Please use this identifier to cite or link to this item: https://doi.org/10.1021/la9033468
Title: Detection and quantification of DNA adsorbed on solid surfaces by using liquid crystals
Authors: Chen, C.-H. 
Yang, K.-L. 
Issue Date: 2-Feb-2010
Source: Chen, C.-H., Yang, K.-L. (2010-02-02). Detection and quantification of DNA adsorbed on solid surfaces by using liquid crystals. Langmuir 26 (3) : 1427-1430. ScholarBank@NUS Repository. https://doi.org/10.1021/la9033468
Abstract: Conventional DNA detection is often accomplished by using UV-vis or fluorescence spectrometry, which requires at least 1 μL of DNA solution. Herein, we report a label-free, liquid-crystal (LC)-based DNA quantification method that is suitable for characterizing DNA solution volumes of < 1 μL. The detection principle of this method is based on the disruption of the orientations of LCs by surface-immobilized DNA, which leads to distinct optical textures of LCs visible to the naked eye. However, this method is successful only when the buffer contains divalent cations such as calcium or magnesium. The limit of detection of this method is approximately 4 μg/mL DNA, and only 10 nL of DNA solution is required, which means that as little as 40 pg of DNA can be detected by using this method. This LC-based detection method is also simple to apply and has the potential to be integrated with lab-on-a-chip devices for DNA analysis. © 2009 American Chemical Society.
Source Title: Langmuir
URI: http://scholarbank.nus.edu.sg/handle/10635/63712
ISSN: 07437463
DOI: 10.1021/la9033468
Appears in Collections:Staff Publications

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