Flexoelectric origin of nanomechanic deflection in DNA-microcantilever system.
The membrane theory is used to study the recently observed nanomechanical bending of cantilevers, which have processed biomolecular adsorption or biochemical reactions. To be different from entropy-controlling bending mechanism discussed before, we propose that the flexoelectric effect induces cantilever bending. With the introduction of flexoelectric spontaneous curvature, the relation between the bending and biopolymer character is constructed by a simple analytical formula. The cantilever motion induced by adsorption of single-strand DNA and DNA hybridization reaction is quantified analytically and our results show good agreement with experiments.
Liu
Fei
F
Institute of Theoretical Physics, The Chinese Academy of Sciences, P.O. Box 2735, 100080, Beijing, People's Republic of China. liufei@itp.ac.cn
Zhang
Yong
Y
Ou-Yang
Zhong can
Zc
D000327:Adsorption; D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods*; D003198:Computer Simulation; D004247:DNA / Q000032:analysis* / Q000737:chemistry*; D015342:DNA Probes / Q000032:analysis / Q000737:chemistry; D004277:DNA, Single-Stranded / Q000032:analysis / Q000737:chemistry; D004548:Elasticity; D019544:Equipment Failure Analysis; D008567:Membranes, Artificial; D008956:Models, Chemical; D009038:Motion; D036103:Nanotechnology / Q000379:methods*; D013314:Stress, Mechanical
D015342:DNA Probes; D004277:DNA, Single-Stranded; D008567:Membranes, Artificial; D004247:DNA