High Pressure Synthesis of Covalently-Bonded Networks

本项目探索新型共价键合网络在压力下的合成。该实验利用金刚石砧细胞技术，在20至100千帕斯卡的极端压力和4至3000开尔文的温度下实现合成，并结合原位和非原位测量由共价结合网络组成的新材料的形成和性质，包括碳氮化物和石墨的新型碳相。现有的拉曼系统将适用于紫外光谱区域的操作，并用作表征的原位技术。碳在科学和技术中起着核心作用，目前对富勒烯和纳米管这类材料的重视表明了这一点。高压和温度合成其他碳基共价网络的途径将提供额外的新型化合物，这些化合物具有惊人的光学、机械和电子性能。＊＊＊

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. ***