JT Web

Thermal & Thermoelectric Properties of Nanomaterials Experimental & theoretical investigations of thermal transport and thermal properties of low-dimensional material systems. Research in this area is carried out in collaboration with Professor Li Baowen (Department of Physics, NUS).		Measurement of thermal conductance of graphene using themal bridge technique. The graphene is placed between a heater / sensor, which also allows for simultaneous 4-point electrical measurements.
Graphene & Related Materials Ongoing research projects include synthesis of graphene via CVD, etching of nanoribbons, and ion-irradiation studies on graphene and other 2-D materials.		Graphene tubes synthesized on nickel nanowire templates. Number of graphene layers is determined by growth duration, while the tube length and diameter are defined by the dimensions of the nanowire template.
Nanowires & Nanotubes Synthesis. characterization and applications of one-dimensional metallic, metal-oxide, semiconductor, and carbon materials. In addition to conventional synthesis approaches, we had previously developed a new approach to nanowire growth using a field-emission induced growth (FEIG) process. Our research interest includes devices for sensing, as well as for field emitters.		Tungsten nanowire grown from the tip of a vertically-aligned carbon nanotube. The FEIG approach allows nanowire connections to be made to 1-D nanostructures.
Nanogap Devices for Biosensing Polymer-protected nanogap devices with a self-aligned hole in the polymer layer above the nanogap are realized by polymer ablation when a gap opens by electromigration. The devices allows trapping and conductance measurement of DNA molecules in the electrode gap to be conducted under aqueous conditions while minimizing ionic currents through the solution.		DNA detection by PMMA-protected nanogap and the use of oligonucleotide-modified gold nanopartiles. Polymer protection of the electrodes from the ionic solution enabled significant reduction in background current and markedly improved signal-to-noise ratio.

Thermal & Thermoelectric Properties of Nanomaterials

Experimental & theoretical investigations of thermal transport and thermal properties of low-dimensional material systems. Research in this area is carried out in collaboration with Professor Li Baowen (Department of Physics, NUS).

Measurement of thermal conductance of graphene using themal bridge technique. The graphene is placed between a heater / sensor, which also allows for simultaneous 4-point electrical measurements.

Graphene & Related Materials

Ongoing research projects include synthesis of graphene via CVD, etching of nanoribbons, and ion-irradiation studies on graphene and other 2-D materials.

Graphene tubes synthesized on nickel nanowire templates. Number of graphene layers is determined by growth duration, while the tube length and diameter are defined by the dimensions of the nanowire template.

Nanowires & Nanotubes

Synthesis. characterization and applications of one-dimensional metallic, metal-oxide, semiconductor, and carbon materials. In addition to conventional synthesis approaches, we had previously developed a new approach to nanowire growth using a field-emission induced growth (FEIG) process. Our research interest includes devices for sensing, as well as for field emitters.

Tungsten nanowire grown from the tip of a vertically-aligned carbon nanotube. The FEIG approach allows nanowire connections to be made to 1-D nanostructures.

Nanogap Devices for Biosensing

Polymer-protected nanogap devices with a self-aligned hole in the polymer layer above the nanogap are realized by polymer ablation when a gap opens by electromigration. The devices allows trapping and conductance measurement of DNA molecules in the electrode gap to be conducted under aqueous conditions while minimizing ionic currents through the solution.

DNA detection by PMMA-protected nanogap and the use of oligonucleotide-modified gold nanopartiles. Polymer protection of the electrodes from the ionic solution enabled significant reduction in background current and markedly improved signal-to-noise ratio.