High Pressure Synthesis of Covalently-Bonded Networks

9705551加成这个项目探索了在压力下合成新型共价键合网络。这些实验利用钻石砧座技术，在20到100千兆帕斯卡的极端压力下，在4到3000开尔文的温度下进行合成，并结合对新材料的形成和性能的原位和非原位测量，这些新材料包括碳氮化物和新的石墨碳相。现有的拉曼系统将被改装成在光谱的紫外区工作，并作为一种原位表征技术。碳在科学和技术中发挥着中心作用，正如目前强调的那样，这类材料被不同地称为富勒烯和纳米管。高压和高温合成其他碳基共价网络的途径将提供更多具有壮观的光学、机械和电子性能的新化合物类别。***

9705551 Badding This project explores the synthesis under pressure of novel covalently bonded networks. The experiments utilize diamond anvil cell techniques, to achieve synthesis at extreme pressures of 20 to 100 gigapascals, and at temperatures from 4 to 3000 Kelvin, combined with in-situ and ex-situ measurements of the formation and properties of new materials consisting of covalently binded networks to include carbon nitrides and novel carbon phases of graphite. An existing Raman system will be adapted for operation in the ultraviolet region of the spectrum and used as an in-situ technique for characterization. %%% Carbon plays a central role in science and technology as exhibited by the present emphasis upon the class of materials variously referred to as fullerenes and nanotubes. High-pressure and temperature routes to the synthesis of other carbon based covalent networks will provide additional new classes of compounds with spectacular optical, mechanical, and electronic properties. ***