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Ito H, Yoshioka D, Hamada M, Okamoto T, Kobori Y, Kobayashi Y. Photochromism of colloidal ZnO nanocrystal powders under ambient conditions. PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES : OFFICIAL JOURNAL OF THE EUROPEAN PHOTOCHEMISTRY ASSOCIATION AND THE EUROPEAN SOCIETY FOR PHOTOBIOLOGY 2022; 21:1781-1791. [PMID: 35776411 DOI: 10.1007/s43630-022-00256-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 06/09/2022] [Indexed: 11/28/2022]
Abstract
Zinc oxide (ZnO) nanocrystals (NCs) exhibit photochromic reactions under specific conditions upon ultraviolet light irradiation. Since the color is originated from the excited electrons at the conduction band of ZnO NCs, the photoinduced absorption is observed only in the solution with hole acceptors under inert conditions. ZnO is earth-abundant and less toxic than many other substances, and has been widely used in various industrial fields. If the photochromic reaction of ZnO can be observed consistently under ambient conditions, the material may pave the way for large-scale photochromic applications such as in pigments, windows, and building materials in addition to conventional photochromic applications. In this study, we synthesize hydrophilic ZnO NCs and observe the solid-state photochromic reactions in the visible to mid-infrared regions even in humid-air conditions. We reveal that the coloration of powders of ZnO NCs under ambient conditions originates mainly from two factors: (1) charge separation induced by hole trapping by water molecules adsorbed on the surface of NCs, and (2) deceleration of the reactions involving the electrons in the conduction band of ZnO NCs with molecular oxygen and the adsorbed water molecules.
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Affiliation(s)
- Hiroki Ito
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan
| | - Daisuke Yoshioka
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan
| | - Morihiko Hamada
- Department of Applied Chemistry, Kobe City College of Technology, Kobe, 651-2194, Japan
| | - Tsubasa Okamoto
- Molecular Photoscience Research Center, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan.,Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan
| | - Yasuhiro Kobori
- Molecular Photoscience Research Center, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan.,Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan
| | - Yoichi Kobayashi
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan.
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2
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Noble Metal Promoted TiO2 from Silver-Waste Valorisation: Synergism between Ag and Au. Catalysts 2022. [DOI: 10.3390/catal12020235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Wastewaters from precious metal industries contain high amounts of noble metals, but their efficient recycling is hindered by the wastewater complex composition. Here, we propose an innovative approach for the efficient recovery of noble metals contained in these metal-enriched wastewaters as precursors for the synthesis of noble metal nanoparticles (NPs) and supported metal catalysts. Silver NPs were synthesized from Ag-enriched wastewater and then deposited on TiO2 to prepare photocatalysts. Then, further promotion of the photocatalytic activity of Ag-modified TiO2 was achieved by the addition of as little as 0.5 wt.% of Au. STEM-EDS analyses proved that Au NPs were located on Ag or AgOx nanoparticles. The contact between the two metal-containing NPs results in charge transfer effects, appreciable both in terms of oxidation states determined by XPS and of optical properties. In particular, the plasmon band of Au NPs shows photochromic effects: under UV light irradiation, bimetallic samples exhibit a blue-shift of the plasmon band, which is reversible under dark storage. The activity of the materials was tested towards ethanol photodegradation under UV light. Adding 0.5 wt.% Au NPs resulted in a promoted activity compared to Ag-TiO2, thus showing synergistic effects between Au and Ag. Ethanol was completely converted already after 1 h of UV irradiation, acetaldehyde was formed as the main oxidation product and fully degraded in less than 180 min. Notably, bimetallic samples showed ethylene formation by a parallel dehydration mechanism.
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3
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Sanada Y, Yoshioka D, Kobayashi Y. Origin of the Anomalous Temperature Dependence of the Photochromic Reaction of Cu-Doped ZnS Nanocrystals. J Phys Chem Lett 2021; 12:8129-8133. [PMID: 34410144 DOI: 10.1021/acs.jpclett.1c02386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The temperature dependence of the color fading process of thermally reversible photochromic reactions is one of the most important challenges for their industrial applications. Generally, photochromic reactions of organic molecules have a strong temperature dependence due to the occurrence of large conformational changes during the reactions. In contrast, we recently reported that the photochromic reaction of Cu-doped ZnS nanocrystals (NCs) exhibits a very small temperature dependence around room temperature. However, the mechanism underlying this phenomenon has not been clarified yet. Here, we reveal that the anomalous temperature dependence of Cu-doped ZnS NCs originates from the balance between the temperature dependence of the charge recombination and that of the adsorption/desorption of water molecules on the surface of the NCs, which act as hole acceptors. Exploring temperature-insensitive photochromic reactions is important not only for gaining fundamental insight into nanomaterials but also for developing novel photochromic materials for outdoor applications.
