Panchapakesan B. – TechConnect Briefs

Photoconductivity of Reduced Graphene Films

Loomis J., Panchapakesan B., University of Louisville, US

In this paper, we report large photocurrents in air-assisted depositions of reduced graphene films (derived from reduced single layer graphene oxide) upon illumination with near-infrared (NIR) light. NIR-induced charge carrier generation and subsequent separation at [...]

Mechanical Properties of Reduced Graphene Polymer Composites

Xu P., Panchapakesan B., University of Louisville, US

In this paper, we report load transfer and mechanical properties of chemically derived single layer graphene (SLG) as reinforcements in poly (dimethyl) siloxane (PDMS) composites. Shear mixing reduced graphene sheets in polymers resulted in a [...]

Near-Infrared Light Induced Mechanical Responses in Single-to-Few Layer Graphene

Loomis J., King B., Panchapakesan B., University of Louisville, US

Layer dependent physical responses of graphene-based polymer composites to near-infrared (NIR) light are reported. Thin film polymer composites were fabricated and compared utilizing both single layer graphene and few layer graphene (~5 layers). NIR-induced axial [...]

Photomechanical Response in Graphene Nanoplatelet Composites

Loomis J., King B., Burkhead T., Xu P., Bessler N., Terentjev E., Panchapakesan B., University of Louisville, US

Large light-induced reversible and elastic responses of graphene nanoplatelet (GNP) polymer composites are reported. Homogeneous mixtures of GNP/polydimethylsiloxane (PDMS) composites (0.1–5 wt%) were prepared and their near-infrared (NIR) mechanical responses studied with increasing pre-strains. Using [...]

Carbon Based Dimensional Composites

Loomis J., King B., Panchapakesan B., University of Louisville, US

Dimensional dependence of mechanical response in carbon nanostructure composites to near-infrared (NIR) light are reported. Using polydimethylsiloxane, composites were fabricated with one-dimensional multi-wall carbon nanotubes (MWCNTs), two dimensional single-layer graphene, two and a half-dimensional graphene [...]

Carbon Nanotubes as Molecular Nanocarriers for Antibody Delivery and Photothermal Ablation of Breast Cancer Cells

Panchapakesan B., Wickstrom E., University of Louisville, US

In this paper, the utilization of carbon nanotubes as nanocarriers for antibody delivery to IGF1R and HER2 surface receptors and selective thermal ablation of breast cancer cells is presented. IGF1R and Her2 surface receptors are [...]

Nanotube Biosensor Arrays for Detection of Molecular Surface Markers in Breast Cancer Cells

Panchapakesan B., Wickstrom E., University of Louisville, US

Recent reports have shown that nanoscale electronic devices can be used to detect a change in electrical properties when receptor proteins bind to their corresponding antibodies functionalized on the surface of the device, in extracts [...]

Detection of Live Breast Cancer Cells Using Carbon Nanotube Devices

Teker K., Cesarone G., Wickstrom E., Panchapakesan B., Frostburg State University, US

Development of new technologies for reliable early detection of cancer from biological fluids via minimally invasive methods is still a high priority. Cancer cells often overexpress characteristic surface receptors, which provide an opportunity for early [...]

Single wall Carbon Nanotube Optical Actuators: Towards Optical Artificial Muscles

Lu S., Panchapakesan B., University of Delaware, US

The direct conversion of electrical energy to mechanical energy has been realized by various types of actuation technologies. But the direct conversion of optical energy to mechanical energy is rarely touched to date. Here we [...]

Platinum Nanowire Actuator: Metallic Artificial Muscles

Lu S., Sivakumar K., Panchapakesan B., University of Delaware, US

In this paper, we have fabricated platinum nanowires by using carbon nanotube as templates and have shown its applications for nanoactuation using electro-chemical actuation techniques.The strain response of the nanowire is measured and a total [...]