Three-Dimensional Colloidal Crystal Arrays Exhibiting Stop Band in Near-Infrared Region

被引：17

作者：

Agrawal, Mukesh ^{[1
]}

Fischer, Dieter ^{[1
]}

Gupta, Smrati ^{[1
]}

Zafeiropoulos, Nikolaos E. ^{[1
]}

Pich, Andrij ^{[3
]}

Lidorikis, Elefterios ^{[2
]}

Stamm, Manfred ^{[1
]}

机构：

[1] Leibniz Inst Polymerfosch Dresden eV, D-01069 Dresden, Germany

[2] Univ Ioannina, Dept Mat Sci & Engn, GR-45110 Ioannina, Greece

[3] Tech Univ Dresden, Inst Makromol Chem, D-01062 Dresden, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 39期

关键词：

TAILORED SHELL THICKNESS; PHOTONIC CRYSTALS; OPTICAL-PROPERTIES; QUANTUM DOTS; AIR SPHERES; PARTICLES; LOCALIZATION; WAVELENGTHS; FABRICATION; TITANIA;

D O I：

10.1021/jp106961w

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report on the fabrication of three-dimensional colloidal crystal arrays (CCAs) on an underlying substrate via gravity sedimentation of TiO(2)-coated polystyrene (PS) colloidal particles. The beauty of the described system lies in the fact that, obtained CCAs, for the first time, display a photonic band gap in the near-infrared (NIR) region with as much bandwidth (Delta lambda/lambda) as 54-61%. Interestingly, stop band position and bandwidth have been found to be modulated with structural parameters of building blocks such as particle size and thickness of TiO(2) shell, etc. Moreover, no significant change in stop band position was observed with the variation in incidence angle of the light. Theoretical calculations from the simulation studies have been found in agreement with the experimental findings.

引用

页码：16389 / 16394

页数：6

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