University of Virginia – Page 2

Durability of a superhydrophobic nanocomposite coating under extended replicated rain impact

Davis A., Yeong Y.H., Steele A., Bayer I., Loth E., DeCombarieu G., University of Virginia, US

The objective of this study was to test the mechanical durability of a polyurethane/organoclay nanocomposite modified with perfluoroalkyl methacrylic copolymer in conditions that replicate extended rain impact. Samples were impacted with 1.4 mm droplets at [...]

An Electrolytic Reaction to Resist Saturation on Conductive Superhydrophobic Nanocomposites

Cheek J., Steele A., Loth E., University of Virginia, US

The following abstract investigates superhydrophobic nanocomposite surfaces that are continuously submerged in water. Unfortunately, the surfaces lose superhydrophobic functionality under constant contact with water. Until recently, there has been little analysis on this performance behavior. [...]

Adhesion strength and superhydrophobicity in polyurethane/organoclay nanocomposites

Steele A., Bayer I., Yeong Y.H., Loth E., University of Virginia, US

Polyurethane coatings are used on many different materials and in a wide variety of applications due to its high durability and adaptable chemical composition. Although there are a number of reports on the fabrication of [...]

Impact of Temperature and Humidity on Superhydrophobicity of Polyurethane/Organoclay Nanocomposites

Yeong Y.H., Steele A., Bayer I., Lakeman C., De Combarieu G., Loth E., University of Virginia, US

Recent preliminary investigations show that superhydrophobic coatings have the capability to reduce both ice accumulation and adhesion on a surface. Although there are recent studies of anti-icing superhydrophobic surfaces, the authors are not aware of [...]

Public Policy and Cleantech – Obstacle or Asset?

Wardak A., Taneja V., University of Virginia, US

Alongside the development, commercialization, and entrance of clean technologies (i.e. cleantech) into mainstream North American markets, has been the North America investment community, which has made great strides to support cleantech innovations.

Nanomaching of Silicon nanoporous Structures by Colloidal Gold Nanoparticle

Zhu J., Bart-Smith H., Begley M.R., Kelly R.G., Zangari G., Reed M.L., University of Virginia, US

We report an efficient method for fabricating nanoporous structures in crystalline silicon, using colloidal gold nanoparticles in HF/H2O2 etchant. Colloidal gold in HF/H2O2 solutions accelerates the etching rate by two orders of magnitude and simultaneously [...]

Risk Identification and Assessment Techniques in the Absence of Toxicology Data on Nanomaterials

Wardak A., Deshpande S., Swami N., Gorman M., University of Virginia, US

A National Science Foundation-sponsored survey identified regulatory and safety issues as market entry barriers for nanotechnology. The limited availability of toxicological data on nanomaterials, especially from studies using standardized protocols (biological system to be studied) [...]