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New Class of Polymer Materials-Quasi-Nematic Colloidal Particle Self-Assemblies: The Case of Assemblies of Prolate Spheroidal Poly(Styrene/Polyglycidol) Particles. Polymers (Basel) 2022; 14:polym14224859. [PMID: 36432985 PMCID: PMC9698966 DOI: 10.3390/polym14224859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/25/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022] Open
Abstract
Assemblies of colloidal polymer particles find various applications in many advanced technologies. However, for every type of application, assemblies with properly tailored properties are needed. Until now, attention has been concentrated on the assemblies composed of spherical particles arranged into so-called perfect colloidal crystals and on complex materials containing mixtures of crystal and disordered phases. However, new opportunities are opened by using assemblies of spheroidal particles. In such assemblies, the particles, in addition to the three positional have three angular degrees of freedom. Here, the preparation of 3D assemblies of reference microspheres and prolate spheroidal poly(styrene/polyglycidol) microparticles by deposition from water and water/ethanol media on silicon substrates is reported. The particles have the same polystyrene/polyglycidol composition and the same volumes but differ with respect to their aspect ratio (AR) ranged from 1 to 8.5. SEM microphotographs reveal that particles in the assembly top layers are arranged into the quasi-nematic structures and that the quality of their orientation in the same direction increase with increasing AR. Nano- and microindentation studies demonstrate that interactions of sharp and flat tips with arrays of spheroidal particles lead to different types of particle deformations.
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2
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Liu T, Liu T, Gao F, Glotzer SC, Solomon MJ. Structural Color Spectral Response of Dense Structures of Discoidal Particles Generated by Evaporative Assembly. J Phys Chem B 2022; 126:1315-1324. [PMID: 35112869 DOI: 10.1021/acs.jpcb.1c10015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Structural color─optical response due to light diffraction or scattering from submicrometer-scale structures─is a promising means for sustainable coloration. To expand the functionality of structural color, we introduce discoidal shape anisotropy into colloidal particles and characterize how structural color reflection can be engineered. Uniaxial compression of spheres is used to prepare discoids with varying shape anisotropy and particle size. Discoids are assembled into thin films by evaporation. We find that structural color of assembled films displays components due to diffuse backscattering and multilayer reflection. As discoids become more anisotropic, the assembled structure is more disordered. The multilayer reflection is suppressed─peak height becomes smaller and peak width broader; thus, the color is predominantly from diffuse backscattering. Finally, the discoid structural color can be tuned by varying particle size and has low dependence on viewing angle. We corroborate our results by comparing experimental microstructures and measured reflection spectra with Monte Carlo simulations and calculated spectra by finite-difference time-domain simulation. Our findings demonstrate that the two tunable geometries of discoids─size and aspect ratio─generate different effects on spectral response and therefore can function as independent design parameters that expand possibilities for producing noniridescent structural color.
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Affiliation(s)
- Tianyu Liu
- Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Tianyu Liu
- Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Fengyi Gao
- Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Sharon C Glotzer
- Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States.,Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States.,Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Michael J Solomon
- Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States.,Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States.,Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
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3
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One-Step microfluidic synthesis of spherical and bullet-like alginate microcapsules with a core–shell structure. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125612] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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4
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Tseng HF, Liang X, Liu CT, Chiu YJ, Li JW, Hsu HH, Chang KC, Nakajima K, Chen JT. Sequential Selective Solvent On-Film Annealing: Fabrication of Monolayers of Ordered Anisotropic Polymer Particles. ACS APPLIED MATERIALS & INTERFACES 2020; 12:35731-35739. [PMID: 32633485 DOI: 10.1021/acsami.0c09870] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Although various strategies have been developed to prepare anisotropic polymeric particles, it remains challenging to fabricate monolayers of anisotropic polymeric particles, which can extend the applications of anisotropic particles. Here, we develop a novel and facile approach to fabricate monolayers of anisotropic polymeric particles. Monolayers of polystyrene (PS) microspheres with a mean diameter of 10 μm are deposited on glass substrates coated with poly(methyl methacrylate) films, followed by sequential selective solvent on-film annealing processes. Monolayers of anisotropic polymeric particles, such as the snowman-like PS particles, are successfully fabricated. Such unique structures possess the long-range ordering of monolayers (the structure factor) and the anisotropic geometry of individual particles (the form factor). The nanomechanical properties of the PS particles are also characterized using atomic force microscopy force volume measurements, showing a decrease in the Young's moduli of the PS particles owing to the looser packing of the polymer chains. This work provides the most facile and versatile strategy by far to fabricate monolayers of ordered anisotropic polymeric particles, which are inaccessible by other traditional means.
