Electrically transmissive alkyne-anchored monolayers on gold

Herrer, L (Universidad de Zaragoza) ; Gonzalez-Orive, A ; Marques-Gonzalez, S ; Martin, S (Universidad de Zaragoza) ; Nichols, R.J ; Serrano, J.L (Universidad de Zaragoza) ; Low, P.J ; Cea, P. (Universidad de Zaragoza)

Resumen: Well-ordered, tightly-packed (surface coverage 0.97 x 10(-9) mol cm(-2)) monolayer films of 1, 4-bis((4-ethynylphenyl)ethynyl)benzene (1) on gold are prepared via a simple self-assembly process, taking advantage of the ready formation of alkynyl C-Au sigma-bonds. Electrochemical measurements using [Ru(NH3)(6)](3+), [Fe(CN)(6)](3-), and ferrocenylmethanol [Fe((5)-C5H4CH2OH)((5)-C5H5)] redox probes indicate that the alkynyl C-Au contacted monolayer of 1 presents a relatively low barrier for electron transfer. This contrasts with monolayer films on gold of other oligo(phenylene ethynylene) derivatives of comparable length and surface coverage, but with different contacting groups. Additionally, a low voltage transition (V-trans = 0.51 V) from direct tunneling (rectangular barrier) to field emission (triangular barrier) is observed. This low transition voltage points to a low tunneling barrier, which is consistent with the facile electron transport observed through the C-Au contacted self-assembled monolayer of 1.

Idioma: Inglés

DOI: 10.1039/c8nr10464f

Año: 2019

Publicado en: Nanoscale 11, 16 (2019), 7976-7985
ISSN: 2040-3364

Factor impacto JCR: 6.895 (2019)

Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 50 / 314 = 0.159 (2019) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 25 / 103 = 0.243 (2019) - Q1 - T1
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 28 / 176 = 0.159 (2019) - Q1 - T1
Categ. JCR: PHYSICS, APPLIED rank: 23 / 154 = 0.149 (2019) - Q1 - T1

Factor impacto SCIMAGO: 2.18 - Nanoscience and Nanotechnology (Q1) - Materials Science (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E31-17R
Financiación: info:eu-repo/grantAgreement/ES/DGA/E47-17R
Financiación: info:eu-repo/grantAgreement/EC/FP7/607602/EU/Hierarchical Self Assembly of Polymeric Soft Systems/SASSYPOL
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2016-78257-R

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Química Orgánica (Dpto. Química Orgánica)
Área (Departamento): Área Química Física (Dpto. Química Física)