Exploiting optical properties of nanopolycrystalline diamond in high pressure experiments

Abstract: We investigated the optical properties (absorption, luminescence and Raman spectra) of nanopolycrystalline diamond (NPD) aiming at exploring its capabilities as a pressure sensor and as a pressure-cell anvil for combined X-ray/neutron and optical studies. Notably, we analysed the Raman peak shift and broadening with pressure using a Moissanite Anvil Cell (MAC). The results are compared with those obtained in a DAC, where Raman signals from NPD chips and diamond anvils strongly overlap. Its pressure behaviour in the hydrostatic and non-hydrostatic regimes were investigated. We showed that the nanopolycrystalline structure induces remarkable differences in the peak shift and broadening between NPD and natural type IIa single-crystal diamond, making NPD suitable as pressure gauge for pressure determination and testing hydrostaticity of pressure transmitting medium.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: High Pressure Research, 40:1, 107-118 (2020)

Editorial: Taylor & Francis

 Año de publicación: 2020

Nº de páginas: 12

Tipo de publicación: Artículo de Revista

DOI: 10.1080/08957959.2019.1702173

ISSN: 0895-7959,1026-7522

Proyecto español: MAT2015-69508-P ; PGC2018-101464-B-I00 ; RED2018-102612-T

Url de la publicación: https://doi.org/10.1080/08957959.2019.1702173