Optoelectronic properties of β-Fe2O3 hollow nanoparticles

被引：26

作者：

Lee, Chang-Woo ^{[1
]}

Lee, Ki-Woo ^{[1
]}

Lee, Jai-Sung ^{[1
]}

机构：

[1] Hanyang Univ, Dept Mat Engn, Ansan 426791, South Korea

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 17-18期

关键词：

hollow nanostructure; nanomaterials; beta-Fe2O3; band gap energy; surfaces; light reflection;

D O I：

10.1016/j.matlet.2008.01.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of hollow structure on the optoelectronic properties of beta-Fe2O3 hollow nanoparticles (HNPs) was determined. Spectrophotometry showed that the optical transmittance of the beta-Fe2O3 HNPs was less than 40% in the visible-light region. This opaqueness was suggested to be an optical characteristic, commonly found in the authors' previous studies of TiO2 and delta-Al2O3 HNPs. In addition, beta-Fe2O3 HNPs had a band gap (1.86 eV) between amorphous (1.73 eV) and polycrystalline (1.97 eV) beta-Fe2O3 thin films, which was a 5-7 nm thick shell that embraced an intermediate volume of the crystal phase, in-between the two thin films. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：2664 / 2666

页数：3

共 16 条

[1] Optical properties of crystalline and non-crystalline iron oxide thin films deposited by spray pyrolysis
Akl, AA
[J]. APPLIED SURFACE SCIENCE, 2004, 233 (1-4) : 307 - 319
[2] Band-gap energies of sol-gel-derived SrTiO3 thin films
Bao, DH
Yao, X
Wakiya, N
Shinozaki, K
Mizutani, N
[J]. APPLIED PHYSICS LETTERS, 2001, 79 (23) : 3767 - 3769
[3] Optical properties of γ-Fe2O3 nanoparticles dispersed on sol-gel silica spheres
Chakrabarti, S
Ganguli, D
Chaudhuri, S
[J]. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2004, 24 (3-4) : 333 - 342
[4] Physico-chemical, optical and electrochemical properties of iron oxide thin films prepared by spray pyrolysis
Dghoughi, L.
Elidrissi, B.
Bernede, C.
Addou, A.
Lamrani, M. Alaoui
Regragui, A.
Erguig, H.
[J]. APPLIED SURFACE SCIENCE, 2006, 253 (04) : 1823 - 1829
[5] Surface properties of nanosize hollow silica particles on the molecular level
Fuji, Masayoshi
Takai, Chika
Tarutani, Yoshie
Takei, Takashi
Takahashi, Minoru
[J]. ADVANCED POWDER TECHNOLOGY, 2007, 18 (01) : 81 - 91
[6] *JCPDS ICDD, 1997, 390238 JCPDSICDD
[7] Synthesis of metal oxide hollow nanoparticles by chemical vapor condensation process
Lee, C. W.
Kim, S. G.
Lee, J. S.
[J]. SCIENCE OF ENGINEERING CERAMICS III, 2006, 317-318 : 219 - 222
[8] Phase transfonnation of β-Fe2O3 hollow nanoparticles
Lee, Chang-Woo
Jung, Sung-Soo
Lee, Jai-Sung
[J]. MATERIALS LETTERS, 2008, 62 (4-5) : 561 - 563
[9] Formation of TiO2 hollow nanoparticles via gas phase synthesis using titanium oxide acetylacetonate as a precursor
Lee, Chang-Woo
Lee, Jai-Sung
[J]. JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 2006, 114 (1335) : 923 - 928
[10] LEE CW, 2007, Z MET KD, V98, P21

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