Transformation of molecular CO2-III in low-density carbon to extended CO2-V in porous diamond at high pressures and temperatures. (12th July 2018)

• Record Type: Journal Article
• Authors: Kim, Minseob; Ryu, Young Jay; Lim, Jinhyuk; Yoo, Choong-Shik
• Is Part Of: Journal of physics. Volume 30:Number 31(2018)
• Publication Date: 2018-07-12
• Subjects: porous diamond -- CO2-V -- M-carbon -- high pressure; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aad02c
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: The ability to modify chemical bonding in dense heterogeneous solid mixtures by applying high pressure and temperature opens new opportunities to develop a greater number of novel materials with controlled structure, stability and exceptional physical properties. Here, we present the transformation of highly strained CO2 -III ( Cmca ) filled in porous low-density carbons (LDC) to extended CO2 -V ( I- 42 d ) encapsulated in porous diamond ( Fd- 3 m ) at high pressures and temperatures. The x-ray diffraction data indicates the density of porous diamond is about 5%–8% lower than that of bulk diamond and undergoes the structural distortion to monoclinic diamond ( C 2 /m or M-carbon) upon pressure unloading. This result, therefore, demonstrates a feasibility to use porous LDC as nm-scale reactors to synthesize and store carbon dioxide and other high energy density extended solids.