Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 405424
Title Photothermal Micro- and Nanopatterning of Organic/Silicon Interfaces
Author(s) Klingebiel, B.; Scheres, L.M.W.; Franzka, S.; Zuilhof, H.; Hartmann, N.
Source Langmuir 26 (2010)9. - ISSN 0743-7463 - p. 6826 - 6831.
Department(s) Laboratory for Organic Chemistry
Publication type Refereed Article in a scientific journal
Publication year 2010
Keyword(s) self-assembled monolayers - hydrogen-terminated silicon - atomic-force microscope - scanned probe oxidation - organic monolayers - alkylsiloxane monolayers - alkyl monolayers - visible-light - surfaces - attachment
Abstract Photothermal laser processing of organic monolayers on oxide-free silicon substrates under ambient conditions is investigated. Organic monolayers on Si(100) and Si(111) substrates are prepared via hydrosilylation of H-terminated silicon samples in neat 1-hexadecene and 1-hexadecyne, respectively. Laser processing at ¿ = 514 nm and a 1/e2 spot diameter of 2.6 µm results in local decomposition of the monolayers and oxidation of the exposed substrate. In agreement with the high thermal and chemical stability of these monolayers, a thermokinetic analysis of the data from experiments at distinct laser powers and pulse lengths points to a highly activated process. As a result, processing is strongly nonlinear and allows for subwavelength patterning, with line widths between 0.4 and 1.4 µm. Most remarkably, upon fabrication of dense line patterns, narrow organic monolayer stripes with sharp edges and lateral dimensions of 80 nm are formed. This opens up new perspectives in photothermal engineering of organic/silicon interfaces, e.g., for hybrid microelectronic and sensor applications
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