Thermally Controlled Bonding of Adenine to Cerium Oxide: Effect of Substrate Stoichiometry, Morphology, Composition, and Molecular Deposition Technique
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10371530" target="_blank" >RIV/00216208:11320/17:10371530 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/acs.jpcc.7b06925" target="_blank" >http://dx.doi.org/10.1021/acs.jpcc.7b06925</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpcc.7b06925" target="_blank" >10.1021/acs.jpcc.7b06925</a>
Alternative languages
Result language
angličtina
Original language name
Thermally Controlled Bonding of Adenine to Cerium Oxide: Effect of Substrate Stoichiometry, Morphology, Composition, and Molecular Deposition Technique
Original language description
The adsorption of adenine, one of the structural units of DNA and RNA, on nanostructured cerium oxide was studied using synchrotron radiation based techniques: photoelectron and X-ray absorption spectroscopies. Using a systematic approach, we studied this biomolecule's bonding to the inorganic surface and examined the effects of different stoichiometry, morphology and 'composition of cerium oxide films, as well as two methods of molecular deposition (evaporation in vacuum and deposition from aqueous solution). The adenine molecule chemisorbs on the stoichiometric (IV) cerium oxide intact via nitrogen atoms, independent of the oxide morphology and deposition technique. Annealing of the adenine adlayer at 250 degrees C causes CeO2 surface partial reduction, along with the partial deprotonation of the nitrogen. The reaction of adenine with ex situ prepared CeO2 films (nanostructured compact and porous) activates Ce4+ cation reduction not only on the surface but also in the subsurface layers accompanied by water desorption. The adenine molecule was found to oxidize and decompose on a reduced surface of the cerium oxide, and for a higher degree of oxide reduction, the temperature of decomposition is lower. The concentration of oxygen vacancies on the surface determines the degree of adenine stability on cerium oxide.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physical Chemistry C
ISSN
1932-7447
e-ISSN
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Volume of the periodical
121
Issue of the periodical within the volume
45
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
25118-25131
UT code for WoS article
000416202900024
EID of the result in the Scopus database
2-s2.0-85034670193