期刊
NANO LETTERS
卷 9, 期 4, 页码 1382-1385出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl803030e
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- Danish Research Council for Technology and Production (FTP) [274-050375]
We demonstrate a confinement spectroscopy technique capable of probing small conformational changes of unanchored single DNA molecules in a manner analogous to force spectroscopy, in the regime corresponding to femtonewton forces. In contrast to force spectroscopy, various structural forms of DNA can easily be probed, as indicated by experiments on linear and circular DNA. The extension of circular DNA is found to scale according to the de Gennes exponent, unlike for linear DNA.
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