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Hattori, Yocefu
Publications (7 of 7) Show all publications
Pavliuk, M. V., Alvarez, S. G., Hattori, Y., Messing, M. E., Czapla-Masztafiak, J., Szlachetko, J., . . . Sá, J. (2019). Hydrated Electron Generation by Excitation of Copper Localized Surface Plasmon Resonance. Journal of Physical Chemistry Letters, 10(8), 1743-1749
Open this publication in new window or tab >>Hydrated Electron Generation by Excitation of Copper Localized Surface Plasmon Resonance
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2019 (English)In: Journal of Physical Chemistry Letters, ISSN 1948-7185, E-ISSN 1948-7185, Vol. 10, no 8, p. 1743-1749Article in journal (Refereed) Published
Abstract [en]

Hydrated electrons are important in radiation chemistry and charge transfer reactions, with applications that include chemical damage of DNA, catalysis, and signaling. Conventionally, hydrated electrons are produced by pulsed radiolysis, sonolysis, two-ultraviolet-photon laser excitation of liquid water, or photodetachment of suitable electron donors. Here we report a method for the generation of hydrated electrons via single-visible-photon excitation of localized surface plasmon resonances (LSPRs) of supported sub-3 nm copper nanoparticles in contact with water. Only excitations at the LSPR maximum resulted in the formation of hydrated electrons, suggesting that plasmon excitation plays a crucial role in promoting electron transfer from the nanoparticle into the solution. The reactivity of the hydrated electrons was confirmed via proton reduction and concomitant H-2 evolution in the presence of a Ru/TiO2 catalyst.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2019
National Category
Physical Chemistry Condensed Matter Physics
Identifiers
urn:nbn:se:uu:diva-383191 (URN)10.1021/acs.jpclett.9b00792 (DOI)000465507700014 ()30920838 (PubMedID)
Funder
Swedish Research CouncilStiftelsen Olle Engkvist Byggmästare
Note

De två första författarna delar förstaförfattarskapet.

Available from: 2019-07-24 Created: 2019-07-24 Last updated: 2019-07-24Bibliographically approved
Hattori, Y., Abdellah, M., Meng, J., Zheng, K. & Sá, J. (2019). Simultaneous Hot Electron and Hole Injection upon Excitation of Gold Surface Plasmon. Journal of Physical Chemistry Letters, 10(11), 3140-3146
Open this publication in new window or tab >>Simultaneous Hot Electron and Hole Injection upon Excitation of Gold Surface Plasmon
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2019 (English)In: Journal of Physical Chemistry Letters, ISSN 1948-7185, E-ISSN 1948-7185, Vol. 10, no 11, p. 3140-3146Article in journal (Refereed) Published
Abstract [en]

We have successfully investigated the simultaneous injection of hot electrons and holes upon excitation of gold localized surface plasmon resonance (LSPR). The studies were performed on all-solid-state plasmonic system composed of titanium dioxide (TiO2)/poly(3,4-ethylenedioxythiophene) :poly(styrenesulfonic acid) (PEDOT:PSS) p-n junctions with gold nanoparticles (Au NPs). The study revealed that both charge carriers are transferred within 200 fs to the respective charge acceptors, exhibiting a free carrier transport behavior. We also confirmed that the transfer of charge carriers are accompanied by change in the initial relaxation dynamics of Au NPs.

National Category
Physical Chemistry
Identifiers
urn:nbn:se:uu:diva-389600 (URN)10.1021/acs.jpclett.9b01085 (DOI)000471079400075 ()31117685 (PubMedID)
Funder
Swedish Research Council
Available from: 2019-07-24 Created: 2019-07-24 Last updated: 2019-07-24Bibliographically approved
Hattori, Y., Abdellah, M., Rocha, I., Pavliuk, M. V., Fernandes, D. L. A. & Sá, J. (2018). Light-induced ultrafast proton-coupled electron transfer responsible for H-2 evolution on silver plasmonics. Materials Today, 21(6), 590-593
Open this publication in new window or tab >>Light-induced ultrafast proton-coupled electron transfer responsible for H-2 evolution on silver plasmonics
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2018 (English)In: Materials Today, ISSN 1369-7021, E-ISSN 1873-4103, Vol. 21, no 6, p. 590-593Article in journal (Refereed) Published
Abstract [en]

Light-driven proton-coupled electron transfer (PCET) reactions on nanoplasmonics would bring temporal control of their reactive pathways, in particular, prolong their charge separation state. Using a silver nano-hybrid plasmonic structure, we observed that optical excitation of Ag-localized surface plasmon instigated electron injection into TiO2 conduction band and oxidation of isopropanol alcoholic functionality. Femtosecond transient infrared absorption studies show that electron transfer from Ag to TiO2 occurs in ca. 650 fs, while IPA molecules near the Ag surface undergo an ultrafast bidirectional PCET step within 400 fs. Our work demonstrates that ultrafast PCET reaction plays a determinant role in prolonging charge separation state, providing an innovative strategy for visible-light photocatalysis with plasmonic nanostructures.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD, 2018
National Category
Physical Chemistry Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-362849 (URN)10.1016/j.mattod.2018.05.002 (DOI)000441765700016 ()
Funder
Swedish Research Council, 2015-03764Stiftelsen Olle Engkvist Byggmästare, 2016/367
Available from: 2018-10-15 Created: 2018-10-15 Last updated: 2018-10-18Bibliographically approved
Rocha, I., Hattori, Y., Mirna, D., Mihranyan, A., Strömme, M. & Lindh, J. (2018). Spectroscopic and physicochemical characterization of sulfonated Cladophora cellulose beads. Langmuir, 34(37), 11121-11125
Open this publication in new window or tab >>Spectroscopic and physicochemical characterization of sulfonated Cladophora cellulose beads
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2018 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 34, no 37, p. 11121-11125Article in journal (Refereed) Published
Abstract [en]

