1
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Tanaka M, Tsuboi Y, Yuyama KI. Formation of a core-shell droplet in a thermo-responsive ionic liquid/water mixture by using optical tweezers. Chem Commun (Camb) 2022; 58:11787-11790. [PMID: 36168832 DOI: 10.1039/d2cc02699f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Many chemical and biological processes involve phase separation; however, controlling this is challenging. Here, we demonstrate local phase separation using optical tweezers in a thermo-responsive ionic liquid/water solution. Upon near-infrared laser irradiation, a single droplet is formed at the focal spot. The droplet has a core consisting of highly concentrated ionic liquid. The mechanism of the core-shell droplet formation is discussed in view of the spatial distribution of optical and thermal potentials.
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Affiliation(s)
- Maho Tanaka
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto Sumiyoshi-ku, Osaka-shi, 558-8585, Japan.
| | - Yasuyuki Tsuboi
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto Sumiyoshi-ku, Osaka-shi, 558-8585, Japan.
| | - Ken-Ichi Yuyama
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto Sumiyoshi-ku, Osaka-shi, 558-8585, Japan.
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2
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Setoura K, Ito S. Optical manipulation in conjunction with photochemical/photothermal responses of materials. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C: PHOTOCHEMISTRY REVIEWS 2022. [DOI: 10.1016/j.jphotochemrev.2022.100536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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3
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Takao R, Ushiro K, Kusano H, Yuyama K, Shoji T, Linklater DP, Ivanova E, Juodkazis S, Tsuboi Y. Fluorescence Colour Control in Perylene‐Labeled Polymer Chains Trapped by Nanotextured Silicon. Angew Chem Int Ed Engl 2022; 61:e202117227. [DOI: 10.1002/anie.202117227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Indexed: 12/12/2022]
Affiliation(s)
- Ryota Takao
- Department of Chemistry Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan
| | - Kenta Ushiro
- Department of Chemistry Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan
| | - Hazuki Kusano
- Department of Chemistry Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan
| | - Ken‐ichi Yuyama
- Department of Chemistry Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan
| | - Tatsuya Shoji
- Department of Chemistry Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan
- Department of Chemistry Kanagawa University 2946 Tsuchiya Hiratsuka 259-1293 Japan
| | - Denver P. Linklater
- College of STEM School of Science RMIT University Melbourne VIC 3000 Australia
| | - Elena Ivanova
- College of STEM School of Science RMIT University Melbourne VIC 3000 Australia
| | - Saulius Juodkazis
- Optical Sciences Center and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM) Swinburne University of Technology John Street Hawthorn VIC 3122 Australia
- World Research Hub Initiative (WRHI) School of Materials and Chemical Technology Tokyo Institute of Technology 2-12-1, Ookayama, Meguro-ku Tokyo 152-8550 Japan
| | - Yasuyuki Tsuboi
- Department of Chemistry Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan
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4
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Takao R, Ushiro K, Kusano H, Yuyama K, Shoji T, Linklater DP, Ivanova E, Juodkazis S, Tsuboi Y. Fluorescence Colour Control in Perylene‐Labeled Polymer Chains Trapped by Nanotextured Silicon. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ryota Takao
- Department of Chemistry Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan
| | - Kenta Ushiro
- Department of Chemistry Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan
| | - Hazuki Kusano
- Department of Chemistry Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan
| | - Ken‐ichi Yuyama
- Department of Chemistry Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan
| | - Tatsuya Shoji
- Department of Chemistry Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan
- Department of Chemistry Kanagawa University 2946 Tsuchiya Hiratsuka 259-1293 Japan
| | - Denver P. Linklater
- College of STEM School of Science RMIT University Melbourne VIC 3000 Australia
| | - Elena Ivanova
- College of STEM School of Science RMIT University Melbourne VIC 3000 Australia
| | - Saulius Juodkazis
- Optical Sciences Center and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM) Swinburne University of Technology John Street Hawthorn VIC 3122 Australia
- World Research Hub Initiative (WRHI) School of Materials and Chemical Technology Tokyo Institute of Technology 2-12-1, Ookayama, Meguro-ku Tokyo 152-8550 Japan
| | - Yasuyuki Tsuboi
- Department of Chemistry Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan
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5
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Abstract
When an intense 1,064-nm continuous-wave laser is tightly focused at solution surfaces, it exerts an optical force on molecules, polymers, and nanoparticles (NPs). Initially, molecules and NPs are gathered into a single assembly inside the focus, and the laser is scattered and propagated through the assembly. The expanded laser further traps them at the edge of the assembly, producing a single assembly much larger than the focus along the surface. Amino acids and inorganic ionic compounds undergo crystallization and crystal growth, polystyrene NPs form periodic arrays and disklike structures with concentric circles or hexagonal packing, and Au NPs demonstrate assembling and swarming, in which the NPs fluctuate like a group of bees. These phenomena that depend on laser polarization are called optically evolved assembling at solution surfaces, and their dynamics and mechanisms are elucidated in this review. As a promising application in materials science, the optical trapping assembly of lead halide perovskites, supramolecules, and aggregation-induced emission enhancement-active molecules is demonstrated and future directions for fundamental study are discussed.