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Affiliation(s)
- Yusuke Sanada
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Daisuke Yoshioka
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Yoichi Kobayashi
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
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4
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Han Y, Hamada M, Chang IY, Hyeon-Deuk K, Kobori Y, Kobayashi Y. Fast T-Type Photochromism of Colloidal Cu-Doped ZnS Nanocrystals. J Am Chem Soc 2021; 143:2239-2249. [DOI: 10.1021/jacs.0c10236] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Yulian Han
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
| | - Morihiko Hamada
- Molecular Photoscience Research Center, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | - I-Ya Chang
- Department of Chemistry, Kyoto University, Kyoto 606-8502, Japan
| | - Kim Hyeon-Deuk
- Department of Chemistry, Kyoto University, Kyoto 606-8502, Japan
| | - Yasuhiro Kobori
- Molecular Photoscience Research Center, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657−8501, Japan
| | - Yoichi Kobayashi
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
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5
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Zinc rhodium oxide and its possibility as a constituent photocatalyst for carbon dioxide reduction using water as an electron source. Catal Today 2019. [DOI: 10.1016/j.cattod.2019.01.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Koneti S, Borges J, Roiban L, Rodrigues MS, Martin N, Epicier T, Vaz F, Steyer P. Electron Tomography of Plasmonic Au Nanoparticles Dispersed in a TiO 2 Dielectric Matrix. ACS APPLIED MATERIALS & INTERFACES 2018; 10:42882-42890. [PMID: 30457319 DOI: 10.1021/acsami.8b16436] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Plasmonic Au nanoparticles (AuNPs) embedded into a TiO2 dielectric matrix were analyzed by combining two-dimensional and three-dimensional electron microscopy techniques. The preparation method was reactive magnetron sputtering, followed by thermal annealing treatments at 400 and 600 °C. The goal was to assess the nanostructural characteristics and correlate them with the optical properties of the AuNPs, particularly the localized surface plasmon resonance (LSPR) behavior. High-angle annular dark field-scanning transmission electron microscopy results showed the presence of small-sized AuNPs (quantum size regime) in the as-deposited Au-TiO2 film, resulting in a negligible LSPR response. The in-vacuum thermal annealing at 400 °C induced the formation of intermediate-sized nanoparticles (NPs), in the range of 10-40 nm, which led to the appearance of a well-defined LSPR band, positioned at 636 nm. Electron tomography revealed that most of the NPs are small-sized and are embedded into the TiO2 matrix, whereas the larger NPs are located at the surface. Annealing at 600 °C promotes a bimodal size distribution with intermediate-sized NPs embedded in the matrix and big-sized NPs, up to 100 nm, appearing at the surface. The latter are responsible for a broadening and a redshift, to 645 nm, in the LSPR band because of increase of scattering-to-absorption ratio. Beyond differentiating and quantifying the surface and embedded NPs, electron tomography also provided the identification of "hot-spots". The presence of NPs at the surface, individual or in dimers, permits adsorption sites for LSPR sensing and for surface-enhanced spectroscopies, such as surface-enhanced Raman scattering.
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Affiliation(s)
- Siddardha Koneti
- Université Lyon, INSA-Lyon, MATEIS UMR CNRS 5510 , 21 Avenue Jean Capelle , 69621 Villeurbanne Cedex , France
| | - Joel Borges
- Centro de Física , Universidade do Minho , Campus de Gualtar , 4710 057 Braga , Portugal
| | - Lucian Roiban
- Université Lyon, INSA-Lyon, MATEIS UMR CNRS 5510 , 21 Avenue Jean Capelle , 69621 Villeurbanne Cedex , France
| | - Marco S Rodrigues
- Centro de Física , Universidade do Minho , Campus de Gualtar , 4710 057 Braga , Portugal
| | - Nicolas Martin
- Institut FEMTO-ST, UMR 6174 CNRS, Université Bourgogne Franche-Comté , 15B, Avenue des Montboucons , 25030 Besançon Cedex , France
| | - Thierry Epicier
- Université Lyon, INSA-Lyon, MATEIS UMR CNRS 5510 , 21 Avenue Jean Capelle , 69621 Villeurbanne Cedex , France
| | - Filipe Vaz
- Centro de Física , Universidade do Minho , Campus de Gualtar , 4710 057 Braga , Portugal
| | - Philippe Steyer
- Université Lyon, INSA-Lyon, MATEIS UMR CNRS 5510 , 21 Avenue Jean Capelle , 69621 Villeurbanne Cedex , France
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7
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Tanabe I, Kurawaki Y. Far-ultraviolet spectral changes of titanium dioxide with gold nanoparticles by ultraviolet and visible light. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 197:103-106. [PMID: 29133130 DOI: 10.1016/j.saa.2017.11.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 10/31/2017] [Accepted: 11/02/2017] [Indexed: 06/07/2023]
Abstract
Attenuated total reflectance spectra including the far-ultraviolet (FUV, ≤200nm) region of titanium dioxide (TiO2) with and without gold (Au) nanoparticles were measured. A newly developed external light-irradiation system enabled to observe spectral changes of TiO2 with Au nanoparticles upon light irradiations. Absorption in the FUV region decreased and increased by the irradiation with ultraviolet and visible light, respectively. These spectral changes may reflect photo-induced electron transfer from TiO2 to Au nanoparticles under ultraviolet light and from Au nanoparticles to TiO2 under visible light, respectively.
