Characterization of the geometry of negative dielectrophoresis traps for particle immobilization in digital microfluidic platforms

Lab on a Chip ◽  
2013 ◽  
Vol 13 (9) ◽  
pp. 1823 ◽  
Author(s):  
H. Rezaei Nejad ◽  
Ovee Z. Chowdhury ◽  
Matthew D. Buat ◽  
Mina Hoorfar
Keyword(s):  
Microfluidic Platforms ◽  
Digital Microfluidic

Dimensional and Locational Integrity in the Replication of Polymeric Microdevices

2007 ◽  
Author(s):  
Byoung Hee You ◽  
Daniel S. Park ◽  
Ping-Chuan Chen ◽  
Wilfredo M. Caceres ◽  
Dimitris E. Nikitopoulos ◽  
...  
Keyword(s):  
Linear Thermal Expansion ◽  
Hot Embossing ◽  
Microtiter Plate ◽  
Microfluidic Platforms ◽  
Molding Process ◽  
Thermal Expansion Coefficients ◽  
Molded Parts ◽  
Expansion Coefficients ◽  
Geometric Variation

In molding, geometric variation of molded parts is inevitable since the parts have a thermal history, including expansion and shrinkage, during the molding process. Shrinkage induces variation between the designed dimensions and locations of features on molded parts while the parts are cooled. Characterization of the variation is necessary to ensure dimensional and location integrity. Hot embossing and injection molding were performed in order to assess variation. Measurements were made using a Measurescope (MM-22, Nikon Corp., Kawasaki, Japan). The measured locations and dimensions were compared to estimates obtained using a simple model based on the linear thermal expansion coefficients (CTE) of the molded materials. The measured and the estimated shrinkage from hot embossing were incorporated in the fabrication of microtiter plate-based polymer microfluidic platforms.

Additively Manufactured Digital Microfluidic Platforms for Ion-Selective Sensing

ACS Sensors ◽  
2019 ◽  
Vol 4 (4) ◽  
pp. 918-923 ◽  
Author(s):  
Xin Min ◽  
Chao Bao ◽  
Woo Soo Kim
Keyword(s):  
Microfluidic Platforms ◽  
Digital Microfluidic

Nonlinear Localization for Electrowetting-Based Digital Microfluidic Actuation

2010 ◽  
Author(s):  
Milad Abolhasani ◽  
Kurt D. Devlin ◽  
Homayoun Najjaran ◽  
Mina Hoorfar ◽  
Jonathan F. Holzman
Keyword(s):  
Threshold Voltage ◽  
Large Scale ◽  
Threshold Effects ◽  
Experimental Characterization ◽  
Droplet Motion ◽  
Nonlinear Localization ◽  
Simultaneous Use ◽  
Digital Microfluidic ◽  
Voltage Activation

The method described in this paper introduces a new multiplexing format for cross-referencing of DMF systems through the simultaneous use of threshold-based voltage actuation (which sets a minimum voltage to initiate droplet motion) and bi-polar voltage activation on the overlying and underlying electrodes. The design makes use of bi-polar voltage activation and threshold effects to eliminate inter-droplet interference and overcome addressability limitations. In the proposed DMF multiplexer structure, these two requirements must both be satisfied for 2-D multiplexed addressability. Experimental characterization of the threshold voltage associated with the first requirement is presented. With regard to requirement two, the bi-polar voltage activation scheme is applied to a fabricated DMF multiplexer, and independent microdroplet motion is shown. The technique can be applied in actuating isolated microdroplets or microdroplet groups (simultaneously) in large-scale/highly-parallel DMF devices.

scholarly journals Design, fabrication and characterization of electrostatic micro actuators for microfluidic platforms

2011 ◽  
Vol 25 ◽  
pp. 1181-1184 ◽  
Author(s):  
M. Patrascu ◽  
J. Gonzalo-Ruiz ◽  
M. Goedbloed ◽  
M. Crego-Calama ◽  
S.H. Brongersma
Keyword(s):  
Microfluidic Platforms ◽  
Micro Actuators ◽  
Fabrication And Characterization

scholarly journals A review of digital microfluidics as portable platforms for lab-on a-chip applications

Lab on a Chip ◽  
2016 ◽  
Vol 16 (13) ◽  
pp. 2376-2396 ◽  
Author(s):  
Ehsan Samiei ◽  
Maryam Tabrizian ◽  
Mina Hoorfar
Keyword(s):  
Digital Microfluidics ◽  
Lab On A Chip ◽  
Microfluidic Platforms ◽  
Digital Microfluidic

This review evaluates the possibility of developing portable digital microfluidic platforms for lab-on-a-chip applications.

In situ characterization of microdroplet interfacial properties in digital microfluidic systems

Lab on a Chip ◽  
2010 ◽  
Vol 10 (11) ◽  
pp. 1429 ◽  
Author(s):  
Ali Ahmadi ◽  
Kurt D. Devlin ◽  
Homayoun Najjaran ◽  
Jonathan F. Holzman ◽  
Mina Hoorfar
Keyword(s):  
Interfacial Properties ◽  
Microfluidic Systems ◽  
In Situ Characterization ◽  
Digital Microfluidic

Feedback control system for large scale 2D digital microfluidic platforms

2018 ◽  
Vol 255 ◽  
pp. 3616-3622 ◽  
Author(s):  
Chunqiao Li ◽  
Kaidi Zhang ◽  
Xubo Wang ◽  
Jian Zhang ◽  
Hong Liu ◽  
...  
Keyword(s):  
Control System ◽  
Feedback Control ◽  
Large Scale ◽  
Feedback Control System ◽  
Microfluidic Platforms ◽  
Digital Microfluidic

Characterization of high index microsphere resonators in fiber-integrated microfluidic platforms

2011 ◽  
Author(s):  
Oleksiy Svitelskiy ◽  
Dongning Sun ◽  
Arash Darafsheh ◽  
Mikhail Sumetsky ◽  
Anatoly Lupu ◽  
...  
Keyword(s):  
High Index ◽  
Microfluidic Platforms
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