Journal ArticleDOI
Electrochemical properties of (111)-oriented n-si surfaces derivatized with covalently-attached alkyl chains
Ashish Bansal,Nathan S. Lewis +1 more
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In this article, the electrochemical properties of alkyl-terminated, (111)-oriented, n-type Si surfaces, prepared via a two-step halogenation/alkylation procedure, were analyzed in contact with CH3OH−1,1' -dimethylferrocene+/0 (Me2Fc+/ 0) solutions.Abstract:
The electrochemical properties of alkyl-terminated, (111)-oriented, n-type Si surfaces, prepared via a two-step halogenation/alkylation procedure, were analyzed in contact with CH3OH−1,1‘-dimethylferrocene+/0 (Me2Fc+/0) solutions. Current density−potential and differential capacitance−potential measurements of these surfaces in contact with CH3OH−Me2Fc+/0 indicated that the electrochemical properties of the alkyl-terminated surfaces were very similar to those of the H-terminated Si surface. The alkyl overlayers did not shift the Si band edges or induce significant surface recombination, but they did provide an additional electrical series resistance to charge transfer across the Si/liquid interface. The efficacy of alkyl overlayers in preventing photooxidation and photocorrosion of n-silicon surfaces was measured in contact with CH3OH−Me2Fc+/0 solutions to which a known amount of water had been added. Under these conditions, the alkyl-terminated surfaces consistently showed excellent current density−poten...read more
Citations
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Journal ArticleDOI
Controlled molecular adsorption on silicon: laying a foundation for molecular devices.
TL;DR: This review is about understanding and controlling organic molecular adsorption on silicon and a discussion of recent studies of adsorbate structure is presented to provide a microscopic picture of structure and bonding in covalently attached molecule-silicon surface systems.
PatentDOI
Polymer pen lithography
TL;DR: The tip array can be prepared using conventional photolithographic methods and can be tailored to have any desired number and/or arrangement of tips as discussed by the authors, which can be used for printing indicia on a substrate using a tip array comprised of elastomeric, compressible polymers.
Journal ArticleDOI
Wet chemical routes to the assembly of organic monolayers on silicon surfaces via the formation of Si–C bonds: surface preparation, passivation and functionalization
TL;DR: This critical review aims to bring together the available wet-chemical routes toward the formation of silicon-organic monolayers under ambient conditions and discusses the reasons behind the need for novel chemical approaches that are straightforward, modular and of wide scope so as to allow the application of silicon electrodes in aqueous electrolytes.
Journal ArticleDOI
Insights into the Formation Mechanisms of Si−OR Monolayers from the Thermal Reactions of Alcohols and Aldehydes with Si(111)−H1
TL;DR: In this paper, a mechanism for the reaction of the aldehyde with Si(111)−H is proposed which is analogous to the well-known hydrosilylation of aldehydes, which proceeds either by nucleophilic addition/hydride transfer or by a radical chain mechanism via adventitious radical initiation.
Journal ArticleDOI
Preparation of air-stable, low recombination velocity Si(111) surfaces through alkyl termination
TL;DR: In this article, a two-step, chlorination/alkylation procedure has been used to convert the surface Si-H bonds on NH4F(aq)-etched (111)-oriented Si wafers into Si-alkyl bonds of the form Si−CnH2n + 1 (n>=1).
References
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Book
Electrochemical Methods: Fundamentals and Applications
Allen J. Bard,Larry R. Faulkner +1 more
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Journal ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
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