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Affiliation(s)
- Hiroshi Masuhara
- Department of Applied Chemistry and Center for Emergent Functional Matter Science, National Chiao Tung University, Hsinchu 30010, Taiwan;
| | - Ken-Ichi Yuyama
- Department of Chemistry, Osaka City University, Osaka 558-8585, Japan;
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6
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Miura A, Nohara R, Nojima A, Kitamura N. Laser-Induced Single-Molecule Extraction and Detection in Aqueous Poly( N-isopropylacrylamide)/1-Butanol Solutions. Anal Chem 2021; 93:3202-3208. [PMID: 33539072 DOI: 10.1021/acs.analchem.0c04673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report photothermal phase separation of aqueous poly(N-isopropylacrylamide) (PNIPAM)/1-butanol (BuOH) solutions by focused 1064 nm laser irradiation and subsequent single microparticle formation in the solution. The single microparticle [diameter = ∼10 μm and volume = ∼picoliter (pL)] produced by laser irradiation was optically trapped by the incident 1064 nm laser beam, and this enabled us in situ Raman/fluorescence microspectroscopies of the particle. Raman spectroscopy demonstrated that the particle produced by laser irradiation was composed of PNIPAM and BuOH. In the presence of rhodamine B (RhB) in the solution, RhB was distributed from the water phase to the PNIPAM/BuOH microparticle produced by laser irradiation, as confirmed by fluorescence microspectroscopy. Laser-induced distribution/extraction of RhB to a single PNIPAM/BuOH microparticle was shown to be possible at the RhB concentration as low as 10-14 mol/dm3, where the RhB fluorescence intensity from the particle showed a step-by-step increase by every ∼3 min laser irradiation. This is the first demonstration of laser-induced simultaneous extraction and detection of single RhB molecules in solution.
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Affiliation(s)
- Atsushi Miura
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.,Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Riku Nohara
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Azumi Nojima
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Noboru Kitamura
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.,Toyota Physical and Chemical Research Institute, Nagakute 480-1192, Aichi, Japan
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7
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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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8
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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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9
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SHOJI T, TSUBOI Y. Raman Microspectroscopic Studies on Thermo-Responsive Polymer Rich Domains Formed by Optical Tweezers. KOBUNSHI RONBUNSHU 2018. [DOI: 10.1295/koron.2017-0087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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10
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Ju L, Qin T, Zhang T, Wang P, Sheng L, Xiao-An Zhang S. Water-soluble and adjustable fluorescence copolymers containing a hydrochromic dye: synthesis, characterization and properties. RSC Adv 2018; 8:13664-13670. [PMID: 35539349 PMCID: PMC9079821 DOI: 10.1039/c8ra01306c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Accepted: 03/21/2018] [Indexed: 02/01/2023] Open
Abstract
Water solubility and adjustable fluorescence properties have been successfully implemented in the hydrochromic amino rhodamine via copolymerization. Four copolymers have been synthesized and clearly characterized by UV-Vis spectroscopy, proving greater detail than the commonly used NMR and IR technologies. The four copolymers have good solubility in pure water and in many common organic solvents, while preserving the hydrochromism of the dye monomer. Based on aggregation and dispersion of the copolymers as adjusted by solvent media and temperature, reversible fluorescence properties were successfully realized. Furthermore, their luminescence in solid state was observed. These studies are of great significance for expanding the application of hydrochromic dyes in biological fields and promoting green industrialization. Water solubility and adjustable fluorescence adjustable properties have been successfully endowed to established in a hydrochromic dye via copolymerization.![]()
