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Liu E, Zhang X, Ji H, Li Q, Li L, Wang J, Han X, Yu S, Xu F, Cao Y, Lu C. Polarization‐Dependent Ultrasensitive Dynamic Wrinkling on Floating Films Induced by Photo‐Orientation of Azopolymer. Angew Chem Int Ed Engl 2022; 61:e202203715. [DOI: 10.1002/anie.202203715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Enping Liu
- School of Materials Science and Engineering Tianjin University Tianjin 300072 P. R. China
| | - Xiaoliang Zhang
- Department of Aeronautics and Astronautics Fudan University Shanghai 200433 P. R. China
| | - Haipeng Ji
- China Aerospace Science and Industry Corporation Sixth Academy No. 46 Institute Hohhot 010010 P. R. China
| | - Qifeng Li
- School of Precision Instruments and Optoelectronics Engineering Tianjin University Tianjin 300072 P. R. China
| | - Lele Li
- School of Materials Science and Engineering Tianjin University Tianjin 300072 P. R. China
| | - Juanjuan Wang
- School of Materials Science and Engineering Tianjin Key Laboratory of Building Green Functional Materials Tianjin Chengjian University Tianjin 300384 P. R. China
| | - Xue Han
- School of Materials Science and Engineering Tianjin Key Laboratory of Building Green Functional Materials Tianjin Chengjian University Tianjin 300384 P. R. China
| | - Shixiong Yu
- School of Materials Science and Engineering Tianjin University Tianjin 300072 P. R. China
| | - Fan Xu
- Department of Aeronautics and Astronautics Fudan University Shanghai 200433 P. R. China
| | - Yanping Cao
- Department of Engineering Mechanics Tsinghua University Beijing 100084 P. R. China
| | - Conghua Lu
- School of Materials Science and Engineering Tianjin University Tianjin 300072 P. R. China
- School of Materials Science and Engineering Tianjin Key Laboratory of Building Green Functional Materials Tianjin Chengjian University Tianjin 300384 P. R. China
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2
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Liu E, Zhang X, Ji H, Li Q, Li L, Wang J, Han X, Yu S, Xu F, Cao Y, Lu C. Polarization‐Dependent Ultrasensitive Dynamic Wrinkling on Floating Films Induced by Photo‐Orientation of Azopolymer. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Enping Liu
- Tianjin University School of Materials Science and Engineering 300072 Tianjin CHINA
| | - Xiaoliang Zhang
- Fudan University Department of Aeronautics and Astronautics CHINA
| | - Haipeng Ji
- China Aerospace Science and Industry Corp Sixth Academy No. 46 Institute 010010 Hohhot CHINA
| | - Qifeng Li
- Tianjin University School of Precision Instruments and Optoelectronics Engineering 300072 Tianjin CHINA
| | - Lele Li
- Tianjin University School of Materials Science and Engineering CHINA
| | - Juanjuan Wang
- Tianjin Chengjian University School of Materials Science and Engineering, Tianjin Key Laboratory of Building Green Functional Materials 300384 Tianjin CHINA
| | - Xue Han
- Tianjin Chengjian University School of Materials Science and Engineering, Tianjin Key Laboratory of Building Green Functional Materials 300384 Tianjin CHINA
| | - Shixiong Yu
- Tianjin University School of Materials Science and Engineering 300072 Tianjin CHINA
| | - Fan Xu
- Fudan University Department of Aeronautics and Astronautics 200433 Shanghai CHINA
| | - Yanping Cao
- Tsinghua University Department of Engineering Mechanics 100084 Beijing CHINA
| | - Conghua Lu
- Tianjin University Nankai District, Weijin Road No.92 300384 Tianjin CHINA
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3
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Bagatur S, Schlesag M, Fuhrmann-Lieker T. Polarization Dependent Photoinduced Supramolecular Chirality in High-Performance Azo Materials. Molecules 2021; 26:2842. [PMID: 34064773 PMCID: PMC8150594 DOI: 10.3390/molecules26102842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/26/2021] [Accepted: 05/04/2021] [Indexed: 11/26/2022] Open
Abstract
Here, we will show photo-induced supramolecular chirality in thin films of achiral amorphous polymers with azo groups in their side-chain. A matter of particular interest is the effect of various film thicknesses on azimuthal rotation and ellipticity of incident/transmitted polarized light. Furthermore, we investigated the temporal stability of inscribed chirality. By polarimetric measurements, we found out that the azimuthal rotation gets higher with layer thickness. In this scope, we were able to measure a very high azimuthal rotation of Δψ/d=112.5∘/μm. The inscribed chirality was stable for several days. Furthermore, we investigated the time-resolved behavior of incident and transmitted polarization ellipticities for various thicknesses. The time dependency may be explained by a two-step process: (1) fast trans-cis-isomerization resulting in photo-orientation and (2) slow photo-induced mass flow.
