nature Communications, 14, 2431, 2023.


Wang W.†, Meng Y.†, Zhang Y., Zhang Z., Wang W., Lai Z., Xie P., Li D., Chen D., Quan Q., Yin D., Liu C., Yang Z., Yip S.P., Ho J.C.* "Electrically Switchable Polarization in Bi2O2Se Ferroelectric Semiconductors", Advanced Materials, 35, 2210854, 2023.



-     2. Fabrication of Innovative Optoelectronic Devices through Phase Change, Doping, and Multi-dimensional Heterostructure Engineering:


- Our focus involves integrating phase change, doping techniques, and multi-dimensional heterostructure engineering to create state-of-the-art optoelectronic devices. Phase change and doping modulation introduce dynamic changes in the electronic properties of materials, thereby amplifying their optoelectronic functionality. Simultaneously, multi-dimensional heterostructure engineering entails the meticulous arrangement of materials across various dimensions to optimize electronic and optical interactions. Through this refined approach, we strive to fabricate novel optoelectronic devices (e.g., neuromorphic optoelectronics) exhibiting superior performance attributes, such as enhanced light absorption, charge transport, and quantum efficiency.


Related Publications:


Wang W., Meng Y., Wang W., Xie P., Quan Q., Li B., Lai Z., Yip S.P., Li D., Chen D., Li Y., Yin D., Zhang Y., Ho J.C.* "Multifunctional Anti-ambipolar Electronics Enabled by Mixed-dimensional 1D GaAsSb/2D MoS2 Heterotransistors", Device, 1,100184, 2023.


Zha J., Xia Y., Shi S., Huang H., Li S., Qian C., Wang H., Yang P., Zhang Z., Meng Y., Wang W., Yang Z., Yu H., Ho J.C.*, Wang Z.*, Tan C.* "A 2d Heterostructure-Based Multifunctional Floating Gate Memory Device for Multimodal Reservoir Computing", Advanced Materials, 36, 2308502, 2024.


Xie P.†, Chen X.†, Zeng Z., Wang W., Meng Y., Lai Z., Quan Q., Li D., Wang W., Bu X., Tsang S.W., Yip S.P., Sun J.*, Ho J.C.* "Artificial Visual Systems with Tunable Photoconductivity Based on Organic Molecule-Nanowire Heterojunctions", Advanced Functional Materials, 33, 2209091, 2023.


Meng Y.†, Li F.†, Lan C., Bu X., Kang X., Wei R., Yip S., Li D., Wang F., Takahashi T., Hosomi T., Nagashima K., Yanagida T., Ho J.C.* "Artificial Visual Systems Enabled by Quasi-Two-Dimensional Electron Gases in Oxide Superlattice Nanowires,", Science Advances, 6, eabc6389, 2020.



-     3. Advancements in Electrochemical Hydrogen Production and Ammonia Synthesis:


- Our goal concentrates on the electrochemical processes involved in hydrogen production and ammonia synthesis. By leveraging nanomaterials as catalysts, we facilitate the efficient splitting of water into hydrogen and oxygen, a critical step in electrochemical hydrogen production. Concurrently, we delve into the intricacies of nitrate reduction for ammonia synthesis, a key component of the nitrogen cycle, with the potential to revolutionize sustainable fertilizer production. Our research underscores the design and optimization of nanomaterial-based electrocatalysts, assessing their effectiveness and durability in electrochemical processes. Ultimately, our goal is to drive advancements in eco-friendly and efficient energy storage and production methods, thereby promoting sustainable practices on a broader scale.


Related Publications:


Quan Q., Zhang Y., Li S.*, Yip S.P., Wang W., Xie P., Chen D., Wang W., Yin D., Li Y., Liu B., Ho J.C.* "Multiscale Confinement Engineering for Boosting Overall Water Splitting by One-step Stringing a Single Atom and a Janus Nanoparticle within a Carbon Nanotube", ACS Nano, 18, 1204-1213, 2024.


Yin D., Chen D., Zhang Y., Wang W., Quan Q., Wang W., Meng Y., Lai Z., Yang Z., Yip S.P., Wong C.Y.,* Bu X.,* Wang X., Ho J.C.* "Synergistic Active Phases of Transition Metal Oxide Heterostructures for Highly Efficient Ammonia Electrosynthesis", Advanced Functional Materials, 33, 2303803, 2023.


Chen D., Zhang S., Yin D., Li W., Bu X., Quan Q., Lai Z., Wang W., Meng Y., Liu C., Yip S.P., Chen F.R., Zhi C., Ho J.C.* "Tailored p-Orbital Delocalization by Diatomic Pt-Ce Induced Interlayer Spacing Engineering for Highly-Efficient Ammonia Electrosynthesis", Advanced Energy Materials, 13, 2203201, 2023.


Quan Q., Zhang Y., Wang F., Bu X., Wang W., Meng Y., Xie P., Chen D., Wang W., Li D., Li C., Yip S.P., Ho J.C.* "Topochemical Domain Engineering to Construct 2D Mosaic Heterostructure with Internal Electric Field for High-Performance Overall Water Splitting", Nano Energy, 101, 107566, 2022.



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