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Affiliation(s)
- Le Ju
- College of Chemistry
- Jilin University
- Changchun
- China
- Department of Chemistry and Pharmacy
| | - Tianyou Qin
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Ting Zhang
- State Key Lab of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Peng Wang
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Lan Sheng
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Sean Xiao-An Zhang
- Department of Chemistry and Pharmacy
- Zhuhai College of Jilin University
- Zhuhai
- China
- State Key Lab of Supramolecular Structure and Materials
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11
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Kitamura N, Konno K, Ishizaka S. Laser-Induced Single Microdroplet Formation and Simultaneous Water-to-Single Microdroplet Extraction/Detection in Aqueous 1-Butanol Solutions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20160401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Noboru Kitamura
- Department of Chemistry, Faculty of Science, Hokkaido University, Kita-10-Nishi-8, Kita-ku, Sapporo 060-0810
| | - Kumiko Konno
- Department of Chemistry, Faculty of Science, Hokkaido University, Kita-10-Nishi-8, Kita-ku, Sapporo 060-0810
| | - Shoji Ishizaka
- Department of Chemistry, Faculty of Science, Hokkaido University, Kita-10-Nishi-8, Kita-ku, Sapporo 060-0810
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12
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Lee WF, Liu PY. Preparation and properties of novel photoluminescent thermosensitive hydrogels containing a pyrene group. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-017-1188-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Chiang WY, Okuhata T, Usman A, Tamai N, Masuhara H. Efficient Optical Trapping of CdTe Quantum Dots by Femtosecond Laser Pulses. J Phys Chem B 2014; 118:14010-6. [DOI: 10.1021/jp502524f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Wei-Yi Chiang
- Department
of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, 1001 Ta Hsueh Rd., Hsinchu 30010, Taiwan
| | - Tomoki Okuhata
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan
| | - Anwar Usman
- Solar
and Photovoltaic Engineering Research Center, Division of Physical
Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Naoto Tamai
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan
| | - Hiroshi Masuhara
- Department
of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, 1001 Ta Hsueh Rd., Hsinchu 30010, Taiwan
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14
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Lou SF, Wang L, Williams GR, Nie H, Quan J, Zhu L. Galactose functionalized injectable thermoresponsive microgels for sustained protein release. Colloids Surf B Biointerfaces 2014; 113:368-74. [DOI: 10.1016/j.colsurfb.2013.08.045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 08/02/2013] [Accepted: 08/29/2013] [Indexed: 12/28/2022]
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15
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Lou SF, Zhang H, Williams GR, Branford-White C, Nie HL, Quan J, Zhu LM. Fabrication and aggregation of thermoresponsive glucose-functionalized double hydrophilic copolymers. Colloids Surf B Biointerfaces 2013; 105:180-6. [DOI: 10.1016/j.colsurfb.2012.12.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 12/13/2012] [Accepted: 12/13/2012] [Indexed: 10/27/2022]
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16
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Sugiyama T, Yuyama KI, Masuhara H. Laser trapping chemistry: from polymer assembly to amino acid crystallization. Acc Chem Res 2012; 45:1946-54. [PMID: 23094993 DOI: 10.1021/ar300161g] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Laser trapping has served as a useful tool in physics and biology, but, before our work, chemists had not paid much attention to this technique because molecules are too small to be trapped in solution at room temperature. In late 1980s, we demonstrated laser trapping of micrometer-sized particles, developed various methodologies for their manipulation, ablation, and patterning in solution, and elucidated their dynamics and mechanism. In the 1990s, we started laser trapping studies on polymers, micelles, dendrimers, and gold, as well as polymer nanoparticles. Many groups also reported laser trapping studies of nanoclusters, DNA, colloidal suspensions, etc. Following these