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Affiliation(s)
- Hsiao-Fan Tseng
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Xiaobin Liang
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Tokyo 1528552, Japan
| | - Chih-Ting Liu
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yu-Jing Chiu
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
- Sustainable Chemical Science and Technology, Taiwan International Graduate Program (TIGP), National Chiao Tung University and Academia Sinica, Hsinchu 30010, Taiwan
| | - Jia-Wei Li
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Hsun-Hao Hsu
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Kai-Chieh Chang
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Ken Nakajima
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Tokyo 1528552, Japan
| | - Jiun-Tai Chen
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
- Sustainable Chemical Science and Technology, Taiwan International Graduate Program (TIGP), National Chiao Tung University and Academia Sinica, Hsinchu 30010, Taiwan
- Center for Emergent Functional Matter Science (CEFMS), National Chiao Tung University, Hsinchu 30010, Taiwan
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5
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Yu B, Cong H, Peng Q, Gu C, Tang Q, Xu X, Tian C, Zhai F. Current status and future developments in preparation and application of nonspherical polymer particles. Adv Colloid Interface Sci 2018; 256:126-151. [PMID: 29705026 DOI: 10.1016/j.cis.2018.04.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 03/30/2018] [Accepted: 04/14/2018] [Indexed: 11/16/2022]
Abstract
Nonspherical polymer particles (NPPs) are nano/micro-particulates of macromolecules that are anisotropic in shape, and can be designed anisotropic in chemistry. Due to shape and surface anisotropies, NPPs bear many unique structures and fascinating properties which are distinctly different from those of spherical polymer particles (SPPs). In recent years, the research on NPPs has surprisingly blossomed in recent years, and many practical materials based on NPPs with potential applications in photonic device, material science and biomedical engineering have been generated. In this review, we give a systematic, balanced and comprehensive summary of the main aspects of NPPs related to their preparation and application, and propose perspectives for the future developments of NPPs.
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Affiliation(s)
- Bing Yu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China; Laboratory for New Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Hailin Cong
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China; Laboratory for New Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
| | - Qiaohong Peng
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
| | - Chuantao Gu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
| | - Qi Tang
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
| | - Xiaodan Xu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
| | - Chao Tian
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
| | - Feng Zhai
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
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6
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Raoufian E, Eslami H, Darafarin M. Synthesis of spike-ball-like polystyrene/poly(methyl methacrylate) composite particles via seeded polymerization. POLYM INT 2017. [DOI: 10.1002/pi.5462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Ehsan Raoufian
- Amirkabir University of Technology (Tehran Polytechnic), Mahshahr Campus; Mahshahr, Industrial Area Khuzestan Iran
| | - Hormoz Eslami
- Department of Polymer Engineering and Color Technology; Amirkabir University of Technology (Tehran Polytechnic); Tehran Iran
| | - Morteza Darafarin
