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Spectral reflectance switching of colloidal photonic crystal structure composed of positively charged TiO2 nanoparticles
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10.1063/1.3680589
/content/aip/journal/apl/100/6/10.1063/1.3680589
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/6/10.1063/1.3680589
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Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) A schematic view of positively charged TiO2 nanoparticle; (b) Particle size distribution and TEM image (inset) of the synthesized TiO2 nanoparticles; (c) SEM images of the colloidal layers after drying. Left one is formed by colloidal solution dropping on the glass in the air and the right one is formed on electrode surface in the test cell after applying voltage.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Reflectance spectra of TiO2 photonic crystal and the intensity tuning by applying external electric field; (b) A graph illustrates the simulation results about distance changing trend between particles and electrode by moving of charged particles for z-coordinate projection along time under certain external electric field; (c) A series of spectra recorded during switching between negative and positive potential.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Accumulated charges (thick, red line) and peak intensities (thin, blue line) vs time, respectively, during switching between +3 V and −3 V; (b) The increasing form (up) and decreasing form (down) of the corresponding charge changes and the peak intensity changes with number of cycles; (c) Peak intensity switching behaviors under several different electric fields.

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/content/aip/journal/apl/100/6/10.1063/1.3680589
2012-02-08
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spectral reflectance switching of colloidal photonic crystal structure composed of positively charged TiO2 nanoparticles
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/6/10.1063/1.3680589
10.1063/1.3680589
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