Preparation of pure Y-type Langmuir-Blodgett films of lead stearate and their reaction with hydrogen sulphide

• Published in: Thin solid films Vol. 242; no. 1; pp. 118 - 121
• Main Authors: Peng, Xiaogang, Chen, Haiyan, Kan, Shihai, Bai, Yubai, Li, Tiejin
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 15.04.1994; Elsevier Science
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Langmuir-blodgett films; Physics; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thin films; Elaboration; Infrared spectrometry; Langmuir-Blodgett films; Lead complexes; Organometallic compounds; X-ray diffraction; Hydrogen sulfides; Experimental study; Structure; Langmuir isotherm; Stearates
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/0040-6090(94)90513-4

Higher residual PbCl 2 concentration was found within lead stearate (PbSt 2) Langmuir-Blodgett (LB) films deposited on the surface of 10 −3 mol 1 −1 PbCl 2 aqueous solution. LB films with an acceptable composition can be obtained in the case of lower PbCl 2 concentrations (less than 5 × 10 −4 mol 1 −1). A pure Y-type transfer form for PbSt 2 LB films was observed on a subphase with a lower PbCl 2 concentration as a result of using a faster dipping speed (10 cm min −1). Using X-ray diffraction measurements, it was determined that the pure Y-type PbSt 2 LB films possess a certain number of layers which is the same as the value recorded during the deposition period. The rate of the chemical reaction of the pure Y-type PbSt 2 LB films with H 2S was found to be at least one order of magnitude slower than that in the case of the PbSt 2 LB films deposited at the lower dipping speed.