research streams, we have explored new molecular phenomena induced by laser trapping. Gradient force leading to trapping, mass transfer by local heating, and molecular reorientation following laser polarization are intimately coupled with molecular cluster and aggregate formation due to their intermolecular interactions, which depend on whether the trapping position is at the interface/surface or in solution. In this Account, we summarize our systematic studies on laser trapping chemistry and present some new advances and our future perspectives. We describe the laser trapping of nanoparticles, polymers, and amino acid clusters in solution by focusing a continuous wave 1064 nm laser beam on the molecules of interest and consider their dynamics and mechanism. In dilute solution, nanoparticles with weak mutual interactions are individually trapped at the focal point, while laser trapping of nanoparticles in concentrated solution assembles and confines numerous particles at the focal spot. The assembly of polymers during their laser trapping extends out from the focal point because of the interpolymer interactions, heat transfer, and solvent flow. When the trapping laser is focused at an interface between a thin heavy water solution film of glycine and a glass substrate, the assembled molecules nucleate and evolve to a liquid-liquid phase separation, or they will crystallize if the trapping laser is focused on the solution surface. Laser trapping can induce spatiotemporally the liquid and solid nucleation of glycine, and the dense liquid droplet or crystal formed can grow to a bulk scale. We can control the polymorph of the formed glycine crystal selectively by tuning trapping laser polarization and power. These results provide a new approach to elucidate dynamics and mechanism of crystallization and are the fundamental basis for studying not only enantioselective crystallization but also confined polymerization, trapping dynamics by ultrashort laser pulses, and resonance effect in laser trapping.
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Affiliation(s)
- Teruki Sugiyama
- Instrument Technology Research Center, National Applied Research Laboratories, Hsinchu 30076, Taiwan
| | - Ken-ichi Yuyama
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Hiroshi Masuhara
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan
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17
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Optical trapping and polarization-controlled scattering of dielectric spherical nanoparticles by femtosecond laser pulses. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2011.11.015] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Inoue H, Katayama K, Iwai K, Miura A, Masuhara H. Conformational relaxation dynamics of a poly(N-isopropylacrylamide) aqueous solution measured using the laser temperature jump transient grating method. Phys Chem Chem Phys 2012; 14:5620-7. [DOI: 10.1039/c2cp40243b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Ito S, Tanaka Y, Yoshikawa H, Ishibashi Y, Miyasaka H, Masuhara H. Confinement of photopolymerization and solidification with radiation pressure. J Am Chem Soc 2011; 133:14472-5. [PMID: 21859111 DOI: 10.1021/ja200737j] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Controlling chemical reactions within a small space is a significant issue in chemistry, and methods to induce reactions within a desired position have various potential applications. Here we demonstrate localized, efficient photopolymerization by radiation pressure. We induced a one-photon UV polymerization of liquid acrylate solutions in the optical-trapping potential of a focused near-IR (NIR) laser beam, leading to the confinement of solidification to a minute space with dimensions smaller or equal to one-fifth of the wavelength of the NIR laser. Our approach can produce solidification volumes smaller than those achievable with conventional one-photon polymerization, thus enabling the production of tiny polymeric structures that are smaller than the diffraction limit of the trapping light. This is the first demonstration of a radiation pressure effect on a photochemical reaction.
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Affiliation(s)
- Syoji Ito
- Division of Frontier Materials Science, Graduate School of Engineering Science, and Center for Quantum Materials Science under Extreme Conditions, Osaka University, 1-3 Macikaneyama-cho, Toyonaka, Osaka 560-8531, Japan.
