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Title:Non-Covalent Functionalization of Graphene Using Self-Assembly of Alkane-Amines
Authors:B. Long, M. Manning, M. Burke, B.N. Szafranek, G. Visimberga, D. Thompson, J.C. Greer, I.M. Povey, J. MacHale, G. Lejosne, D. Neumaier, A.J. Quinn, 2012
Abstract: A simple, versatile method for non-covalent functionalization of graphene based on solution-phase assembly of alkane-amine layers is presented. Second-order Møller–Plesset (MP2) perturbation theory on a cluster model (methylamine on pyrene) yields a binding energy of ≈220 meV for the amine–graphene interaction, which is strong enough to enable formation of a stable aminodecane layer at room temperature. Atomistic molecular dynamics simulations on an assembly of 1-aminodecane molecules indicate that a self-assembled monolayer can form, with the alkane chains oriented perpendicular to the graphene basal plane. The calculated monolayer height (≈1.7 nm) is in good agreement with atomic force microscopy data acquired for graphene functionalized with 1-aminodecane, which yield a continuous layer with mean thickness ≈1.7 nm, albeit with some island defects. Raman data also confirm that self-assembly of alkane-amines is a non-covalent process, i.e., it does not perturb the sp2 hybridization of the graphene. Passivation and adsorbate n-doping of graphene field-effect devices using 1-aminodecane, as well as high-density binding of plasmonic metal nanoparticles and seeded atomic layer deposition of inorganic dielectrics using 1,10-diaminodecane are also reported.
ICHEC Project:Computer-aided design of controllable interfaces for nanoelectronics
Publication:Advanced Functional Materials. 22, 717–725.
URL: http://onlinelibrary.wiley.com/doi/10.1002/adfm.201101956/abstract
Keywords: graphene;self-assembled monolayers;alkane-amine layers;field-effect devices;atomic layer deposition
Status: Accepted

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