- Amirkabir University of Technology (Tehran Polytechnic), Mahshahr Campus; Mahshahr, Industrial Area Khuzestan Iran
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Ferrar JA, Pavlovsky L, Viges E, Liu Y, Solomon MJ. Two‐step continuous production of monodisperse colloidal ellipsoids at rates of one gram per day. AIChE J 2017. [DOI: 10.1002/aic.16009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Joseph A. Ferrar
- Dept. of Chemical EngineeringUniversity of MichiganAnn Arbor MI 48109
| | - Leonid Pavlovsky
- Dept. of Chemical EngineeringUniversity of MichiganAnn Arbor MI 48109
| | - Eric Viges
- Dept. of Chemical EngineeringUniversity of MichiganAnn Arbor MI 48109
| | - Yanliang Liu
- Dept. of Macromolecular Science and EngineeringUniversity of MichiganAnn Arbor MI 48109
| | - Michael J. Solomon
- Dept. of Chemical EngineeringUniversity of MichiganAnn Arbor MI 48109
- Dept. of Macromolecular Science and EngineeringUniversity of MichiganAnn Arbor MI 48109
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8
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Tseng HF, Cheng MH, Li JW, Chen JT. Solvent On-Film Annealing (SOFA): Morphological Evolution of Polymer Particles on Polymer Films via Solvent Vapor Annealing. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00670] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Hsiao-Fan Tseng
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 30010
| | - Ming-Hsiang Cheng
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 30010
| | - Jia-Wei Li
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 30010
| | - Jiun-Tai Chen
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 30010
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9
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Shin JM, Kim Y, Yun H, Yi GR, Kim BJ. Morphological Evolution of Block Copolymer Particles: Effect of Solvent Evaporation Rate on Particle Shape and Morphology. ACS NANO 2017; 11:2133-2142. [PMID: 28165714 DOI: 10.1021/acsnano.6b08342] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Shape and morphology of polymeric particles are of great importance in controlling their optical properties or self-assembly into unusual superstructures. Confinement of block copolymers (BCPs) in evaporative emulsions affords particles with diverse structures, including prolate ellipsoids, onion-like spheres, oblate ellipsoids, and others. Herein, we report that the evaporation rate of solvent from emulsions encapsulating symmetric polystyrene-b-polybutadiene (PS-b-PB) determines the shape and internal nanostructure of micron-sized BCP particles. A distinct morphological transition from the ellipsoids with striped lamellae to the onion-like spheres was observed with decreasing evaporation rate. Experiments and dissipative particle dynamics (DPD) simulations showed that the evaporation rate affected the organization of BCPs at the particle surface, which determined the final shape and internal nanostructure of the particles. Differences in the solvent diffusion rates in PS and PB at rapid evaporation rates induced alignment of both domains perpendicular to the particle surface, resulting in ellipsoids with axial lamellar stripes. Slower evaporation rates provided sufficient time for BCP organization into onion-like structures with PB as the outermost layer, owing to the preferential interaction of PB with the surroundings. BCP molecular weight was found to influence the critical evaporation rate corresponding to the morphological transition from ellipsoid to onion-like particles, as well as the ellipsoid aspect ratio. DPD simulations produced morphologies similar to those obtained from experiments and thus elucidated the mechanism and driving forces responsible for the evaporation-induced assembly of BCPs into particles with well-defined shapes and morphologies.
