Journal ArticleDOI
Phosphonate self-assembled monolayers on aluminum surfaces
TLDR
Substrates of aluminum (Al) deposited by physical vapor deposition onto Si substrates and then chemically reacted with perfluorodecylphosphonic acid (PFDP alkylphosphonate, DPAlSi, and ODPAlSi) were studied to characterize their surface chemical composition, roughness, and micro-/nanotribological properties.Abstract:
Substrates of aluminum (Al) deposited by physical vapor deposition onto Si substrates and then chemically reacted with perfluorodecylphosphonic acid (PFDP∕Al∕Si), decylphosphonic acid (DP∕Al∕Si), and octadecylphosphonic acid (ODP∕Al∕Si) were studied by x-ray photoelectron spectroscopy (XPS), contact angle measurements, atomic force microscopy (AFM), and friction force microscopy, a derivative of AFM, to characterize their surface chemical composition, roughness, and micro-/nanotribological properties. XPS analysis confirmed the presence of perfluorinated and nonperfluorinated alkylphosphonate molecules on the PFDP∕Al∕Si, DP∕Al∕Si, and ODP∕Al∕Si. The sessile drop static contact angle of pure water on PFDP∕Al∕Si was typically more than 130° and on DP∕Al∕Si and ODP∕Al∕Si typically more than 125° indicating that all phosphonic acid reacted Al∕Si samples were very hydrophobic. The surface roughness for PFDP∕Al∕Si, DP∕Al∕Si, ODP∕Al∕Si, and bare Al∕Si was approximately 35nm as determined by AFM. The surface ener...read more
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Self-assembled monolayers of thiols and dithiols on gold: new challenges for a well-known system
TL;DR: The nature of the molecule-gold interface, whose chemistry and structure remain elusive, the self-assembly process on planar and irregular surfaces, and on nanometre-sized objects, and the chemical reactivity and thermal stability of these systems in ambient and aqueous solutions are reviewed.
Journal ArticleDOI
High-k organic, inorganic, and hybrid dielectrics for low-voltage organic field-effect transistors.
TL;DR: A comparison study of high-k Dielectric Materials for OFETs using self-Assembled Monoand Multilayers and Inorganic-Organic Bilayers to study the properties of polymeric-Nanoparticle Composites.
Journal ArticleDOI
A novel combination approach for the preparation of superhydrophobic surface on copper and the consequent corrosion resistance
TL;DR: In this article, super-hydrophobic surfaces on copper substrates are prepared by combining the etching and calcination treatment processes by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), Xray photoelectron spectroscopy (XPS), water contact angle, potentiodynamic polarization and electrochemical impedance spectrography techniques.
Journal ArticleDOI
Etching and heating treatment combined approach for superhydrophobic surface on brass substrates and the consequent corrosion resistance
TL;DR: In this paper, a combining etching and heat treatment approach was used to achieve a super-hydrophobic surface on brass, which exhibited good and persistent corrosion resistance in 3.5% NaCl aqueous solutions.
Journal ArticleDOI
Stability of phosphonic acid self-assembled monolayers on amorphous and single-crystalline aluminum oxide surfaces in aqueous solution.
TL;DR: The formation of octadecylphosphonic acid (ODPA) self-assembled monolayers (SAMs) and their stability in water has been studied on four distinctly different aluminum oxide surfaces to improve the understanding of the state of binding between the phosphonic acid to the oxide surface and how this interaction depends on the structure and termination of the oxidesurface.
References
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Journal ArticleDOI
Formation and Structure of Self-Assembled Monolayers.
TL;DR: Monolayers of alkanethiolates on gold are probably the most studied SAMs to date and offer the needed design flexibility, both at the individual molecular and at the material levels, and offer a vehicle for investigation of specific interactions at interfaces, and of the effect of increasing molecular complexity on the structure and stability of two-dimensional assemblies.
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TL;DR: In this paper, the authors present a model of self-assembled monolayers for the analysis of surface properties of Langmuir-Blodgett (LB) and Self-Assembled Monolayers (SA) films.
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