TY - JOUR
T1 - Characteristics of nanoparticles formed during pulsed laser ablation of SrBi2Ta2O9
AU - Seol, Kwang Soo
AU - Takeuchi, Kazuo
AU - Miyagawa, Takeshi
AU - Ohki, Yoshimichi
PY - 2002/9
Y1 - 2002/9
N2 - Particle formation was investigated during laser ablation of strontium bismuth tantalate (SBT) with a background of pure oxygen (O2). For an O2 pressure, PO2, varying from 210 to 1300Pa, the mean particle size ranged from 9 to 22nm, and the particle concentration ranged from about 1012 to 108 cm-3. For PO2 = 210 Pa, the particle size ranged from 5 to 30 nm, and for PO2 = 1300 Pa, the particle size ranged from 10 to 80 nm. Transmission electron microscopy measurement of particles sizeclassified at 10 and 20 nm showed that some particles were spherical and others were irregularly shaped. Electron diffraction of the particles showed that the spherical particles were partially crystallized whereas the irregularly shaped particles were amorphous. The formation of these two different morphologies is attributed to different particle cooling rates stemming from spatially nonuniform gas temperatures induced by laser ablation. Regardless of their shape, the particles were composed of strontium, bismuth, tantalum, and oxygen.
AB - Particle formation was investigated during laser ablation of strontium bismuth tantalate (SBT) with a background of pure oxygen (O2). For an O2 pressure, PO2, varying from 210 to 1300Pa, the mean particle size ranged from 9 to 22nm, and the particle concentration ranged from about 1012 to 108 cm-3. For PO2 = 210 Pa, the particle size ranged from 5 to 30 nm, and for PO2 = 1300 Pa, the particle size ranged from 10 to 80 nm. Transmission electron microscopy measurement of particles sizeclassified at 10 and 20 nm showed that some particles were spherical and others were irregularly shaped. Electron diffraction of the particles showed that the spherical particles were partially crystallized whereas the irregularly shaped particles were amorphous. The formation of these two different morphologies is attributed to different particle cooling rates stemming from spatially nonuniform gas temperatures induced by laser ablation. Regardless of their shape, the particles were composed of strontium, bismuth, tantalum, and oxygen.
KW - Laser ablation
KW - Morphology
KW - Nanoparticles
KW - Size distribution
KW - SrBiTaO
KW - Structure
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U2 - 10.1143/jjap.41.5654
DO - 10.1143/jjap.41.5654
M3 - Article
AN - SCOPUS:0036759076
VL - 41
SP - 5654
EP - 5658
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 9
ER -