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  Ordered deposition of inorganic clusters from micellar block copolymer films

Spatz, J. P., Mössmer, S., Hartmann, C., Möller, M., Herzog, T., Krieger, M., et al. (2000). Ordered deposition of inorganic clusters from micellar block copolymer films. Langmuir, 16(2), 407-415. doi:10.1021/la990070n.

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Spatz, Joachim P.1, 2, Author           
Mössmer, Stefan, Author
Hartmann, Christoph, Author
Möller, Martin, Author
Herzog, Thomas, Author
Krieger, Michael, Author
Boyen, Hans-Gerd, Author
Ziemann, Paul, Author
Kabius, Bernd, Author
Affiliations:
1Cellular Biophysics, Max Planck Institute for Medical Research, Max Planck Society, ou_2364731              
2Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg, 69120 Heidelberg, Germany, ou_persistent22              

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 Abstract: A method is presented for generating quasiregular arrays of nanometer-sized noble metal and metal oxide clusters on flat substrates by the use of a polymer template. The approach is of general applicability to other metals and various oxides. In the first step, polymeric micelles with a polar core were generated by dissolution of poly(styrene)-block-poly(2-vinylpyridine) in toluene. These micelles were used as nanocompartments that were loaded with a defined amount of a metal precursor. The metal ions can be reduced in such a way that exactly one elemental or oxidic particle is formed in each micelle, where each particle is of equal size. By dipping a flat substrate into a dilute solution, a monolayer of the micelles was obtained whereby the embedded equally large particles became arranged in a mesoscopic quasihexagonal two-dimensional (2-D) lattice. Exposure to an oxygen plasma allowed removal of the polymer completely, leaving the naked metal particles firmly attached to the substrate in the same quasihexagonal order as in the monomicellar film. A modified procedure in which the precursor salt was not reduced before the plasma treatment yielded clusters of identical size and in the same 2-D order. The size (height) of the clusters could be varied between 1 and 15 nm depending on the concentration of the metal salt. The interparticle distance could be varied between 30 and 140 nm by using block copolymers with different lengths of the blocks. Such lattices of Au particles have been used to bind streptavidin proteins in an ordered array.

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Language(s): eng - English
 Dates: 1999-01-211999-09-011999-11-102000
 Publication Status: Issued
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 Identifiers: ISI: ISI:000084890100022
ISSN: 0743-7463
DOI: 10.1021/la990070n
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Title: Langmuir
Source Genre: Journal
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Publ. Info: Columbus, OH : American Chemical Society
Pages: - Volume / Issue: 16 (2) Sequence Number: - Start / End Page: 407 - 415 Identifier: ISSN: 0743-7463
CoNE: https://pure.mpg.de/cone/journals/resource/954925541194