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Title: Photothermal effects during nanodiamond synthesis from a carbon aerogel in a laser-heated diamond anvil cell

Nanodiamonds have emerged as promising materials for quantum computing, biolabeling, and sensing due to their ability to host color centers with remarkable photostability and long spin-coherence times at room temperature. Recently, a bottom-up, high-pressure, high-temperature (HPHT) approach was demonstrated for growing nanodiamonds with color centers from amorphous carbon precursors in a laser-heated diamond anvil cell (LH-DAC) that was supported by a near-hydrostatic noble gas pressure medium. However, a detailed understanding of the photothermal heating and its effect on diamond growth, including the phase conversion conditions and the temperature-dependence of color center formation, has not been reported. In this work, we measure blackbody radiation during LH-DAC synthesis of nanodiamond from carbon aerogel to examine these temperature-dependent effects. Blackbody temperature measurements suggest that nanodiamond growth can occur at 16.3 GPa and 1800 K. We use Mie theory and analytical heat transport to develop a predictive photothermal heating model. This model demonstrates that melting the noble gas pressure medium during laser heating decreases the local thermal conductivity to drive a high spatial resolution of phase conversion to diamond. In conclusion, we observe a temperature-dependent formation of nitrogen vacancy centers and interpret this phenomenon in the context of HPHT carbon vacancy diffusion.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [3]
  1. Univ. of Washington, Seattle, WA (United States)
  2. Naval Research Lab., Washington, D.C. (United States)
  3. Univ. of Washington, Seattle, WA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
Grant/Contract Number:
AC05-76RL01830
Type:
Accepted Manuscript
Journal Name:
Diamond and Related Materials
Additional Journal Information:
Journal Name: Diamond and Related Materials; Journal ID: ISSN 0925-9635
Publisher:
Elsevier
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1439096

Crane, Matthew J., Smith, Bennett E., Meisenheimer, Peter B., Zhou, Xuezhe, Stroud, Rhonda M., Davis, E. James, and Pauzauskie, Peter J.. Photothermal effects during nanodiamond synthesis from a carbon aerogel in a laser-heated diamond anvil cell. United States: N. p., Web. doi:10.1016/j.diamond.2018.05.013.
Crane, Matthew J., Smith, Bennett E., Meisenheimer, Peter B., Zhou, Xuezhe, Stroud, Rhonda M., Davis, E. James, & Pauzauskie, Peter J.. Photothermal effects during nanodiamond synthesis from a carbon aerogel in a laser-heated diamond anvil cell. United States. doi:10.1016/j.diamond.2018.05.013.
Crane, Matthew J., Smith, Bennett E., Meisenheimer, Peter B., Zhou, Xuezhe, Stroud, Rhonda M., Davis, E. James, and Pauzauskie, Peter J.. 2018. "Photothermal effects during nanodiamond synthesis from a carbon aerogel in a laser-heated diamond anvil cell". United States. doi:10.1016/j.diamond.2018.05.013.
@article{osti_1439096,
title = {Photothermal effects during nanodiamond synthesis from a carbon aerogel in a laser-heated diamond anvil cell},
author = {Crane, Matthew J. and Smith, Bennett E. and Meisenheimer, Peter B. and Zhou, Xuezhe and Stroud, Rhonda M. and Davis, E. James and Pauzauskie, Peter J.},
abstractNote = {Nanodiamonds have emerged as promising materials for quantum computing, biolabeling, and sensing due to their ability to host color centers with remarkable photostability and long spin-coherence times at room temperature. Recently, a bottom-up, high-pressure, high-temperature (HPHT) approach was demonstrated for growing nanodiamonds with color centers from amorphous carbon precursors in a laser-heated diamond anvil cell (LH-DAC) that was supported by a near-hydrostatic noble gas pressure medium. However, a detailed understanding of the photothermal heating and its effect on diamond growth, including the phase conversion conditions and the temperature-dependence of color center formation, has not been reported. In this work, we measure blackbody radiation during LH-DAC synthesis of nanodiamond from carbon aerogel to examine these temperature-dependent effects. Blackbody temperature measurements suggest that nanodiamond growth can occur at 16.3 GPa and 1800 K. We use Mie theory and analytical heat transport to develop a predictive photothermal heating model. This model demonstrates that melting the noble gas pressure medium during laser heating decreases the local thermal conductivity to drive a high spatial resolution of phase conversion to diamond. In conclusion, we observe a temperature-dependent formation of nitrogen vacancy centers and interpret this phenomenon in the context of HPHT carbon vacancy diffusion.},
doi = {10.1016/j.diamond.2018.05.013},
journal = {Diamond and Related Materials},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {5}
}