Personal & Home Care, Food & Agriculture – Page 36

Nanostructuring of Surfaces using Anodic Alumina Masks – Methods, materials and properties

Sawitowski T., Beyer N., Wagener S., Schulz F., AlCove Surfaces GmbH, DE

Since the discovery that cleanability is not necessarily linked to smoothness or gloss of surfaces it is interesting to take a closer look at methods allowing surfaces to be structured on a micrometer and nanometer [...]

Micro and Nano Structuring and Assembly

Molecular-Dynamics Study of Physical Properties in Sintered Nano-Particles

Kadau D., Kadau K., Lomdahl P.S., Entel P., Kadau D., Kadau K., Kreth M., Germann T.C., Holian B.L., Westerhoff F., Wolf D.E., Los Alamos National Laboratory, US

Nano-crystalline metals, in which the size of grains is in the nanometer range, exhibit physical properties different from ordinary polycrystalline materials, thus these materials are of technological interest [1]. One example is the increasing hardness [...]

The Electroreduction of Hydrogen on Pt(111)

Marzari N., Blum L., Car R., University of Puerto Rico, US

The electroreduction of hydrogen on Pt(111) in acidic media is the primary fuel cell reaction. The explicit mechanism for this process involves a first order phase transition, which is due to the rotation of the [...]

An Effective Model for Microscopic Intrinsic Localized Modes

Kalosakas G., Bishop A.R., Los Alamos National Laboratory, US

We present a system of coupled degrees of freedom that can effectively describe the localization of intra-molecular excitations in the charge transfer solid PtCl. These excitations correspond to the Raman active motion of chlorines (symmetric [...]

Three Dimensional Adhesion Model for Arbitrary Rough Surfaces

Deladi S., Krijnen G., Tas N.R., Elwenspoek M.C., University of TWente, NL

We present a 3D adhesion model based on the JKR theory applied locally for all contacting asperity couple and the calculations account the van der Waals interaction beside the externally applied force. Thus, equilibrium of [...]

Nanoscale Modeling for Condensed-Matter Phenomena

Water Conduction Through Carbon Nanotubes

Hummer G., Rassaiah J.C., Noworyta J.P., National Institutes of Health, US

In molecular dynamics simulations we found that water can form hydrogen-bonded water chains in the interior of carbon nanotubes. Water penetration is sensitive to details of thermodynamic conditions and interaction potentials, resulting in sharp, first-order [...]

DNA Translocation Across Protein Channels: How does a polymer worm through a hole?

Muthukumar M., University of Massachusetts, US

Conformational entropy of a polymer is reduced when the polymer confronts a narrow path. The reduction in entropy and the consequent free energy barriers control the polymer's translocation through narrow channels. Recent results on our [...]

Development of Thermodynamic Methods for the study of Nanopores

Paul R., Paddison S.J., University of Calgary, CA

A statistical mechanical formalism is presented for the calculation of the thermodynamic properties of the water in nanopores of polymer electrolytes, with particular emphasis on the polarization. We describe a method that exploits the variational [...]