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- W2024304299 abstract "Light-induced reactions of Si surfaces with carboxylic acids to generate Si ester-modified surfaces are studied. The reaction proceeds by photoelectrochemical oxidation of porous or (100)-oriented single-crystal n-type Si in formic, acetic, or trifluoroacetic acid electrolyte solutions. The reaction products at the porous Si surface are identified by Fourier-transform infrared (FTIR) spectroscopy. Derivatization with esters reduces the photoluminescence intensity of porous Si. X-ray photoelectron spectroscopy (XPS) of derivatized single-crystal Si is used to confirm the compositional and bonding information and to demonstrate that the same chemistry occurs at a single-crystal Si surface. A mechanism is proposed in which illumination of reverse-biased Si removes electron density from the Si surface, rendering Si−Si bonds susceptible to nucleophilic attack by carboxylic acid. The reaction has a marked dependence on light intensity and the Si surface can be photopatterned by illumination through a mask during derivatization. Ester-patterned porous Si reacts with CH3(CH2)7(CH3)2SiOCH3, generating an organosilane-patterned Si surface." @default.
- W2024304299 created "2016-06-24" @default.
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- W2024304299 date "1996-01-01" @default.
- W2024304299 modified "2023-10-18" @default.
- W2024304299 title "Light-Induced Reactions of Porous and Single-Crystal Si Surfaces with Carboxylic Acids" @default.
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- W2024304299 doi "https://doi.org/10.1021/ja960777l" @default.
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