Apertureless Near‐Field Vibrational Imaging of Block‐Copolymer Nanostructures with Ultrahigh Spatial Resolution
抄録
<jats:title>Abstract</jats:title><jats:p><jats:italic>Nanodomains formed by microphase separation in thin films of the diblock copolymers poly(styrene‐</jats:italic>b<jats:italic>‐2‐vinylpyridine) (PS‐</jats:italic>b<jats:italic>‐P2VP) and poly(styrene‐</jats:italic>b<jats:italic>‐ethyleneoxide) (PS‐</jats:italic>b<jats:italic>‐PEO) were imaged by means of infrared scattering‐type near‐field microscopy. When probing at 3.39 μm (2950 cm</jats:italic><jats:sup>−<jats:italic>1</jats:italic></jats:sup><jats:italic>), contrast is obtained due to spectral differences between the C</jats:italic><jats:italic>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</jats:italic><jats:italic>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.</jats:italic></jats:p>
収録刊行物
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- ChemPhysChem
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ChemPhysChem 6 (10), 2197-2203, 2005-10-06
Wiley