| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Comparative Study on Polarization of DNA and CdSe Quantum Dots |
| ZHOU Xing-Fei, CUI Cheng-Yi, ZHANG Jin-Hai, LIU Jian-Hua, LIU Jing-Song |
| Department of Physics, Ningbo University, Ningbo 315211 |
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| Cite this article: |
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ZHOU Xing-Fei, CUI Cheng-Yi, ZHANG Jin-Hai et al 2010 Chin. Phys. Lett. 27 038703 |
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Abstract The polarizabilities of DNA in transverse direction and CdSe semiconductor quantum dots (QDs) deposited on mica surface are compared by means of electrostatic force microscopy (EFM). We observe clear EFM-phase shift over CdSe QDs, while no obvious signal on DNA is detected, suggesting that DNA molecules is an electrical insulator.
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| Keywords:
87.15.Pc
87.80.Nj
73.63.Kv
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Received: 30 March 2009
Published: 09 March 2010
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