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|a eng
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|a Majumdar, Gitanjali
|e verfasserin
|4 aut
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|a Lithography for imprinting colored patterns with quantum dots
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|c 2006
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|b nc
|2 rdacarrier
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|a Date Completed 06.06.2007
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|a Date Revised 21.03.2006
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a In this article, we report a new form of lithography that involves a reaction between a gas and an ion embedded in a polymer film. The principle is based on a combination of top-down and bottom-up approaches in which a transmission electron microscope grid is placed on a poly(vinylpyrrolidone) film containing Cd2+ ions, which is then exposed to H2S gas. This leads to the generation of a fluorescent yellow pattern due to the formation of CdS nanoparticles on exposed parts of the film. Also, we have used the same method to generate patterns in two colors by starting with a green fluorescent dye incorporated into the film and following the same procedure in which patterned yellow-orange CdS nanoaparticles are distributed over the background fluorescence of the dye. We have used fluorescence microscopy, UV-vis and fluorescence spectroscopy, transmission electron microscopy, atomic force microscopy, and X-ray diffraction methods for the characterization of the products and patterns. This method could possibly be a fairly general method of generating patterned materials on 2D and 3D substrates
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|a Journal Article
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|a Gogoi, Sonit Kumar
|e verfasserin
|4 aut
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|a Paul, Anumita
|e verfasserin
|4 aut
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|a Chattopadhyay, Arun
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 22(2006), 7 vom: 28. März, Seite 3439-44
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|g volume:22
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