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Titolo:
Electrochemical, spectroscopic and SPM evidence for the controlled formation of self-assembled monolayers and organised multilayers of ferrocenyl alkyl thiols on Au(111)
Autore:
Viana, AS; Abrantes, LM; Jin, G; Floate, S; Nichols, RJ; Kalaji, M;
Indirizzi:
Univ Wales Bangor, Dept Chem, Bangor LL57 2UW, Gwynedd, Wales Univ Wales Bangor Bangor Gwynedd Wales LL57 2UW LL57 2UW, Gwynedd, Wales Univ Lisbon, Fac Ciencias, Dept Quim & Bioquim, CECUL, P-1700 Lisbon, Portugal Univ Lisbon Lisbon Portugal P-1700 oquim, CECUL, P-1700 Lisbon, Portugal Chinese Acad Sci, Inst Mech, Lab Laser Res, Beijing 100080, Peoples R China Chinese Acad Sci Beijing Peoples R China 100080 100080, Peoples R China Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England Univ Liverpool Liverpool Merseyside England L69 7ZD , Merseyside, England
Titolo Testata:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
fascicolo: 16, volume: 3, anno: 2001,
pagine: 3411 - 3419
SICI:
1463-9076(2001)3:16<3411:ESASEF>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCANNING-TUNNELING-MICROSCOPY; GOLD; ADSORPTION; ELECTRODES; SURFACES; ALKANETHIOLS; ELLIPSOMETRY; VOLTAMMETRY; GOLD(111); FILMS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Kalaji, M Univ Wales Bangor, Dept Chem, Bangor LL57 2UW, Gwynedd, Wales Univ Wales Bangor Bangor Gwynedd Wales LL57 2UW Gwynedd, Wales
Citazione:
A.S. Viana et al., "Electrochemical, spectroscopic and SPM evidence for the controlled formation of self-assembled monolayers and organised multilayers of ferrocenyl alkyl thiols on Au(111)", PHYS CHEM P, 3(16), 2001, pp. 3411-3419

Abstract

Organised multilayers were formed from the controlled self-assembly of ferrocene alkyl thiols on Au(111) surfaces. The control was accomplished by increasing the concentration of the thiol solutions used for the assembly. Cyclic voltammetry, ellipsometry, scanning probe microscopy (STM and AFM) andin situ FTIR spectroscopy were used to probe the differences between mono-and multilayers of the same compounds. Electrochemical desorption studies confirmed that the multilayer structure is attached to the surface via one monolayer. The electrochemical behaviour of the multilayers indicated the presence of more than one controlling factor during the oxidation step, whereas the reduction was kinetically controlled which contrasts with the behaviour of monolayers, which exhibit kinetic control for the oxidation and reduction steps. Conventional and imaging ellipsometry confirmed that multilayers with well-defined increments in thickness could be produced. However, STM indicated that at the monolayer stage, the thiols used promote the mobility of Au atoms on the surface. It is very likely that the multilayer structure is held together through hydrogen bonding. To the best of out knowledge, this is the first example of a controlled one-step growth of multilayersof ferrocenyl alkyl thiols using self-assembly techniques.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 04:15:34