Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (12): 1123-1126.doi: 10.3866/PKU.WHXB20031206

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Surface Enhanced Raman Spectra of Lipid Langmuir Monolayers at the Air-Water Interface

Dai Shu-Xi;Zhang Xing-Tang;Li Yun-Cai;Du Zu-Liang;Dang Hong-Xin   

  1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000; 2Key Laboratory of Special Functional Materials, Henan University, Kaifeng 475001
  • Received:2003-05-26 Revised:2003-07-29 Published:2003-12-15
  • Contact: Du Zu-Liang

Abstract: Surface enhanced Raman spectroscopy(SERS) has been used to study the octadecylamine(ODA) Langmuir monolayers and egg phosphatidylcholine(PC)/ODA mixed monolayers on colloidal silver subphase. The SERS enhancement results from the strong interaction between headgroups of the ODA molecules and silver nanoparticles in subphase. The results of Raman test for PC/ODA mixed monolayers show that the vibrational information of phospholipid molecules can be acquired in situ with surfactant-aided SERS effect. Work based on such systems could expand the application of SERS technique in the study of Langmuir monolayers at the air-water interface.

Key words: Surface enhanced Raman scattering(SERS), Langmuir Monolayer,  Molecular assembly, Langmuir-Blodgett technique, Silver colloids