1
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Liu Q, Liu Y, Shi J, Liu Z, Wang Q, Guo CF. High-Porosity Foam-Based Iontronic Pressure Sensor with Superhigh Sensitivity of 9280 kPa -1. NANO-MICRO LETTERS 2021; 14:21. [PMID: 34882288 PMCID: PMC8660951 DOI: 10.1007/s40820-021-00770-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 11/11/2021] [Indexed: 05/19/2023]
Abstract
Flexible pressure sensors with high sensitivity are desired in the fields of electronic skins, human-machine interfaces, and health monitoring. Employing ionic soft materials with microstructured architectures in the functional layer is an effective way that can enhance the amplitude of capacitance signal due to generated electron double layer and thus improve the sensitivity of capacitive-type pressure sensors. However, the requirement of specific apparatus and the complex fabrication process to build such microstructures lead to high cost and low productivity. Here, we report a simple strategy that uses open-cell polyurethane foams with high porosity as a continuous three-dimensional network skeleton to load with ionic liquid in a one-step soak process, serving as the ionic layer in iontronic pressure sensors. The high porosity (95.4%) of PU-IL composite foam shows a pretty low Young's modulus of 3.4 kPa and good compressibility. A superhigh maximum sensitivity of 9,280 kPa-1 in the pressure regime and a high pressure resolution of 0.125% are observed in this foam-based pressure sensor. The device also exhibits remarkable mechanical stability over 5,000 compression-release or bending-release cycles. Such high porosity of composite structure provides a simple, cost-effective and scalable way to fabricate super sensitive pressure sensor, which has prominent capability in applications of water wave detection, underwater vibration sensing, and mechanical fault monitoring.
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Affiliation(s)
- Qingxian Liu
- School of Astronautics, Harbin Institute of Technology, Harbin, 150001, Heilongjiang, People's Republic of China
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, People's Republic of China
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, People's Republic of China
- Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, People's Republic of China
| | - Yuan Liu
- Department of Physics and TcSUH, University of Houston, Houston, TX, 77204, USA
- , 320 Crescent Village Circle Unit 1413, San Jose, CA, 95134, USA
| | - Junli Shi
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, People's Republic of China
- Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, People's Republic of China
| | - Zhiguang Liu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, People's Republic of China.
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
| | - Quan Wang
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, People's Republic of China.
- Department of Civil and Environmental Engineering, Shantou University, Shantou, 515063, Guangdong, People's Republic of China.
| | - Chuan Fei Guo
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, People's Republic of China.
- Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, People's Republic of China.
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2
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Fajstavrová K, Rimpelová S, Fajstavr D, Švorčík V, Slepička P. PLLA Honeycomb-Like Pattern on Fluorinated Ethylene Propylene as a Substrate for Fibroblast Growth. Polymers (Basel) 2020; 12:polym12112436. [PMID: 33105764 PMCID: PMC7690597 DOI: 10.3390/polym12112436] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/17/2020] [Accepted: 10/20/2020] [Indexed: 11/26/2022] Open
Abstract
In this study, we present the surface patterning of a biopolymer poly(l-lactide) (PLLA) for fibroblast growth enhancement. The patterning is based on a self-organized pore arrangement directly fabricated from a ternary system of a solvent-nonsolvent biopolymer. We successfully created a porous honeycomb-like pattern (HCP) on a thermally resistant polymer—fluorinated ethylene propylene (FEP). An important preparation step for HCP is activation of the substrate in Ar plasma discharge. The polymer activation leads to changes in the surface chemistry, which corresponds to an increase in the substrate surface wettability. The aim of this study was to evaluate the influence of the PLLA concentration in solution on the surface morphology, roughness, wettability, and chemistry, and subsequently, also on fibroblast proliferation. We confirmed that the amount of PLLA in solution significantly affects the material surface properties. The pore size of the prepared layers, the surface wettability, and the surface oxygen content increased with an increasing amount of biopolymer in the coating solution. The optimal amount was 1 g of PLLA, which resulted in the highest number of cells after 6 days from seeding; however, all three biopolymer concentrations exhibited significantly better results compared to pristine FEP. The cytocompatibility tests showed that the HCP promoted the attachment of cell filopodia to the underlying substrate and, thus, significantly improved the cell–material interactions. We prepared a honeycomb biodegradable support for enhanced cell growth, so the surface properties of perfluoroethylenepropylene were significantly enhanced.
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Affiliation(s)
- Klára Fajstavrová
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (K.F.); (D.F.); (V.Š.)
| | - Silvie Rimpelová
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
- Correspondence: (S.R.); (P.S.)
| | - Dominik Fajstavr
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (K.F.); (D.F.); (V.Š.)
| | - Václav Švorčík
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (K.F.); (D.F.); (V.Š.)
| | - Petr Slepička
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (K.F.); (D.F.); (V.Š.)
- Correspondence: (S.R.); (P.S.)