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Affiliation(s)
| | | | - Thomas Fuhrmann-Lieker
- Physical Chemistry of Nanomaterials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology, University of Kassel, Heinrich-Plett Str. 40, 34132 Kassel, Germany; (S.B.); (M.S.)
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4
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Wang J, Han X, Ji H, Lu C. Light-Associated Surface Wrinkling-Based Metrology for the Photosoftening Characterization in Azobenzene-Polymer Supramolecular Complexes. Macromol Rapid Commun 2021; 42:e2000704. [PMID: 33448071 DOI: 10.1002/marc.202000704] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/20/2020] [Indexed: 12/25/2022]
Abstract
As an intriguing characteristic of azobenzene-containing materials (azo-materials), photoinduced changes in mechanical properties (e.g., photosoftening) have stimulated many efforts both theoretically and experimentally. Here a simple yet powerful tool (i.e., a light-associated surface wrinkling-based method) to study the photosoftening effect in azobenzene-polymer (azo-polymer) supramolecular complexes is reported. The photo-induced modulus decrease of supramolecular complex films is deduced by analyzing the change of critical wrinkle wavelength of strain-induced surface wrinkling, in the case of varying experiment parameters. In particular, thanks to the facile modular tunability of the supramolecular system, the photosoftening effect has been systematically investigated as a function of azo-moiety content and the molecular weight of the host polymer. Notably, a photosoftening coefficient that is related to the chemical composition/structure of azo-polymers is introduced, and a simple formula that can quantify the connection of the photosoftening with external irradiation conditions and internal chemical factors of azo-polymers is derived for the first time. The obtained results are of great importance not only to enhance understanding of the photosoftening mechanism, but also to thoroughly apply it in diverse smart fields.
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Affiliation(s)
- Juanjuan Wang
- School of Materials Science and Engineering, Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University, Tianjin, 300384, China
| | - Xue Han
- School of Materials Science and Engineering, Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University, Tianjin, 300384, China
| | - Haipeng Ji
- The Synthetic Chemical & Engineering Institute of Inner Mongolia, Huhhot, 010010, China
| | - Conghua Lu
- School of Materials Science and Engineering, Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University, Tianjin, 300384, China
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5
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Hoinka NM, Ostwald C, Fuhrmann-Lieker T. Two-dimensional Wrinkle Resonators for Random Lasing in Organic Glasses. Sci Rep 2020; 10:2434. [PMID: 32051460 PMCID: PMC7015940 DOI: 10.1038/s41598-020-59236-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 12/30/2019] [Indexed: 11/09/2022] Open
Abstract
Random lasers consisting of slab waveguides with two-dimensional disordered wrinkling patterns that act as scattering resonators are reported. As active material 2,2',7,7'-tetraphenyl-9,9'-spirobifluorene is used which is sandwiched between an oxidized silicon wafer and a cladding with higher glass transition temperature. Wrinkles with tailorable periodicity have been induced by thermal annealing. Photopumping experiments show the transition from amplified spontaneous emission to a multiple peak laser spectrum with linewidths as low as 0.1 nm, demonstrating the applicability of this approach for random laser design.
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Affiliation(s)
- Nicolai M Hoinka
- Macromolecular Chemistry and Molecular Materials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology, University of Kassel, Heinrich-Plett Str. 40, 34132, Kassel, Germany
| | - Christoph Ostwald
- Macromolecular Chemistry and Molecular Materials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology, University of Kassel, Heinrich-Plett Str. 40, 34132, Kassel, Germany
| | - Thomas Fuhrmann-Lieker
- Macromolecular Chemistry and Molecular Materials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology, University of Kassel, Heinrich-Plett Str. 40, 34132, Kassel, Germany.
