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Title: Immobilization of DNA on 11-mercaptoundecanoic acid-modified gold(111) surface for atomic force microscopy imaging
Authors: Song, Yonghai
Li, Z ×
Liu, ZG
Wei, G
Wang, L
Sun, LL #
Issue Date: Oct-2005
Publisher: Wiley-liss
Series Title: Microscopy research and technique vol:68 issue:2 pages:59-64
Abstract: Immobilized DNA on preformed 11-mercaptoundecanoic acids (MUDA) self-assembled monolayers (SAMS) on a gold (111) surface was bound by a divalent cation bridges was imaged by atomic force microscopy (AFM). The DNA immobilization was attributed to the formation of ionic bridges between the carboxylate groups of MUDA and the phosphate groups of DNA. AFM images revealed that DNA molecules could be immobilized strongly enough to permit stable and reproducible imaging. The effect of different bridge cations, such as Mg2+, Zn2+ and Cu2+, and the pH of DNA assembled solution on immobilization and conformation of DNA was studied. Plasmid DNA pBR 322/Pst I molecules were straightened by using a molecular combing technique on the MUDA surface.
ISSN: 1059-910X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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