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Affiliation(s)
| | | | | | - Gi-Ra Yi
- School of Chemical Engineering, Sungkyunkwan University , Suwon 16419, Republic of Korea
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10
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Yu B, Yuan H, Wang D, Cong H, Xu X, Yang S. Fabrication of anisotropic silica hollow microspheres using polymeric protrusion particles as templates. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3269-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Anisotropic colloidal crystal particles from microfluidics. J Colloid Interface Sci 2014; 421:64-70. [DOI: 10.1016/j.jcis.2014.01.041] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 01/20/2014] [Accepted: 01/27/2014] [Indexed: 11/30/2022]
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12
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Emoto A, Noguchi N, Fukuda T. Dichroic reflection in specular direction of Au-coated anisotropic hemispherical structure arrays based on monolayer of subwavelength-scale polystyrene spheres. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.04.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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13
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Jang SG, Audus DJ, Klinger D, Krogstad DV, Kim BJ, Cameron A, Kim SW, Delaney KT, Hur SM, Killops KL, Fredrickson GH, Kramer EJ, Hawker CJ. Striped, Ellipsoidal Particles by Controlled Assembly of Diblock Copolymers. J Am Chem Soc 2013; 135:6649-57. [DOI: 10.1021/ja4019447] [Citation(s) in RCA: 195] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
| | | | | | | | - Bumjoon J. Kim
- Department of Chemical
and Biomolecular
Engineering, Korea Advanced Institute of Science and Technology, Daehon 305-701, Republic of Korea
| | | | | | | | | | - Kato L. Killops
- Edgewood Chemical Biological Center, U.S. Army Research, Development, and Engineering Command, Aberdeen Proving Ground, Maryland 21010, United States
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14
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Ye R, Ye YH, Zhou Z, Xu H. Gravity-assisted convective assembly of centimeter-sized uniform two-dimensional colloidal crystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:1796-1801. [PMID: 23327559 DOI: 10.1021/la3040227] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We have developed an inexpensive, robust, and easily controlled method, a gravity-assisted convective self-assembly method, to fabricate centimeter-sized uniform two-dimensional colloidal crystals. In this method, centimeter-sized two-dimensional colloidal crystals can be formed when the suspension concentration is in the range of 0.32-2.5 wt %. Once the ordering process starts, the formation of two-dimensional colloidal crystals is not affected when the environmental temperature gradually increases from 3 to 10 °C. Experimental results indicate that, in this method, gravity plays an important role in the colloidal crystal formation. The colloidal particles are transported to the edge of the suspension-glass interface, and the extra particles can be eventually moved to the edge of the slide by gravity.
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Affiliation(s)
- Ran Ye
- Department of Physics, Nanjing Normal University, Nanjing 210097, China
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15
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Wang Y, Huang W, Huang L, Zhang S, Hua D, Zhu X. Synthesis of walnut-like polystyrene particles using a “giant” surfactant and its superhydrophobic property. Polym Chem 2013. [DOI: 10.1039/c3py21142h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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16
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Wang F, Liu H, Zhang J, Zhou X, Zhang X. Synthesis of snowman‐like magnetic/nonmagnetic nanocomposite asymmetric particles via seeded emulsion polymerization initiated by γ‐ray radiation. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26274] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Feng‐Wei Wang
- Department of Polymer Science and Engineering, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Hua‐Rong Liu
- Department of Polymer Science and Engineering, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jin‐De Zhang
- Department of Polymer Science and Engineering, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiang‐Tian Zhou
- Department of Polymer Science and Engineering, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xing‐Yuan Zhang
- Department of Polymer Science and Engineering, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
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17
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Herrmann C, Bannwarth MB, Landfester K, Crespy D. Re-dispersible Anisotropic and Structured Nanoparticles: Formation and Their Subsequent Shape Change. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201100644] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Forster JD, Park JG, Mittal M, Noh H, Schreck CF, O'Hern CS, Cao H, Furst EM, Dufresne ER. Assembly of optical-scale dumbbells into dense photonic crystals. ACS NANO 2011; 5:6695-6700. [PMID: 21740047 DOI: 10.1021/nn202227f] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We describe the self-assembly of nonspherical particles into crystals with novel structure and optical properties combining a partial photonic band gap with birefringence that can be modulated by an external field or quenched by solvent evaporation. Specifically, we study symmetric optical-scale polymer dumbbells with an aspect ratio of 1.58. Hard particles with this geometry have been predicted to crystallize in equilibrium at high concentrations. However, unlike spherical particles, which readily crystallize in the bulk, previous experiments have shown that these dumbbells crystallize only under strong confinement. Here, we demonstrate the use of an external electric field to align and assemble the dumbbells to make a birefringent suspension with structural color. When the electric field is turned off, the dumbbells rapidly lose their orientational order and the color and birefringence quickly go away. In this way, dumbbells combine the structural color of photonic crystals with the field addressability of liquid crystals. In addition, we find that if the solvent is removed in the presence of an electric field, the particles self-assemble into a novel, dense crystalline packing hundreds of particles thick. Analysis of the crystal structure indicates that the dumbbells have a packing fraction of 0.7862, higher than the densest known packings of spheres and ellipsoids. We perform numerical experiments to more generally demonstrate the importance of controlling the orientation of anisotropic particles during a concentration quench to achieve long-range order.
