Raman study of ionic water-based copper and zinc ferrite magnetic fluids

被引：27
|
作者：
Morais, PC [1 ]
da Silva, SW
Soler, MAG
Sousa, MH
Tourinho, FA
机构：
[1] Univ Brasilia, Inst fis Nucl Fis Aplicada, BR-70910900 Brasilia, DF, Brazil
[2] Univ Brasilia, Dept Quim, BR-70910900 Brasilia, DF, Brazil
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 201卷
关键词：
Raman spectroscopy; magnetic fluids; hydrogen bond; chemisorption;
D O I：
10.1016/S0304-8853(99)00003-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Raman spectroscopy is used to investigate the OH-bending and OH-stretching modes of chemisorbed OH-groups in copper-ferrite and zinc-ferrite water-based magnetic fluid samples. Room-temperature Raman spectra were taken from diluted magnetic fluid samples and compared with the spectrum taken from liquid water. The suppression of the symmetric OH-stretching Raman modes from the ionic magnetic fluid sample spectra is discussed in terms of the replacement of a hydrogen atom from the water molecule by the nanoparticle surface. Moreover, changes on the area ratio between hydrogen bonded and nonhydrogen bonded OH-Raman peaks in the ionic magnetic fluid samples, as compared to the OH-Raman peaks from liquid water, are discussed in terms of changes on the hydrogen bond strength. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：105 / 109
页数：5
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