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3
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Faria AMA, Miranda MA, Gonçalves GE, Bianchi RF, Bianchi AGC, Cuba C, Neves BRA, Pinto ES. Partially ordered porous structures on layer‐by‐layer polyaniline/poly(vinyl sulfate sodium) ultrathin films: Easy fabrication of robust submicroscopic patterning. J Appl Polym Sci 2020. [DOI: 10.1002/app.48597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- A. M. A. Faria
- Instituto Federal de Minas Gerais—Campus Ouro Preto 35400‐00 Ouro Preto Minas Gerais Brazil
- Laboratório de Polímeros e Propriedades Eletrônicas de Materiais, Departamento de FísicaUniversidade Federal de Ouro Preto 35400‐000 Ouro Preto Minas Gerais Brazil
| | - M. A. Miranda
- Instituto Federal de Minas Gerais—Campus Ouro Preto 35400‐00 Ouro Preto Minas Gerais Brazil
| | - G. E. Gonçalves
- Instituto Federal de Minas Gerais—Campus Ouro Preto 35400‐00 Ouro Preto Minas Gerais Brazil
| | - R. F. Bianchi
- Laboratório de Polímeros e Propriedades Eletrônicas de Materiais, Departamento de FísicaUniversidade Federal de Ouro Preto 35400‐000 Ouro Preto Minas Gerais Brazil
| | - A. G. C. Bianchi
- Laboratório de Polímeros e Propriedades Eletrônicas de Materiais, Departamento de FísicaUniversidade Federal de Ouro Preto 35400‐000 Ouro Preto Minas Gerais Brazil
| | - C. Cuba
- Laboratório de Polímeros e Propriedades Eletrônicas de Materiais, Departamento de FísicaUniversidade Federal de Ouro Preto 35400‐000 Ouro Preto Minas Gerais Brazil
| | - B. R. A. Neves
- Laboratório de Nanoscopia, Departamento de FísicaUniversidade Federal de Minas Gerais 30123‐970 Belo Horizonte Brazil
| | - E. S. Pinto
- Instituto Federal de Minas Gerais—Campus Ouro Preto 35400‐00 Ouro Preto Minas Gerais Brazil
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4
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Pizarro GDC, Marambio OG, Martin-Trasanco R, Sánchez J, Jeria-Orell M, Oyarzún DP. Microporous hybrid films from amphiphilic copolymers: surface coated with ZnS nanoparticles using the breath figure (BF) methodology. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01091-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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Yeh SC, Wu CH, Huang YC, Lee JY, Jeng RJ. In Search of a Green Process: Polymeric Films with Ordered Arrays via a Water Droplet Technique. Polymers (Basel) 2019; 11:E1473. [PMID: 31505874 PMCID: PMC6780950 DOI: 10.3390/polym11091473] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 09/02/2019] [Accepted: 09/05/2019] [Indexed: 11/23/2022] Open
Abstract
As an efficient technique for the preparation of polymeric hexagonal orderly arrays, the breath figure (BF) process has opened a modern avenue for a bottom-up fabrication method for more than two decades. Through the use of the water vapor condensation on the solution surface, the water droplets will hexagonally pack into ordered arrays, acting as a template for controlling the regular micro patterns of polymeric films. Comparing to the top-down techniques, such as lithography or chemical etching, the use of water vapor as the template provides a simple fabrication process with sustainability. However, using highly hazardous solvents such as chloroform, carbon disulfide (CS2), benzene, dichloromethane, etc., to dissolve polymers might hinder the development toward green processes based on this technique. In this review, we will touch upon the contemporary techniques of the BF process, including its up-to-date applications first. More importantly, the search of greener processes along with less hazardous solvents for the possibility of a more sustainable BF process is the focal point of this review.
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Affiliation(s)
- Shih-Chieh Yeh
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 106, Taiwan.
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan.
| | - Chien-Hsin Wu
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 106, Taiwan.
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan.
| | - Ying-Chih Huang
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 106, Taiwan.
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan.
| | - Jen-Yu Lee
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 106, Taiwan.
| | - Ru-Jong Jeng
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 106, Taiwan.
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan.
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6
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Yin H, Feng Y, Billon L. Directed Self-Assembly in “Breath Figure” Templating of Melamine-Based Amphiphilic Copolymers: Effect of Hydrophilic End-Chain on Honeycomb Film Formation and Wetting. Chemistry 2017; 24:425-433. [DOI: 10.1002/chem.201704369] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Hongyao Yin
- Polymer Research Institute; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P.R. China
- Institut des Sciences Analytiques et de Physico-Chimie pour; l'Environnement et les Matériaux (IPREM); Université de Pau et des Pays de l'Adour (UPPA), CNRS UMR 5254, Hélioparc; 2 avenue Angot 64053 Pau Cedex 9 France
| | - Yujun Feng
- Polymer Research Institute; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P.R. China
| | - Laurent Billon
- Institut des Sciences Analytiques et de Physico-Chimie pour; l'Environnement et les Matériaux (IPREM); Université de Pau et des Pays de l'Adour (UPPA), CNRS UMR 5254, Hélioparc; 2 avenue Angot 64053 Pau Cedex 9 France
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7
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Li Z, Kong Q, Ma X, Zang D, Guan X, Ren X. Dynamic effects and adhesion of water droplet impact on hydrophobic surfaces: bouncing or sticking. NANOSCALE 2017; 9:8249-8255. [PMID: 28585977 DOI: 10.1039/c7nr02906c] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This work reported the dynamic effects of water droplet impact on flat, porous and pincushion structure films of star shaped polyhedral oligomeric silsesquioxane (POSS) fluorinated acrylates, POSS-poly(trifluoroethyl methacrylate)8 (POSS-(PTFEMA)8) and POSS-(poly(trifluoroethyl methacrylate)-b-poly(methyl methacrylate))8 (POSS-(PTFEMA-b-PMMA)8), using the breath figure method. The porous and pincushion structure films with different surface chemical compositions were obtained by controlling the copolymer structure and temperature and by stripping of the surface. The water contact angles on the different films were measured, and the water droplets on the pincushion structure films when reversed at 45°, 90°, 135° and 180° were also studied. It was found that the pincushion structure films revealed a water adhesion ability. Furthermore, the water droplet impact behavior on these films was investigated. The morphology variations of water droplets, spreading diameter of the droplets, energy conversion, restitution coefficient and adhesion force were examined. Finally, the schematic illustration of water droplets under the static and dynamic states in contact with the pincushion and porous structure surfaces was proposed. It is critical to materialize various applications such as microdroplet transportation, soil erosion, spray painting, anti-icing surface and antifouling agents for textiles.