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Affiliation(s)
- Ichiro Tanabe
- Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 5608531, Japan.
| | - Yuji Kurawaki
- School of Science and Technology, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 6691337, Japan
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Kawamura S, Matsubara K, Sakai S, Sasaki K, Saito M, Saito K, Yagi M, Norimatsu W, Sasai R, Kusunoki M, Eguchi M, Yin S, Asakura Y, Yui T. Preparation of Stable Silver Nanoparticles Having Wide Red-To-Near-Infrared Extinction. GLOBAL CHALLENGES (HOBOKEN, NJ) 2018; 2:1700105. [PMID: 31565325 PMCID: PMC6607257 DOI: 10.1002/gch2.201700105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 01/12/2018] [Indexed: 05/11/2023]
Abstract
The synthesis of silver nanoparticles (AgNPs) within the interlayer space of transparent layered titania nanosheet (TNS) films is investigated. A considerable number of silver ions (≈70% against the cation exchange capacity of the TNS) are intercalated in the TNS films using methyl-viologen-containing TNSs as a precursor. The silver ion (Ag+)-containing TNS films are treated with aqueous sodium tetrahydroborate (NaBH4), resulting in a gradual color change to bright blue. Various structural analyses clearly show that crystalline AgNPs are generated within the interlayer space of the TNSs. The NaBH4-treated films show intense and characteristic near-infrared (NIR) extinction spectra up to 1800 nm. The stability of the AgNPs within the TNS against oxygen and moisture is also investigated, and 96% and 82% of the AgNPs remain after standing in air for 1 month and 1 year, respectively. The NIR extinctions of the AgNP-containing TNS films are further extended by employing different preparation procedures, for example, using sintered TNS films as starting materials and irradiating the Ag+-containing TNSs with ultraviolet (UV) light. The obtained AgNP-containing TNS films exhibit photochemical activities in the production of hydrogen from ammonia borane under visible-light irradiation and the decomposition of nitrogen monoxide under UV-light irradiation.
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Affiliation(s)
- Shiori Kawamura
- Department of Materials Science and TechnologyFaculty of EngineeringNiigata University8050 Ikarashi‐2Niigata950‐2181Japan
| | - Kazuki Matsubara
- Department of Materials Science and TechnologyFaculty of EngineeringNiigata University8050 Ikarashi‐2Niigata950‐2181Japan
| | - Sotaro Sakai
- Department of Materials Science and TechnologyFaculty of EngineeringNiigata University8050 Ikarashi‐2Niigata950‐2181Japan
| | - Kazuhisa Sasaki
- Department of Materials Science and TechnologyFaculty of EngineeringNiigata University8050 Ikarashi‐2Niigata950‐2181Japan
| | - Masataro Saito
- Department of Materials Science and TechnologyFaculty of EngineeringNiigata University8050 Ikarashi‐2Niigata950‐2181Japan
| | - Kenji Saito
- Department of Materials Science and TechnologyFaculty of EngineeringNiigata University8050 Ikarashi‐2Niigata950‐2181Japan
| | - Masayuki Yagi
- Department of Materials Science and TechnologyFaculty of EngineeringNiigata University8050 Ikarashi‐2Niigata950‐2181Japan
| | - Wataru Norimatsu
- Department of Materials ChemistryGraduate School of EngineeringNagoya UniversityFuro‐cho, Chikusa‐kuNagoya‐shiAichi‐ken464‐8603Japan
| | - Ryo Sasai
- Department of Physics and Materials ScienceInterdisciplinary Graduate School of Science and EngineeringShimane University1060, Nishi‐kawatsu‐choMatsue690‐8504Japan
| | - Michiko Kusunoki
- Institute of Materials and Systems for SustainabilityNagoya UniversityFuro‐cho, Chikusa‐kuNagoya‐shiAichi‐ken464‐8603Japan
| | - Miharu Eguchi
- Electronic Functional Materials GroupPolymer Materials UnitNational Institute for Materials Science (NIMS)1‐1 NamikiTsukubaIbaraki305‐0044Japan
| | - Shu Yin
- Institute of Multidisciplinary Research for Advanced MaterialsTohoku University2‐1‐1, KatahiraAoba‐kuSendai980‐8577Japan
| | - Yusuke Asakura
- Institute of Multidisciplinary Research for Advanced MaterialsTohoku University2‐1‐1, KatahiraAoba‐kuSendai980‐8577Japan
| | - Tatsuto Yui
- Department of Materials Science and TechnologyFaculty of EngineeringNiigata University8050 Ikarashi‐2Niigata950‐2181Japan
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9
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Talebi R. Investigating multicolour photochromic behaviour of AgCl and AgI thin films loaded with silver nanoparticles. Phys Chem Chem Phys 2018; 20:5734-5743. [PMID: 29411799 DOI: 10.1039/c7cp07923k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multicolour photochromic behaviour in light-sensitive Ag-AgCl and Ag-AgI thin films at room temperature was investigated and compared. Although it seemed that the Ag-Ag halide thin films have similar optical properties, their optical responses to a monochromatic laser beam are completely different. It is shown that Ag-AgCl thin film changes its colour under light irradiation to the same colour of the incident light, regardless of the polarization state of the laser beam. In contrast, the Ag-AgI thin film changes to complementary colours of the incident beam. The different optical behaviours of Ag-AgCl and Ag-AgI thin films are due to the different electrical properties of AgCl and AgI thin films. Moreover, the multicolour photochromic behaviour is due to the changes of absorption spectra and surface morphology of silver nanoparticles on silver-haide thin film. These changes are the result of excitation of localized surface plasmon resonance of silver nanoparticles by the laser beam and charge transfer between silver nanoparticles and silver-halide thin films.
