Ion beam induced amorphization and bond breaking in Zn2SiO4:Eu3+ nanocrystalline phosphor.
This paper reports on the ionoluminescence (IL) of Zn(2)SiO(4):Eu(3+) nanophosphors bombarded with 100 MeV Si(7+) ions with fluences in the range (3.91-21.48)×10(12) ions cm(-2). The prominent IL emission peaks recorded at 580, 590, 612, 650 and 705 nm are attributed to the luminescence centers activated by Eu(3+) ions. It is observed that IL intensity decreases and saturates with increase of Si(7+) ion fluence. Fourier transform infrared (FT-IR) studies confirm surface/bulk amorphization for a fluence of (3.91-21.48)×10(13) ions cm(-2). These results show degradation of SiO (2ν(3)) bonds present on the surface of the sample and/or due to lattice disorder produced by dense electronic excitation under heavy ion irradiation. These results are discussed in detail.
Prof. CNR Rao Centre for Nano Research, Tumkur University, Tumkur, India.
D V
DV
Sunitha
H
H
Nagabhushana
Fouran
F
Singh
S C
SC
Sharma
N
N
Dhananjaya
B M
BM
Nagabhushana
R P S
RP
Chakradhar
D003460:Crystallization; D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D008163:Luminescent Measurements; D053758:Nanoparticles; D010758:Phosphorus / Q000737:chemistry*; D010777:Photochemistry; D033362:Powder Diffraction; D017640:Silicates / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction; D017967:Zinc Compounds / Q000737:chemistry*
D017640:Silicates; D017967:Zinc Compounds; D010758:Phosphorus; D005063:Europium; C029500:zinc silicate