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Affiliation(s)
- Zhiguang Li
- Key Laboratory of Eco-Textiles of Ministry of Education, College of Textiles and Clothing, Jiangnan University, Wuxi 214122, China.
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8
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Male U, Shin BK, Huh DS. Graphene oxide incorporated poly(ε-caprolactone) honeycomb-patterned porous polymer films by the breath figure method. Macromol Res 2017. [DOI: 10.1007/s13233-017-5044-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Daly R, Sader JE, Boland JJ. Taming Self-Organization Dynamics to Dramatically Control Porous Architectures. ACS NANO 2016; 10:3087-3092. [PMID: 26828573 DOI: 10.1021/acsnano.5b06082] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We demonstrate templating of functional materials with unexpected and intricate micro- and nanostructures by controlling the condensation, packing, and evaporation of water droplets on a polymer solution. Spontaneous evaporation of a polymer solution induces cooling of the liquid surface and water microdroplet condensation from the ambient vapor. These droplets pack together and act as a template to imprint an entangled polymer film. This breath figure (BF) phenomenon is an example of self-organization that involves the long-range ordering of droplets. Equilibrium-based analysis provides many insights into contact angles and drop stability of individual drops, but the BF phenomenon remains poorly understood thus far, preventing translation to real applications. Here we investigate the dynamics of this phenomenon to separate out the competing influences and then introduce a modulation scheme to ultimately manipulate the water vapor-liquid equilibrium independently from the solvent evaporation. This approach to BF control provides insights into the mechanism, a rationale for microstructure design, and evidence for the benefits of dynamical control of self-organization systems. We finally present dramatically different porous architectures from this approach reminiscent of microscale Petri dishes, conical flasks, and test tubes.
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Affiliation(s)
| | - John E Sader
- School of Mathematics and Statistics, The University of Melbourne , Victoria 3010, Australia
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10
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Highly ordered and robust honeycomb films with tunable pore sizes fabricated via UV crosslinking after applying improved phase separation. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.07.056] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Zhang A, Bai H, Li L. Breath Figure: A Nature-Inspired Preparation Method for Ordered Porous Films. Chem Rev 2015; 115:9801-68. [PMID: 26284609 DOI: 10.1021/acs.chemrev.5b00069] [Citation(s) in RCA: 233] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aijuan Zhang
- College of Materials, Xiamen University , Xiamen, 361005, People's Republic of China
| | - Hua Bai
- College of Materials, Xiamen University , Xiamen, 361005, People's Republic of China
| | - Lei Li
- College of Materials, Xiamen University , Xiamen, 361005, People's Republic of China
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12
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Gao JP, Wu W, Rong L, Mao GL, Ning YN, Zhao QL, Huang J, Ma Z. Well-defined monocarboxyl-terminated polystyrene with low molecular weight: A candidate for the fabrication of highly ordered microporous films and microspheres via a static breath-figure process. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.07.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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13
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Valtola L, Karesoja M, Tenhu H, Ihalainen P, Sarfraz J, Peltonen J, Malinen M, Urtti A, Hietala S. Breath figure templated semifluorinated block copolymers with tunable surface properties and binding capabilities. J Appl Polym Sci 2014. [DOI: 10.1002/app.41225] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lauri Valtola
- Laboratory of Polymer Chemistry; Department of Chemistry; University of Helsinki; Helsinki Finland
| | - Mikko Karesoja
- Laboratory of Polymer Chemistry; Department of Chemistry; University of Helsinki; Helsinki Finland
| | - Heikki Tenhu
- Laboratory of Polymer Chemistry; Department of Chemistry; University of Helsinki; Helsinki Finland
| | - Petri Ihalainen
- Department of Physical Chemistry; Åbo Akademi University; Porthansgatan 3-5 FIN-20500 Åbo Finland
| | - Jawad Sarfraz
- Department of Physical Chemistry; Åbo Akademi University; Porthansgatan 3-5 FIN-20500 Åbo Finland
| | - Jouko Peltonen
- Department of Physical Chemistry; Åbo Akademi University; Porthansgatan 3-5 FIN-20500 Åbo Finland
| | - Melina Malinen
- Division of Biopharmaceutics and Pharmacokinetics; Faculty of Pharmacy; Centre for Drug Research, University of Helsinki; Helsinki Finland
| | - Arto Urtti
- Division of Biopharmaceutics and Pharmacokinetics; Faculty of Pharmacy; Centre for Drug Research, University of Helsinki; Helsinki Finland
| | - Sami Hietala
- Laboratory of Polymer Chemistry; Department of Chemistry; University of Helsinki; Helsinki Finland
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14
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Muñoz-Bonilla A, Fernández-García M, Rodríguez-Hernández J. Towards hierarchically ordered functional porous polymeric surfaces prepared by the breath figures approach. Prog Polym Sci 2014. [DOI: 10.1016/j.progpolymsci.2013.08.006] [Citation(s) in RCA: 192] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Wan LS, Zhu LW, Ou Y, Xu ZK. Multiple interfaces in self-assembled breath figures. Chem Commun (Camb) 2014; 50:4024-39. [DOI: 10.1039/c3cc49826c] [Citation(s) in RCA: 132] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Progress in the breath figure method is reviewed by emphasizing the role of the multiple interfaces and the applications of honeycomb films in separation, biocatalysis, biosensing, templating, stimuli-responsive surfaces and adhesive surfaces.