The work presents a full physicochemical characterization of sulfonated cellulose beads prepared from Cladophora nanocellulose intended for use in biological systems. 2,3-Dialdehyde cellulose (DAC) beads were sulfonated, and transformation of up to 50% of the aldehyde groups was achieved, resulting in highly charged and porous materials compared to the compact surface of the DAC beads. The porosity could be tailored by adjusting the degree of sulfonation, and a subsequent reduction of the aldehyde groups to hydroxyl groups maintained the bead structure without considerable alteration of the surface properties. The thermal stability of the DAC beads was significantly increased with the sulfonation and reduction reactions. Raman spectroscopy also showed to be a useful technique for the characterization of sulfonated cellulose materials.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018
National Category
Physical Chemistry Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-346211 (URN)10.1021/acs.langmuir.8b01704 (DOI)000445440200035 ()30169040 (PubMedID)
Available from: 2018-03-15 Created: 2018-03-15 Last updated: 2018-10-19Bibliographically approved
Pavliuk, M. V., Fernandes, A. B., Abdellah, M., Fernandes, D. L. A., Machado, C. ., Rocha, I., . . . Sá, J. (2017). Nano-hybrid plasmonic photocatalyst for hydrogen production at 20% efficiency. Scientific Reports, 7, Article ID 8670.
Open this publication in new window or tab >>Nano-hybrid plasmonic photocatalyst for hydrogen production at 20% efficiency
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2017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, article id 8670Article in journal (Refereed) Published
Abstract [en]

The efficient conversion of light energy into chemical energy is key for sustainable human development. Several photocatalytic systems based on photovoltaic electrolysis have been used to produce hydrogen via water reduction. However, in such devices, light harvesting and proton reduction are carried separately, showing quantum efficiency of about 10–12%. Here, we report a nano-hybrid photocatalytic assembly that enables concomitant reductive hydrogen production and pollutant oxidation with solar-to-fuel efficiencies up to 20%. The modular architecture of this plasmonic material allows the fine-tuning of its photocatalytic properties by simple manipulation of a reduced number of basic components.

National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials; Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-328630 (URN)10.1038/s41598-017-09261-7 (DOI)000407864400051 ()
Funder
The Swedish Foundation for International Cooperation in Research and Higher Education (STINT), IB2015-6474
Available from: 2017-08-28 Created: 2017-08-28 Last updated: 2018-12-17Bibliographically approved
Garlisi, C., Szlachetko, J., Aubry, C., Fernandes, D. L. A., Hattori, Y., Paun, C., . . . Palmisano, G. (2017). N-TiO2/Cu-TiO2 double-layer films: Impact of stacking order on photocatalytic properties. Journal of Catalysis, 353, 116-122
Open this publication in new window or tab >>N-TiO2/Cu-TiO2 double-layer films: Impact of stacking order on photocatalytic properties
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2017 (English)In: Journal of Catalysis, ISSN 0021-9517, E-ISSN 1090-2694, Vol. 353, p. 116-122Article in journal (Refereed) Published
Abstract [en]

In this work, we report for the first time a unique configuration of N-doped and Cu-doped TiO2 bilayer. The activity of TiO2 was improved by combining Cu- and N-doping in a layered thin-film structure. The impact of the stacking order was studied, pointing out how the best arrangement is by far the one with Cu-TiO2 as the top layer. The results reveal a unique and simple way to enhance the photocatalytic response of TiO2 in the visible domain.

Place, publisher, year, edition, pages
ACADEMIC PRESS INC ELSEVIER SCIENCE, 2017
Keywords
N-TiO2/Cu-TiO2 films, Stacking order, Photocatalytic oxidation
National Category
Chemical Sciences
Identifiers
urn:nbn:se:uu:diva-335413 (URN)10.1016/j.jcat.2017.06.028 (DOI)000410468300014 ()
Available from: 2017-12-06 Created: 2017-12-06 Last updated: 2017-12-06Bibliographically approved
Pavliuk, M. V., Gutiérrez Álvarez, S., Hattori, Y., Messing, M. E., Czapla-Masztafiak, J., Szlachetko, J., . . . Sá, J. Hydrated Electron Generation by Excitation of Localized Surface Plasmons in Copper Nanoparticles. Science Advances
Open this publication in new window or tab >>Hydrated Electron Generation by Excitation of Localized Surface Plasmons in Copper Nanoparticles
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(English)In: Science Advances, E-ISSN 2375-2548Article in journal (Refereed) Submitted
National Category
Physical Chemistry
Identifiers
urn:nbn:se:uu:diva-369929 (URN)
Available from: 2018-12-17 Created: 2018-12-17 Last updated: 2019-03-20
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