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Citation: GUO Hao, DAI Shu-Xi, SUN Cheng-Feng, WU Chao, HUANG Ya-Bin, DU Zu-Liang. In situ Raman Spectroscopy of Langmuir Monolayers at Air-Water Interface[J]. Acta Physico-Chimica Sinica, ;2006, 22(09): 1061-1064. doi: 10.3866/PKU.WHXB20060905 shu

In situ Raman Spectroscopy of Langmuir Monolayers at Air-Water Interface

1.
(Key Laboratory of Special Functional Materials, Henan University, Kaifeng 475001, P. R. China)

Received Date: 20 January 2006
Available Online: 4 September 2006

A new approach for the acquisition of in situ Raman spectra of Langmuir monolayers at air-water interface with minimal interference was presented. An in situ Raman instrument was designed, which comprises a Raman spectrometer (JY-U1000), a micro Langmuir-Blodgett trough, and a CCD imaging system. By lowering the subphase slowly until Langmuir monolayer deposited on a surface-enhanced Raman scattering (SERS) substrate that was placed under subphase in advance, Raman spectra of Langmuir monolayers of octadecylamine (ODA) and dipalmitoylphosph-atidylcholine (DPPC) have been acquired with od signal-to-noise ratio. These spectra present informations of the headgroup interaction and the ordering degree of alkane chains at different surface pressures. This new method could expand SERS application in the study of Langmuir monolayers at the air-water interface.
- Langmuir monolayer;Surface enhanced Raman scattering;In situ measuring
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