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Xu Y, Sun L, Ghiggino KP, Smith TA. Resolving conjugated polymer film morphology with polarised transmission and time-resolved emission microscopy. Methods Appl Fluoresc 2024; 12:035004. [PMID: 38537297 DOI: 10.1088/2050-6120/ad388f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 03/27/2024] [Indexed: 04/17/2024]
Abstract
The alignment of chromophores plays a crucial role in determining the optoelectronic properties of materials. Such alignment can make interpretation of fluorescence anisotropy microscopy (FAM) images somewhat ambiguous. The time-resolved emission behaviour can also influence the fluorescence anisotropy. This is particularly the case when probing excitation energy migration between chromophores in a condensed phase. Ideally information concerning the chromophoric alignment, emission decay kinetics and fluorescence anisotropy can be recorded and correlated. We report on the use of polarised transmission imaging (PTI) coupled with both steady-state and time-resolved FAM to enable accurate identification of chromophoric alignment and morphology in thin films of a conjugated polydiarylfluorene. We show that the combination of these three imaging modes presents a comprehensive methodology for investigating the alignment and morphology of chromophores in thin films, particularly for accurately mapping the distribution of amorphous and crystalline phases within the thin films, offering valuable insights for the design and optimization of materials with enhanced optoelectronic performance.
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Affiliation(s)
- Yang Xu
- Ultrafast and Microspectroscopy Laboratories, School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
- ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Lili Sun
- Centre for Supramolecular Optoelectronics (CSO), School of Flexible Electronics (Future Technologies) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing 211816, People's Republic of China
| | - Kenneth P Ghiggino
- Ultrafast and Microspectroscopy Laboratories, School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
- ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Trevor A Smith
- Ultrafast and Microspectroscopy Laboratories, School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
- ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
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Ameer-Beg S, Suhling K, Kuimova M. Special issue on fluorescence lifetime imaging (FLIM): from fundamentals to applications. Methods Appl Fluoresc 2020; 8:040401. [PMID: 33021203 DOI: 10.1088/2050-6120/abad19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Wang SF, Lin JR, Ishiwari F, Fukushima T, Masuhara H, Sugiyama T. Spatiotemporal Dynamics of Aggregation-Induced Emission Enhancement Controlled by Optical Manipulation. Angew Chem Int Ed Engl 2020; 59:7063-7068. [PMID: 32067329 DOI: 10.1002/anie.201916240] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/21/2020] [Indexed: 02/03/2023]
Abstract
We present spatiotemporal control of aggregation-induced emission enhancement (AIEE) of a protonated tetraphenylethene derivative by optical manipulation. A single submicrometer-sized aggregate is initially confined by laser irradiation when its fluorescence is hardly detectable. The continuous irradiation of the formed aggregate leads to sudden and rapid growth, resulting in bright yellow fluorescence emission. The fluorescence intensity at the peak wavelength of 540 nm is tremendously enhanced with growth, meaning that AIEE is activated by optical manipulation. Amazingly, the switching on/off of the activation of AIEE is arbitrarily controlled by alternating the laser power. This result means that optical manipulation increases the local concentration, which overcomes the electrostatic repulsion between the protonated molecules, namely, optical manipulation changes the aggregate structure. The dynamics and mechanism in AIEE controlled by optical manipulation will be discussed from the viewpoint of molecular conformation and association depending on the laser power.
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Affiliation(s)
- Shun-Fa Wang
- Department of Applied Chemistry, National Chiao Tung University, 1001 University Road, Hsinchu, 30010, Taiwan
| | - Jhao-Rong Lin
- Department of Applied Chemistry, National Chiao Tung University, 1001 University Road, Hsinchu, 30010, Taiwan
| | - Fumitaka Ishiwari
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, 226-8503, Japan
| | - Takanori Fukushima
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, 226-8503, Japan
| | - Hiroshi Masuhara
- Department of Applied Chemistry, National Chiao Tung University, 1001 University Road, Hsinchu, 30010, Taiwan.,Center for Emergent Functional Matter Science, National Chiao Tung University, Taiwan
| | - Teruki Sugiyama
- Department of Applied Chemistry, National Chiao Tung University, 1001 University Road, Hsinchu, 30010, Taiwan.,Center for Emergent Functional Matter Science, National Chiao Tung University, Taiwan.,Division of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara, 630-0192, Japan
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Wang S, Lin J, Ishiwari F, Fukushima T, Masuhara H, Sugiyama T. Spatiotemporal Dynamics of Aggregation‐Induced Emission Enhancement Controlled by Optical Manipulation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916240] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Shun‐Fa Wang
- Department of Applied Chemistry National Chiao Tung University 1001 University Road Hsinchu 30010 Taiwan
| | - Jhao‐Rong Lin
- Department of Applied Chemistry National Chiao Tung University 1001 University Road Hsinchu 30010 Taiwan
| | - Fumitaka Ishiwari
- Laboratory for Chemistry and Life Science Institute of Innovative Research Tokyo Institute of Technology Yokohama 226-8503 Japan
| | - Takanori Fukushima
- Laboratory for Chemistry and Life Science Institute of Innovative Research Tokyo Institute of Technology Yokohama 226-8503 Japan
| | - Hiroshi Masuhara
- Department of Applied Chemistry National Chiao Tung University 1001 University Road Hsinchu 30010 Taiwan
- Center for Emergent Functional Matter Science National Chiao Tung University Taiwan
| | - Teruki Sugiyama
- Department of Applied Chemistry National Chiao Tung University 1001 University Road Hsinchu 30010 Taiwan
- Center for Emergent Functional Matter Science National Chiao Tung University Taiwan
- Division of Materials Science Nara Institute of Science and Technology 8916-5 Takayama-cho, Ikoma Nara 630-0192 Japan
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