Abstract
PbWO4 crystals with various morphologies were fabricated via a facile poly(methacrylic acid)-mediated hydrothermal route. Novel microsized PbWO4 single crystals with a needle-like shape as well as other morphologies, such as a fishbone, dendrite, sphere, spindle, ellipsoid, rod, and dumbbell with two dandelion-like heads, could be produced. The presence of PMAA, [Pb2+]/[WO4 2-] molar ratio (R), and aging temperature played key roles in the formation of the PbWO4 needle-like structures. Between temperatures of 60 to 150 °C, the length and photoluminescence intensities of the PbWO4 micro needles significantly increased with aging temperature, while the diameter did not change remarkably. Time-dependent experiments revealed that the formation of PbWO4 microneedles involved an unusual growth process, involving nucleation, oriented assembly and controlled mesoscale restructuring of nanoparticle building blocks.
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42.70.-a; 81.10.Dn; 81.10.Aj; 81.10.-h; 81.05.Zx; 81.16.Dn
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Yu, J., Zhao, X., Liu, S. et al. Poly(methacrylic acid)-mediated morphosynthesis of PbWO4 micro-crystals. Appl. Phys. A 87, 113–120 (2007). https://doi.org/10.1007/s00339-006-3850-3
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DOI: https://doi.org/10.1007/s00339-006-3850-3