Experimental investigation of evanescence-based infrared biodetection technique for micro-total-analysis systems

2009 ◽  
Vol 14 (5) ◽  
pp. 054050 ◽  
Author(s):  
Arvind Chandrasekaran ◽  
Muthukumaran Packirisamy
Keyword(s):  
Experimental Investigation ◽  
Micro Total Analysis Systems ◽  
Total Analysis

Experimental Investigation of High-Resolution Injection Technique in Microfluidic Chips

2006 ◽  
Vol 505-507 ◽  
pp. 409-414
Author(s):  
Yao Nan Wang ◽  
Chiufeng Lin ◽  
S.T. Wu ◽  
C.L. Chang ◽  
H.T. Chen ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
High Resolution ◽  
Injection System ◽  
Injection Technique ◽  
Microfluidic Chips ◽  
High Quality ◽  
Exciting Potential ◽  
Micro Total Analysis Systems ◽  
Injection Techniques ◽  
Total Analysis

This paper presents an experimental investigation on the use of high-resolution injection techniques to deliver sample plugs within electrophoresis microchips. Two novel injection microfluidic chips are proposed, which employ conventional cross-shaped and U-shaped injection system combined with an expander to deliver high-quality sample plugs for detection in separation channel. The valving characteristics on microfluidic devices are controlled through appropriate manipulations of the electric potential strengths during the sample injection and separation steps. These novel injection techniques developed in this study has an exciting potential for use in high-quality, high-throughput chemical analysis applications and in many other applications throughout the field of micro-total-analysis systems.

scholarly journals Glass based Micro Total Analysis Systems: Materials, Fabrication methods, and Applications

2021 ◽  
pp. 129859
Author(s):  
Tao Tang ◽  
Yapeng Yuan ◽  
Yaxiaer Yalikun ◽  
Yochiroh Hosokawa ◽  
Ming Li ◽  
...  
Keyword(s):  
Micro Total Analysis Systems ◽  
Total Analysis

Three-Dimensional CFD Model of Pressure Drop in µTAS Devices in a Microchannel

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
Damena D. Agonafer ◽  
J. Yeom ◽  
M. A. Shannon
Keyword(s):  
Pressure Drop ◽  
Figure Of Merit ◽  
Flow Resistance ◽  
Three Dimensional ◽  
Design Rule ◽  
Dynamics Model ◽  
Enhance Heat Transfer ◽  
Micro Total Analysis Systems ◽  
Total Analysis ◽  
Adsorption Desorption

Microposts are utilized to enhance heat transfer, adsorption/desorption, and surface chemical reactions. In a previous study [Yeom et al., J. Micromech. Microeng., 19, p. 065025 (2009)], based in part on an experimental study, an analytical expression was developed to predict the pressure drop across a microchannel filled with arrays of posts with the goal of fabricating more efficient micro-total analysis systems (µTAS) devices for a given pumping power. In particular, a key figure of merit for the design of micropost-filled reactors, based on the flow resistance models was reported thus providing engineers with a design rule to develop efficient µTAS devices. The study did not include the effects of the walls bounding the microposts. In this paper, a three-dimensional computational fluid dynamics model is used to include the effects of three-dimensionality brought about by the walls of the µTAS devices that bound the microposted structures. In addition, posts of smaller size that could not be fabricated for the experiments were also included. It is found that the two- and three-dimensional effects depend on values of the aspect ratio and the blockage ratios. The Reynolds number considered in the experiment that ranged from 1 to 10 was extended to 300 to help determine the range of Re for which the FOM model is applicable.

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