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Surface modification
About: Surface modification is a research topic. Over the lifetime, 35544 publications have been published within this topic receiving 859567 citations.
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TL;DR: It is shown that covalent aryl diazonium functionalization suppresses the chemical degradation of exfoliated BP even after three weeks of ambient exposure, and thus improves its prospects for nanoelectronic applications.
Abstract: Functionalization of atomically thin nanomaterials enables the tailoring of their chemical, optical and electronic properties. Exfoliated black phosphorus (BP)-a layered two-dimensional semiconductor-exhibits favourable charge-carrier mobility, tunable bandgap and highly anisotropic properties, but it is chemically reactive and degrades rapidly in ambient conditions. Here we show that covalent aryl diazonium functionalization suppresses the chemical degradation of exfoliated BP even after three weeks of ambient exposure. This chemical modification scheme spontaneously forms phosphorus-carbon bonds, has a reaction rate sensitive to the aryl diazonium substituent and alters the electronic properties of exfoliated BP, ultimately yielding a strong, tunable p-type doping that simultaneously improves the field-effect transistor mobility and on/off current ratio. This chemical functionalization pathway controllably modifies the properties of exfoliated BP, and thus improves its prospects for nanoelectronic applications.
669 citations
TL;DR: In this article, various surface modification procedures were used on glassy carbon (GC) electrodes to yield surfaces with low oxide content or which lack specific oxide functional groups, and monolayers of several different adsorbates were formed on GC surfaces before electrochemical evaluation.
Abstract: Various well-established and novel surface modification procedures were used on glassy carbon (GC) electrodes to yield surfaces with low oxide content or which lack specific oxide functional groups. In addition, monolayers of several different adsorbates were formed on GC surfaces before electrochemical evaluation. Both the nonspecific monolayer adsorbates and reagents which chemisorb to specific functional groups were observed on the surface with Raman and photoelectron spectroscopy. The various GC surfaces were then evaluated for their electron transfer reactivity with nine redox systems in aqueous electrolyte, including Ru(NH3)62+/3+, Fe(CN6)3-/4-, ascorbic acid, and Feaq3+/2+. The nine systems were categorized according to their kinetic sensitivity to surface modification. Several, including Ru(NH3)62+/3+, are insensitive to surface modifications and are considered outer sphere. Feaq3+/2+, Vaq2+/3+, and Euaq2+/3+ are catalyzed by surface carbonyl groups and are very sensitive to the removal of surface...
669 citations
TL;DR: This paper presents a monograph on “Chimie Et Interdisciplinarite: Synthes̀e Analyse Modeĺisation (CEISAM),” written by D.Cleḿence Queffeĺec, Marc Petit, and Bruno Bujoli.
Abstract: Cleḿence Queffeĺec,† Marc Petit,†,‡ Pascal Janvier,† D. Andrew Knight, and Bruno Bujoli*,† †LUNAM Universite,́ CNRS, UMR 6230, Chimie Et Interdisciplinarite:́ Synthes̀e Analyse Modeĺisation (CEISAM), UFR Sciences et Techniques, 2, rue de la Houssinier̀e, BP 92208, 44322 NANTES Cedex 3, France ‡Universite ́ Pierre et Marie Curie (UPMC), CNRS, UMR7201, Institut Parisien De Chimie Molećulaire (IPCM), 4 place Jussieu, 75252 Paris Cedex 05, France Chemistry Department, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, United States
660 citations
TL;DR: Preliminary in vivo tests of the MAO-treated specimens on rabbits showed a considerable improvement in their osseointegration capability as compared to the pure titanium implant.
658 citations
TL;DR: The results indicate that surface charge density, is a critical element in designing a surface for maximum kill efficiency and the relevance of this finding to the mechanism of action is discussed.
657 citations