Mg 2+-doped GaN nanoparticles as blue-light emitters: a method to avoid sintering at high temperatures.
Bright blue-light emission at 410 nm is observed from Mg(2+)-doped GaN nanoparticles prepared by the nitridation of Ga(2)MgO(4) nanoparticles at 950 degrees C. The sintering of these nanoparticles during high-temperature nitridation was prevented by mixing the Ga(2)MgO(4) precursor nanoparticles with La(2)O(3) as an inert matrix before the nitridation process. The Mg(2+)-doped GaN nanoparticles were isolated from the matrix by etching with 10 % nitric acid. The Mg(2+)-doped GaN nanoparticles were characterized by photoluminescence, atomic force microscopy, X-ray diffraction, and IR analyses.
Mahalingam
Venkataramanan
V
Department of Chemistry, University of Victoria, P.O. Box 3065, Victoria, British Columbia, V8W 3V6, Canada.
Sudarsan
Vasanthakumaran
V
Munusamy
Prabhakaran
P
van Veggel
Frank C J M
FC
Wang
Rui
R
Steckl
Andrew J
AJ
Raudsepp
Mati
M
D002413:Cations, Divalent / Q000737:chemistry; D003116:Color; D005708:Gallium / Q000737:chemistry*; D008027:Light; D008274:Magnesium / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D018625:Microscopy, Atomic Force; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014961:X-Ray Diffraction
D002413:Cations, Divalent; C473348:gallium nitride; D005708:Gallium; D008274:Magnesium