Continuous supercritical route for quantum-confined GaN nanoparticles

GaN quantum dots (QDs) are prepared in a one-step continuous process using anhydrous solvents at supercritical conditions (and temperatures below 450 °C) in short residence times, typically less than 25 s. The as-prepared QDs exhibit a strong luminescence in the ultraviolet (λmax ~ 350 nm) in agreement with the synthesis of quantum-confined GaN nanoparticles.

[1]  S. Gorsse,et al.  Synthesis of nanostructured materials in supercritical ammonia: nitrides, metals and oxides , 2004 .

[2]  Young Joon Hong,et al.  Photocatalysis using GaN nanowires. , 2008, ACS nano.

[3]  Muoz,et al.  High-pressure phase of gallium nitride. , 1991, Physical review. B, Condensed matter.

[4]  Cyril Aymonier,et al.  Supercritical microfluidics: Opportunities in flow-through chemistry and materials science , 2012 .

[5]  V. Hessel,et al.  Metallic nanoparticles made in flow and their catalytic applications in organic synthesis , 2013 .

[6]  S. Marre,et al.  Microfluidic synthesis of palladium nanocrystals assisted by supercritical CO2: tailored surface properties for applications in boron chemistry. , 2012, Angewandte Chemie.

[7]  Ruoff,et al.  High-pressure structure of gallium nitride: Wurtzite-to-rocksalt phase transition. , 1993, Physical review. B, Condensed matter.

[8]  M. Manninen,et al.  Electronic structure of quantum dots , 2002 .

[9]  Cyril Aymonier,et al.  Design of functional nanostructured materials using supercritical fluids , 2009 .

[10]  B. K. Gupta,et al.  Facile synthesis and photoluminescence spectroscopy of 3D-triangular GaN nano prism islands. , 2014, Dalton Transactions.

[11]  J. Robertson,et al.  Nitrogen Incorporation into Tetrahedral Hydrogenated Amorphous Carbon , 1999 .

[12]  S. Aloni,et al.  Complete composition tunability of InGaN nanowires using a combinatorial approach. , 2007, Nature materials.

[13]  C. Rao,et al.  Room-temperature gas sensors based on gallium nitride nanoparticles , 2010 .

[14]  R. L. Wells,et al.  Gallium Imide, {Ga(NH)3/2}n, a New Polymeric Precursor for Gallium Nitride Powders , 1996 .

[15]  R. L. Wells,et al.  Preparation of Phase Pure Cubic Gallium Nitride, c-GaN, by Ammonothermal Conversion of Gallium Imide, {Ga(NH)3/2}n , 2002 .

[16]  A. Hector.  Materials synthesis using oxide free sol-gel systems. , 2007, Chemical Society reviews.

[17]  Yi Xie,et al.  A Benzene-Thermal Synthetic Route to Nanocrystalline GaN , 1996, Science.

[18]  H. Morkoç,et al.  Large‐band‐gap SiC, III‐V nitride, and II‐VI ZnSe‐based semiconductor device technologies , 1994 .

[19]  Joshua M. Pearce,et al.  Progress in Indium Gallium Nitride Materials for Solar Photovoltaic Energy Conversion , 2013, Metallurgical and Materials Transactions A.

[20]  Guiquan Pan,et al.  New Pyrolysis Route to GaN Quantum Dots , 2006 .

[21]  Cyril Aymonier,et al.  Synthesis of exciton luminescent ZnO nanocrystals using continuous supercritical microfluidics. , 2011, Angewandte Chemie.

[22]  Guangyin Fan,et al.  Solution-based synthesis of III–V quantum dots and their applications in gas sensing and bio-imaging , 2014 .

[23]  S. Denbaars,et al.  High Brightness Blue InGaN/GaN Light Emitting Diode on Nonpolar m-plane Bulk GaN Substrate , 2007 .

[24]  Manijeh Razeghi,et al.  Semiconductor ultraviolet detectors , 1996 .

[25]  Kazuhiko Maeda,et al.  GaN:ZnO solid solution as a photocatalyst for visible-light-driven overall water splitting. , 2005, Journal of the American Chemical Society.

[26]  E. G. Gillan,et al.  Low-temperature solvothermal synthesis of nanocrystalline indium nitride and Ga–In–N composites from the decomposition of metal azides , 2006 .

[27]  R. Fischer,et al.  Solution Synthesis of Colloidal Gallium Nitride at Unprecedented Low Temperatures , 2000 .

[28]  H. Morkoç,et al.  Luminescence properties of defects in GaN , 2005 .

[29]  K. Jensen,et al.  Synthesis of micro and nanostructures in microfluidic systems. , 2010, Chemical Society reviews.

[30]  D. Gerthsen,et al.  Quantum-confined GaN nanoparticles synthesized via liquid-ammonia-in-oil-microemulsions. , 2014, Chemical communications.

[31]  Takashi Mukai,et al.  High-Power GaN P-N Junction Blue-Light-Emitting Diodes , 1991 .

[32]  Klavs F. Jensen,et al.  Supercritical Continuous‐Microflow Synthesis of Narrow Size Distribution Quantum Dots , 2008 .

[33]  D. Bour,et al.  Nitride-based semiconductors for blue and green light-emitting devices , 1997, Nature.

[34]  Arthur J. Nozik,et al.  Synthesis, structure, and optical properties of colloidal GaN quantum dots , 1999 .

[35]  Shuming Nie,et al.  Semiconductor nanocrystals: structure, properties, and band gap engineering. , 2010, Accounts of chemical research.

[36]  M. Bawendi,et al.  (CdSe)ZnS Core-Shell Quantum Dots - Synthesis and Characterization of a Size Series of Highly Luminescent Nanocrystallites , 1997 .

[37]  V. Rotello,et al.  Continuous synthesis of high quality CdSe quantum dots in supercritical fluids , 2015 .

[38]  Exciton Spectra of Cubic and Hexagonal GaN Epitaxial Films , 1997 .

[39]  S. Turner,et al.  GaN@ZIF-8: selective formation of gallium nitride quantum dots inside a zinc methylimidazolate framework. , 2011, Journal of the American Chemical Society.