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Affiliation(s)
- Ling-Shu Wan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027, China
| | - Liang-Wei Zhu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027, China
| | - Yang Ou
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027, China
| | - Zhi-Kang Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027, China
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16
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Bai H, Du C, Zhang A, Li L. Kondensationsmuster: Erzeugung, Funktionalisierung und Anwendungen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303594] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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17
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Bai H, Du C, Zhang A, Li L. Breath Figure Arrays: Unconventional Fabrications, Functionalizations, and Applications. Angew Chem Int Ed Engl 2013; 52:12240-55. [DOI: 10.1002/anie.201303594] [Citation(s) in RCA: 149] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Indexed: 01/23/2023]
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18
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Zhang C, Wang X, Min K, Lee D, Wei C, Schulhauser H, Gao H. Developing Porous Honeycomb Films Using Miktoarm Star Copolymers and Exploring Their Application in Particle Separation. Macromol Rapid Commun 2013; 35:221-227. [DOI: 10.1002/marc.201300581] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 08/26/2013] [Indexed: 01/06/2023]
Affiliation(s)
- Chengyi Zhang
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall; University of Notre Dame; Indiana 46556-5670 USA
| | - Xiaofeng Wang
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall; University of Notre Dame; Indiana 46556-5670 USA
| | - Ke Min
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall; University of Notre Dame; Indiana 46556-5670 USA
| | - Doyun Lee
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall; University of Notre Dame; Indiana 46556-5670 USA
| | - Chuan Wei
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall; University of Notre Dame; Indiana 46556-5670 USA
| | - Hannah Schulhauser
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall; University of Notre Dame; Indiana 46556-5670 USA
| | - Haifeng Gao
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall; University of Notre Dame; Indiana 46556-5670 USA
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19
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Fan D, Xia X, Ma H, Du B, Wei Q. Honeycomb-patterned fluorescent films fabricated by self-assembly of surfactant-assisted porphyrin/polymer composites. J Colloid Interface Sci 2013; 402:146-50. [DOI: 10.1016/j.jcis.2013.03.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Revised: 03/11/2013] [Accepted: 03/14/2013] [Indexed: 11/25/2022]
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20
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Haberko J, Bernasik A, Łużny W, Hasik M, Raczkowska J, Rysz J, Budkowski A. Humidity and wetting effects in spin-cast blends of insulating polymers and conducting polyaniline doped with DBSA. J Appl Polym Sci 2013. [DOI: 10.1002/app.37742] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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21
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Lee W, Lee SY, Zhang X, Rabin O, Briber RM. Hexagonally ordered nanoparticles templated using a block copolymer film through Coulombic interactions. NANOTECHNOLOGY 2013; 24:045305. [PMID: 23299056 DOI: 10.1088/0957-4484/24/4/045305] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We present a novel and simple method for forming hexagonal gold nanoparticle arrays that uses Coulombic interactions between negatively charged gold nanoparticles on positively charged vertically oriented poly(4-vinylpyridine) cylinders formed in a spin cast polystyrene-b-poly(4-vinylpyridine) block copolymer film. Exposure of the block copolymer film to dibromobutane vapor quaternizes and crosslinks the poly(4-vinylpyridine) domains which allows for the templated deposition of gold nanoparticles into a self-assembled hexagonal array through electrostatic interactions. These systems can form the basis for sensors or next generation nanoparticle based electronics.
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Affiliation(s)
- Wonjoo Lee
- Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-2115, USA.
