Biris A.S. – TechConnect Briefs

Fabrication of superhydrophobic PVDF membranes with PTFE nano-film surface coatings

Abdulhussein A.T., Kannarpady G.K., Biris A.S., University of Arkansas at Little Rock, US

Due to their outstanding corrosion resistance, wear resistance, thermal stability, and chemical stability, polyvinylidene fluoride (PVDF) membranes are extensively used for membrane distillation, membrane contactor, oil/water separation, and wastewater treatment. Modifying a PVDF membrane with [...]

High Throughput Screening of Nanomaterials: The Arkansas Research Consortium in Nanotoxicity, a partnership between Arkansas and the FDA

Howard P.C., Biris A.S., Salamo G.J., Zharov V.P., Buchanan R.A., Arkansas Research Alliance, US

The state of Arkansas and the FDA Center of Toxicological Research have begun a collaborative effort to develop techniques for high-throughput, rapid screening of existing and yet-to-be developed nanomaterials. To accomplish this the Arkansas Research [...]

Superhydrophobic coating using metallic nanorods for aerospace applications

Kannarpady G.K., Lefrileux Y., Laurent T., Woo J., Khedir K.R., Ishihara H., Trigwell S., Ryerson C., Biris A.S., University of Arkansas at Little Rock, US

The paper presents a novel technique that combines anodization and glancing angle sputtering deposition to generate nanorods of Aluminum. The nanorod surface coated with a monolayer of a silane exhibited contact angle of 155 degree [...]

Carbon Nanotubes and Grephene for Solar Cells

Li Z., Dervishi E., Saini V., Bourdo S., Biris A.S., University of Arkansas at Little Rock, US

Carbon nanotubes and graphene represent attractive materials for photovoltaic devices. Single wall carbon nanotubes (SWNTs) bear many superior properties for photovoltaic application such as a wide range of direct bandgaps matching the solar spectrum, strong [...]

Large area graphene sheets synthesized on a bi-metallic catalyst system

Dervishi E., Li Z., Shyaka J., Watanabe F., Biswas A., Umwungeri J.L., Courte A., Biris A.R., Biris A.S., Biris A.R., Biris A.S., University of Arkansas at Little Rock, US

Few layer graphene sheets were synthesized on a bimetallic catalyst system utilizing acetylene as the hydrocarbon source. This is a low-cost method for large scale production of graphene via radio-frequency chemical vapor deposition. The as-produced [...]

In Vivo Real Time Raman Spectroscopy Detection of Carbon Nanotube Kinetics in Lymph, Blood and Tissues

Biris A.S., Galanzha E.I., Li Z., Mahmood M., Xu Y., Dervishi E., Zharov V.P., University of Arkansas at Little Rock, US

The development of novel therapies using unique nanostructures for molecular targeting has become a major area of biological research. Here, we present the first report of the use of carbon nanotubes (CNTs) as high contrast [...]

p-Type Single-Wall Garbon Nanotube Network on n-Type Si for Heterojunction Photovoltaic Cells

Li Z., Xu Y., Saini V., Dervishi E., Mahmood M., Biris A.R., Biris A.S., Biris A.R., Biris A.S., University of Arkansas at Little Rock, US

The solar cells based on high-density p-n heterojunctions between single wall carbon nanotubes (SWNTs) and n-type crystalline silicon were produced with airbrushing technique. The SWNTs/n-Si heterojunction is rectifying. Under optical excitation the numerous heterojunctions formed [...]