Prediction of the transparency in the visible range of x-ray absorbing nanocomposites built upon the assembly of LaF_3 or LaPO_4 nanoparticles with poly(methyl methacrylate)
作者： Fady El Haber , Xavier Rocquefelte , Christine Andraud , Bouhalouane Amrani , Stéphane Jobic
关键词: FOIL method 、 Poly(methyl methacrylate) 、 Nanoparticle 、 Visible spectrum 、 Refractive index 、 Nanocomposite 、 Methyl methacrylate 、 Ray 、 Materials science 、 Chemical engineering
摘要: A theoretical multiscale approach combining density functional theory and four-flux calculations based on the radiative transfer is used to prospect optical properties of nanocomposite materials composed inorganic nanoparticles lanthanum-containing compounds (LaF3 or LaPO4) embedded in Poly(methyl methacrylate) (PMMA). This investigation shows that a potential route produce lead-free x-ray shielding screens with high transparency visible range (>70% incident light) may consist incorporating colorless LaF3 LaPO4 spherical particles diameter lower than 6 nm PMMA panel from minimum thickness 3 mm volumetric fraction at least 10%. In terms attenuation, this would lead equivalency 0.1 mm (lead foil).
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Jan W. Stouwdam, Frank C. J. M. van Veggel, Near-infrared Emission of Redispersible Er3+, Nd3+, and Ho3+ Doped LaF3 Nanoparticles Nano Letters. ,vol. 2, pp. 733- 737 ,(2002) , 10.1021/NL025562Q
T. Grzyb, S. Lis, Photoluminescent properties of LaF3:Eu3+ and GdF3:Eu3+ nanoparticles prepared by co-precipitation method Journal of Rare Earths. ,vol. 27, pp. 588- 592 ,(2009) , 10.1016/S1002-0721(08)60294-X
K. Held, V. I. Anisimov, V. Eyert, G. Keller, A. K. McMahan, I. A. Nekrasov, D. Vollhardt, LDA+DMFT Investigations of Transition Metal Oxides and f-Electron Materials Advances in Solid State Physics. ,vol. 43, pp. 267- 286 ,(2003) , 10.1007/978-3-540-44838-9_19
C. M. Gramaccioli, T. V. Segalstad, A uranium- and thorium-rich monazite from a South-Alpine pegmatite at Piona, Italy American Mineralogist. ,vol. 63, pp. 757- 761 ,(1978)
K-H Park, S-J Oh, None, Electron-spectroscopy study of rare-earth trihalides. Physical Review B. ,vol. 48, pp. 14833- 14842 ,(1993) , 10.1103/PHYSREVB.48.14833
John P. Perdew, Kieron Burke, Matthias Ernzerhof, Generalized Gradient Approximation Made Simple Physical Review Letters. ,vol. 77, pp. 3865- 3868 ,(1996) , 10.1103/PHYSREVLETT.77.3865
William E. Vargas, Generalized four-flux radiative transfer model Applied Optics. ,vol. 37, pp. 2615- 2623 ,(1998) , 10.1364/AO.37.002615
Jingfang Zhou, Zhishen Wu, Zhijun Zhang, Weimin Liu, Hongxin Dang, Study on an antiwear and extreme pressure additive of surface coated LaF3 nanoparticles in liquid paraffin Wear. ,vol. 249, pp. 333- 337 ,(2001) , 10.1016/S0043-1648(00)00547-0
Yuqiu Qu, Yi Yu, Xianggui Kong, Yajuan Sun, Qinghui Zeng, Hong Zhang, Role of organic molecules on upconversion luminescence of LaF3 nanoparticles Materials Letters. ,vol. 63, pp. 1285- 1288 ,(2009) , 10.1016/J.MATLET.2009.02.067
Mi Ae Lim, Sang Il Seok, Woon Jin Chung, Suk In Hong, Near infrared luminescence properties of nanohybrid film prepared from LaPO4:Er3+/LaPO4 core/shell nanoparticles and silica-based resin Optical Materials. ,vol. 31, pp. 201- 205 ,(2008) , 10.1016/J.OPTMAT.2008.03.009