Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-29T13:05:30.041Z Has data issue: false hasContentIssue false
  • English
  • Français

Plasmon-band subpeak and oxidation of solar-control LaB6 nanoparticles

Published online by Cambridge University Press:  13 July 2016

Keisuke Machida ,
Mika Okada ,
Satoshi Yoshio  and
Kenji Adachi
Keisuke Machida
Affiliation:
Ichikawa Research Center, Sumitomo Metal Mining Co., Ltd., Ichikawa, Chiba272-8588, Japan
Mika Okada
Affiliation:
Ink Materials Department, Ohkuchi Electronics Co., Ltd., Isa, Kagoshima895-2501, Japan
Satoshi Yoshio
Affiliation:
Department of Computer-Aided Engineering and Development, Sumitomo Metal Mining Co., Ltd., Minato-ku, Tokyo105-8716, Japan
Kenji Adachi*
Affiliation:
Ichikawa Research Center, Sumitomo Metal Mining Co., Ltd., Ichikawa, Chiba272-8588, Japan
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

Near-infrared (NIR) absorption in solar-control LaB6 nanoparticles (NPs) is derived from the localized surface plasmon resonance (LSPR) at 1.3 eV, and accompanies an unclarified subpeak at 1.8 eV. As an origin of this subpeak, a disk-like particle shape of LaB6 NP has recently been proposed, besides the previously-proposed, milling-derived LaO phase. A series of heating experiments at 200–850 °C in air for LaB6 NPs pulverized with different media beads have been made, followed by x-ray diffraction and transmission electron microscopy observations, to clarify that LaB6 NPs oxidizes to amorphous phases B2O3 and La–B–O at 450–600 °C, and crystallize to LaB3O6 at 650–750 °C, without forming LaO or La2O3. Dielectric functions of LaO have been derived by first-principles calculations using sX-LDA, and Mie scattering calculations have been made for various sizes, shapes, and the ensembles, showing that LaO NPs, if existed, should exhibit an excessively-broadened absorption band with a blunt LSPR peak at 2.1 eV buried in several interband-transition absorptions at 1.2–4.0 eV. These analyses confirm that the observed 1.8 eV subpeak could not originate from LaO and support the nonspherical shape of NPs as the origin of the subpeak.

