+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Radical formation at the gallium nitride nanowire-electrolyte interface by photoactivated charge transfer



Radical formation at the gallium nitride nanowire-electrolyte interface by photoactivated charge transfer



Nanotechnology 24(32): 325701



We investigated the transfer of photogenerated charge carriers from GaN nanowires into a surrounding electrolyte by electron paramagnetic resonance (EPR) and fluorescence spectroscopy. Using 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) as a spin trap we find that the formation of hydroxyl radicals dominates in acidic, neutral and moderately basic environments, while in an electrolyte with a pH of 13.5 the superoxide formation becomes detectable. We explain the two processes considering the redox potentials for radical formation in the electrolyte as well as the positions of the conduction and valence bands. The role of surface band bending and surface states in the semiconductor is discussed.

(PDF emailed within 0-6 h: $19.90)

Accession: 055345851

Download citation: RISBibTeXText

PMID: 23863457

DOI: 10.1088/0957-4484/24/32/325701


Related references

Beta-Gallium Oxide Nanowire Extended Gate Field Effect Transistor pH Sensors Prepared Using Furnace-Oxidized Gallium Nitride Thin Films. Nanoscience and Nanotechnology Letters 6(10): 914-917, 2014

Ambient temperature deposition of gallium nitride/gallium oxynitride from a deep eutectic electrolyte, under potential control. Chemical Communications 52(38): 6407-6410, 2016

Gallium Nitride Nanowire Nanodevices. Nano Letters 2(2): 101-104, 2002

Theory of charge transfer at the high-Tc superconductor/electrolyte interface. Physical Review. B, Condensed Matter 52(13): 9190-9193, 1995

Gallium Nitride-Based Nanowire Radial Heterostructures for Nanophotonics. Nano Letters 4(10): 1975-1979, 2004

Synthesis of aligned gallium nitride nanowire quasi-arrays. Applied Physics A: Materials Science & Processing 71(3): 349-350, 2000

Gallium nitride nanowire based nanogenerators and light-emitting diodes. Acs Nano 6(6): 5687-5692, 2012

Design and analysis of vertical-channel gallium nitride (GaN) junctionless nanowire transistors (JNT). Journal of Nanoscience and Nanotechnology 14(11): 8130-8135, 2015

High-Brightness Light Emitting Diodes Using Dislocation-Free Indium Gallium Nitride/Gallium Nitride Multiquantum-Well Nanorod Arrays. Nano Letters 4(6): 1059-1062, 2004

Nanoscale optical properties of indium gallium nitride/gallium nitride nanodisk-in-rod heterostructures. Acs Nano 9(3): 2868-2875, 2015

A Monolithically Integrated Gallium Nitride Nanowire/Silicon Solar Cell Photocathode for Selective Carbon Dioxide Reduction to Methane. Chemistry 22(26): 8809-8813, 2016

Interplay between π-Bridges and Positions of Branched Alkyl Groups of Unsymmetrical D-A-D-π-A Squaraines in Dye-Sensitized Solar Cells: Mode of Dye Anchoring and the Charge Transfer Process at the TiO 2 /Dye/Electrolyte Interface. Acs Applied Materials and Interfaces 9(38): 32698-32712, 2017

Surface Charge at the Oxide/Electrolyte Interface: Toward Optimization of Electrolyte Composition for Treatment of Aluminum and Magnesium by Plasma Electrolytic Oxidation. Langmuir 32(5): 1405-1409, 2016

What Is the Structure of the Naphthalene-Benzene Heterodimer Radical Cation? Binding Energy, Charge Delocalization, and Unexpected Charge-Transfer Interaction in Stacked Dimer and Trimer Radical Cations. Journal of Physical Chemistry Letters 6(7): 1111-1118, 2015

Oligonuclear gallium nitrogen cage compounds: molecular intermediates on the way from gallium hydrazides to gallium nitride. Inorganic Chemistry 50(1): 325-335, 2010