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6
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Wang J, Zheng Y, Li L, Liu E, Zong C, Zhao J, Xie J, Xu F, König TAF, Grenzer Saphiannikova M, Cao Y, Fery A, Lu C. All-Optical Reversible Azo-Based Wrinkling Patterns with High Aspect Ratio and Polarization-Independent Orientation for Light-Responsive Soft Photonics. ACS APPLIED MATERIALS & INTERFACES 2019; 11:25595-25604. [PMID: 31264839 DOI: 10.1021/acsami.9b07349] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Azobenzene-containing polymers (azopolymers) can serve as building blocks for an emerging class of soft photonics. Using their photoresponses for the micro/nanofabrication of smart surface is a key but still a challenging step. Here, we report a simple visible-light-illumination strategy to trigger diverse configurations of surface wrinkling on azopolymer-based film/substrate systems, which can be switched between flat and wrinkled states by controlling the intensity of the incident light. Different photoresponsive characteristics of azobenzene are involved in driving the wrinkling/dewrinkling switch. For the first time, we achieve the controlled wrinkling with an unexpected high aspect ratio and surprisingly polarization-independent ordered orientation by exploiting the unique photosoftening effect of azobenzene. Theoretical analysis reveals that an in situ photoinduced reversible soft/hard-contrast boundary determines the wrinkling orientation, which is used to fabricate diverse on-demand hierarchical wrinkles. These photoresponsive systems find broad photonic applications that are not easily accessible to other systems, e.g., optically reversible smart display, information security, and well-regulated optical devices.
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Affiliation(s)
- Juanjuan Wang
- School of Materials Science and Engineering , Tianjin University , Tianjin 300072 , P. R. China
- Leibniz Institute of Polymer Research Dresden e.V. , Dresden 01069 , Germany
| | - Yang Zheng
- Department of Engineering Mechanics , Tsinghua University , Beijing 100084 , P. R. China
| | - Lele Li
- School of Materials Science and Engineering , Tianjin University , Tianjin 300072 , P. R. China
| | - Enping Liu
- School of Materials Science and Engineering , Tianjin University , Tianjin 300072 , P. R. China
| | - Chuanyong Zong
- School of Materials Science and Engineering , Tianjin University , Tianjin 300072 , P. R. China
| | - Jingxin Zhao
- School of Materials Science and Engineering , Tianjin University , Tianjin 300072 , P. R. China
| | - Jixun Xie
- School of Materials Science and Engineering , Tianjin University , Tianjin 300072 , P. R. China
| | - Fan Xu
- Department of Aeronautics and Astronautics , Fudan University , Shanghai 200433 , P. R. China
| | - Tobias A F König
- Leibniz Institute of Polymer Research Dresden e.V. , Dresden 01069 , Germany
- Cluster of Excellence Center for Advancing Electronics Dresden , Dresden University of Technology , Dresden 01062 , Germany
| | | | - Yanping Cao
- Department of Engineering Mechanics , Tsinghua University , Beijing 100084 , P. R. China
| | - Andreas Fery
- Leibniz Institute of Polymer Research Dresden e.V. , Dresden 01069 , Germany
- Cluster of Excellence Center for Advancing Electronics Dresden , Dresden University of Technology , Dresden 01062 , Germany
| | - Conghua Lu
- School of Materials Science and Engineering , Tianjin University , Tianjin 300072 , P. R. China
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7
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Wang R, Long Y, Zhu T, Guo J, Cai C, Zhao N, Xu J. Fabrication of oriented wrinkles on polydopamine/polystyrene bilayer films. J Colloid Interface Sci 2017; 498:123-127. [PMID: 28324717 DOI: 10.1016/j.jcis.2017.03.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 02/26/2017] [Accepted: 03/05/2017] [Indexed: 11/28/2022]
Abstract
Wrinkles exist widely in nature and our life. In this paper, wrinkles on polydopamine (PDA)/polystyrene (PS) bilayer films were formed by thermal annealing due to the different thermal coefficients of expansion of each layer. The factors that influenced the dimensions of wrinkles were studied. We found that oriented wrinkles could be formed if the bilayer films were patterned with micro-grooves, and the degree of the orientation depended on the thickness of the PDA and the dimensions of the grooves. Combined with the strong adhesion, biocompatibility and reactivity of PDA, the oriented wrinkles on PDA/PS patterned bilayers may find potential application in diffraction gratings, optical sensors and microfluidic devices.
