1
|
Luo L, Tang Z, Yang W, Liu D, Shen Z, Fan XH. Thickness-Dependent Photo-Aligned Thin-Film Morphologies of a Block Copolymer Containing an Azobenzene-Based Liquid Crystalline Polymer and a Poly(ionic liquid). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:9774-9784. [PMID: 34342997 DOI: 10.1021/acs.langmuir.1c01314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photo-induced alignment of the thin-film morphologies of azobenzene-containing block copolymers (BCPs) is an effective method to obtain a uniaxial pattern of nanocylinders. Although film thickness is an important factor affecting the self-assembly of BCP thin films, the influence of film thickness on the photo-induced alignment of BCP thin-film morphology has never been systematically studied. Herein, we report the thickness-dependent photo-aligned film morphologies of the BCP containing an azobenzene-based liquid crystalline polymer and a poly(ionic liquid) (PIL), with a perfect uniaxial pattern of PIL nanocylinders. For films aligned with the unpolarized light (UPL), the out-of-plane PIL nanocylinders can be obtained in the film with a thickness of only 1L0 (∼30 nm, where L0 is the layer spacing of the hexagonally packed cylinder array), which is far lower than the thickness (more than 4L0) of the thermally annealed film needed to obtain the same morphology. This change is attributed to the orientation effect of UPL on azobenzene mesogens that suppresses the excluded volume effect. For the films aligned with linearly polarized light (LPL), to take advantage of the excluded volume effect to obtain the planar orientation of azobenzene mesogens, the thickness should be controlled to be no more than 3L0 to achieve an in-plane uniaxial alignment of PIL nanocylinders. The above relationship between the morphology and thickness of photo-aligned film eliminates the obstacles encountered in preparing films with well-ordered photo-aligned morphologies.
Collapse
Affiliation(s)
- Longfei Luo
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zhehao Tang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Weilu Yang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Dong Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zhihao Shen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xing-He Fan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| |
Collapse
|
2
|
Luo L, Lyu X, Tang Z, Shen Z, Fan XH. Thin-Film Self-Assembly of Block Copolymers Containing an Azobenzene-Based Liquid Crystalline Polymer and a Poly(ionic liquid). Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01063] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Longfei Luo
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xiaolin Lyu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zhehao Tang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zhihao Shen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xing-He Fan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| |
Collapse
|
3
|
Yang JK, Kwak SY, Jeon SJ, Lee E, Ju JM, Kim HI, Lee YS, Kim JH. Proteolytic disassembly of peptide-mediated graphene oxide assemblies for turn-on fluorescence sensing of proteases. NANOSCALE 2016; 8:12272-12281. [PMID: 27271225 DOI: 10.1039/c6nr02815b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Molecule-induced assembly of nanomaterials can alter their unique chemical and physical properties, which can be a promising approach for sensing. Herein, we demonstrate an optical 'turn-on' biosensor for the detection of matrix metalloproteinase-2 (MMP-2), fabricated by means of a peptide-induced assembly of fluorescent graphene oxide (GO). Functionalization of GO with a peptide substrate for MMP-2 bearing a thiol group leads to its self-assembly via disulfide bonding, accompanied by self-quenching of GO's strong fluorescence. This peptide-induced GO assembly is then disassembled by proteolytic cleavage in the presence of MMP-2, thereby restoring the level of self-quenched GO fluorescence. With this approach, we are able to detect MMP-2 and to investigate the kinetic parameters of MMP-2 activity. The GO-peptide assembly is successfully applied to the selective and sensitive detection of MMP-2 secreted by living cells, human hepatocytes HepG2, at a concentration of 2 ng mL(-1).
Collapse
Affiliation(s)
- Jin-Kyoung Yang
- School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744, Republic of Korea.
| | - Seon-Yeong Kwak
- Department of Chemical Engineering, Hanyang University, Ansan 426-791, Republic of Korea.
| | - Su-Ji Jeon
- Department of Chemical Engineering, Hanyang University, Ansan 426-791, Republic of Korea.
| | - Eunjin Lee
- School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744, Republic of Korea.
| | - Jong-Min Ju
- Department of Chemical Engineering, Hanyang University, Ansan 426-791, Republic of Korea.
| | - Hye-In Kim
- Department of Chemical Engineering, Hanyang University, Ansan 426-791, Republic of Korea.
| | - Yoon-Sik Lee
- School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744, Republic of Korea.
| | - Jong-Ho Kim
- Department of Chemical Engineering, Hanyang University, Ansan 426-791, Republic of Korea.
| |
Collapse
|
4
|
Wei C, Chen M, Liu D, Zhou W, Khan M, Wu X, Huang N, Li L. Synthesis of recyclable, chemically cross-linked, high toughness, high conductivity ion gels by sequential triblock copolymer self-assembly and disulfide bond cross-linking. RSC Adv 2015. [DOI: 10.1039/c4ra15095c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We reported the synthesis of a high toughness, high conductivity ion gels by a sequential triblock copolymer self-assembly and disulfide bond cross-linking, combining the high toughness of chemical with recyclability of physical cross-linking ones.
Collapse
Affiliation(s)
- Chengsha Wei
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- China
| | - Mingming Chen
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- China
| | - Dong Liu
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- China
| | - Weiming Zhou
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- China
| | - Majid Khan
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- China
| | - Xibo Wu
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- China
| | - Ningdong Huang
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- China
| | - Liangbin Li
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- China
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
| |
Collapse
|
5
|
Wei C, Chen M, Liu D, Zhou W, Khan M, Wu X, Huang N, Li L. A recyclable disulfide bond chemically cross-linking, high toughness, high conductivity ion gel based on re-shaping and restructuring in the gel state. Polym Chem 2015. [DOI: 10.1039/c5py00366k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the recyclability of a disulfide bond cross-linking ion gel with high toughness and ionic conductivity based on re-shaping and restructuring in the gel state.
Collapse
Affiliation(s)
- Chengsha Wei
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- China
| | - Mingming Chen
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- China
| | - Dong Liu
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- China
| | - Weiming Zhou
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- China
| | - Majid Khan
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- China
| | - Xibo Wu
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- China
| | - Ningdong Huang
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- China
| | - Liangbin Li
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- China
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology
| |
Collapse
|