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20
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Ito S, Toitani N, Yamauchi H, Miyasaka H. Evaluation of radiation force acting on macromolecules by combination of Brownian dynamics simulation with fluorescence correlation spectroscopy. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2010; 81:061402. [PMID: 20866416 DOI: 10.1103/physreve.81.061402] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Indexed: 05/29/2023]
Abstract
The effect of optical gradient force from a focused laser beam on the fluorescence correlation spectroscopy (FCS) was investigated by a computing method based on Brownian dynamics simulation. A series of calculations revealed that, in relatively shallow optical force potential up to 1.0kTR (TR=298.15 K), the conventional theoretical model of FCS without consideration of the optical gradient force could evaluate the increase in the average number of molecules and the diffusion time in the potential. On the other hand, large deviation between the simulated fluorescence correlation curve and the theoretical model was observed under the potential depth >1.0kTR. In addition, by integrating the optical force potential with the temperature elevation under optical trapping condition, it was deduced that the temperature rise does not seriously affect the average number of particles in the sampling area, but the average residence time is more sensitively affected by the temperature elevation. The present study using the simulation also provides a method to experimentally estimate molecular polarizabilities from FCS measurements.
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Affiliation(s)
- Syoji Ito
- Division of Frontier Materials Science, Graduate School of Engineering Science and Center for Quantum Materials Science under Extreme Conditions, Osaka University, Toyonaka, Osaka 560-8531, Japan.
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21
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Sugiyama T, Adachi T, Masuhara H. Crystal Growth of Glycine Controlled by a Focused CW Near-infrared Laser Beam. CHEM LETT 2009. [DOI: 10.1246/cl.2009.482] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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Synthesis, characterization and self-assembly behavior in water as fluorescent sensors of cationic water-soluble conjugated polyfluorene-b-poly(N-isopropylacrylamide) diblock copolymers. POLYMER 2009. [DOI: 10.1016/j.polymer.2008.12.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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23
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Tsuboi Y, Nishino M, Matsuo Y, Ijiro K, Kitamura N. Phase Separation of Aqueous Poly(vinyl methyl ether) Solutions Induced by the Photon Pressure of a Focused Near-Infrared Laser Beam. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.1926] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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24
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Roeffaers MBJ, De Cremer G, Uji-i H, Muls B, Sels BF, Jacobs PA, De Schryver FC, De Vos DE, Hofkens J. Single-molecule fluorescence spectroscopy in (bio)catalysis. Proc Natl Acad Sci U S A 2007; 104:12603-9. [PMID: 17664433 PMCID: PMC1937513 DOI: 10.1073/pnas.0610755104] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The ever-improving time and space resolution and molecular detection sensitivity of fluorescence microscopy offer unique opportunities to deepen our insights into the function of chemical and biological catalysts. Because single-molecule microscopy allows for counting the turnover events one by one, one can map the distribution of the catalytic activities of different sites in solid heterogeneous catalysts, or one can study time-dependent activity fluctuations of individual sites in enzymes or chemical catalysts. By experimentally monitoring individuals rather than populations, the origin of complex behavior, e.g., in kinetics or in deactivation processes, can be successfully elucidated. Recent progress of temporal and spatial resolution in single-molecule fluorescence microscopy is discussed in light of its impact on catalytic assays. Key concepts are illustrated regarding the use of fluorescent reporters in catalytic reactions. Future challenges comprising the integration of other techniques, such as diffraction, scanning probe, or vibrational methods in single-molecule fluorescence spectroscopy are suggested.
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Affiliation(s)
- Maarten B. J. Roeffaers
- *Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium
| | - Gert De Cremer
- *Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium
| | - Hiroshi Uji-i
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium; and
| | - Benîot Muls
- Department of Chemistry, Université Catholique de Louvain, Place L. Pasteur 1, B-1348 Louvain-la-Neuve, Belgium
| | - Bert F. Sels
- *Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium
| | - Pierre A. Jacobs
- *Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium
| | - Frans C. De Schryver
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium; and
| | - Dirk E. De Vos
- *Department of Microbial and Molecular Systems, Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium
- To whom correspondence may be addressed. E-mail: or
| | - Johan Hofkens
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium; and
- To whom correspondence may be addressed. E-mail: or
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25
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Ito S, Sugiyama T, Toitani N, Katayama G, Miyasaka H. Application of Fluorescence Correlation Spectroscopy to the Measurement of Local Temperature in Solutions under Optical Trapping Condition. J Phys Chem B 2007; 111:2365-71. [PMID: 17288469 DOI: 10.1021/jp065156l] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Fluorescence correlation spectroscopy (FCS) was applied to the quantitative evaluation of the local heating in small domains <1 microm in solutions under the laser trapping condition in the presence of a near-infrared (NIR) laser beam at 1064 nm. On the basis of the translational diffusion coefficient of fluorescent molecules obtained by FCS, the relationship between temperature rise and the incident NIR laser power, DeltaT/DeltaP, were determined to be 62 +/- 6, 49 +/- 7, and 23 +/- 1 deg K/W in ethylene glycol, ethanol, and water, respectively, while no remarkable temperature increase was observed for deuterated water. The value of DeltaT/DeltaP linearly increased as a function of alpha/lambda (alpha is the extinction coefficient of solvent at the wavelength and lambda is the thermal conductivity of the medium). The validity and the applicability of the present method for the measurement of the local temperature increase were discussed by comparing the present results with previous ones by other various methods.
