transport – Page 2 – TechConnect Briefs

Interfacial effects and diffusion transport regimes in nanofluidic systems

Ziemys A., Milosevic M., Ferrari M., Kojic M., The Methodist Hospital Research Institute, US

Because the Peclet number is very small for nanofluidic systems, diffusion may be at least as important as the active mass transport. In nanoscale solid surfaces may alter fluid properties and diffusion at interface. Here, [...]

Field Emission Properties of Carbon Nanotube Arrays with Defects and Impurities

Roy Mahapatra D., Sinha N., Melnik R., Yeow J.T.W., University of Waterloo, CA

Field emission from carbon nanotubes (CNTs) in the form of arrays or thin films give rise to several strongly correlated process of electromechanical interaction and degradation. Such processes are mainly due to (1) electron-phonon interaction [...]

Characterization of DNA Transport through a Semipermeable Membrane with the Effect of Surfactants

Leung S.W., Bartolin S., Daniels C.K., Lai J.C.K., Idaho State University, US

In current advances of biotechnology, various models of introduction of DNA into cells to alter their gene expression have important biomedical and bioengineering applications. However, the molecular mechanisms underlying how DNA’s cross cell and nuclear [...]

Optimizing Multiscale Networks for Transient Transport in Nanoporous Materials

Nilson R.H., Griffiths S.K., Sandia National Laboratories, US

Hierarchical nanoporous materials afford the opportunity to combine the high surface area and functionality of nanopores with the superior charge/discharge characteristics of wider transport channels. In the present paper we optimize the apertures and spacing [...]

Methods for the Prediction of Nanoparticle Fate, Transport and Receptor Exposure in an Aqueous Environment

Mackay C.E., Gray M.N., Reinert K., Sellers K., AMEC, US

The development and applications of nanomaterials have presented a unique problem to environmental scientists and risk assessors. Until now, the models and paradigms used to predict the behavior of chemicals in the environment and thereby [...]

Simulation of Electrokinetic Flow and Analyte Transport in Nano Channels

Feng J.J., Krishnamoorthy S., Wang G.W., Sundaram S., CFD Research Corporation, US

This paper demonstrates the electrokinetic flow and transport of charged and neutral analytes in nanochannels by solving full system of governing Poisson-Nernst-Planck equations without any assumptions. The issues related to the spatial and time scales [...]

Transport of Multiple Enzymes through Semipermeable Membrane and Effect of Surfactants

Trigo C., Leung S.W., Bhushan A., Daniels C.K., Lai J.C.K., Idaho State University, College of Engineering, US

Surfactants are known to influence functions of many proteins in membranes, cells and tissues. Because most studies to elucidate the effects of surfactants on membrane-bound proteins and cells employed heterogeneous or complex systems, it is [...]

Monte Carlo Simulation of Transport in Two-Dimensional Electron Gas via Energy Relaxation

Zhao X., Nabet B., Drexel University, US

We simulate the process of energy relaxation in two-dimensional-electron-gas (2DEG) via electron-electron (e-e) scattering by Monte Carlo method. Results indicate a sub-picosecond energy relaxation response time to external perturbation. We suggest that carriers are subjected [...]

Differential Effects of Surfactants on Enzyme Activity and Transport across a Semipermeable Cell

Leung S.W., Lai J.C.K., Idaho State University, US

Differential Effects of Surfactants on Enzyme Activity and Transport across a Semipermeable Cell Solomon Leung1 and James C.K. Lai2 1 Corresponding Author, College of Engineering, P.O. Box 8060, Idaho State University, Pocatello, ID 83209 Fax: [...]

Nanoelectronic Devices Constructed Using Individual Vertically Aligned Carbon Nanofibers

Yang X., Austin D.W., Guillorn M.A., Merkulov V.I., Melechko A.V, Lowndes D.H., Simpson M.L., Oak Ridge National Laboratory, US

We are fabricating active nanoscale electronic devices based on Vertically Aligned Carbon Nanofibers (VACNF). VACNFs are synthesized in a high-density Plasma-Enhanced Chemical Vapor Deposition (PECVD) process that provides a high degree of control of the [...]