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Affiliation(s)
- Razieh Talebi
- Department of Physics, University of Isfahan, 81746-73441, Isfahan, Iran.
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Lee SH, Nishi H, Tatsuma T. Plasmonic behaviour and plasmon-induced charge separation of nanostructured MoO 3-x under near infrared irradiation. NANOSCALE 2018; 10:2841-2847. [PMID: 29362747 DOI: 10.1039/c7nr09477a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Plasmon-induced charge separation (PICS) allows direct conversion of localized surface plasmon resonance (LSPR) to electron flows and photoelectrochemical reactions. However, PICS has only been achieved using plasmonic noble metal nanoparticles, not with compound nanoparticles. In order to achieve compound PICS, MoO3-x nanostructures were prepared that exhibit LSPR in the near infrared region by using metal oxides or metal nanoparticles as templates. Solid-state cells based on the MoO3-x nanostructure were developed. Their photoresponse to 700-1400 nm infrared light was investigated and analyzed on the basis of their PICS mechanisms.
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Affiliation(s)
- Seung Hyuk Lee
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.
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Hattori H, Eguchi M, Ide Y, Sano T. Enhanced Photocatalytic Activity of a Layered Titanate Achieved via Simple Mixing with TiO2-Based Photocatalysts as Additives. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20170231] [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)
- Hideya Hattori
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527
| | - Miharu Eguchi
- National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044
| | - Yusuke Ide
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044
| | - Tsuneji Sano
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527
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12
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Wu L, Tsunenari N, Nishi H, Sugawa K, Otsuki J, Tatsuma T. Two-Dimensional Arrays of Au Halfshells with Different Sizes for Plasmon-Induced Charge Separation. ChemistrySelect 2017. [DOI: 10.1002/slct.201700797] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ling Wu
- Institute of Industrial Science; University of Tokyo, Komaba, Meguro-ku; Tokyo 153-8505 Japan
| | - Natsumi Tsunenari
- Department of Materials and Applied Chemistry; College of Science and Technology; Nihon University, Chiyoda; Tokyo 101-8308 Japan
| | - Hiroyasu Nishi
- Institute of Industrial Science; University of Tokyo, Komaba, Meguro-ku; Tokyo 153-8505 Japan
| | - Kosuke Sugawa
- Department of Materials and Applied Chemistry; College of Science and Technology; Nihon University, Chiyoda; Tokyo 101-8308 Japan
| | - Joe Otsuki
- Department of Materials and Applied Chemistry; College of Science and Technology; Nihon University, Chiyoda; Tokyo 101-8308 Japan
| | - Tetsu Tatsuma
- Institute of Industrial Science; University of Tokyo, Komaba, Meguro-ku; Tokyo 153-8505 Japan
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Tatsuma T, Nishi H, Ishida T. Plasmon-induced charge separation: chemistry and wide applications. Chem Sci 2017; 8:3325-3337. [PMID: 28507702 PMCID: PMC5416910 DOI: 10.1039/c7sc00031f] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 02/08/2017] [Indexed: 12/24/2022] Open
Abstract
Recent development of nanoplasmonics has stimulated chemists to utilize plasmonic nanomaterials for efficient and distinctive photochemical applications, and physicists to boldly go inside the "wet" chemistry world. The discovery of plasmon-induced charge separation (PICS) has even accelerated these trends. On the other hand, some confusion is found in discussions about PICS. In this perspective, we focus on differences between PICS and some other phenomena such as co-catalysis effect and plasmonic nanoantenna effect. In addition, materials and nanostructures suitable for PICS are shown, and characteristics and features unique to PICS are documented. Although it is well known that PICS has been applied to photovoltaics and photocatalysis, here light is shed on other applications that take better advantage of PICS, such as chemical sensing and biosensing, various photochromisms, photoswitchable functionalities and nanoscale photofabrication.