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22
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Escalé P, Rubatat L, Billon L, Save M. Recent advances in honeycomb-structured porous polymer films prepared via breath figures. Eur Polym J 2012. [DOI: 10.1016/j.eurpolymj.2012.03.001] [Citation(s) in RCA: 159] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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Wu D, Xu F, Sun B, Fu R, He H, Matyjaszewski K. Design and Preparation of Porous Polymers. Chem Rev 2012; 112:3959-4015. [DOI: 10.1021/cr200440z] [Citation(s) in RCA: 1339] [Impact Index Per Article: 111.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Dingcai Wu
- Materials Science Institute,
Key Laboratory for Polymeric Composite and Functional Materials of
Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, People's
Republic of China
| | - Fei Xu
- Materials Science Institute,
Key Laboratory for Polymeric Composite and Functional Materials of
Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, People's
Republic of China
| | - Bin Sun
- Materials Science Institute,
Key Laboratory for Polymeric Composite and Functional Materials of
Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, People's
Republic of China
| | - Ruowen Fu
- Materials Science Institute,
Key Laboratory for Polymeric Composite and Functional Materials of
Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, People's
Republic of China
| | - Hongkun He
- Department
of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh,
Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Department
of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh,
Pennsylvania 15213, United States
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Nanostructured material surfaces--preparation, effect on cellular behavior, and potential biomedical applications: a review. Int J Artif Organs 2012; 34:963-85. [PMID: 22161281 DOI: 10.5301/ijao.5000012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2011] [Indexed: 12/14/2022]
Abstract
Nanostructures play important roles in vivo, where nanoscaled features of extracellular matrix (ECM) components influence cell behavior and resultant tissue formation. This review summarizes some of the recent developments in fostering new concepts and approaches to nanofabrication, such as top-down and bottom-up and combinations of the two. As in vitro investigations demonstrate that man-made nanotopography can be used to control cell reactions to a material surface, its potential application in implant design and tissue engineering becomes increasingly evident. Therefore, we present recent progress in directing cell fate in the field of cell mechanics, which has grown rapidly over the last few years, and in various tissue-engineering applications. The main focus is on the initial responses of cells to nanostructured surfaces and subsequent influences on cellular functions. Specific examples are also given to illustrate the potential nanostructures may have for biomedical applications and regenerative medicine.
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25
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26
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Yabu H. Creation of Functional and Structured Polymer Particles by Self-Organized Precipitation (SORP). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2012. [DOI: 10.1246/bcsj.20110197] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hiroshi Yabu
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST)
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27
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Tse KH, Sun M, Mantovani C, Terenghi G, Downes S, Kingham PJ. In vitro evaluation of polyester-based scaffolds seeded with adipose derived stem cells for peripheral nerve regeneration. J Biomed Mater Res A 2011; 95:701-8. [PMID: 20725987 DOI: 10.1002/jbm.a.32889] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
To overcome the disadvantages of autografts for peripheral nerve repair, different methods such as artificial nerve conduits have been investigated for an alternative approach. This study demonstrated that solvent casting is a simple but efficient method to create thin polyester-based scaffolds for stem cell delivery. Using poly (ε-caprolactone) and poly (D,L-lactic acid), we produced scaffold films containing heterogenous depressions (pits) on the air surface with a size ranging from 0.5 to 30 μm(2). These scaffolds were moderately hydrophobic; however, they supported the differentiation of adipose derived stem cells (ADSC) into a Schwann cell-like phenotype. The differentiated ADSC (dADSC) expressed S100 protein and glial fibrillary acidic protein and readily adhered to the films and proliferated at a similar rate to those cultured on tissue culture polystyrene. Cells were also positive for proliferating cell nuclear antigen. Furthermore, dADSC retained functional activity and significantly enhanced neurite outgrowth from dorsal root ganglia neurons. This study suggests polymer scaffolds combined with dADSCs could be a promising therapy for peripheral nerve injuries.
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Affiliation(s)
- Kai-Hei Tse
- Blond McIndoe Research Laboratories, Faculty of Medical and Human Sciences, University of Manchester, Manchester M13 9PT, United Kingdom
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29
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Ke BB, Wan LS, Li Y, Xu MY, Xu ZK. Selective layer-by-layer self-assembly on patterned porous films modulated by Cassie–Wenzel transition. Phys Chem Chem Phys 2011; 13:4881-7. [DOI: 10.1039/c0cp01229g] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Ma H, Hao J. Ordered patterns and structures via interfacial self-assembly: superlattices, honeycomb structures and coffee rings. Chem Soc Rev 2011; 40:5457-71. [DOI: 10.1039/c1cs15059f] [Citation(s) in RCA: 151] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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31
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Wan LS, Lv J, Ke BB, Xu ZK. Facilitated and site-specific assembly of functional polystyrene microspheres on patterned porous films. ACS APPLIED MATERIALS & INTERFACES 2010; 2:3759-3765. [PMID: 21105716 DOI: 10.1021/am1009277] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Functional patterned materials have received considerable attention because of their potential applications in biochips, sensors, and optical or electronic materials. Here, we report a versatile approach to functional patterned films based on facilitated and site-specific assembly of microspheres. This method includes the hierarchical formation of honeycomb-patterned porous films from amphiphilic block copolymers and the assembly of functional polystyrene microspheres driven by the gravity and the electrostatic interaction. Polystyrene microspheres containing carboxyl groups with a narrow size distribution were synthesized by dispersion polymerization. Honeycomb-patterned porous films were prepared from polystyrene-block-poly(N,N-dimethylaminoethyl methacrylate) (PS-b-PDMAEMA) by the breath figure method and then quaternized. We found that direct deposition of the microspheres on the patterned films reaches high filling ratio only when using ethanol dispersions that can wet the film pores. Plasma treatment of the films improves the hydrophilicity and introduces charged species to the external surface as well as the pore surface, leading to nonspecific assembly of microspheres. Negatively charged microspheres dispersed in buffer solution show a facilitated and site-specific assembly on the quaternized film. The electrostatic interaction as well as the gravity facilitates the assembly and the suborder arrangement of the hydrophilic PDMAEMA block around the pores is responsible for the site-specific assembly. In addition, we demonstrate the applicability of this method in preparing photoluminescent patterns by the assembly of porphyrinated microspheres, which is useful in various fields such as intelligent sensing.
