Acta Phys. -Chim. Sin. ›› 1993, Vol. 9 ›› Issue (04): 553-555.doi: 10.3866/PKU.WHXB19930424

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Structure Study on Nanoparticulate α-Fe2O3 Stearate Alternating Langmuir-Blodgett Films Using Ftir Spectra

Yang Jun; Peng Xiao-Gang; Zhang Yan; Li Tie-Jin   

  1. Institute of Atomic and Molecular Physics, Department of Chemistry, Jilin University, Changchun 130023
  • Received:1992-03-20 Revised:1992-06-13 Published:1993-08-15
  • Contact: Yang Jun

Abstract: We reported in this paper FTIR linear diehroic spectroscopy and anisotropic properties of the nanoparticulate α-Fe_2O_3-stearate alternating Langmuir-Blodgett films (Fe_2O_3-St LB films) a new inorganic-organic quantum superlattice system. A new method fitted to inorganic-organic alternating films is used to study the molecular orientation and discuss the order arrangement of the nanopartieles in the films. The the results show that a configuration of stearate ions bound to the surface of the nano-particles: COO~- group are spherically bound to the surface of the nanoparticles; the hydrocarbon chains are almost perpendicular (31°±5°) to the substrate (7 nm-Fe_2O_3-St LB films). The orientation of hydrocarbon chains and CH_2 scissors vibration show the existence of trans-zigzag planar structure for C—C broken bone of the hy7drocarbon chains, which is related to high-order structure of the alternate films.

Key words: Nano-meter particle, α-Fe2O3, LB film