Effects of spatial gradients of electrical conductivity on chip-based sample injection processes

2004 ◽  
Vol 518 (1-2) ◽  
pp. 59-68 ◽  
Author(s):  
Carolyn L. Ren ◽  
Dongqing Li
Keyword(s):  
Electrical Conductivity ◽  
Sample Injection ◽  
Spatial Gradients ◽  
On Chip

scholarly journals Laser-patterned stem-cell bridges in a cardiac muscle model for on-chip electrical conductivity analyses

Lab on a Chip ◽  
2012 ◽  
Vol 12 (3) ◽  
pp. 566-573 ◽  
Author(s):  
Zhen Ma ◽  
Qiuying Liu ◽  
Honghai Liu ◽  
Huaxiao Yang ◽  
Julie X. Yun ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Stem Cell ◽  
Cardiac Muscle ◽  
Muscle Model ◽  
On Chip

Pressure-Driven Sample Injection with Quantitative Liquid Dispensing for On-Chip Electrophoresis

2004 ◽  
Vol 20 (3) ◽  
pp. 483-487 ◽  
Author(s):  
Nae Yoon LEE ◽  
Masumi YAMADA ◽  
Minoru SEKI
Keyword(s):  
Sample Injection ◽  
On Chip ◽  
Pressure Driven

On the A.C. electrical conductivity of a Lorentz gas

1968 ◽  
Vol 2 (1) ◽  
pp. 1-8 ◽  
Author(s):  
J. H. M. Fu ◽  
R. S. B. Ong
Keyword(s):  
Electrical Conductivity ◽  
Magnitude Estimate ◽  
Lorentz Gas ◽  
Collision Term ◽  
Homogeneous Case ◽  
Spatial Gradients ◽  
Effective Collision Frequency ◽  
Higher Order Terms ◽  
Order Of Magnitude ◽  
Effective Collision

Often one is interested in the electrical conductivity of a plasma for frequencies of the applied electric field comparable to or greater than the effective collision frequency. For the purpose of obtaining an order of magnitude estimate of the conductivity a Lorentz gas model with a Fokker–Planck collision term is used. For this simple model a formula for the a.c. electrical conductivity for two limiting cases is derived in closed form. The first term of the expression for the conductivity in the case where w/k is very large agrees with that obtained by Bernstein & Trehan (1960) for the spatially homogeneous case, while the effect of the spatial gradients is indicated in the higher order terms. In the case where w and k are both equal to zero the expression for the d.c. electrical conductivity of Spitzer (1962) is recovered.

scholarly journals Electrodes for Microfluidic Integrated Optoelectronic Tweezers

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Kuo-Wei Huang ◽  
Sabbir Sattar ◽  
Jiang F. Zhong ◽  
Cheng-Hsu Chou ◽  
Hsiung-Kuang Tsai ◽  
...  
Keyword(s):  
Thin Film ◽  
Electrical Conductivity ◽  
Small Deformation ◽  
Oxygen Plasma Treatment ◽  
Electrically Conductive ◽  
Single Walled Carbon Nanotube ◽  
Optoelectronic Tweezers ◽  
Biochemical Analyses ◽  
On Chip ◽  
First Time

We report on two types of electrodes that enable the integration of optoelectronic tweezers (OETs) with multilayer poly(dimethylsilane)- (PDMS-) based microfluidic devices. Both types of electrodes, Au-mesh and single-walled carbon nanotube- (SWNT-) embedded PDMS thin film, are optically transparent, electrically conductive, and can be mechanically deformed and provide interfaces to form strong covalent bonding between an OET device and PDMS through standard oxygen plasma treatment. Au-mesh electrodes provide high electrical conductivity and high transparency but are lack of flexibility and allow only small deformation. On the other hand, SWNT-embedded PDMS thin film electrodes provide not only electrical conductivity but also optical transparency and can undergo large mechanical deformation repeatedly without failure. This enables, for the first time, microfluidic integrated OET with on-chip valve and pump functions, which is a critical step for OET-based platforms to conduct more complex and multistep biological and biochemical analyses.

Hand-held syringe as a portable plastic pump for on-chip continuous-flow PCR: miniaturization of sample injection device

The Analyst ◽  
2012 ◽  
Vol 137 (4) ◽  
pp. 983-990 ◽  
Author(s):  
Wenming Wu ◽  
Kieu The Loan Trinh ◽  
Nae Yoon Lee
Keyword(s):  
Continuous Flow ◽  
Injection Device ◽  
Sample Injection ◽  
On Chip

scholarly journals Development of an on-chip sample injection system with a 6-port valve incorporated in a microchip

RSC Advances ◽  
2020 ◽  
Vol 10 (59) ◽  
pp. 35848-35855
Author(s):  
Kazuhiro Morioka ◽  
Hina Sato ◽  
Kenji Morita ◽  
Hemmi Akihide ◽  
Hizuru Nakajima ◽  
...  
Keyword(s):  
Injection System ◽  
Sample Injection ◽  
Chip Sample ◽  
On Chip

We demonstrate on-chip sample injection using a 6-port valve incorporated in a microchip.

On-chip definition of picolitre sample injection plugs for miniaturised liquid chromatography

2001 ◽  
Vol 924 (1-2) ◽  
pp. 259-263 ◽  
Author(s):  
Alan P. O’Neill ◽  
Peter O’Brien ◽  
John Alderman ◽  
Daniel Hoffman ◽  
Máiréad McEnery ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Sample Injection ◽  
On Chip ◽  
Definition Of
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