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Affiliation(s)
- Tetsu Tatsuma
- Institute of Industrial Science , The University of Tokyo , 4-6-1 Komaba, Meguro-ku , Tokyo 153-8505 , Japan .
| | - Hiroyasu Nishi
- Institute of Industrial Science , The University of Tokyo , 4-6-1 Komaba, Meguro-ku , Tokyo 153-8505 , Japan .
| | - Takuya Ishida
- Institute of Industrial Science , The University of Tokyo , 4-6-1 Komaba, Meguro-ku , Tokyo 153-8505 , Japan .
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14
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Baraldi G, Bakhti S, Liu Z, Reynaud S, Lefkir Y, Vocanson F, Destouches N. Polarization-driven self-organization of silver nanoparticles in 1D and 2D subwavelength gratings for plasmonic photocatalysis. NANOTECHNOLOGY 2017; 28:035302. [PMID: 27966465 DOI: 10.1088/1361-6528/28/3/035302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
One of the main challenges in plasmonics is to conceive large-scale, low-cost techniques suitable for the fabrication of metal nanoparticle patterns showing precise spatial organization. Here, we introduce a simple method based on continuous-wave laser illumination to induce the self-organization of silver nanoparticles within high-index thin films. We show that highly regular and homogeneous nanoparticle gratings can be produced on large areas using laser-controlled self-organization processes. This very versatile technique can provide 1D and 2D patterns at a subwavelength scale with tunable features. It does not need any stabilization or expensive devices, such as those required by optical or electron lithography, and is rapid to implement. Accurate in-plane and in-depth characterizations provide valuable information to explain the mechanisms that lead to pattern formation and especially how 2D self-organization can fall into place with successive laser scans. The regular and homogeneous 2D self-organization of metallic NPs with a single laser scan is also reported for the first time in this article. As the reported nanostructures are embedded in porous TiO2, we also theoretically explore the interesting potential of organization on the photocatalytic activity of Ag-NP-containing TiO2 porous films, which is one of the most promising materials for self-cleaning or remediation applications. Realistic electromagnetic simulations demonstrate that the periodic organization of silver nanoparticles can increase the light intensity within the film more than ten times that produced with randomly distributed nanoparticles, leading as expected to enhanced photocatalytic efficiency.
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Tanaka A, Teramura K, Hosokawa S, Kominami H, Tanaka T. Visible light-induced water splitting in an aqueous suspension of a plasmonic Au/TiO 2 photocatalyst with metal co-catalysts. Chem Sci 2017; 8:2574-2580. [PMID: 28553490 PMCID: PMC5431635 DOI: 10.1039/c6sc05135a] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 12/29/2016] [Indexed: 12/27/2022] Open
Abstract
We found that plasmonic Au particles on titanium(iv) oxide (TiO2) act as a visible-light-driven photocatalyst for overall water splitting free from any additives.