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Affiliation(s)
- Ling-Shu Wan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
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32
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Cai Q, Wang Y, Yang F, Shen H, Yang X, Wang S. Phase separation of polyphosphazene/poly(lactide-co
-glycolide) blends prepared under different conditions. POLYM ADVAN TECHNOL 2010. [DOI: 10.1002/pat.1783] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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33
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34
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Geldhauser T, Walheim S, Schimmel T, Leiderer P, Boneberg J. Influence of the Relative Humidity on the Demixing of Polymer Blends on Prepatterned Substrates. Macromolecules 2009. [DOI: 10.1021/ma9022058] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- T. Geldhauser
- University of Konstanz, Universitätsstr. 10, 78457 Konstanz, Germany
| | - S. Walheim
- Institute of Nanotechnology (INT), Forschungszentrum Karlsruhe, D-76021 Karlsruhe, Germany
- Institute of Applied Physics, Center for Functional Nanostructures (CFN), Universität Karlsruhe, D-76128 Karlsruhe, Germany
| | - Th. Schimmel
- Institute of Nanotechnology (INT), Forschungszentrum Karlsruhe, D-76021 Karlsruhe, Germany
- Institute of Applied Physics, Center for Functional Nanostructures (CFN), Universität Karlsruhe, D-76128 Karlsruhe, Germany
| | - P. Leiderer
- University of Konstanz, Universitätsstr. 10, 78457 Konstanz, Germany
| | - J. Boneberg
- University of Konstanz, Universitätsstr. 10, 78457 Konstanz, Germany
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35
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Liu W, Liu R, Li Y, Wang W, Ma L, Wu M, Huang Y. Self-organized ordered microporous thin films from grafting copolymers. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.04.009] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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36
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Muñoz-Bonilla A, Ibarboure E, Papon E, Rodriguez-Hernandez J. Engineering polymer surfaces with variable chemistry and topography. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23305] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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37
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Billon L, Manguian M, Pellerin V, Joubert M, Eterradossi O, Garay H. Tailoring Highly Ordered Honeycomb Films Based on Ionomer Macromolecules by the Bottom-Up Approach. Macromolecules 2008. [DOI: 10.1021/ma8020568] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Laurent Billon
- Institut Pluridisciplinaire de Recherche sur l’Environnement et les Matériaux, Equipe Physico-Chimie des Polymères IPREM/EPCP CNRS UMR 5254, Université de Pau et des Pays de l’Adour, Hélioparc Pau Pyrénées, 64012 Pau Cedex, France, and Centre de Matériaux de Grande Diffusion, Ecole de Mines d’Alès, 2 avenue Angot, 64053 Pau Cedex 09, France
| | - Maggy Manguian
- Institut Pluridisciplinaire de Recherche sur l’Environnement et les Matériaux, Equipe Physico-Chimie des Polymères IPREM/EPCP CNRS UMR 5254, Université de Pau et des Pays de l’Adour, Hélioparc Pau Pyrénées, 64012 Pau Cedex, France, and Centre de Matériaux de Grande Diffusion, Ecole de Mines d’Alès, 2 avenue Angot, 64053 Pau Cedex 09, France
| | - Virginie Pellerin
- Institut Pluridisciplinaire de Recherche sur l’Environnement et les Matériaux, Equipe Physico-Chimie des Polymères IPREM/EPCP CNRS UMR 5254, Université de Pau et des Pays de l’Adour, Hélioparc Pau Pyrénées, 64012 Pau Cedex, France, and Centre de Matériaux de Grande Diffusion, Ecole de Mines d’Alès, 2 avenue Angot, 64053 Pau Cedex 09, France
| | - Mathieu Joubert
- Institut Pluridisciplinaire de Recherche sur l’Environnement et les Matériaux, Equipe Physico-Chimie des Polymères IPREM/EPCP CNRS UMR 5254, Université de Pau et des Pays de l’Adour, Hélioparc Pau Pyrénées, 64012 Pau Cedex, France, and Centre de Matériaux de Grande Diffusion, Ecole de Mines d’Alès, 2 avenue Angot, 64053 Pau Cedex 09, France
| | - Olivier Eterradossi
- Institut Pluridisciplinaire de Recherche sur l’Environnement et les Matériaux, Equipe Physico-Chimie des Polymères IPREM/EPCP CNRS UMR 5254, Université de Pau et des Pays de l’Adour, Hélioparc Pau Pyrénées, 64012 Pau Cedex, France, and Centre de Matériaux de Grande Diffusion, Ecole de Mines d’Alès, 2 avenue Angot, 64053 Pau Cedex 09, France
| | - Hélène Garay
- Institut Pluridisciplinaire de Recherche sur l’Environnement et les Matériaux, Equipe Physico-Chimie des Polymères IPREM/EPCP CNRS UMR 5254, Université de Pau et des Pays de l’Adour, Hélioparc Pau Pyrénées, 64012 Pau Cedex, France, and Centre de Matériaux de Grande Diffusion, Ecole de Mines d’Alès, 2 avenue Angot, 64053 Pau Cedex 09, France
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38
