Thermal Stability and Thermal Behavior of Nanoparticle a-Fe2O3-stearate Alternating Langmuir-BIodgett Multilayer

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (S1): 41.

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Thermal Stability and Thermal Behavior of Nanoparticle a-Fe₂O₃-stearate Alternating Langmuir-BIodgett Multilayer

PENG Xiao-gang¹, LI Lin-song¹, ZHANG Yan¹, BAI Yu-bai¹, LI Tie-jin²

1. Department of Chemistry, Jilin University, Changchun, 130023, P. R. C.;
2. Department of Chemistry, Liaoning Normal University, Dalian, P. R. C

Received:1995-08-24 Online:1995-12-31 Published:1995-12-31
Supported by:
National Natural Science Foundation of China

Abstract

Abstract:

Thermal stability and thermal behavior of nanoparticulate α-Fe₂O₃-stearate alternating Langmuir-Blodgett multilayer have been studied through temperature dependent FTIR spectroscopy. The results show that this multilayer has an excellent thermal stability. From 60℃ to 150℃,the alkyl chains in the multilayer can keep "all trans" configuration and the Fe₂O₃ nanopar-ticle multilayer film structure still remains an order structure. From 200℃ to 220℃, the film undergoes a phase transition from solid to liquid. Tins high melting point is due to the high molecular weight (at least 105 atomic weight units for one nanoparticle) and the stearate ions are chemically bonded to it.

Key words: Nanoparticle, LB films, IR spectrum

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PENG Xiao-gang, LI Lin-song, ZHANG Yan, BAI Yu-bai, LI Tie-jin, YU Zhan-jun. Thermal Stability and Thermal Behavior of Nanoparticle a-Fe₂O₃-stearate Alternating Langmuir-BIodgett Multilayer[J]. Chem. J. Chinese Universities, 1995, 16(S1): 41.

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Thermal Stability and Thermal Behavior of Nanoparticle a-Fe₂O₃-stearate Alternating Langmuir-BIodgett Multilayer

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