Electronic Nanomaterials

 

Related research topics in our group:

  • Flexible, Stretchable, Wearable, Healable Electronics

  • Nanostructures, 2D Materials

  • Graphene-Polymer Nanocomposite

  • Sensor and Energy Applications

Our group focuses on electronic nanomaterials for both sensing and energy applications, with emphasis on flexible, stretchable and healable materials for wearable applications. We have activities in synthesis, characterization, and device fabrication.

Materials Synthesis:

Focusing primarily on electronic properties, we synthesize 2D/few-layered materials, porous materials, nanoparticles, nanocomposites, and nanostructured thin-films. Depending on the required structure, morphology, and properties, we have experimented with a wide range of materials including TMD, sulfides, graphene, multi-element oxides, and black phosphorus. Our synthesis techniques range from low-temperature solution processes (e.g. hydrothermal/solvothermal), chemical vapor deposition (CVD), to pulsed laser deposition (PLD), evaporation, and sputtering. Post-fabrication processing is also investigated such as surface modification, doping, ion implantation, and thermal annealing.

Materials Characterization:

The Lab is well equipped with materials synthesis, characterization, device fabrication, and integration facilities. Specifically, we have capabilities in synthesis (e.g. CVD, PLD, sputtering, hydrothermal, soft chemistry routes), characterization (e.g. SEM, TEM, XRD, XPS, Raman, FTIR), device fabrication, (e.g.  micro-plotter, programmable laser, electro-spinners), and various testing platforms (e.g. mechanical/tensile tester, semiconductor parameter analyzer, gas sensing with environmental control, electrochemical/impedance analyzer).

Device Realization:

Nanomaterials are realized into various device structures to serve a variety of practical functions. Device structure is often a major consideration to the performance and durability. We explore several key device aspects including the engineering of interfaces, contact, and mechanical robustness for flexible electronics. This effort allows us to develop practical and commercializable devices, often in collaboration with industry.

Selected publications:

W R Yan, J H Li, G P Zhang, L Wang*, and D Ho*, "Synergistic self-assembled 3D PEDOT:PSS/graphene composite sponge for stretchable microsupercapacitors," Journal of Materials Chemistry A (JMCA), 8, 2, 2020.

Q Tian, W Yan, Y Li, and D Ho*, "Bean pod-inspired ultra-sensitive and self-healing pressure sensor based on laser induced graphene and polystyrene microspheres sandwiched structure," ACS Applied Materials and Interfaces, 12, 2020.

 

W Yan, T Chen, J Xu, Q Tian, and D Ho*, "Size-Tunable flowerlike MoS2 nanospheres combined with laser-induced graphene electrodes for NO2 sensing," ACS Applied Nano Materials, 3, 3, 2020.