TY  - JOUR
A1  - Wróbel, Mateusz
A1  - Żaba, Tomasz
A1  - Sauter, Eric
A1  - Krawiec, Mariusz
A1  - Sobczuk, Joanna
A1  - Terfort, Andreas
A1  - Zharnikov, Michael
A1  - Cyganik, Piotr
T1  - Thermally stable and highly conductive SAMs on Ag substrate — the impact of the anchoring group
T2  - Advanced electronic materials
N2  - Self-assembled monolayers (SAMs) on metal substrates are an important part of modern interfacial chemistry and nanotechnology. The robustness of SAMs strongly depends on their thermal stability, which, together with electric conductivity, crucial for their applications in molecular/organic electronics. In this context, using a multidisciplinary approach, the structure, stability, and conductivity properties of conjugated aromatic SAMs featuring the naphthalene backbone and S, Se, or COO group, mediating bonding to the Ag substrate are addressed. Whereas thermal stability of these SAMs exhibits a strong dependence on anchoring group, their conductivity is similar, which is rationalized by tentative model considering redistribution of charge density along the molecular framework. The thermal stability of model naphthalenethiol SAM, emphasized by desorption energy of ≈1.69 eV, is better than that of typical N-heterocyclic carbene (NHC) monolayers considered currently as the most stable SAMs on metal substrates. However, in contrast to NHC SAMs, which are highly insulating, the naphtalene-based SAM, with S, Se or COO anchoring groups, are highly conductive, even in comparison with analogous oligophenyl SAMs (by a factor of 10). A unique combination of the ultimate thermal stability and superior conductivity for the naphthalenethiol SAM on Ag makes it highly attractive for applications.
KW  - conductivity
KW  - interface engineering
KW  - molecular electronics
KW  - self-assembled monolayers
KW  - thermal stability
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/83264
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-832649
SN  - 2199-160X
N1  - Funding: European Regional Development Fund. ; POIG.02.02.00-12-023/08
N1  - Open access funding enabled and organized by Projekt DEAL.
N1  - Funding: Narodowe Centrum Nauki. ; UMO2015/19/B/ST5/01636
VL  - 7
IS  - 2, art. 2000947
SP  - 1
EP  - 13
PB  - Wiley-VCH Verlag GmbH & Co. KG
CY  - Weinheim
ER  -