Probing of DNA and single-base mismatches by chemical force microscopy using peptide nucleic acid-modified sensing tips and functionalized surfaces

Langmuir

Volumn 17, Issue 17, 2001, Pages 5134-5136

  Lioubashevski, Oleg ^a   Patolsky, Fernando ^a   Willner, Itamar ^a  

^a HEBREW UNIVERSITY OF JERUSALEM   (Israel)

Author keywords

[No Author keywords available]

Indexed keywords

CHEMICAL FORCE MICROSCOPY;

ADHESION; ADSORPTION; DNA; ELECTROCHEMISTRY; MICROSCOPIC EXAMINATION; SURFACE CHEMISTRY;

FUNCTIONAL POLYMERS;

EID: 0035928916     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la0105174     Document Type: Article

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29. The Au-coated tips were functionalized with 1, 24 μg·mL, in 5 mM Tris-HCl buffer solution, pH = 7.4, for 12 h at room temperature. Cleaned Au-coated glass slides were modified with an ethanol solution of 1-mercaptoundecane, 1 mM, for 12 h. Hybridization was performed by the immersion of the 1-modified tip in 300 μL of 5 mM Tris-HCl bufibr solution, pH = 7.4, which included the respective concentration of 2, for a period of 1 h. Buffer solution containing DNA was placed on a glass slide. The 1-mercaptoundecane-functionalized Au-coated glass support was not interacted with the analyzed DNA sample in order to avoid nonspecific adsorption of the DNA (or any residual proteins) to the monolayer interface.
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