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Wu CY, Chiang TH, Hsu CC. Fabrication of microlens array diffuser films with controllable haze distribution by combination of breath figures and replica molding methods. OPTICS EXPRESS 2008; 16:19978-19986. [PMID: 19030084 DOI: 10.1364/oe.16.019978] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This work demonstrates the fabrication of a simple, low-cost microlens array (MLA) diffuser film with controllable haze distribution (diffusion effect) by a combination of "breath figures" (BFs) and micro-replica molding methods. Polystyrene (PS) molds obtained by BFs method contain concave, hexagonal packed air holes formed by the condensation of water vapor on cooling surfaces in a chamber in which relevant influence factors can be controlled. The sizes of the air holes in the BFs PS molds can be controlled by varying such factors as chamber temperature, chamber relative humidity, substrate temperature and others. The temperature distribution on the substrate affects the distribution of diameters of the air holes formed in a BFs PS mold. Convex PDMS (poly-dimethylsiloxane) MLAs were obtained by molding from the BFs PS molds. The focal lengths of MLAs were measured and compared with theoretical values. The diffusion effect of the diffuser films with MLAs of diameters 6 microm and 3 microm were compared. The results indicate that an MLA with a smaller diameter has a larger diffusion effect.
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Affiliation(s)
- Cheng Yi Wu
- Department of Physics, National Chung Cheng University, Ming Hsiung, Chia Yi 621, Taiwan
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39
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He B, Li J, Zhang X, Li Z, Hou Y, Shi C. Honeycomb-Structured Porous Films Controlled by the Temperature of Water Bath. Polym J 2008. [DOI: 10.1295/polymj.pj2008161] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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40
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Valentini L, Bittolo Bon S, Kenny JM. Realization of porous poly(methyl methacrylate) films filled with electrodeposited carbon nanotubes. NANOTECHNOLOGY 2008; 19:295301. [PMID: 21730600 DOI: 10.1088/0957-4484/19/29/295301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A deposition process on a conducting surface, in which water acted as the dispersed phase and a mixture of poly(methyl methacrylate) and chloroform as the continuous phase, was applied to prepare poly(methyl methacrylate) films. The influence of relative humidity during the film preparation on the surface morphology was investigated by field emission scanning microscopy. High-humidity preparation conditions lead to porous poly(methyl methacrylate) films. These films were then used as templates to perform the selective deposition into the pores of single-walled carbon nanotubes by an electrophoretic method. The attractive properties of carbon nanotubes combined with the versatile properties of poly(methyl methacrylate) open up new opportunities for these nanocomposites to achieve novel architectures in nanodevices and microdevices.
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Affiliation(s)
- L Valentini
- Dipartimento di Ingegneria Civile e Ambientale, Università di Perugia, NIPLAB-INSTM, UdR Perugia, 05100 Terni, Italy
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41
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Madej W, Budkowski A, Raczkowska J, Rysz J. Breath figures in polymer and polymer blend films spin-coated in dry and humid ambience. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:3517-3524. [PMID: 18294016 DOI: 10.1021/la703363a] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We investigate effects of two spin-coating parameters, relative humidity (5% < or = RH < or = 80%) in ambient atmosphere and water content (3 wt % < or = f(H2O) < or = 20 wt %) in solution (rich in tetrahydrofuran), on the structure of breath figures (BF) formed in spin-cast films of polar poly(methyl methacrylate) (PMMA) and PMMA mixed with nonpolar polystyrene (PS). Film morphologies, examined with atomic and lateral force microscopy, are analyzed with integral geometry analysis to yield morphological BF measures. In PMMA, water added to solution has much stronger impact than that from moisture on formed BFs, which could be ordered (with conformational entropy S approximately 0.9-1.0). In PMMA/PS, BFs decorate exclusively polar PMMA domains, resulting in morphologies with two length scales (sub-micrometer BFs and domains >10 microm). This suggests a novel strategy for herarchic structure formation in multicomponent polymer films. In PS/PMMA, BFs are better developed than in pure PMMA spin-coated in identical conditions. These observations show that the air boundary layer facing the spin-cast polymer film (region) is more important than the ambient atmosphere.
