Assistant Professor, Department of Physics

Blk S12, Faculty of Science
National University of Singapore
2 Science Drive 3,
Singapore 117542

• Nanospheres Lithography, Invented Mirror-Image method for tracking 3D motion of suspended sub-micron particles; Measurements of interaction potential between charged sub-micron sphere and confining plates; Measurements of self-diffusion of sub-micron spheres in confined geometry; Developed single and multiple trap optical tweezers using focused laser beams; Discovered spinning colloidal cluster in the presence of a focused laser beam.

• Develop a laser pruning method to create unique 2D and 3D structure made of carbon nanotubes. Study of Optical and Electrical Properties of Carbon Nanotubes. Study of Field Emission properties of Unique Carbon Nanotube Arrays Large Area Patterning of Carbon Nanotube Arrays. MicroDevices made of Carbon Nanotubes.

Self-assembly and Assisted-Assembly of Nanomaterials

• Assembly of nanospheres with 3D Si pillars; Alignment of nanowires via fluidic flow; Demonstration of tweezers-assisted sphere assembly.

• Micromanipulation and extension of blood cells with optical tweezers. Study of the extension and twisting in DNA using an optical tweezers. Cell sorting studies with optical light field. Studies of flow of fluid in microfluidic channels.

• First direct measurement of the vortex pair interaction potential in a Type-II Superconductor.