A simple self-assembly method for colloidal photonic crystals with a large area

Deng, Jian; Tao, Xiaoming; Li, Pei; Xue, Pu; Zhang, Yihe; Sun, Xin; Kwan, Kai Cheong

doi:10.1016/j.jcis.2005.01.025

Cited by 19 publications

(11 citation statements)

References 38 publications

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“…Scalable pattern fabrication techniques see colloidal heteroepitaxy [34] as a subtractive "gold standard" for micro-optical components; additive methods include two-photon polymerization, [35][36][37] spray deposition [38] or colloidal deposition from the liquid phase. [4,25,[39][40][41][42] In particular, for colloidal nanospheres, vertical deposition, [4,25] convective self-assembly, [39] or multilayer colloidal nanoparticle floating, [40][41][42] have been realized. In parallel, inkjet printing emerged as a direct-write approach.…”

Section: Motivationmentioning

confidence: 99%

Disorder explains dual‐band reflection spectrum in spherical colloidal photonic supraparticle assemblies

et al. 2021

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Spherical colloidal photonic supraparticle systems or assemblies (SCAs) are investigated as a model system for confined optical and photonic components. Simulations of the reflection spectrum to calculate their photonic and optical properties for different parameter constellations are compared with experimental studies by microreflectance spectroscopy (𝜇RS) on SCAs fabricated by inkjet in-flight deposition, proving the existence of a dual-band reflection spectrum originating from the supraparticle system. Finite-difference time-domain (FDTD) calculations are employed to verify these findings as a function of structural parameters. Both, theory and experiment, show a double reflection peak for the SCAs and agree well in the variation of position and shape, scaling clearly with the packing density of the SCAs. Reducing this parameter from 0.6 to 0.3, the higher-wavelength reflection maximum decreases in intensity and increases in width but keeps its spectral position. The lower-wavelength reflection maximum decreases in intensity, increases in width and shows a red shift. The results clearly indicate that aspects of disorder decisively contribute to the particular spectral photonic properties of the supraparticle system which are usually related to order in photonic crystals. This finding can stipulate novel, tailor-made nanostructured optical components such as low-dimensional micro resonators and waveguides.

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Section: Motivationmentioning

confidence: 99%

Disorder explains dual‐band reflection spectrum in spherical colloidal photonic supraparticle assemblies

et al. 2021

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“…The interparticle spacing for this crystal was the lattice constant a or the closest distance between two particles in the (111) plane, and it was related to d 111 , the spacing between (111) planes, by d 111 = (2/3) 1/2 a. The periodic lattice of a colloid crystal diffracts light according to the Bragg equation [27][28][29],…”

Section: Fabrication Of Cds/pe 3 /Ps and Zns/pe 3 /Ps Composite Arraymentioning

confidence: 99%

In situ synthesis of sulfide-coated polystyrene composites for the fabrication of photonic crystals

Jin

Zhu

Yang

et al. 2006

Journal of Colloid and Interface Science

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“…1,2 Such behavior always results in two/three-dimensional ordered structures which are named colloidal crystal arrays. For their potential applications in the optical field, [3][4][5][6][7][8][9][10][11][12][13] macroporous materials, [14][15][16][17] separation technology, 18 lithography [19][20][21][22] and solar cells, 23,24 several approaches such as gravity sedimentation, 25,26 solvent evaporation, [27][28][29][30] physical confinement, 31,32 membrane filtration, 33 template directed synthesis [34][35][36][37][38][39] and the LB method 40 have been developed to prepare colloidal crystal arrays. These colloidal crystal arrays are identified by their highly ordered structures and low-cost production.…”

Section: Introductionmentioning

confidence: 99%

Colloidosomes constructed by the seamless connection of nanoparticles: a mobile and recyclable strategy to intelligent capsules

Yuan¹,

Xu²,

Jiang³

et al. 2011

Soft Matter

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Colloidosomes constructed by the self-assembly of nanoparticles (NPs) on liquid-liquid interfaces have been demonstrated to be useful in many fields. However, the interspaces between NPs on the surface of colloidosomes barricade their application in small molecule encapsulation. Herein, fabrication of a new type of colloidosome built by the seamless connection of NPs via simply heating and quenching a type of core-shell structured NPs (CSNPs) aqueous system using oil as a template, is presented. These colloidosomes have a hollow structure and exhibit efficient small molecule encapsulation. More importantly, the colloidosomes can dissociate into single NPs and release the small target molecules encapsulated in interior of the colloidosomes at a temperature higher than the melting point of the CSNP shell. It is also shown that the dissociation temperature of colloidosomes can be controlled by simply adjusting the length of the PEG chains in the CSNP shell, which implies that these intelligent capsules have attractive application prospects in controlled drug release.National Natural Science Foundation of China[50873082, 30700020]; Research Fund for the Doctoral Program of Higher Education[20070384047]; Scientific and Technical Project of Fujian Province of China[2009J1009, 2010H6021, 2010J01306

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A simple self-assembly method for colloidal photonic crystals with a large area

Cited by 19 publications

References 38 publications

Disorder explains dual‐band reflection spectrum in spherical colloidal photonic supraparticle assemblies

Disorder explains dual‐band reflection spectrum in spherical colloidal photonic supraparticle assemblies

In situ synthesis of sulfide-coated polystyrene composites for the fabrication of photonic crystals

Colloidosomes constructed by the seamless connection of nanoparticles: a mobile and recyclable strategy to intelligent capsules

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