Tan B. – TechConnect Briefs

Optical absorption enhancement of thin-film amorphous silicon induced by femtosecond laser pulses for solar cell fabrication

Kiani A., Venkatakrishnan K., Tan B., Ryerson University, CA

In this paper, we present a new method for direct-write laser fabrication of thin-film amorphous silicon (a-Si) on crystalline silicon substrate induced by femtosecond laser irradiation. Using megahertz frequency femtosecond laser pulses makes it possible [...]

Optical absorption enhancement of thin-film amorphous silicon induced by femtosecond laser pulses for solar cell fabrication

Kiani A., Venkatakrishnan K., Tan B., Ryerson University, CA

In this paper, we present a new method for direct-write laser fabrication of thin-film amorphous silicon (a-Si) on crystalline silicon substrate induced by femtosecond laser irradiation. Using megahertz frequency femtosecond laser pulses makes it possible [...]

Bioactivation of Titanium Surfaces by Femtosecond laser Processing

Tavangar A., Tan B., Venkatakrishnan K., Ryerson University, CA

In this study, we propose a novel yet simple method to generate titanium oxide 3-D nanofibrous structures on the titanium implants using femtosecond laser machining. The femtosecond laser pulses hit the titanium substrate and generate [...]

Rapid Fabrication of Nanofibrous Membranes inside microchannels using Femtosecond Laser Micromaching

Tavangar A., Tan B., Venkatakrishnan K., Ryerson University, CA

In this paper, we propose a single-step technique to develop membrane-based microfluidic channels using femtosecond laser micromachining. The proposed method fabricates both the nanoporous membrane and microfluidic channel in a single step under ambient condition. [...]

Novel High Energy Density Supercapacitors

Risser S., Tan B., Castaneda H., Spahr K., Stasik M., Battelle Memorial Institute, US

Cost-effective electrical storage is a critical need for enhancing current devices and enabling new devices and technologies. One of the storage types Battelle has been actively investigating is hybrid supercapacitors. Achieving high energy density in [...]

Novel High Energy Density Supercapacitors

Risser S., Tan B., Castaneda H., Spahr K., Stasik M., Battelle Memorial Institute, US

Cost-effective electrical storage is a critical need for enhancing current devices and enabling new devices and technologies. One of the storage types Battelle has been actively investigating is hybrid supercapacitors. Achieving high energy density in [...]

Maskless Lithography Using Patterned Amorphous Silicon Layer Induced by Femtosecond Laser Irradiation

Kiani A., Venkatakrishnan K., Tan B., Ryerson University, CA

In this research, we reported a maskless lithography method by a combination of laser amorphization of silicon and wet alkaline etching. This technique can lead to a promising solution for maskless lithography because in comparison [...]

Deposition of Interwoven Fibrous Nanostructure using Ultrafast Laser Ablation in Ambient Condition

Tavangar A., Tan B., Venkatakrishan K., Ryerson University, CA

In this paper, a new method for site-specific deposition of fibrous nanostructure is demonstrated using laser induced reverse transfer (LIRT). The LIRT method makes it achievable to generate and deposit fibrous nanostructure of a wide [...]