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Affiliation(s)
- Wojciech Madej
- Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland
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42
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Wang C, Mao Y, Wang D, Qu Q, Yang G, Hu X. Fabrication of highly ordered microporous thin films by PS-b-PAA self-assembly and investigation of their tunable surface properties. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b715520d] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Pilati F, Montecchi M, Fabbri P, Synytska A, Messori M, Toselli M, Grundke K, Pospiech D. Design of surface properties of PET films: Effect of fluorinated block copolymers. J Colloid Interface Sci 2007; 315:210-22. [PMID: 17658543 DOI: 10.1016/j.jcis.2007.06.046] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2007] [Revised: 05/31/2007] [Accepted: 06/19/2007] [Indexed: 10/23/2022]
Abstract
This paper demonstrates that the addition of fluorinated block copolymers to PET solutions can be used to prepare PET films with controlled surface morphology, porosity and chemical composition, by exploiting the phenomenon known as breath figures (BF) formation during a spin-coating procedure. Surface features, such as number, depth and diameter of pores and chemical composition, can be tuned by varying the experimental conditions: relative humidity, solution composition and amount of the fluorinated block copolymer added to the PET solutions (in the range of 0.5-10 wt% with respect to PET). BF patterns are more evident at relatively high concentrations of PET (3 wt%) and content of fluorinated block copolymer (10 wt% with respect to PET) in the solution. According to the obtained results, the fluorinated block copolymer seems to play a role in different steps of the mechanism of BF formation. XPS measurements showed a surface composition much richer in fluorinated segments than expected from bulk composition. The combined surface roughness and surface segregation of fluorinated segments have only a limited effect on the macroscopic wettability of the surfaces.
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Affiliation(s)
- F Pilati
- Dipartimento di Ingegneria dei Materiali e dell'Ambiente, Università di Modena e Reggio Emilia, Via Vignolese 905/A, 41100 Modena, Italy.
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44
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Hoa MLK, Lu M, Zhang Y. Preparation of porous materials with ordered hole structure. Adv Colloid Interface Sci 2006; 121:9-23. [PMID: 16863642 DOI: 10.1016/j.cis.2006.05.029] [Citation(s) in RCA: 122] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2005] [Revised: 05/26/2006] [Accepted: 05/30/2006] [Indexed: 10/24/2022]
Abstract
This review paper investigates the synthesis of porous structures with controlled hole pattern and provides an overall view of the various factors involved when synthesizing such porous materials. The following factors are discussed: 1) various methods of synthesis to produce the porous structures; 2) materials which the porous structures are made of; 3) control of the pore structure; 4) various applications of such porous materials. The materials of the porous structures and the control of the pore structure will also be discussed separately under each different method, as these two factors are closely dependent on the method of fabrication.
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Affiliation(s)
- Marcus Liew Kai Hoa
- Division of Bioengineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore
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45
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Laforgue A, Bazuin CG, Prud'homme RE. A Study of the Supramolecular Approach in Controlling Diblock Copolymer Nanopatterning and Nanoporosity on Surfaces. Macromolecules 2006. [DOI: 10.1021/ma061129h] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexis Laforgue
- Département de chimie, Université de Montréal, C.P. 6128 Succ. Centre-Ville, Montréal (QC), Canada H3C 3J7
| | - C. Geraldine Bazuin
- Département de chimie, Université de Montréal, C.P. 6128 Succ. Centre-Ville, Montréal (QC), Canada H3C 3J7
| | - Robert E. Prud'homme
- Département de chimie, Université de Montréal, C.P. 6128 Succ. Centre-Ville, Montréal (QC), Canada H3C 3J7
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46
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Tian Y, Jiao Q, Ding H, Shi Y, Liu B. The formation of honeycomb structure in polyphenylene oxide films. POLYMER 2006. [DOI: 10.1016/j.polymer.2006.03.081] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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47
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Wang Y, Liu Z, Huang Y, Han B, Yang G. Micropatterned polymer surfaces induced by nonsolvent. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:1928-31. [PMID: 16460129 DOI: 10.1021/la051646d] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
In this work, we present a facile method for fabricating polymer thin films with micropatterned surfaces by evaporating polymer solution containing a small amount of nonsolvent of polymer in air. Poly(methyl methacrylate) (PMMA) and polystyrene (PS) films with densely packed micropores on the surfaces were fabricated. This method was also used to prepare three-dimensional PMMA films with micropatterned surfaces. The effects of nonsolvent content; evaporation temperature; and interactions between the polymer, solvent, and nonsolvent on the specific patterns were investigated, and the formation mechanism of the pores is discussed. This simple route can potentially be used, for example, in the large-scale production of patterned surfaces, three-dimensional painting, and hydrophobicity-enhancing coatings.
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Affiliation(s)
- Yong Wang
- Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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48
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Cui L, Xuan Y, Li X, Ding Y, Li B, Han Y. Polymer surfaces with reversibly switchable ordered morphology. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:11696-703. [PMID: 16316103 DOI: 10.1021/la051376z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Honeycomb macroporous films fabricated by the "breath figures" method were composed of poly2-vinylpyridine (P2VP) distributed in the holes of polystyrene (PS). The porous films exhibited reversible behavior responding to water and different solvent vapors. When the porous film was treated with water, the honeycomb pattern would change to the hexagonal islandlike pattern. Once heated to remove the water, the honeycomb pattern emerged again. When the porous film was exposed to different solvent vapors, the same reversible process appeared. Carbon disulfide (CS(2)), toluene (TOL), and tetrahydrofuran (THF) solvent vapors induced the honeycomb pattern into the ordered islandlike pattern, and ethanol, chloroform, methyl ethyl ketone (MEK), and dimethylformamide (DMF) solvent vapors made the islandlike pattern come back to the honeycomb pattern. The hygroscopic property of P2VP and the polymer-solvent interaction are the driving force for the reversibly switchable morphology. The appropriate control of the hole depth is very crucial in determining the reversible changes.
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Affiliation(s)
- Liang Cui
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences
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