nanochannel – TechConnect Briefs

Investigation of the Concentration Polarization effect on Nanoparticles using radial micro-nanofluidic devices

Aïzel K., Fouillet Y., Pudda C., Chabrol C., Texier-Nogues I., CEA-LETI, FR

We perform ICP using radial silicon nanojunction geometries fabricated by single standard silicon microfabrication for proof of concept concentration operation over 50nm polystyrene nanobeads.We call the devices “Ring like devices” because of the circular shape [...]

Evanescent wave-based particle tracking technique for velocity distribution in extended nanochannel

Kazoe Y., Iseki K., Mawatari K., Kitamori T., The University of Tokyo, JP

We developed a flow measurement technique of velocity distribution in extended nanochannel (10- 1000 nm), using fluorescent tracer nanoparticles and the evanescent wave which penetrates into a liquid medium with an exponential decay from the [...]

Capillary Electrophoresis in Nanofluidic Channels

Atzberger P.J., Gibou F., Pennathur S., university of california, santa barbara, US

Electrophoretic separation in nanofluidic channels exhibits significant differences with microfluidics. We discuss a theoretical / experimental collaboration investigating particle separation by electropohoresis in nanochannels. Recent experimental results in the laboratory of our collaborator Dr. Pennathur [...]

Novel Low Temperature Fabrication Method for Label-Free Electronic Sensing of Biomolecules in Nanofluidic Channels with Integrated Electrodes

Wynne T., Huang X.T., Pennathur S., university of california, santa barbara, US

In this work, we demonstrate a surface micromachined fabrication approach for integrated addressable metal electrodes within centimeter-long nanofluidic channels using a low-temperature, xenon diflouride dry-release method for novel biosensing applications. The main contribution of this [...]

Nanofluidic Channel Based Single Molecular Sensors in Polymer Substrate Fabricated by Novel Nanoimprinting Processes

Wu J., Chantiwas R., Soper S.C., Park S., Louisiana State University, US

One critical challenge in developing innovative nanochannel-based sensors for bio/chemical analyses is to build multiscale structures composed of narrow, long and continuous fluidic nanochannels and microfluidic networks at low cost. We presents a novel process [...]

Modulation Of Nanochannels Hydration In Lipid Cubic Phases Studied by SANS and SAXS

Angelov B., Angelova A., Angelova A., Garamus V., Lebas G., Funari S., Lesieur S., Ollivon M., Couvreur P., CNRS UMR8612, FR

The hydration of a bicontinuous lipid cubic phase, respectively the sizes of the aqueous nanochannels formed in such a supramolecular structure of hydrated monoolein, was modulated by incorporation of small nonionic guest molecule (octyl glucoside). [...]

Wall Functions for Incorporation of Atomistic Physics into Continuum Modeling of Electrokinetic Flow

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

The atomistic physics of fluid/solid interfacial layers may substantially influence liquid flow and ion transport, particularly in nanoscale channels. Previous studies addressing non-continuum fluid mechanics have been largely based on Molecular Dynamics (MD) simulations that [...]

Capillary filling speed in silicon dioxide nano-channels

Jarlgaard S.E., Mikkelsen M.B.L., Skafte-Pedersen P., Bruus H., Kristensen A., Technical University of Denmark, DK

We present a simple silicon-based fabrication technique for nanocapillaries based on controlled growth of silicon-dioxide, UV lithography, etching with etch-stop, and glass wafer bonding. Our approach improves state-of-the-art with respect to the obtained cross-wafer homogeneity [...]

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 [...]

Scaling of Electroosmotic Flow and Ionic Conductivity in Nanochannels

Qiao R., Aluru N.R., Beckman Institute for Advanced Science and Technology, US

Electrokinetic transport is widely encountered in many nanofluidic systems, and understanding its scaling as a function of various operating conditions, e.g., bulk concentration, is important for establishing design rules and for exploring the design space. [...]