Structure, spectra, and mobility of low-pressure ices: Ice I, amorphous solid water, and clathrate hydrates at T< 150 K
Structure, spectra, and mobility of low-pressure ices: Ice I, amorphous solid water, and clathrate hydrates at T< 150 K
复制标题
低压冰的结构、光谱和迁移率：T< 150 K 时的冰 I、无定形固体水和笼形水合物
DOI：
--
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
J. Devlin
中科院分区：
文献类型：
--
作者：
J. Devlin
最近在低压水冰，包括笼形水合物的研究进展，检查，突出现代科学可能与水冰在地外环境中的行为方面。已作出努力，以确定冰的属性，可能是重要的条件下，存在于这样的环境中，并审查了解这些属性的进展。结晶冰I的基础科学相对成熟，但关注的是诸如点缺陷的概念，这些概念继续发展，并且以重要的方式与冰I以及无定形冰和笼形水合物的低温行为相关。一个概念的无定形和微孔无定形冰，在20世纪80年代初开发的，但最近的表征强调。同样，笼形水合物的基本性质也得到了总结，并用于讨论最近认识到的可能在空间科学中很重要的特性。特别强调的是在低于150 K的温度下，在真空中笼形水合物的形成，红外光谱和行为。该评论以关于冰纳米颗粒特性的部分结束，冰纳米颗粒最近才成为分子科学的一个主题。冰粒的现代实验和理论研究主要集中在冰粒表面的红外光谱和结构，以及冰粒表面与分子吸附物的相互作用。由于除高能辐射外，冰通常通过表面过程与环境相互作用，因此此类研究可能会启发未来的研究。
Recent advances in the study of low-pressure water ices, including clathrate hydrates, are examined, highlighting aspects of modern science possibly related to the behavior of water ices in extraterrestrial environments. An effort has been made to identify properties of ice that are likely to be important in the conditions that exist in such environments and to review advances in understanding these properties. The basic science of crystalline ice I is relatively mature, but attention is given to concepts, such as point defects, which continue to evolve and which relate in an important manner to the low-temperature behavior of ice I as well as of amorphous ice and the clathrate hydrates. A concept of amorphous and microporous amorphous ice, developed in the early 1980s, is presented, but more recent characterizations are emphasized. Similarly, fundamental properties of clathrate hydrates are summarized and used in discussions of more recently appreciated characteristics that may be important in space science. Particular emphasis is placed on the formation, infrared spectroscopy, and behavior of clathrate hydrates in vacuo at temperatures below 150 K. The review closes with a section on the properties of ice nanoparticles, which have only recently emerged as a subject of molecular science. Modern experimental and theoretical studies of ice particles have focused on the infrared spectra and structure of the ice surface, and the interaction of the surface with molecular adsorbates. Since, with the exception of high-energy radiation, ice normally interacts with its environment through surface processes, such research may enlighten future studies.