skip to main content

Title: Reversible elastic deformation of functionalized sp{sup 2} carbon at pressures of up to 33 GPa

We show that sp{sup 2} carbon bonded to silicon and oxygen can withstand reversible elastic deformation at pressures of up to 33 GPa. These experiments were carried out in a diamond anvil cell. In-situ Raman spectroscopy was employed to record the reversibility of elastic deformation by measuring the movement in the D and G peaks of carbon. Above 33 GPa the material, a silicon oxycarbide, transforms into an unidentified state which is retained upon unloading down to ambient pressure. Thermodynamical analysis suggests that the material could have transformed into a crystalline state at these ultrahigh pressures, driven by mechanical work.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. LeRoy Eyring Center for Solid State Science, Arizona State University, Tempe, Arizona 85287 (United States)
  2. Department of Physics, Colorado State University, Fort Collins, Colorado 80523 (United States)
  3. Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287 (United States)
  4. Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309 (United States)
Publication Date:
OSTI Identifier:
22350848
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 14; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRYSTALLIZATION; CRYSTALS; DEFORMATION; DIAMONDS; ELASTICITY; OXYGEN; PRESSURE RANGE GIGA PA; RAMAN SPECTROSCOPY; SILICON; THERMODYNAMIC PROPERTIES