Article (Scientific journals)
Sum-frequency generation spectroscopy of DNA monolayers
Sartenaer, Yannick; Tourillon, Gérard; Dreesen, Laurent et al.
2007In Biosensors and Bioelectronics, 22, p. 2179-2183
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Abstract :
[en] The anchoring of thiolated single-strandedDNA(HS-ssDNA) monolayers onto platinum substrates was investigated by sum-frequency generation spectroscopy. Different buffer solutions were used for the preparation of the adlayers. Vibrational fingerprints in the 2700–3100 cm−1 spectral range showed the intercalation of Tris/EDTA (TE) buffer molecules within the HS-ssDNA self-assembled monolayer. Buffer contribution to SFG can be quenched either by using SFG inactive molecules like KH2PO4/K2HPO4/NaCl (PBS) or by repeated rinsing of the DNA layer with pure water. Comparing the SFG spectra of HS-ssDNA and mercaptohexanol (MCH), which had been self-assembled onto the same substrate, enabled us to infer ordering of the anchor arms and strong disordering of the DNA strands of HS-ssDNA monolayers self-assembled on platinum.
Disciplines :
Physics
Author, co-author :
Sartenaer, Yannick
Tourillon, Gérard
Dreesen, Laurent ;  Université de Liège - ULiège > Département de physique > Biophotonique
Lis, Dan
Mani, Alaa A.
Thiry, Paul A.
Peremans, André
Language :
English
Title :
Sum-frequency generation spectroscopy of DNA monolayers
Publication date :
2007
Journal title :
Biosensors and Bioelectronics
ISSN :
0956-5663
eISSN :
1873-4235
Publisher :
Elsevier, Oxford, United Kingdom
Volume :
22
Pages :
2179-2183
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 26 October 2009

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