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arXiv 1907.12840cond-mat.mtrl-sci
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纯水的一个新的相干冰-冰模式第II部分:解释相互矛盾的霍尔数据

A new and coherent interstitial-ice model for pure water part II: explaining the conflicting Hall data

John De Poorter

摘要:

在本文的第一部分中,纯水的电行为是用质子-冰模型来描述的,即所谓的质子-半导体间质-冰或PSII模型。液态水由一个完整的冰状晶格组成,其中有相当大比例的空晶格位置和水分子填充开放的冰状晶格的间隙位置。结果表明,在水中,不是Grotthuss机制占主导地位,而是与空位相连的H $^+$和OH $^-$离子的热诱导跳跃机制。在第二部分中,这种跳跃机制进一步探讨和面临的小霍尔迁移率的离子,仍然无法解释的主流模型。发现了两种类型的配合物,第一种是由与离子电荷相反的空穴(H $^+$ VL和OH $^-$ VD)或中性空穴(H $^+$ V和OH $^-$ V)组成;这些络合物是离子迁移率的主要部分。然而,它们的运动改变了晶格结构的电极化密度,阻碍了这些复合物的霍尔效应。第二类络合物含有与离子(H $^+$ VD和OH $^-$ VL)电荷相似的空位。第二种类型只占电迁移率的一小部分(10-20%),但它们的运动不会改变晶格结构的电极化。它们负责测量的离子的小霍尔迁移率。

英文摘要:

In part I of this paper the electric behaviour of pure water is described by an interstitial-ice model, the so-called Protonic-Semiconductor Interstitial-Ice or PSII model. Liquid water consists of an intact ice-like lattice with a significant percentage of both vacant lattice positions and water molecules filling the interstitial sites of the open ice-like lattice. It is shown that not the Grotthuss mechanism is dominant in water but a thermally-induced hopping mechanism of the H$^+$ and OH$^-$ ions linked to vacancies. In part II this hopping mechanism is further explored and confronted to the small Hall mobilities of the ions, still unexplained with mainstream models. Two types of complexes are found. The first type is composed of either charged vacancies with the opposite charge of the ion (H$^+$VL and OH$^-$VD) or neutral vacancies (H$^+$V and OH$^-$V). These complexes are responsible for the major part of the mobility of the ions. However, their movement is changing the electric polarisation density of the lattice structure blocking the Hall effect of these complexes. The second type of complexes contains a vacancy charged similar as the ion (H$^+$VD and OH$^-$VL). This second type is responsible for only a small fraction of the electric mobility (10-20%), but their movement is not altering the electric polarisation of the lattice structure. They are responsible for the measured small Hall mobilities of the ions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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