Apertureless near-field vibrational imaging of block-copolymer nanostructures with ultrahigh spatial resolution

Markus B. Raschke; Leopoldo Molina; Thomas Elsaesser; Dong Ha Kim; Wolfgang Knoll; Karsten Hinrichs

doi:10.1002/cphc.200500218

Apertureless near-field vibrational imaging of block-copolymer nanostructures with ultrahigh spatial resolution

Markus B. Raschke, Leopoldo Molina, Thomas Elsaesser, Dong Ha Kim, Wolfgang Knoll, Karsten Hinrichs

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

92 Scopus citations

Abstract

Nanodomains formed by microphase separation in thin films of the diblock copolymers poly(styrene-b-2-vinylpyridine) (PS-b-P2VP) and poly(styrene-b- ethyleneoxide) (PS-b-PEO) were imaged by means of infrared scattering-type near-field microscopy. When probing at 3.39 μm (2950 cm^-1), contrast is obtained due to spectral differences between the C-H stretching vibrational resonances of the respective polymer constituents. An all-optical spatial resolution better than 10 nm was achieved, which corresponds to a sensitivity of just several thousand C-H groups facilitated by the local-field enhancement at the sharp metallic probe tips. The results demonstrate that infrared spectroscopy with access to intramolecular dimensions is within reach.

Original language	English
Pages (from-to)	2197-2203
Number of pages	7
Journal	ChemPhysChem
Volume	6
Issue number	10
DOIs	https://doi.org/10.1002/cphc.200500218
State	Published - Oct 2005

Keywords

Block copolymers
IR spectroscopy
Nanostructures
Scanning probe microscopy
Vibrational imaging

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10.1002/cphc.200500218

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title = "Apertureless near-field vibrational imaging of block-copolymer nanostructures with ultrahigh spatial resolution",

abstract = "Nanodomains formed by microphase separation in thin films of the diblock copolymers poly(styrene-b-2-vinylpyridine) (PS-b-P2VP) and poly(styrene-b- ethyleneoxide) (PS-b-PEO) were imaged by means of infrared scattering-type near-field microscopy. When probing at 3.39 μm (2950 cm-1), contrast is obtained due to spectral differences between the C-H stretching vibrational resonances of the respective polymer constituents. An all-optical spatial resolution better than 10 nm was achieved, which corresponds to a sensitivity of just several thousand C-H groups facilitated by the local-field enhancement at the sharp metallic probe tips. The results demonstrate that infrared spectroscopy with access to intramolecular dimensions is within reach.",

keywords = "Block copolymers, IR spectroscopy, Nanostructures, Scanning probe microscopy, Vibrational imaging",

author = "Raschke, {Markus B.} and Leopoldo Molina and Thomas Elsaesser and Kim, {Dong Ha} and Wolfgang Knoll and Karsten Hinrichs",

year = "2005",

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doi = "10.1002/cphc.200500218",

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TY - JOUR

T1 - Apertureless near-field vibrational imaging of block-copolymer nanostructures with ultrahigh spatial resolution

AU - Raschke, Markus B.

AU - Molina, Leopoldo

AU - Elsaesser, Thomas

AU - Kim, Dong Ha

AU - Knoll, Wolfgang

AU - Hinrichs, Karsten

PY - 2005/10

Y1 - 2005/10

N2 - Nanodomains formed by microphase separation in thin films of the diblock copolymers poly(styrene-b-2-vinylpyridine) (PS-b-P2VP) and poly(styrene-b- ethyleneoxide) (PS-b-PEO) were imaged by means of infrared scattering-type near-field microscopy. When probing at 3.39 μm (2950 cm-1), contrast is obtained due to spectral differences between the C-H stretching vibrational resonances of the respective polymer constituents. An all-optical spatial resolution better than 10 nm was achieved, which corresponds to a sensitivity of just several thousand C-H groups facilitated by the local-field enhancement at the sharp metallic probe tips. The results demonstrate that infrared spectroscopy with access to intramolecular dimensions is within reach.

AB - Nanodomains formed by microphase separation in thin films of the diblock copolymers poly(styrene-b-2-vinylpyridine) (PS-b-P2VP) and poly(styrene-b- ethyleneoxide) (PS-b-PEO) were imaged by means of infrared scattering-type near-field microscopy. When probing at 3.39 μm (2950 cm-1), contrast is obtained due to spectral differences between the C-H stretching vibrational resonances of the respective polymer constituents. An all-optical spatial resolution better than 10 nm was achieved, which corresponds to a sensitivity of just several thousand C-H groups facilitated by the local-field enhancement at the sharp metallic probe tips. The results demonstrate that infrared spectroscopy with access to intramolecular dimensions is within reach.

KW - Block copolymers

KW - IR spectroscopy

KW - Nanostructures

KW - Scanning probe microscopy

KW - Vibrational imaging

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DO - 10.1002/cphc.200500218

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EP - 2203

JO - ChemPhysChem

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Apertureless near-field vibrational imaging of block-copolymer nanostructures with ultrahigh spatial resolution

Abstract

Keywords

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