2008
DOI: 10.1021/jp8008207
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Interaction of Self-Assembled Monolayers of DNA with Electrons: HREELS and XPS Studies

Abstract: We present results from high-resolution electron energy loss spectroscopy (HREELS) and XPS studies of self-assembled monolayers of DNA. The monolayers are well-organized and display sharp vibrational peaks in the HREEL spectra. The electrons interact mainly with the backbone of the DNA. The XPS results indicate that, in most of the samples studied, the phosphates on the DNA are not charged.

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Cited by 79 publications
(109 citation statements)
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“…For the freshly deposited 5S-ds DNA film studied in Fig. 2, the maximum photoelectron yield of the N 1s manifold is observed at a binding energy (BE) of 399 eV, which, considering the possible multiple sites for nitrogen atoms within long DNA samples, is consistent with earlier XPS measurements of DNA SAM films (e.g., [17,18,21,30]). It is apparent from Fig.…”
Section: Resultssupporting
confidence: 87%
“…For the freshly deposited 5S-ds DNA film studied in Fig. 2, the maximum photoelectron yield of the N 1s manifold is observed at a binding energy (BE) of 399 eV, which, considering the possible multiple sites for nitrogen atoms within long DNA samples, is consistent with earlier XPS measurements of DNA SAM films (e.g., [17,18,21,30]). It is apparent from Fig.…”
Section: Resultssupporting
confidence: 87%
“…Dynamic contact angle measurements of ÀSCN terminated surfaces revealed an increase in contact angle upon formation of ÀSCN terminated surfaces, which is in good agreement with previously seen behaviour (Table 1) [30]. Ellipsometry of the ÀSCN terminated surfaces revealed a thickness of 1.2 nm AE 0.2 nm, which is comparable to the estimated thickness of the molecule (1.6 nm, Chem3D Software).…”
Section: Silicon Surface Preparation and Characterisationsupporting
confidence: 89%
“…The APTMS SAM (-NH 2 , Scheme 1, Step 1) surfaces were then treated with PDITC to form isothiocyanate terminated surfaces (-SCN, Scheme 1, Step 2) [30][31][32]. These surfaces were then coupled to the -NH 2 terminated photolabile hairpin oligonucleotide A to form the -OLIGO terminated surfaces (Scheme 1, Step 3).…”
Section: Silicon Surface Preparation and Characterisationmentioning
confidence: 99%
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