Keywords

lanthanum hexaborideoxidationLaOplasmon bandfirst-principles study
Type
Focus Section: Reinventing Boron Chemistry and Materials for the 21st Century
Information
Journal of Materials Research , Volume 31 , Issue 18: Focus Section: Reinventing Boron Chemistry for the 21st Century , 28 September 2016 , pp. 2780 - 2788
Check for updates
Copyright
Copyright © Materials Research Society 2016 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Trenary, M.: Surface science studies of metal hexaborides. Sci. Technol. Adv. Mater. 13, 023002 (2012).Google Scholar
Takeda, H., Kuno, H., and Adachi, K.: Film for cutting off heat-rays and a coating liquid for forming the same. US Patents 6060154, May 9, 2000; 6277187, August 21, 2001; and 6221945, April 24, 2001.Google Scholar
Takeda, H., Kuno, H., and Adachi, K.: Solar control dispersions and coatings with rare-earth hexaboride nanoparticles. J. Am. Ceram. Soc. 91, 2897 (2008).CrossRefGoogle Scholar
Fisher, W.K.: Polyvinylbutyral blends with lanthanum hexaboride for use in laminated solar control glazing. In Proc. Glass Processing Days 2005, Tampere, June 17–20, 2005; p. 110.Google Scholar
Adachi, K., Miratsu, M., and Asahi, T.: Absorption and scattering of near-infrared light by dispersed lanthanum hexaboride nanoparticles for solar control filters. J. Mater. Res. 25(3), 510 (2010).Google Scholar
Yuan, Y.F., Zhang, L., Hu, L.J., Wang, W., and Min, G.H.: Size effect of added LaB6 particles on optical properties of LaB6/polymer composites. J. Solid State Chem. 184, 3364 (2011).CrossRefGoogle Scholar
Jiang, F., Leong, Y.K., Saunders, M., Martyniuk, M., Faraone, L., Keating, A., and Dell, J.M.: Uniform dispersion of lanthanum hexaboride nanoparticles in a silica thin film: Synthesis and optical properties. ACS Appl. Mater. Interfaces 4(11), 5833 (2012).CrossRefGoogle Scholar
Tang, H., Su, Y., Tan, J., Hu, T., Gong, J., and Xiao, L.: Optical properties and thermal stability of poly(vinyl butyral) thin films embedded with LaB6@SiO2 core-shell nanoparticles. Superlattices Microstruct. 75, 908 (2014).Google Scholar
Chen, C-J. and Chen, D-H.: Preparation of LaB6 nanoparticles as a novel and effective near-infrared photothermal conversion material. Chem. Eng. J. 180, 337 (2012).CrossRefGoogle Scholar
Lai, B-H. and Chen, D-H.: LaB6 nanoparticles with carbon-doped silica coating for fluorescence imaging and near-IR photothermal therapy of cancer cells. Acta Biomater. 9(7), 7556 (2013).Google Scholar
Yoshio, S., Maki, K., and Adachi, K.: Optical properties of group-3 metal hexaboride nanoparticles by first-principles calculations. J. Chem. Phys. 144, 234702 (2016).CrossRefGoogle ScholarPubMed
Kauer, E.: Optical and electrical properties of LaB6 . Phys. Lett. 7, 171 (1963).CrossRefGoogle Scholar
Kimura, S., Nanba, T., Tomikawa, M., Kunii, S., and Kasuya, T.: Electronic structure of rare-earth hexaborides. Phys. Rev. B: Condens. Matter Mater. Phys. 46, 12196 (1992).Google Scholar
Kimura, S., Nanba, T., Kunii, S., and Kasuya, T.: Low-energy optical excitation in rare-earth hexaborides. Phys. Rev. B: Condens. Matter Mater. Phys. 50, 1406 (1994).Google Scholar
Leger, J.M., Aimonio, P., Loriers, J., Dordor, P., and Coqblin, B.: Transport properties of SmO. Phys. Lett. 80A, 325 (1980).Google Scholar
Machida, K. and Adachi, K.: Particle shape inhomogeneity and plasmon band broadening of solar-control LaB6 nanoparticles. J. Appl. Phys. 118, 013103 (2015).Google Scholar
Kresse, G. and Furthmüller, J.: Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set. Comput. Mater. Sci. 6, 15 (1996).CrossRefGoogle Scholar
Kresse, G. and Furthmüller, J.: Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set. Phys. Rev. B: Condens. Matter Mater. Phys. 54, 11169 (1996).CrossRefGoogle ScholarPubMed
Kresse, G. and Joubert, D.: From ultrasoft pseudopotentials to the projector augmented-wave method. Phys. Rev. B: Condens. Matter Mater. Phys. 59, 1758 (1999).Google Scholar
Perdew, J.P., Burke, K., and Ernzerhof, M.: Generalized gradient approximation made simple. Phys. Rev. Lett. 77, 3865 (1996).CrossRefGoogle ScholarPubMed
Bylander, D.M. and Kleinman, L.: Good semiconductor band gaps with a modified local-density approximation. Phys. Rev. B: Condens. Matter Mater. Phys. 41, 7868 (1990).Google Scholar
Seidl, A., Görling, A., Vogl, P., Majewski, J.A., and Levy, M.: Generalized Kohn-Sham schemes and the band-gap problem. Phys. Rev. B: Condens. Matter Mater. Phys. 53, 3764 (1996).Google Scholar
Bohren, C.F. and Huffman, D.R.: Absorption and Scattering of Light by Small Particles (Wiley Interscience, New York, 1983).Google Scholar
Ji, X.H., Zhang, Q.Y., Xu, J.Q., and Zhao, Y.M.: Rare-earth hexaborides nanostructures: Recent advances in materials, characterization and investigations of physical properties. Prog. Solid State Chem. 39, 51 (2011).CrossRefGoogle Scholar
Mattox, T.M., Agrawal, A., and Milliron, D.J.: Low temperature synthesis and surface plasmon resonance of colloidal lanthanum hexaboride (LaB6) Nanocrystals. Chem. Mater. 27(19), 6620 (2015).Google Scholar
Samsonov, G.: Handbook of Refractory Compounds (Springer US, IFI/Plenum, New York, 1980).Google Scholar
Levin, E.M., Robbins, C.R., and Waring, J.L.: Immiscibility and the system lanthanum oxide-boric oxide. J. Am. Ceram. Soc. 44(2), 89 (1961).Google Scholar
Wen, C.H., Wu, T.M., and Wu, W.C.J.: Oxidation kinetics of LaB6 in oxygen rich conditions. J. Eur. Ceram. Soc. 24, 3235 (2004).Google Scholar
Sonber, J.K., Sairam, K., Murthy, T.S.R.Ch., Nagaraj, A., Subramanian, C., and Hubli, R.C.: Synthesis, densification and oxidation study of lanthanum hexaboride. J. Eur. Ceram. Soc. 34(5), 1155 (2014).CrossRefGoogle Scholar
Leger, J.M., Yacoubi, N., and Loriers, J.: Synthesis of rare earth monoxides. J. Solid State Chem. 36, 261 (1981).CrossRefGoogle Scholar