Morphological Control of InxGa1–xP Nanocrystals Synthesized in a Nonthermal Plasma

Bronstein, Noah D.; Wheeler, Lance M.; Anderson, Nicholas C.; Neale, Nathan R.

doi:10.1021/acs.chemmater.8b01358

Title: Morphological Control of In_xGa_1–xP Nanocrystals Synthesized in a Nonthermal Plasma

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Abstract

Here, we explore the growth of In_xGa_1–xP nanocrystals (x = 1, InP; x = 0, GaP; and 1 > x > 0, alloys) in a nonthermal plasma. By tuning the reactor conditions, we gain control over the morphology of the final product, producing either 10 nm diameter hollow nanocrystals or smaller 3 nm solid nanocrystals. We observe the gas-phase chemistry in the plasma reactor using plasma emission spectroscopy to understand the growth mechanism of the hollow versus solid morphology. We also connect this plasma chemistry to the subsequent native surface chemistry of the nanocrystals, which is dominated by the presence of both dative- and lattice-bound phosphine species. The dative phosphines react readily with oleylamine in an L-type ligand exchange reaction, evolving phosphines and allowing the particles to be dispersed in nonpolar solvents. Subsequent treatment by HF causes the solid InP_1.5 and In_0.5Ga_0.5P_1.3 to become photoluminescent, whereas the hollow particles remain nonemissive.

Authors:

^[1];

^[1]; Anderson, Nicholas C. ^[1];

^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)

Publication Date:: Mon Apr 09 00:00:00 EDT 2018

Research Org.:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Energy Efficiency and Renewable Energy (EERE), NREL Laboratory Directed Research and Development (LDRD)

OSTI Identifier:: 1435706

Report Number(s):: NREL/JA-5900-70999
Journal ID: ISSN 0897-4756

Grant/Contract Number:: AC36-08GO28308

Resource Type:: Accepted Manuscript

Journal Name:: Chemistry of Materials

Additional Journal Information:: Journal Volume: 30; Journal Issue: 9; Journal ID: ISSN 0897-4756

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; nanocrystals; morphology; growth mechanisms; plasma chemistry

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                    Bronstein, Noah D., Wheeler, Lance M., Anderson, Nicholas C., and Neale, Nathan R. Morphological Control of InxGa1–xP Nanocrystals Synthesized in a Nonthermal Plasma.  United States: N. p., 2018. 
Web.  doi:10.1021/acs.chemmater.8b01358.

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                    Bronstein, Noah D., Wheeler, Lance M., Anderson, Nicholas C., & Neale, Nathan R. Morphological Control of InxGa1–xP Nanocrystals Synthesized in a Nonthermal Plasma.  United States.  https://doi.org/10.1021/acs.chemmater.8b01358

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                    Bronstein, Noah D., Wheeler, Lance M., Anderson, Nicholas C., and Neale, Nathan R. Mon .  
"Morphological Control of InxGa1–xP Nanocrystals Synthesized in a Nonthermal Plasma".  United States.  https://doi.org/10.1021/acs.chemmater.8b01358.  https://www.osti.gov/servlets/purl/1435706.

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@article{osti_1435706,

  title        = {Morphological Control of InxGa1–xP Nanocrystals Synthesized in a Nonthermal Plasma},

  author       = {Bronstein, Noah D. and Wheeler, Lance M. and Anderson, Nicholas C. and Neale, Nathan R.},

  abstractNote = {Here, we explore the growth of InxGa1–xP nanocrystals (x = 1, InP; x = 0, GaP; and 1 > x > 0, alloys) in a nonthermal plasma. By tuning the reactor conditions, we gain control over the morphology of the final product, producing either 10 nm diameter hollow nanocrystals or smaller 3 nm solid nanocrystals. We observe the gas-phase chemistry in the plasma reactor using plasma emission spectroscopy to understand the growth mechanism of the hollow versus solid morphology. We also connect this plasma chemistry to the subsequent native surface chemistry of the nanocrystals, which is dominated by the presence of both dative- and lattice-bound phosphine species. The dative phosphines react readily with oleylamine in an L-type ligand exchange reaction, evolving phosphines and allowing the particles to be dispersed in nonpolar solvents. Subsequent treatment by HF causes the solid InP1.5 and In0.5Ga0.5P1.3 to become photoluminescent, whereas the hollow particles remain nonemissive.},

  doi          = {10.1021/acs.chemmater.8b01358},

  journal      = {Chemistry of Materials},

  number       = 9,

  volume       = 30,

  place        = {United States},

  year         = {Mon Apr 09 00:00:00 EDT 2018},

  month        = {Mon Apr 09 00:00:00 EDT 2018}

}

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Title: Morphological Control of InxGa1–xP Nanocrystals Synthesized in a Nonthermal Plasma

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Title: Morphological Control of In_xGa_1–xP Nanocrystals Synthesized in a Nonthermal Plasma