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Affiliation(s)
- Rong Wang
- Beijing National Laboratory for Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yuhua Long
- Beijing National Laboratory for Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Tang Zhu
- Beijing National Laboratory for Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jing Guo
- Beijing National Laboratory for Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Chao Cai
- Beijing National Laboratory for Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Ning Zhao
- Beijing National Laboratory for Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
| | - Jian Xu
- Beijing National Laboratory for Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
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8
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Ji H, Zhao Y, Zong C, Xie J, Han X, Wang J, Zhao J, Jiang S, Cao Y, Lu C. Simple and Versatile Strategy to Prevent Surface Wrinkling by Visible Light Irradiation. ACS APPLIED MATERIALS & INTERFACES 2016; 8:19127-19134. [PMID: 27381742 DOI: 10.1021/acsami.6b04868] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A stiff film bonded to a compliant substrate is susceptible to surface wrinkling when it is subjected to in-plane compression. Prevention of surface wrinkling is essential in many cases to maintain the integrity and functionality of this kind of system. Here we report a simple versatile technique to restrain surface wrinkling of an amorphous poly(p-aminoazobenzene) (PAAB) film by visible light irradiation. The key idea is to use the combined effects of photosoftening of the PAAB film and the stress release induced by the reversible photoisomerization. The main finding given by experiments and dimensional analysis is that the elastic modulus Ef of the film is well modulated by the ratio of light intensity and the release rate, i.e., I/V. Furthermore, the explicit solution describing the correlation of I/V with Ef is derived for the first time. The difference between the calculated critical wrinkling strain εc,t based on Ef and the experimentally measured value εc enables us to quantitatively evaluate the release amount of the compressive stress in the film. These key solutions provide a simple strategy to prevent the undesired surface wrinkling. Additionally, they allow us to propose a wrinkling-based technique to investigate photoinduced changes in the mechanical properties of azo-containing materials.
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Affiliation(s)
- Haipeng Ji
- School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, China
| | - Yan Zhao
- AML, Department of Engineering Mechanics, Tsinghua University , Beijing, 100084, China
| | - Chuanyong Zong
- School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, China
| | - Jixun Xie
- School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, China
| | - Xue Han
- School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, China
| | - Juanjuan Wang
- School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, China
| | - Jingxin Zhao
- School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, China
| | - Shichun Jiang
- School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, China
| | - Yanping Cao
- AML, Department of Engineering Mechanics, Tsinghua University , Beijing, 100084, China
| | - Conghua Lu
- School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, China
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9
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Takeshima T, Liao WY, Nagashima Y, Beppu K, Hara M, Nagano S, Seki T. Photoresponsive Surface Wrinkle Morphologies in Liquid Crystalline Polymer Films. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01577] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takahiro Takeshima
- Department of Molecular
Design and Engineering, Graduate School of Engineering, and ‡Venture Business
Laboratory, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Wan-yu Liao
- Department of Molecular
Design and Engineering, Graduate School of Engineering, and ‡Venture Business
Laboratory, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Yuki Nagashima
- Department of Molecular
Design and Engineering, Graduate School of Engineering, and ‡Venture Business
Laboratory, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Koichiro Beppu
- Department of Molecular
Design and Engineering, Graduate School of Engineering, and ‡Venture Business
Laboratory, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Mitsuo Hara
- Department of Molecular
Design and Engineering, Graduate School of Engineering, and ‡Venture Business
Laboratory, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Shusaku Nagano
- Department of Molecular
Design and Engineering, Graduate School of Engineering, and ‡Venture Business
Laboratory, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Takahiro Seki
- Department of Molecular
Design and Engineering, Graduate School of Engineering, and ‡Venture Business
Laboratory, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
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10