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Affiliation(s)
- Syoji Ito
- Division of Frontier Materials Science, Graduate School of Engineering Science and Center for Quantum Materials Science under Extreme Conditions, Osaka University, Toyonaka, Osaka 560-8531, Japan.
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26
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Nabetani Y, Yoshikawa H, Masuhara H. Selective Optical Trapping and Deposition of Polymer and Aromatic Molecules from Binary Mixed Solution. J Phys Chem B 2006; 110:21399-402. [PMID: 17064084 DOI: 10.1021/jp065628w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have demonstrated size-selective optical trapping and deposition of polymer and aromatic molecules from binary mixed solution. As a near-infrared laser beam is tightly focused in polystyrene and perylene mixed solution and dropped on a glass substrate, a molecular assembly is deposited at the laser focus and fixed on the substrate. The fluorescence spectrum of the deposited microassembly depends on the laser power; perylene monomer fluorescence is dominant in the case of high laser power, whereas excimer emission of perylene crystal is observed in the case of low laser power. This suggests that polystyrene molecules are preferentially deposited by focusing a higher laser power so that the ratio of polystyrene and perylene in the assembly can be controlled by laser power. This mechanism can be explained in view of the molecular size selectivity in optical trapping.
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Affiliation(s)
- Yu Nabetani
- Department of Applied Physics, Graduate School of Engineering, Osaka University, Yamada-oka 2-1, Suita, Osaka, 565-0861, Japan
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27
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Li G, Shi L, An Y, Zhang W, Ma R. Double-responsive core–shell–corona micelles from self-assembly of diblock copolymer of poly(t-butyl acrylate-co-acrylic acid)-b-poly(N-isopropylacrylamide). POLYMER 2006. [DOI: 10.1016/j.polymer.2006.04.041] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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28
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Masuo S, Yoshikawa H, Nothofer HG, Grimsdale AC, Scherf U, Müllen K, Masuhara H. Assembling and Orientation of Polyfluorenes in Solution Controlled by a Focused Near-Infrared Laser Beam. J Phys Chem B 2005; 109:6917-21. [PMID: 16851779 DOI: 10.1021/jp0441184] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ordered fibril- and particle-like assemblies of poly(2,7-(9,9-bis(2-ethylhexyl)fluorene)) can be formed by photon force of a focused near-infrared laser beam during the drying process of its tetrahydrofuran solution on a glass substrate. These formations have been achieved controllably by combining laser irradiation with convection in the cast solution; that is, when viscous drag of the solution in the convection is stronger than the photon force, the fibril-like assemblies can be formed. Molecular orientation in the assemblies differs from that in self-assembled fibril-like structures, and maybe it can be controlled by the polarization direction of the focused laser beam. We have demonstrated that the length and width of the assemblies can be controlled by the irradiation time, the laser power, the concentration of the solution, and the convection rate in the solution. On the other hand, when the viscous drag of the solution in the convection is weak compared to the photon force, particle-like assemblies in which molecular orientation is controlled by polarization direction are formed.
