Generic fabriction technology for transparent and suspended microfluidic and nanofluidic channels

2005 ◽  
Author(s):  
T.S. Hug ◽  
T. Biss ◽  
N.F. de Rooij ◽  
U. Staufer
Keyword(s):  
Nanofluidic Channels

Lamellar Porous Vermiculite Membranes for Boosting Nanofluidic Osmotic Energy Conversion

2021 ◽  
Author(s):  
Li Cao ◽  
Hong Wu ◽  
Chunyang Fan ◽  
Zhiming Zhang ◽  
Benbing Shi ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Power Density ◽  
Great Promise ◽  
Two Dimensional ◽  
Nanofluidic Channels ◽  
Salinity Gradients ◽  
Transmembrane Resistance

Lamellar membranes with two-dimensional nanofluidic channels hold great promise in harvesting osmotic energy from salinity gradients. However, the power density is often limited by the high transmembrane resistance primarily caused...

scholarly journals Water friction in nanofluidic channels made from two-dimensional crystals

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ashok Keerthi ◽  
Solleti Goutham ◽  
Yi You ◽  
Pawin Iamprasertkun ◽  
Robert A. W. Dryfe ◽  
...  
Keyword(s):  
Hexagonal Boron Nitride ◽  
Slip Length ◽  
Two Dimensional ◽  
Water Flows ◽  
Nanofluidic Channels ◽  
Molecular Separation ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Biological Channels ◽  
Atomically Flat

AbstractMembrane-based applications such as osmotic power generation, desalination and molecular separation would benefit from decreasing water friction in nanoscale channels. However, mechanisms that allow fast water flows are not fully understood yet. Here we report angstrom-scale capillaries made from atomically flat crystals and study the effect of confining walls’ material on water friction. A massive difference is observed between channels made from isostructural graphite and hexagonal boron nitride, which is attributed to different electrostatic and chemical interactions at the solid-liquid interface. Using precision microgravimetry and ion streaming measurements, we evaluate the slip length, a measure of water friction, and investigate its possible links with electrical conductivity, wettability, surface charge and polarity of the confining walls. We also show that water friction can be controlled using hybrid capillaries with different slip lengths at opposing walls. The reported advances extend nanofluidics’ toolkit for designing smart membranes and mimicking manifold machinery of biological channels.

Fabrication of size-controllable nanofluidic channels using angled physical vapor deposition

2012 ◽  
Vol 98 ◽  
pp. 647-650 ◽  
Author(s):  
Xiaojun Li ◽  
Xudi Wang ◽  
Xin Li ◽  
Jian Jin ◽  
Hui You ◽  
...  
Keyword(s):  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Nanofluidic Channels

1-D modeling of ion transport in rectangular nanofluidic channels

2012 ◽  
Vol 258 (6) ◽  
pp. 2157-2160 ◽  
Author(s):  
Liu Kun ◽  
Ba Dechun ◽  
Gu Xiaoguang ◽  
Du Guangyu ◽  
Lin Zeng ◽  
...  
Keyword(s):  
Ion Transport ◽  
Nanofluidic Channels

Ion-size effect on electrokinetic energy conversion in nanofluidic channels

2016 ◽  
Vol 13 (10) ◽  
pp. 1050-1058 ◽  
Author(s):  
Hung-Chun Yeh ◽  
Chih-Chang Chang ◽  
Ruey-Jen Yang
Keyword(s):  
Size Effect ◽  
Energy Conversion ◽  
Nanofluidic Channels ◽  
Ion Size

Effect of Time Dependent Excitation Signals on Gating in Nanofluidic Channels

2015 ◽  
Author(s):  
C. Boone ◽  
M. Fuest ◽  
K. Wellmerling ◽  
S. Prakash
Keyword(s):  
Electric Field ◽  
Ionic Transport ◽  
Local Variation ◽  
Time Dependent ◽  
Local Perturbation ◽  
Gate Electrode ◽  
Nanofluidic Channels ◽  
Field Effect Devices ◽  
Dc Excitation ◽  
Dependent Signal

Nanofluidic field effect devices feature a gate electrode embedded in the nanochannel wall. The gate electrode creates local variation in the electric field allowing active, tunable control of ionic transport. Tunable control over ionic transport through nanofluidic networks is essential for applications including artificial ion channels, ion pumps, ion separation, and biosensing. Using DC excitation at the gate, experiments have demonstrated multiple current states in the nanochannel, including the ability to switch off the measured current; however, experimental evaluation of transient signals at the gate electrode has not been explored. Modeling results have shown ion transport at the nanoscale has known time scales for diffusion, electromigration, and convection. This supports the evidence detailed here that use of a time-dependent signal to create local perturbation in the electric field can be used for systematic manipulation of ionic transport in nanochannels. In this report, sinusoidal waveforms of various frequencies were compared against DC excitation on the gate electrode. The ionic transport was quantified by measuring the current through the nanochannels as a function of applied axial and gate potentials. It was found that time varying signals have a higher degree of modulation than a VRMS matched DC signal.

scholarly journals Analyte preconcentration in nanofluidic channels with nonuniform zeta potential

2017 ◽  
Vol 2 (12) ◽  
Author(s):  
A. Eden ◽  
C. McCallum ◽  
B. D. Storey ◽  
S. Pennathur ◽  
C. D. Meinhart
Keyword(s):  
Zeta Potential ◽  
Nanofluidic Channels ◽  
Analyte Preconcentration
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