Journal
CHEMICAL PHYSICS LETTERS
Volume 417, Issue 4-6, Pages 452-456Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2005.10.082
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Local spectroscopic investigation of liquid-liquid interfaces and their surroundings is experimentally challenging. Highly localized illumination by a near-field optical probe is a possibility, but precise positioning of the probe very close to such an interface prior to measurement has been very difficult. Here, we show how this difficulty is overcome with greatly improved instrumentation. Near-field Raman spectroscopy was used to study the water-carbon tetrachloride interface with a spatial resolution of 200 nm. A blue shift of the OH stretching vibration of water was observed when approaching the interface, indicative a weaker H-bond in the vicinity of the apolar CCl4. (c) 2005 Elsevier B.V. All rights reserved.
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