Please use this identifier to cite or link to this item:
Title: Ferrofluid plug as valve and actuator for whole-cell PCR on chip
Authors: Lok, Khoi Seng
Kwok, Yien Chian
Lee, Peter Peng Foo
Nguyen, Nam-Trung
Keywords: DRNTU::Engineering::Mechanical engineering
Issue Date: 2012
Source: Lok, K. S., Kwok, Y. C., Lee, P. P. F., & Nguyen, N. T. (2012). Ferrofluid plug as valve and actuator for whole-cell PCR on chip. Sensors and Actuators B: Chemical, 166-167, (893–897).
Series/Report no.: Sensors and actuators B: chemical
Abstract: Ferrofluid plug was first used as valve and actuator to circumvent the evaporation of aqueous fluid in LOC. Moreover, this dynamic plug catered for aqueous fluid expansion during its heating in the microchannel. Whole-cell polymerase chain reaction (PCR) protocol was successfully implemented in a magnetically actuated closed-loop PCR microchip system. Here, the ferrofluid plug was used to reduce the evaporation of the PCR sample in the thermal lysis step. A whole-cell PCR model was used to demonstrate this concept. The DNA plasmid, pUC19, was transformed into DH5α competent cells. Primer pairs were designed to amplify region of interest in pUC19. The transformants were cultured and selected. Whole-cell PCR was performed on intact bacteria to screen for the presence of pUC19, containing the region of interests. Serial dilutions demonstrated the limit of detection for this system to be four bacterial cells. PCR amplifications were verified with regular thermocyclers and results were comparable.
DOI: 10.1016/j.snb.2012.03.001
Rights: © 2012 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Sensors and Actuators B: Chemical, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI:]
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

Files in This Item:
File Description SizeFormat 
Ferrofluid plug.pdf346.57 kBAdobe PDFThumbnail

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.