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Rodríguez-Hernández J. Wrinkled interfaces: Taking advantage of surface instabilities to pattern polymer surfaces. Prog Polym Sci 2015. [DOI: 10.1016/j.progpolymsci.2014.07.008] [Citation(s) in RCA: 218] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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11
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Rodríguez-Hernández J, del Campo A. Fabrication of hierarchical wrinkled morphologies through sequential UVO treatments. J Appl Polym Sci 2015. [DOI: 10.1002/app.41863] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Juan Rodríguez-Hernández
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC); C/Juan de la Cierva 3 28006 Madrid Spain
| | - Adolfo del Campo
- Instituto de Cerámica y Vidrio (ICV-CSIC); C/Kelsen 5, 28049-Madrid Spain
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12
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Koskela JE, Vapaavuori J, Ras RHA, Priimagi A. Light-Driven Surface Patterning of Supramolecular Polymers with Extremely Low Concentration of Photoactive Molecules. ACS Macro Lett 2014; 3:1196-1200. [PMID: 35610824 DOI: 10.1021/mz500616q] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Light-induced surface patterning in azobenzene-containing polymers and other materials is a widely studied phenomenon with possible applications in fields ranging from photonics to biology. Yet, the fundamental understanding of this purely photodriven mass transport remains inadequate, and existing literature fails to define a threshold chromophore content for mass transport to occur, if such a limit exists. This letter presents a systematic study of the relationship between chromophore concentration and mass transport using hydrogen-bonded polymer-azobenzene complexes, in which the chromophore concentration can be freely adjusted while keeping the polymer backbone unchanged. Essentially, we demonstrate that effective surface patterning can be induced even at an extremely low chromophore content of 1 mol %, when only every tenth polymer chain carries a single azobenzene molecular motor. Importantly, the results highlight the extraordinary photomechanical power of azobenzene and contribute to the fundamental understanding of the light-induced motions.
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Affiliation(s)
- Jenni E. Koskela
- Department
of Applied Physics, Aalto University, P.O. Box 15100, FI-00076 Aalto, Espoo, Finland
| | - Jaana Vapaavuori
- Département
de Chimie, Université de Montréal, C. P. 6128, succursale centre-ville, Montréal, QC H3C 3J7, Canada
- Centre de Recherche
sur les Matériaux Auto-Assemblés (CRMAA/CSACS), Montréal, QC Canada
| | - Robin H. A. Ras
- Department
of Applied Physics, Aalto University, P.O. Box 15100, FI-00076 Aalto, Espoo, Finland
| | - Arri Priimagi
- Department
of Applied Physics, Aalto University, P.O. Box 15100, FI-00076 Aalto, Espoo, Finland
- Department
of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FI-33101 Tampere, Finland
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13
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Fabrication of Functional Wrinkled Interfaces from Polymer Blends: Role of the Surface Functionality on the Bacterial Adhesion. Polymers (Basel) 2014. [DOI: 10.3390/polym6112845] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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14
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Palacios-Cuesta M, Liras M, del Campo A, García O, Rodríguez-Hernández J. Versatile approach for the fabrication of functional wrinkled polymer surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:13244-13254. [PMID: 25316583 DOI: 10.1021/la502913w] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A simple and versatile approach to obtaining patterned surfaces via wrinkle formation with variable dimensions and functionality is described. The method consists of the simultaneous heating and irradiation with UV light of a photosensitive monomer solution confined between two substrates with variable spacer thicknesses. Under these conditions, the system is photo-cross-linked, producing a rapid volume contraction while capillary forces attempt to maintain the contact between the monomer mixture and the cover. As a result of these two interacting forces, surface wrinkles were formed. Several parameters play a key role in the formation and final characteristics (amplitude and period) of the wrinkles generated, including the formulation of the photosensitive solution (e.g., the composition of the monomer mixture) and preparation conditions (e.g., temperature employed, irradiation time, and film thickness). Finally, in addition, the possibility of modifying the surface chemical composition of these wrinkled surfaces was investigated. For this purpose, either hydrophilic or hydrophobic comonomers were included in the photosensitive mixture. The resulting surface chemical composition could be finely tuned as was demonstrated by significant variations in the wettability of the structured surfaces, between 56° and 104°, when hydrophilic and hydrophobic monomers were incorporated, respectively.
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Affiliation(s)
- Marta Palacios-Cuesta
- Department of Chemistry and Properties of Polymers, Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC) , Juan de la Cierva 3, 28006 Madrid, Spain
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