Volume 119, Number 6, September 2017
|Number of page(s)||7|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||29 November 2017|
A review of molecular phase separation in binary self-assembled monolayers of thiols on gold surfaces(a)
Institute of Materials, École Politechnique Fédérale de Lausanne - Lausanne, Switzerland
Received: 13 September 2017
Accepted: 16 November 2017
Binary self-assembled monolayers (SAMs) on gold surfaces have been known to undergo molecular phase separation to various degrees and have been subject to both experimental and theoretical studies. On gold nanoparticles in particular, binary SAMs ligand shells display intriguing morphologies. Consequently, unexpected behaviors of the nanoparticles with respect to their biological, chemical, and interfacial properties have been observed. It is critical that the phase separation of binary SAMs be understood at both molecular and macroscopic level to create, and then manipulate, the useful properties of the functionalized surfaces. We look into the current understanding of molecular phase separation of binary SAMs on gold surfaces, represented by Au(111) flat surfaces and Au nanoparticles, from both theoretical and experimental aspects. We point out shortcomings and describe several research strategies that will address them in the future.
PACS: 68.43.Hn – Structure of assemblies of adsorbates (two- and three-dimensional clustering) / 68.55.Nq – Composition and phase identification / 68.47.Pe – Langmuir-Blodgett films on solids; polymers on surfaces; biological molecules on surfaces
© EPLA, 2017
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