1. Structure Controlled Synthesis of Single-Walled Carbon Nanotubes

Nanotechnologies based on single walled carbon nanotubes (SWNTs) are developing very rapidly because of their outstanding mechanical, electrical, and optical properties. However, large scale synthesis of SWNT with desired structures still have many difficulties. We focuse on structure controlled sysnthesis of SWNTs in a high density and quality using a chemical vapor deposition and the selective diameter distribution of vertically aligned single walled carbon nanotubes (VA-SWNTs).

2. Controlled Synthesis of Graphitic Carbon Based Materials and Their Applications

The synthesis of carbon nanostructures, with interesting morphologies, has created a revolution in nanotechnology; carbon nanotube is a case in point, but other nanoscale morphologies of graphitic carbon could provide compelling uses. We focus on the building architectures from graphitic carbon, having up to 10⁵ times smaller length/diameter(L/D) ratios compared to conventional nanotubes, revealing unique morphologies of nanocups, nanorings, and large area connected nanocup arrays and their various applications of drug delivery, nanogram container, and energy storage and so on.

3. Flexible Carbon Nanotubes Based Devices and Applications

Flexible carbon nanotube based devices are candidate for the next generation electronics. We focuses on how to transfer carbon nanotube based structures such as film, pattern, line or individual nanotube onto different flexible polymer substrates to built devices and investigate the electrical, mechanical and optical properties of the nanodevices. The fluidic assembly and CVD technique will be utilized to build 1-D to 3-D carbon nanotube structure ranging from nanoscale to macroscale.

4. Highly Aligned, Organized, and Scalable SWNT Architectures for Nanoscale Interconnects

Aligned SWNT networks in nanoscale architectures become a promising material for future nanoscale interconnects. We fabricate highly aligned, organized, and scalable SWNT networks in nanosclae using a developed template guided fluidic assembly and decorate Platinum nanoclusters on their surfaces and investigate their electrical and thermal properties. Pt decoration on SWNTs using an electrochemical approach can simultaneously convert semiconducting CNTs into metallic ones, showing the increase of conductance of existing metallic CNTs.

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