Synthesis of Highly Charged, Monodisperse Polystyrene Colloidal Particles for the Fabrication of Photonic Crystals

Reese, Chad E.; Guerrero, Carol D.; Weissman, Jesse; Lee, Kangtaek; Asher, Sanford A.

doi:10.1006/jcis.2000.7190

Cited by 210 publications

(180 citation statements)

References 61 publications

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“…Negatively charged, colloidal dispersions of polystyrene lattices (PS) were prepared by the method described in the Experimental Section [17]. The size of the PS spheres was characterized using dynamic light scattering (DLS), analytical ultracentrifugation (AUC), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) as shown exemplarily in Fig.…”

Section: Resultsmentioning

confidence: 99%

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The Effect of Centrifugal Force on the Assembly and Crystallization of Binary Colloidal Systems: Towards Structural Gradients

Chen

Cölfen

Polarz

2013

Zeitschrift Für Naturforschung B

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In this study, the effect of centrifugal force on the assembly and crystallization of binary colloidal mixtures is demonstrated. Monolithic pieces have been prepared which are characterized by a structural gradient along the direction of the centrifugal force. For a given number ratio of monodisperse 154 and 300 nm latex spheres, the absolute latex concentration was varied and with it the sedimentation velocity of the individual particle species. For three different concentrations it has been demonstrated that the structure of the binary colloidal assembly obtained after centrifugation is affected significantly. For the largest initial latex absolute concentrations, the structural variation along the packed latex column in the ultracentrifuge tube is minimal, while a decrease in the absolute concentrations leads to crystalline packing in defined regions of the column. The observation of the thermodynamically favored structure resembling NaCl, but also of the aluminum boride AlB 2 analog as well as unordered, glass-like packing depending on the mutual latex concentration under unchanged particle number and size ratio, shows that by centrifugation kinetically favored states can be realized. This result implies that centrifugation of binary latex mixtures is a promising route for investigating the self-organization of binary colloidal systems since the sedimentation velocities of the two particle species are different, and thus the local concentrations and mixing ratios vary continuously also enabling rare packing motifs.

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Section: Resultsmentioning

confidence: 99%

“…Monodisperse, negatively charged polystyrene spheres were synthesized by emulsion polymerization using a jacketed cylindrical reaction vessel, connected to a reflux condenser and a glass stirrer powered by a mechanical device [17]. The vessel also contained a temperature sensor and an Ar/reagent inlet.…”

Section: Synthesis Of Polystyrene Nanoparticlesmentioning

confidence: 99%

The Effect of Centrifugal Force on the Assembly and Crystallization of Binary Colloidal Systems: Towards Structural Gradients

Chen

Cölfen

Polarz

2013

Zeitschrift Für Naturforschung B

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“…Highly charged monodisperse polystyrene colloids were prepared by emulsion polymerization as described elsewhere (30 ). We used either ϳ120 g/L suspensions of 154-nm polystyrene colloidal particles with a polydispersity of 5% or an ϳ50 g/L suspension of 95-nm particles with a polydispersity of 7% (QELS measurements).…”

Section: Preparation Of Ccasmentioning

confidence: 99%

“…The suspensions became iridescent as a result of Bragg diffraction from the CCA on shaking with ion-exchange resin. Each particle may possess as many as 60 000 strong acid groups (30 ).…”

Section: Preparation Of Ccasmentioning

confidence: 99%

Photonic Crystal Glucose-Sensing Material for Noninvasive Monitoring of Glucose in Tear Fluid

et al. 2004

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“…높은 표면전하를 가지는 라텍스는 전기적 반발력에 의 해 규칙적인 삼차원적 입자 배열성과 전기 영동성을 높 이고, 고분자의 큰 굴절률은 광결정의 반사율을 증가시 킨다 [9][10][11][12][13]. 무유화중합은 [14][15][16][17][18] 계면활성제의 첨가없이 이온성 개시제 또는 이온성 공단량체를 [4,9,10,11,[19][20][21][22][23][24] 사용하여 단분산성이 우수하고 높은 표면전하를 갖는 고분자 미립자를 제조하는 방법으로 최근에는 광학 또는 감지기능을 갖는 새로운 콜로이드 광결정 재료 [1][2][3][4][5][6][7] 제조에 사용되고 있다.…”

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Part 1 : Soap-Free Emulsion Copolymerization of Styrene with COPS-I

2014

Adhesion and Interface

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Monodisperse poly[styrene-co-(COPS-I)] latices in the size range of 165∼550nm were successfully prepared by soap-free emulsion polymerization with various polymerization conditions (Styrene, COPS-I, KPS, DVB concentrations and polymerization temperature). In general, the COPS-I and KPS, DVB concentrations and polymerization temperature were closely related to the polymerization rate and the number of particles, molecular weight, and zeta potential. The polymerization rate and zeta potential increased, but molecular weight decreased, with increasing in the number of particles.

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Synthesis of Highly Charged, Monodisperse Polystyrene Colloidal Particles for the Fabrication of Photonic Crystals

Cited by 210 publications

References 61 publications

The Effect of Centrifugal Force on the Assembly and Crystallization of Binary Colloidal Systems: Towards Structural Gradients

The Effect of Centrifugal Force on the Assembly and Crystallization of Binary Colloidal Systems: Towards Structural Gradients

Photonic Crystal Glucose-Sensing Material for Noninvasive Monitoring of Glucose in Tear Fluid

Part 1 : Soap-Free Emulsion Copolymerization of Styrene with COPS-I

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