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首页> 外文期刊>Materials Chemistry and Physics >Preparation, magnetization, and microstructure of ionic ferrofluids based on γ-Fe_2O_3/Ni_2O_3 composite nanoparticles
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Preparation, magnetization, and microstructure of ionic ferrofluids based on γ-Fe_2O_3/Ni_2O_3 composite nanoparticles

机译：基于γ-Fe_2O_3/ Ni_2O_3复合纳米粒子的离子铁磁流体的制备，磁化和微观结构

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摘要

Ionic ferrofluids based on γ-Fe_2O_3/Ni_2O_3 composite nanoparticles are a polydispersed system prepared by the Massart method. The magnetization and optical relaxation behaviors of these ferrofluids show that, in addition to the ring-free micelle aggregates, there are also chainlike aggregates in the ferrofluids. The chainlike aggregation is attributed to so-called "depletion force" in the polydispersed ferrofluids because magnetic interaction between the ferrofluid particles is so weak that these particles cannot form the aggregates just by the magnetic interaction. For the γ-Fe_2O_3/Ni_2O_3 ionic ferrofluids, the "depletion force" stimulates the larger ferrofluid particles, forming short chains in the absence of a magnetic field and their macroscopic properties, e.g., magnetization and optical relaxation, all result from the short chains. Ferrofluids having chainlike aggregates alone could have excellent magneto-optical effects.
机译：基于γ-Fe_2O_3/ Ni_2O_3复合纳米粒子的离子铁磁流体是通过Massart方法制备的多分散体系。这些铁磁流体的磁化和光学弛豫行为表明，除无环胶束聚集体外，铁磁流体中还存在链状聚集体。链状聚集体归因于多分散的铁磁流体中的所谓“耗尽力”，因为铁磁流体颗粒之间的磁相互作用太弱，以至于这些颗粒不能仅通过磁相互作用而形成聚集体。对于γ-Fe_2O_3/ Ni_2O_3离子铁磁流体，“耗尽力”刺激较大的铁磁流体颗粒，在没有磁场的情况下形成短链，并且它们的宏观特性（例如磁化和光学弛豫）全部由短链产生。单独具有链状聚集体的铁磁流体可能具有出色的磁光效应。

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  • 来源
    《Materials Chemistry and Physics》 |2012年第1期|407-411|共5页
  • 作者

    Lihua Lin; Jian Li; Jun Fu; Yueqiang Lin; Xiaodong Liu;

  • 作者单位

    School of Physical Science & Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, China;

    School of Physical Science & Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, China;

    School of Physical Science & Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, China;

    School of Physical Science & Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, China;

    School of Physical Science & Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    magnetic materials; chemical synthesis; microstructure; magnetic properties;

    机译：磁性材料化学合成微观结构磁性;

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