Wetting Phenomena of Mercury near the critical point

众所周知，液体汞是环境条件下固体非金属物质上的一种非湿物质。在一个常见的非湿物质的经验中，最接近的例子是玻璃板上的汞滴。However，在高温下，高压接近液体蒸汽临界点的临界点，我们发现那个蓝宝石基底被水星湿润了。这一变化从非湿到湿需要一个地方作为第一顺序阶段的过渡，它被称为湿过渡。在目前的研究中，我们已经尝试开发出更进一步的研究我们发明了一种新的实验技术，用于椭圆体测量，它可以应用于高温和高压条件。由于使用了这一技术，我们成功地确定了重要的物理量，就像覆盖一样，它是湿过渡的顺序参数。这项技术使我们有可能研究湿层的物理性质，作为两个维度的技能 ... More id，而我们包含了湿层具有半导体特性。此结果将为您提供有关问题的重要信息，因为蓝宝石基底被Mercury湿了。在补充中，我们发现，湿现象也可以通过测量热辐射强度来检测到。Indeed， a sharp dip in the thermal radiation intensity is observed in the prewetting superc #region， where the two-dimensional compressibility （逗号/逗号）イイD2 is expected to show a maximum due to the c#fluctuations。这里μ是化学潜力，正如我们在上面所描述的，我们发明了新的实验技术，我们可以在实验中确定平均值和物理数量的通量，以使湿润现象具有高准确性。这些技术是预期的，不仅适用于蓝宝石汞系统，而且适用于其他系统。The results of the present res\project are reported in "Adriatico res\conference on wetting" （Treste， Italy） as an invited lecture。在日本第一次会议上的“wetting phenomena”中的“The head investigator of the present res\project organized a symposium on the wetting phenomena”。Less（低）

It is well known that liquid mercury is a non-wetting substance on solid non-metallic substrate under the ambient conditions. Indeed the closest example in common experience of a non-wetting substance is a mercury drop on a glass plate. However, at high temperatures and high pressures close to the liquid-vapor critical point of mercury, we found that sapphire substrate is wetted with mercury. This change from non-wetting to wetting takes place as a 1st order phase transition, and is called a wetting transition.In the present study, we tried to develop the above study further. We invented a new experimental technique for ellipsometric measurements, which can be applied to high temperature and high pressure conditions. By using this technique, we succeeded in determining important physical quantities, such as coverage Γ, which is the order parameter of the wetting transition. This technique makes us possible to study the physical properties of the wetting layer as an two-dimensional liqu … More id, and we concluded that the wetting layer has semiconducting properties. This result gives important information on the problem why the sapphire substrate is wetted by mercury. In addition, we found that the wetting phenomena can also be detected by measuring the thermal radiation intensity. Indeed, a sharp dip in the thermal radiation intensity is observed in the prewetting supercritical region, where the two-dimensional compressibility (αΓ/αμ)ィイD2τィエD2 is expected to show a maximum due to the critical fluctuations. Here μ is the chemical potential.As stated above, we invented new experimental techniques, by which we can determine experimentally both the mean values and the fluctuations of physical quantities characterizing the wetting phenomena with high accuracy. These techniques are expected to be applied not only to sapphire-mercury system but also to other systems. The results of the present research project are reported in "Adriatico research conference on wetting" (Treste, Italy) as an invited lecture. The head investigator of the present research project organized a symposium on "wetting phenomena" in the meeting of the physical society of Japan for the first time. Less