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Affiliation(s)
- Jason D Forster
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06520, USA
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19
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Yang Q, Chen J, Wang L, Xu Q, He L. Morphology control and 2D self-assembly of poly(styrene-co-divinylbenzene) capsules. J Colloid Interface Sci 2011; 358:437-43. [DOI: 10.1016/j.jcis.2011.03.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Revised: 03/08/2011] [Accepted: 03/09/2011] [Indexed: 10/18/2022]
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20
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21
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Zhang Y, Wang J, Huang Y, Song Y, Jiang L. Fabrication of functional colloidal photonic crystals based on well-designed latex particles. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10977d] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Yoon J, Lee KJ, Lahann J. Multifunctional polymer particles with distinct compartments. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10673b] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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23
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Lee KJ, Hwang S, Yoon J, Bhaskar S, Park TH, Lahann J. Compartmentalized Photoreactions within Compositionally Anisotropic Janus Microstructures. Macromol Rapid Commun 2010; 32:431-7. [DOI: 10.1002/marc.201000558] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2010] [Revised: 10/04/2010] [Indexed: 11/11/2022]
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24
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Xu L, Li H, Jiang X, Wang J, Li L, Song Y, Jiang L. Synthesis of Amphiphilic Mushroom Cap-shaped Colloidal Particles towards Fabrication of Anisotropic Colloidal Crystals. Macromol Rapid Commun 2010; 31:1422-6. [DOI: 10.1002/marc.201000156] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2010] [Revised: 04/04/2010] [Indexed: 11/06/2022]
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25
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Riley EK, Liddell CM. Confinement-controlled self assembly of colloids with simultaneous isotropic and anisotropic cross-section. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:11648-11656. [PMID: 20560609 DOI: 10.1021/la100361y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The phase behavior of building blocks with mushroom cap-shaped particle morphology is explored under 2D and quasi-2D confinement conditions. Fast confocal microscopy imaging of the particles sedimented in a wedge cell reveals a range of mono- and bilayer structures partially directed by the isotropic and anisotropic profiles of the particle geometry. The sequence of phases tracked with increasing confinement height includes those reported in spheres, in addition to the more complex rotator and orientation-dependent phases observed for a class of short rod-like colloids. In the later case, the major particle axis reorients with respect to the substrate. Closest packing considerations provide rationale for the observed 1Delta (hexagonal)-1Buckled-1Sides (rotator)-2square (square)-2Delta (hexagonal)-2Sides (rotator) structural transitions with height.
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Affiliation(s)
- Erin K Riley
- Department of Materials Science and Engineering, 128 Bard Hall, Cornell University, Ithaca, New York 14853, USA
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26
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Sun J, Tang CJ, Zhan P, Han ZL, Cao ZS, Wang ZL. Fabrication of centimeter-sized single-domain two-dimensional colloidal crystals in a wedge-shaped cell under capillary forces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:7859-7864. [PMID: 20201578 DOI: 10.1021/la9047165] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Self-assembly of colloidal spheres confined within cells of different shapes formed with two slides under capillary forces are studied. It is found that by controlling the shape of the cell the curvature of the drying front can result in a significant effect on the self-organization process. A curved drying front formed within parallel slides is always associated with growth of colloidal crystal structures with a high density of disorder. We demonstrate that single-domain two-dimensional colloidal crystals with centimeter size can be grown under capillary forces under a straight drying front formed in a wedge-shaped cell. These findings are demonstrated by laser diffraction, microscopy imaging methods and off-normal optical transmission measurements. The present growth method should be of importance in expanding colloidal crystal applications in angle-resolved nanosphere lithography, as well as in preparation of high-quality quasi-three-dimensional plasmonic crystals.
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Affiliation(s)
- Jie Sun
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, PR China
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