title: Structural properties and Raman spectroscopy of lipid Langmuir monolayers at the air-water interface.
abstract: Spectra of octadecylamine (ODA) Langmuir monolayers and egg phosphatidylcholine (PC)/ODA-mixed monolayers at the air-water interface have been acquired. The organization of the monolayers has been characterized by surface pressure-area isotherms. Application of polarized optical microscopy provides further insight in the domain structures and interactions of the film components. Surface-enhanced Raman scattering (SERS) data indicate that enhancement in Raman spectra can be obtained by strong interaction between headgroups of the surfactants and silver particles in subphase. By mixing ODA with phospholipid molecules and spreading the mixture at the air-water interface, we acquired vibrational information of phospholipid molecules with surfactant-aided SERS effect.
authors.affiliation: Key Laboratory of Special Functional Materials, Henan University, Kaifeng 475001, PR China.
authors.forename: Shuxi
authors.initials: S
authors.lastname: Dai
authors.forename: Xingtang
authors.initials: X
authors.lastname: Zhang
authors.forename: Zuliang
authors.initials: Z
authors.lastname: Du
authors.forename: Yabin
authors.initials: Y
authors.lastname: Huang
authors.forename: Hongxin
authors.initials: H
authors.lastname: Dang
mesh_terms: D000388:Air; D000588:Amines / Q000737:chemistry; D008055:Lipids / Q000737:chemistry*; D018613:Microscopy, Confocal; D010713:Phosphatidylcholines / Q000737:chemistry; D010743:Phospholipids / Q000737:chemistry; D011312:Pressure; D012834:Silver / Q000737:chemistry; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*; D013816:Thermodynamics; D014867:Water / Q000737:chemistry*
chemical_list: D000588:Amines; D008055:Lipids; D010713:Phosphatidylcholines; D010743:Phospholipids; D013501:Surface-Active Agents; D014867:Water; D012834:Silver; C009317:stearylamine