Distinct imaging of the nucleic acid bases on SrTiO3(100) surface by scanning tunneling microscopy
- 1 July 1995
- journal article
- research article
- Published by American Vacuum Society in Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures
- Vol. 13 (4) , 1411-1414
- https://doi.org/10.1116/1.588220
Abstract
Scanning tunneling microscopy (STM) imaging of four nucleic acid bases, adenine, guanine, thymine, and cytosine, has been performed on the surface of SrTiO3 single-crystal substrates. The images indicate that the bases are deposited as individual molecules in ultrahigh vacuum condition, and can be individually observed by STM. A comparison of the heights and lateral dimensions of the deposited species and also the bias dependence of the heights, enables differentiation between four nucleic acid bases in real space. (C) 1995 American Vacuum Society.Keywords
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