Portland State University – Page 2

Polymer nanocomposite based chemiresistive gas sensors

Meka D.A., George L.A., Prasad S., Portland State University, US

We present here the development of a polymer nanocomposite based gas sensor for detecting trace gas emissions in ambient environment. This project is aimed to build a chemiresistive gas sensor with excellent sensitivity and improved [...]

A Comparative Analysis of Iridium Oxide Nanowires in Electrical Detection of Biochemical Reactions

Venkatraman V.L., Reddy R.K., Zhang F., Hsu V., Ulrich B., Prasad S., Portland State University, US

Pt, Ir, Au and few other precious metals have highly conducive electrical and chemical properties; hence have been widely used in pH sensors and biomolecular sensing applications. The chief objective of this research is to [...]

Nanomonitors: Electrical Immunoassays towards Clinical Diagnostics

Bothara M., Prasad S., Barrett T., Carruthers J., Portland State University, US

We present here the development and tetsing of a protein biosensor operating on electrical capacitance changes as a measure for idnetifying protein biomarkers that are indicators of vulnerale coronary vascular plaque. The prototype of the [...]

Identification of individual nanocrystal structures and morphologies by TEM

Moeck P., Portland State University, US

Two novel methods for the structurally identification of a nanocrystal from either a single high resolution (HR) transmission electron microscopy (TEM) micrograph or a single electron precession diffractogram are described. While the structural information that [...]

Palladium/Polymer nanocomposite based Chemiresistive SO2 Sensor

Meka D., Onbattuvelli V., Atre S., Prasad S., Portland State University, US

Here we present a highly sensitive nanocomposite based Chemiresistive SO2 sensor. The main objective of this research is focused on developing a cost effective, integrable and disposable gas sensor which detects SO2 gas molecules in [...]

Bismuth Triiodide Sheets Assisted Growth of Cadmium Sulfide Binary Crystals and Branched Nanowires in Solution

Li H.Y., Jiao J., Portland State University, US

Semiconductor nanowires demonstrate their potential in the fabrication of electronic and optic nanodivices. As one of the most important II-VI group semiconductors, CdS nanowires have been synthesized by metal catalyzed vapor-liquid-solid (VLS) and vapor-solid (VS) [...]

Nanoporous Alumina Membranes Based Microdevices for Ultrasensitive Protein Detection

Bothara M.G., Reddy R.K., Barrett T., Carruthers J., Prasad S., Portland State University, US

This research focuses on using the electrical and chemical properties of nanoporous alumina membranes to improve the sensitivity and performance of Si-based microdevices for protein sensing. The integration of nanoporous membranes with the microdevice results [...]

Single Walled Carbon Nanotubes based Ionic Building Blocks for Nanoelectronic Devices

Yadav Y., Prasad S., Portland State University, US

We present electrical characterization of crossbar ionic nanodevices built using surfactant coated single walled carbon nanotubes (SWCNT’s) via microcontact printing. These nanotube ionic building blocks were synthesized using intrinsic semiconducting SWCNT’s doped with surfactant molecules, [...]

Bulk Heterojunction Organic-Inorganic Photovoltaic Cell Based on Doped Silicon Nanowires

Goncher G., Noice L., Solanki R., Portland State University, US

A bulk heterojunction organic-inorganic photovoltaic cell was fabricated by growing doped n-type silicon nanowires on an n+ silicon substrate. A p-type organic semiconductor (P3HT) was then coated over the nanowires. The device was completed by [...]

Bulk Heterojunction Organic-Inorganic Photovoltaic Cell Based on Doped Silicon Nanowires

Goncher G., Noice L., Solanki R., Portland State University, US

A bulk heterojunction organic-inorganic photovoltaic cell was fabricated by growing doped n-type silicon nanowires on an n+ silicon substrate. A p-type organic semiconductor (P3HT) was then coated over the nanowires. The device was completed by [...]