We found that plasmonic Au particles on titanium(iv) oxide (TiO2) act as a visible-light-driven photocatalyst for overall water splitting free from any additives. This is the first report showing that surface plasmon resonance (SPR) in a suspension system effectively induces overall water splitting. Modification with various types of metal nanoparticles as co-catalysts enhanced the evolution of H2 and O2. Among these, Ni-modified Au/TiO2 exhibited 5-times higher rates of H2 and O2 evolution than those of Ni-free Au/TiO2. We succeeded in designing a novel solar energy conversion system including three elemental technologies, charge separation with light harvest and an active site for O2 evolution (plasmonic Au particles), charge transfer from Au to the active site for H2 production (TiO2), and an active site for H2 production (Ni cocatalyst), by taking advantage of a technique for fabricating size-controlled Au and Ni nanoparticles. Water splitting occurred in aqueous suspensions of Ni-modified Au/TiO2 even under irradiation of light through an R-62 filter.
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Affiliation(s)
- A Tanaka
- Department of Molecular Engineering , Graduate School of Engineering , Kyoto University , Kyotodaigaku Katsura, Nishikyo-ku , Kyoto 615-8510 , Japan .
| | - K Teramura
- Department of Molecular Engineering , Graduate School of Engineering , Kyoto University , Kyotodaigaku Katsura, Nishikyo-ku , Kyoto 615-8510 , Japan . .,Elements Strategy Initiative for Catalysts & Batteries (ESICB) , Kyoto University , 1-30 Goryo-Ohara, Nishikyo-ku , Kyoto 615-8245 , Japan
| | - S Hosokawa
- Department of Molecular Engineering , Graduate School of Engineering , Kyoto University , Kyotodaigaku Katsura, Nishikyo-ku , Kyoto 615-8510 , Japan . .,Elements Strategy Initiative for Catalysts & Batteries (ESICB) , Kyoto University , 1-30 Goryo-Ohara, Nishikyo-ku , Kyoto 615-8245 , Japan
| | - H Kominami
- Department of Applied Chemistry , Faculty of Science and Engineering , Kindai University , Kowakae, Higashiosaka , Osaka 577-8502 , Japan
| | - T Tanaka
- Department of Molecular Engineering , Graduate School of Engineering , Kyoto University , Kyotodaigaku Katsura, Nishikyo-ku , Kyoto 615-8510 , Japan . .,Elements Strategy Initiative for Catalysts & Batteries (ESICB) , Kyoto University , 1-30 Goryo-Ohara, Nishikyo-ku , Kyoto 615-8245 , Japan
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Abstract
Plasmon-induced charge separation (PICS) at the interface between a plasmonic nanoparticle and semiconductor is now widely used for photovoltaics and photocatalysis. Here we take advantage of PICS for site-selective nanoetching of silver nanocubes on TiO2 beyond the diffraction limit. A silver nanocube exhibits two resonance modes localized at the top and bottom of the nanocube (distal and proximal modes, respectively) when it is placed on TiO2. We achieved selective etching at the top and the bottom of the nanocubes by PICS based on the distal and proximal modes, respectively. The site-selective nanophotonic etching reveals that the anodic reaction involved in PICS is induced by the plasmonic near field, which causes an external photoelectric effect. In particular, the distal mode etching at the top edges is explained in terms of ejection of energetic electrons (or hot electrons) from the distal site to TiO2 across the nanocube.
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Affiliation(s)
- Koichiro Saito
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Ichiro Tanabe
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Tetsu Tatsuma
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
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17
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Heydaripour M, Nourmohammadian F, Saadatjoo N. Sensitivity and Resolution Development of Spiropyran-based Molecular Photoswitches. J CHIN CHEM SOC-TAIP 2016. [DOI: 10.1002/jccs.201600159] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - Farahnaz Nourmohammadian
- Department of Organic Colorants; Institute for Color Science and Technology, 1668836471; Tehran Iran
- Center of Excellence for Color Science and Technology, 1668836471; Tehran Iran
| | - Naghi Saadatjoo
- Department of Chemistry; Semnan University, 19111-35131; Semnan Iran
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18
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Asami K, Nishi H, Tatsuma T. Electrochemical redox-based tuning of near infrared localized plasmons of CuS nanoplates. NANOSCALE 2016; 8:14092-14096. [PMID: 27396728 DOI: 10.1039/c6nr03709g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Fast and reversible control of the plasmonic properties of compound nanoparticles (i.e. CuS nanoplates) was achieved through electrochemical redox reactions. Their electrochemical tunability can be applied to fast-switching near infrared electrochromic devices, whose visible appearance is not changed by switching.
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Affiliation(s)
- Keisuke Asami
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.
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19
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Takahashi Y, Furukawa Y, Ishida T, Yamada S. Site-selective nanoscale-polymerization of pyrrole on gold nanoparticles via plasmon induced charge separation. NANOSCALE 2016; 8:8520-8524. [PMID: 27067380 DOI: 10.1039/c6nr01531j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We proposed a nanoscale oxidative polymerization method which enables site-selective deposition on the surface of gold nanoparticles (AuNPs) combined with TiO2 by using plasmon induced charge separation (PICS) under visible-to-near infrared (IR) light irradiation. The method also revealed that the anodic site of PICS was located at the surface of AuNPs.
