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首页> 外文期刊>Physica, B. Condensed Matter >Surfactant effect on the conductivity behavior of CsH_2PO _4: Characterization by electrochemical impedance spectroscopy
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Surfactant effect on the conductivity behavior of CsH_2PO _4: Characterization by electrochemical impedance spectroscopy

机译：表面活性剂对CsH_2PO _4电导行为的影响：电化学阻抗谱表征

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摘要

Cesium dihydrogen phosphate (CDP) nanoparticles were synthesized using the surfactants cetyltrimethyl ammonium bromide (CTAB), polyoxyethylenepolyoxypropylene (F-68) and (F-68:CTAB) with molar ratio 0.06. The samples conductivity such as CDP_(CTAB), CDP_(F-68) and CDP_((F-68:CTAB)0.06) was studied by impedance spectroscopy in the frequency range 0.01 Hz to 1 MHz. The Nyquist plots were drawn at different temperatures of 210, 230 and 260 °C, which are defined below transition, phase transition and above transition, respectively. The measured conductivities obey the Arrhenius relation. The influence of surfactants on conductivity are more significant at higher temperature due to grain boundary. The conductivity of CDPCTAB increased slightly with increasing temperature to 260 °C, whereas the conductivity of other samples decreased with increasing temperature over 230 °C. The results indicated that the conductivities increase in the order of CDP_(CTAB)>CDP _((F-68:CTAB)0.06)>CDP_(F-68). These are in accordance to the ion exchange capacities of the samples that the surfactant shows a direct influence on the samples proton mobility. It is found that the conductivity of CsH_2PO_4 is influenced by surfactant type.
机译：使用十六烷基三甲基溴化铵（CTAB），聚氧乙烯-聚氧丙烯（F-68）和（F-68：CTAB）摩尔比为0.06的磷酸二氢铯（CDP）纳米颗粒进行合成。通过阻抗谱在0.01 Hz至1 MHz的频率范围内研究了样品电导率，例如CDP_（CTAB），CDP_（F-68）和CDP _（（F-68：CTAB）0.06）。奈奎斯特图是在210、230和260°C的不同温度下绘制的，分别定义在转变以下，相变和转变以上。测得的电导率符合Arrhenius关系。由于晶界的缘故，表面活性剂对导电性的影响在较高温度下更为显着。 CDPCTAB的电导率随温度升高至260°C而略有增加，而其他样品的电导率随温度超过230°C而降低。结果表明，电导率以CDP_（CTAB）> CDP _（（F-68：CTAB）0.06）> CDP_（F-68）的顺序增加。这些取决于样品的离子交换能力，即表面活性剂直接影响样品的质子迁移率。发现CsH_2PO_4的电导率受表面活性剂类型的影响。

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