adhesion – Page 2 – TechConnect Briefs

Atmospheric Plasma Surface Modification of Polytetrafluoroethylene Films for Metal Deposition

Stein B.E., Bujanda A.A., Strawhecker K.E., Pappas D.D., U.S. Army Research Laboratory, US

This work details the use of atmospheric-pressure dielectric barrier discharge plasmas to enhance the adhesion of thin metal coatings to PTFE films. Differences in energetic plasma species have a pronounced effect on resulting wettability. Increased [...]

Adhesion of Water on Flat Polymer Surfaces and Superhydrophobic Surfaces

Law K-Y, Zhao H., Samuel B., Xerox Corporation, US

The interaction of water droplet with flat polymer surfaces of varying hydrophobicity (contact angle) has been studied using a high-sensitivity microelectromechanical balance system (tensiometer). Both attractive force and pull-off force are studied as the water [...]

PVDF based polymer nanocomposite coatings for large area applications

Tiwari M.K., Bayer I.S., Megaridis C.M., University of Illinois at Chicago, US

A class of polymer nanocomposites consisting of all biocompatible components has been developed for large area coating applications. The coatings are made possible by solution blending of poly (vinylidine fluoride) (PVDF) with polymerized ethyl cyanoacrylate. [...]

Characterization of Silane Nanoadhesion by means of Dynamic Force Spectroscopy

Ptak A., Makowski M., Niemier M., Cichomski M., Gojzewski H., Czajka R., Poznan University of Technology, PL

Using a modified atomic force microscope the nanoadhesion between a silicon tip and a monolayer of 1H, 1H, 2H, 2H-perfluorodecyl-trichlorosilane was measured at different loading rates. Adhesion force-versus-loading rate curves could be fitted with two [...]

Analysis of density variation for different temperatures in thermal nano imprinting process

Lee D.E., Lee H.J., Lee W.I., Lee D.E., Lee H.J., Lee W.I., Choi S-W, Lee D.E., Lee H.J., Lee W.I., Seoul National University, KR

Density variation of the polymer resist for different temperatures in thermal nano imprinting1 process was studied by both experiments and molecular dynamics (MD) simulations. After patterning, we estimated the local density by measuring the pull-off [...]

A Markedly Cntrollable Adhesion of Superhydrophobic Sponge-like Nanostructure TiO2 Films

Lai Y., Lin C., Huang J., Zhuang H., Sunb L., Nguyen T., Xiamen University, CN

A method consisting of electrochemical anodization and self-assembling of hydrophobic-hydrophilic mixture has been employed to fabricate superhydrophobic sponge-like nanostructured TiO2 surfaces with remarkably controllable adhesion. Water adhesion ranged from ultra-low (5.0 N) to very high [...]

Molecular Simulation of the Nanoscale Water Confined between an Atomic Force Microscope Tip and a Surface

Choi H.J., Kim J-Y, Hong S.D., Ha M.Y., Jang J., Pusan National University, KR

Under ambient humidity, water condenses as a meniscus between an atomic force microscope (AFM) tip and a surface, giving rise to a strong capillary force on the tip. We performed a molecular dynamics simulation of [...]

A Markedly Cntrollable Adhesion of Superhydrophobic Sponge-like Nanostructure TiO2 Films

Lai Y., Lin C., Huang J., Zhuang H., Sunb L., Nguyen T., Xiamen University, CN

A method consisting of electrochemical anodization and self-assembling of hydrophobic-hydrophilic mixture has been employed to fabricate superhydrophobic sponge-like nanostructured TiO2 surfaces with remarkably controllable adhesion. Water adhesion ranged from ultra-low (5.0 N) to very high [...]

Innovative PMMA/Silica nanocomposites for optical and biomedical applications

Avella M., De Petrocellis L., Di Pace E., Errico M.E., Gentile G., Orlando P., ICTP-CNR, IT

The main goal of this research is the preparation of new PMMA/Silica nanocomposites with improved mechanical properties and highly specific bio-activity. PMMA based nanocomposites reinforced with modified silica nanoparticles have been prepared and characterized. Transparency [...]

Effects of Silicon Nanowires on HepG2 Cell Adhesion and Spreading

Qi S., Yi C., Chen W., Fong C-C, Lee S-T, Yang M., City University of Hong Kong, CN

The unique capabilities of nanomaterials make them good candidates for catalysts, biosensors, and even drug carriers. However, interactions of nanomaterials with biological systems and the environment may lead to potential toxicity. While there have been [...]