Back to Search Start Over

DNA Separation Chips Using Asymmetrically-Switched Nonuniform Electric Fields

Authors :
Soyeon Yi
Young-Ho Cho
Source :
Transactions of the Korean Society of Mechanical Engineers A. 33:265-268
Publication Year :
2009
Publisher :
The Korean Society of Mechanical Engineers, 2009.

Abstract

We present the experimental study to realize a DNA separation chip using asymmetrically-switched nonuniform electric fields. The DNA separation chip redistributes DNA molecules within a specific area based on the size- and field-dependent nonlinearity of DNA drift velocity. The present chip is composed of a width variable channel to distribute nonuniform electric field, a DNA loading slit and a pair of electrodes to apply electric field. We focus on the design of DNA separation chips with identifying the nonlinearity of DNA drift velocity using three different DNA molecules (11.1kbp, 15.6kbp, and 48.5kbp) in the chips. It is demonstrated that different size of DNA shows different net migration in different direction under the asymmetrically-switched n onuniform electric field.기호설명 E 전기장 T 전기장 인가 주기 M DNA 분자의 크기 1. 서론 본 연구은 DNA 분리소자에 관한 것으로, 채널 내에 형성된 불균일한 전기장의 방향이 변함에 따라, DNA는 그 6cm크기에 따라 알짜이동 방향과 속도가 달라지게 된다. 본 논문에서는 이론적으로 제시된 바 있는 (1)이러한 래칫(ratchet) 효과를 실험적으로 검증하였다. 제안한 DNA분리소자(Fig. 1)에서는 비대칭 교차전기장(Fig. 2) 6mm미소유로을 양단에 인가하고 미소유로의 폭을 변화시켜 불균일 전기장을 형성하였다. 기존의 전기영동 소자

Details

ISSN :
12264873
Volume :
33
Database :
OpenAIRE
Journal :
Transactions of the Korean Society of Mechanical Engineers A
Accession number :
edsair.doi...........4202f47d1da3354dc2cbda67a2b195ed
Full Text :
https://doi.org/10.3795/ksme-a.2009.33.3.265