Structure and characterization of surfactant-capped CdS nanoparticle films by the Langmuir-Blodgett technique

Jan Jin, Lin Song Li, Yan Qing Tian, Yan Jie Zhang, Yang Liu, Ying Ying Zhao, Tong Shun Shi, Tie Jin Li

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Oligomer-polymaleic acid octadecanol esters (PMAO) with different ratios between carboxylic groups and hydrocarbon chains stabilized CdS nanoparticles were produced in the form of reversed micelles. The PM AO-capped CdS nanoparticles were transferred from the air-water interface onto CaF2 and silicon substrates. Surface pressure-area isotherms gave the information that both the two kinds of pure PMAO and PMAO-capped CdS could form stable monolayers on the water subphase. From the area occupied by average molecular unit (0.24 and 0.11 nm2), it was concluded that the size of two kinds of PMAO-capped CdS nanoparticles was different. The results of UV-vis spectra gave us information that the diameter of CdS nanoparti des could be controlled to less than 2 nm. The measurement of Fourier transform infrared spectroscopy (FTIR) confirmed the formation of CdS The average tilt angle of hydrocarbon chains revealed by polarized IR spectra was 50 and 60·, respectivay. The long spacing of the multilayer of PMAO-capped CdS determined by small angle X-ray diffraction was 6.3 and 4.8 nm, which also maintained the conclusion that the ratio between carboxylic groups and hydrocarbon chains effect the size of reversed micelles.

Original languageEnglish (US)
Pages (from-to)559-562
Number of pages4
JournalThin Solid Films
Issue number1-2
StatePublished - 1998
Externally publishedYes


  • CdS nanoparticles
  • Langmuir-Blodgett films
  • Oligomer
  • Reversed micelle

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry


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