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Affiliation(s)
- Sadahiro Masuo
- Department of Applied Physics, Osaka University, Suita, Osaka, 565-0871, Japan
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29
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Tsuboi Y, Nishino M, Sasaki T, Kitamura N. Poly(N-Isopropylacrylamide) Microparticles Produced by Radiation Pressure of a Focused Laser Beam: A Structural Analysis by Confocal Raman Microspectroscopy Combined with a Laser-Trapping Technique. J Phys Chem B 2005; 109:7033-9. [PMID: 16851799 DOI: 10.1021/jp044894b] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We developed a confocal Raman microspectroscopy system combined with a laser trapping technique and applied it to aqueous solutions (H(2)O and D(2)O) of poly(N-isopropylacrylamide) (PNIPA), which is well-known as a representative thermo-responsive polymer, i.e., phase transition/separation between coiled and globular states. By introducing a near-infrared (1064 nm) laser beam into a microscope, PNIPA microparticles were produced at the focused spot of the laser beam, both in H(2)O and D(2)O. By using the present system, we succeeded in obtaining the Raman spectra of PNIPA in the coiled and globular states over a wide wavenumber region (800-3500 cm(-1)) for the first time. For the D(2)O solutions (in which the photothermal effect is negligible and hence the microparticles should be produced purely by the effect of radiation pressure), some significant differences were observed in the Raman spectra for the coiled state, in the globular state, and for laser induced microparticles. By analyzing these spectra in detail, we revealed that the structure of the laser-induced microparticles was analogous to that in the globular state. We also discuss the fundamental mechanism underlying the transformation of the higher order structure of a polymer by radiation pressure.
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Affiliation(s)
- Yasuyuki Tsuboi
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan.
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30
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Yoshikawa H, Matsui T, Masuhara H. Reversible assembly of gold nanoparticles confined in an optical microcage. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2004; 70:061406. [PMID: 15697361 DOI: 10.1103/physreve.70.061406] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2004] [Indexed: 05/24/2023]
Abstract
As optical trapping by a focused laser beam is applied for nanoparticles, multiple particles are grasped in the focal spot and make an assembly. Gold nanoparticles confined in such a submicrometer optical cage show a characteristic extinction spectrum depending on laser power. The spectral change can be induced reversibly and repeatedly by tuning the laser power, demonstrating that the assembly of gold nanoparticles can be controlled by the gradient force. This is attributed to the soft confinement of nanoparticles dressed in electrostatic potential barriers.
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Affiliation(s)
- Hiroyuki Yoshikawa
- Department of Applied Physics and Frontier Research Center, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.
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31
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Hosokawa C, Yoshikawa H, Masuhara H. Optical assembling dynamics of individual polymer nanospheres investigated by single-particle fluorescence detection. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2004; 70:061410. [PMID: 15697365 DOI: 10.1103/physreve.70.061410] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2004] [Indexed: 05/24/2023]
Abstract
When a laser beam is focused into colloidal nanoparticle suspensions, a number of nanoparticles can be confined in the focal spot due to an optical gradient force. To reveal the assembling dynamics of polymer nanoparticles, the assembling process was investigated by analyzing the time evolution of the fluorescence intensity of the nanoparticles. In a dilute suspension of 100-nm-sized particles, a stepwise increase of the fluorescence intensity corresponding to a trapped single nanoparticle was observed. Statistical analysis revealed that the initial assembling rate of nanoparticles was proportional to the laser power and concentration of particle suspensions as expected from the diffusion equation. In 40-nm-sized particle suspensions, blinking profiles of fluorescence intensity were obtained, in which 2-3 particles were simultaneously trapped and then escaped from the focal point. It is considered from statistical analyses and two-dimensional Monte Carlo simulations that this assembling phenomenon is attributable to cluster formation assisted by optical trapping.