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Affiliation(s)
- Y Takahashi
- Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan. and Center for Future Chemistry, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Y Furukawa
- Department of Materials Physics and Chemistry, Graduate School of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - T Ishida
- Department of Materials Physics and Chemistry, Graduate School of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - S Yamada
- Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan. and Center for Future Chemistry, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
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20
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Tatsuma T, Katagi Y, Watanabe S, Akiyoshi K, Kawawaki T, Nishi H, Kazuma E. Direct output of electrical signals from LSPR sensors on the basis of plasmon-induced charge separation. Chem Commun (Camb) 2015; 51:6100-3. [DOI: 10.1039/c5cc01020a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Potentiometric and conductometric sensors based on localized surface plasmon resonance that do not require light to pass through the sample solution were developed and applied to coloured and turbid samples.
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Affiliation(s)
- Tetsu Tatsuma
- Institute of Industrial Science
- University of Tokyo
- Meguro-ku
- Japan
| | - Yu Katagi
- Institute of Industrial Science
- University of Tokyo
- Meguro-ku
- Japan
| | - Satoshi Watanabe
- Institute of Industrial Science
- University of Tokyo
- Meguro-ku
- Japan
| | | | | | - Hiroyasu Nishi
- Institute of Industrial Science
- University of Tokyo
- Meguro-ku
- Japan
| | - Emiko Kazuma
- Institute of Industrial Science
- University of Tokyo
- Meguro-ku
- Japan
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21
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Nishi H, Torimoto T, Tatsuma T. Wavelength- and efficiency-tunable plasmon-induced charge separation by the use of Au–Ag alloy nanoparticles. Phys Chem Chem Phys 2015; 17:4042-6. [DOI: 10.1039/c4cp04673k] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
TiO2 electrodes modified with Au–Ag alloy nanoparticles exhibit photocurrents based on plasmon-induced charge separation (PICS).
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Affiliation(s)
- Hiroyasu Nishi
- Institute of Industrial Science
- The University of Tokyo
- Meguro-ku
- Japan
| | - Tsukasa Torimoto
- Department of Crystalline Materials Science
- Graduate School of Engineering
- Nagoya University
- Chikusa-ku
- Japan
| | - Tetsu Tatsuma
- Institute of Industrial Science
- The University of Tokyo
- Meguro-ku
- Japan
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22
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Katagi Y, Kazuma E, Tatsuma T. Photoelectrochemical synthesis, optical properties and plasmon-induced charge separation behaviour of gold nanodumbbells on TiO₂. NANOSCALE 2014; 6:14543-8. [PMID: 25350687 DOI: 10.1039/c4nr05282j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Chemically synthesized, commercially available Au nanorods were adsorbed on a TiO₂ thin film, and photoelectrochemically transformed to Au nanodumbbells by photoelectrochemical deposition of Au at both ends of the NRs under UV irradiation. The nanodumbbells show about fourfold greater light absorption than the nanorods based on localized surface plasmon resonance (LSPR) in the visible to near infrared region. The absorption intensities and wavelengths of the Au nanodumbbells depend on the size of their spheroidal caps, which can be controlled by UV exposure time. The nanodumbbells can be applied to LSPR sensors, as their absorption peak redshifts with increasing local refractive index near the metal surface. The Au nanodumbbells on TiO₂ are also suitable for photofunctional materials and devices based on plasmon-induced charge separation (PICS) at the Au-TiO₂ interface, because of their higher photoabsorption intensity, better wavelength tunability and greater PICS efficiency than nanorods.
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Affiliation(s)
- Yu Katagi
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.
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23
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Tang B, Zhang M, Yao Y, Sun L, Li J, Xu S, Chen W, Xu W, Wang X. Photoinduced reversible shape conversion of silver nanoparticles assisted by TiO₂. Phys Chem Chem Phys 2014; 16:21999-2007. [PMID: 25205167 DOI: 10.1039/c4cp02874k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Silver nanoprisms were transformed into nanodecahedra through photoinduction of ultraviolet (UV) light in the presence of titanium dioxide (TiO2) quantum dots (QDs). Subsequently, the silver nanodecahedra were reconverted to silver nanoprisms under sodium lamp if there was sufficient citrate in the reaction system. The localized surface plasmon resonance (LSPR) optical properties of silver nanoparticles were tuned during photoinduced shape conversion. The photocatalytic activity of TiO2 QDs assisted the conversion of prisms to decahedra upon UV light irradiation. Nevertheless, the presence of TiO2 did not inhibit the photoinduced reconversion from decahedra to prisms by sodium light. It was demonstrated that citrate was indispensable in the photoinduction process. In addition, oxygen in solution played a vital role in the reversible shape conversion of silver nanoparticles. Moreover, simulated sunlight can convert silver nanoprisms to nanodecahedra instead of UV light with assistance of TiO2 QDs, which would promote the photoinduced reaction of silver nanoparticles based on a natural light source.
