Stretching and migration of DNA by solvent elasticity in an oscillatory flow

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52979

Title:	Stretching and migration of DNA by solvent elasticity in an oscillatory flow
Authors:	Lo,WC;Hong,HC;Choi,HJ;Lai,PY;Chan,CK
Contributors:	物理學系
Keywords:	SHEAR-FLOW;POLYMER-SOLUTIONS;LONG DNA;ELECTROPHORESIS;RATCHETS
Date:	2011
Issue Date:	2012-06-11 10:52:50 (UTC+8)
Publisher:	國立中央大學
Abstract:	A model with solution viscoelasticity is proposed to explain the ratchetlike stretching of DNA by a symmetric ac electric field in polymer solutions. In this model, DNA is stretched by the interaction between the fluid elasticity and the oscillatory flow induced by DNA. Predictions of the model are confirmed by DNA stretching experiments performed in various polymer solutions and the corresponding rheological measurements of the solutions. In particular, experiments have verified that a net migration of stretched DNA in polymer solutions can be induced by a zero-mean asymmetric ac electric field. This last finding cannot be explained by other existing models.
Relation:	PHYSICAL REVIEW E
Appears in Collections:	[Department of Physics] journal & Dissertation

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