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Affiliation(s)
- Chie Hosokawa
- Department of Applied Physics and Frontier Research Center, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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32
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Jose PP, Bagchi B. Formation of nanoclusters under radiation pressure in solution: A Brownian dynamics simulation study. J Chem Phys 2002. [DOI: 10.1063/1.1436121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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33
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Masuo S, Yoshikawa H, Asahi T, Masuhara H, Sato T, Jiang DL, Aida T. Repetitive Contraction and Swelling Behavior of Gel-like Wire-type Dendrimer Assemblies in Solution Layer by Photon Pressure of a Focused Near-infrared Laser Beam. J Phys Chem B 2002. [DOI: 10.1021/jp013367e] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Dol GC, Tsuda K, Weener JW, Bartels MJ, Asavei T, Gensch T, Hofkens J, Latterini L, Schenning APHJ, Meijer BW, De Schryver FC. Merging of Hard Spheres by Phototriggered Micromanipulation. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3773(20010504)40:9<1710::aid-anie17100>3.0.co;2-n] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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35
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Dol GC, Tsuda K, Weener JW, Bartels MJ, Asavei T, Gensch T, Hofkens J, Latterini L, Schenning APHJ, Meijer BW, De Schryver FC. Merging of Hard Spheres by Phototriggered Micromanipulation. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010504)113:9<1760::aid-ange17600>3.0.co;2-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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36
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37
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Smith TA, Hotta JI, Sasaki K, Masuhara H, Itoh Y. Photon Pressure-Induced Association of Nanometer-Sized Polymer Chains in Solution. J Phys Chem B 1999. [DOI: 10.1021/jp983691i] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Trevor A. Smith
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan, and Department of Functional Polymer Science, Faculty of Textile Science and Technology, Shinshu University, Tokida, Ueda, Nagano 386-8567, Japan
| | - Jun-ichi Hotta
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan, and Department of Functional Polymer Science, Faculty of Textile Science and Technology, Shinshu University, Tokida, Ueda, Nagano 386-8567, Japan
| | - Keiji Sasaki
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan, and Department of Functional Polymer Science, Faculty of Textile Science and Technology, Shinshu University, Tokida, Ueda, Nagano 386-8567, Japan
| | - Hiroshi Masuhara
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan, and Department of Functional Polymer Science, Faculty of Textile Science and Technology, Shinshu University, Tokida, Ueda, Nagano 386-8567, Japan
| | - Yoshihiro Itoh
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan, and Department of Functional Polymer Science, Faculty of Textile Science and Technology, Shinshu University, Tokida, Ueda, Nagano 386-8567, Japan
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38
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Gensch T, Hofkens J, van Stam J, Faes H, Creutz S, Tsuda K, Jérôme R, Masuhara H, De Schryver FC. Transmission and Confocal Fluorescence Microscopy and Time-Resolved Fluorescence Spectroscopy Combined with a Laser Trap: Investigation of Optically Trapped Block Copolymer Micelles. J Phys Chem B 1998. [DOI: 10.1021/jp9824104] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thomas Gensch
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, BE-3001 Heverlee, Belgium, Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman B6, BE-4000 Liège, Belgium, and Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
| | - Johan Hofkens
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, BE-3001 Heverlee, Belgium, Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman B6, BE-4000 Liège, Belgium, and Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
| | - Jan van Stam
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, BE-3001 Heverlee, Belgium, Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman B6, BE-4000 Liège, Belgium, and Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
| | - Herman Faes
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, BE-3001 Heverlee, Belgium, Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman B6, BE-4000 Liège, Belgium, and Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
| | - Serge Creutz
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, BE-3001 Heverlee, Belgium, Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman B6, BE-4000 Liège, Belgium, and Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
| | - Kenji Tsuda
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, BE-3001 Heverlee, Belgium, Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman B6, BE-4000 Liège, Belgium, and Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
| | - Robert Jérôme
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, BE-3001 Heverlee, Belgium, Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman B6, BE-4000 Liège, Belgium, and Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
| | - Hiroshi Masuhara
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, BE-3001 Heverlee, Belgium, Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman B6, BE-4000 Liège, Belgium, and Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
| | - Frans C. De Schryver
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, BE-3001 Heverlee, Belgium, Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman B6, BE-4000 Liège, Belgium, and Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan
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39
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Hotta JI, Sasaki K, Masuhara H, Morishima Y. Laser-Controlled Assembling of Repulsive Unimolecular Micelles in Aqueous Solution. J Phys Chem B 1998. [DOI: 10.1021/jp9825866] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jun-ichi Hotta
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan
| | - Keiji Sasaki
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroshi Masuhara
- Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yotaro Morishima
- Department of Macromolecular Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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