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Affiliation(s)
- Bin Tang
- School of Textile Science and Engineering, Wuhan Textile University, Wuhan 430073, China
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24
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Tanabe I, Tatsuma T. Photoinduced Multiple Spectral Changes of Single Plasmonic Gold Nanospheres by the Aid of Coordination. CHEM LETT 2014. [DOI: 10.1246/cl.140153] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ichiro Tanabe
- Institute of Industrial Science, The University of Tokyo
| | - Tetsu Tatsuma
- Institute of Industrial Science, The University of Tokyo
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25
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Kazuma E, Tatsuma T. Localized surface plasmon resonance sensors based on wavelength-tunable spectral dips. NANOSCALE 2014; 6:2397-405. [PMID: 24435010 DOI: 10.1039/c3nr05846h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Localized surface plasmon resonance (LSPR) sensors serve as sensitive analytical tools based on refractive index changes, which can be applied to affinity-based chemical sensing and biosensing. However, to select the monitoring wavelength, monodisperse Au or Ag nanoparticles must be synthesized. Here we developed LSPR sensors that operate at arbitrary wavelengths after preirradiation at the corresponding wavelength. Polydisperse plasmonic Ag nanospheroids or nanorods are photocatalytically deposited on TiO2. The nanoparticle ensemble shows a broad absorption band over the visible and near infrared regions, and absorption dips can be formed at desired wavelengths simply by photoexciting the ensemble at the wavelengths, on the basis of plasmon-induced charge separation. The dips redshift linearly in response to a positive change of refractive index, and the refractive index sensitivity linearly increases with increasing dip wavelength (e.g., 356 nm RIU(-1) at 1832 nm). The dip-based sensor is applied to monitoring of selective binding between biotin and streptavidin. The present system would allow development of miniaturized and cost-effective sensors that operate at the optimum wavelength at which the sensitivity is highest within the optical window of the sample.
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Affiliation(s)
- Emiko Kazuma
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.
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26
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Visible-Light-Induced Hydrogen and Oxygen Formation over Pt/Au/WO3 Photocatalyst Utilizing Two Types of Photoabsorption Due to Surface Plasmon Resonance and Band-Gap Excitation. J Am Chem Soc 2014; 136:586-9. [DOI: 10.1021/ja410230u] [Citation(s) in RCA: 242] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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27
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Kawawaki T, Tatsuma T. Enhancement of PbS quantum dot-sensitized photocurrents using plasmonic gold nanoparticles. Phys Chem Chem Phys 2013; 15:20247-51. [DOI: 10.1039/c3cp53625d] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Kogo A, Takahashi Y, Sakai N, Tatsuma T. Gold cluster-nanoparticle diad systems for plasmonic enhancement of photosensitization. NANOSCALE 2013; 5:7855-7860. [PMID: 23846615 DOI: 10.1039/c3nr02420b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Quantum-sized gold clusters are deposited on TiO2 both as a photosensitizer and catalyst, and coupled to plasmonic gold nanoparticles as a light harvesting antenna. Photocurrent enhancement was observed for Au25(SG)18 and Au38(SG)24 but not for Au102(SG)44 (SG = glutathione). The maximum enhancement factor of ~9 is reached at 900 nm.
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Affiliation(s)
- Atsushi Kogo
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Tokyo 153-8505, Japan
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29
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Tanabe I, Yasuda H, Tatsuma T. Preparation of Thin Poly(vinyl chloride) Films with Size-controlled Nanopores. CHEM LETT 2013. [DOI: 10.1246/cl.130371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ichiro Tanabe
- Institute of Industrial Science, The University of Tokyo
| | - Hajime Yasuda
- Institute of Industrial Science, The University of Tokyo
| | - Tetsu Tatsuma
- Institute of Industrial Science, The University of Tokyo
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30
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Konishi Y, Tanabe I, Tatsuma T. Plasmon-induced oxidation of gold nanoparticles on TiO2 in the presence of ligands. Dalton Trans 2013; 42:15937-40. [DOI: 10.1039/c3dt51495a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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