1
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Wu Y, Han S, Li Y, Shen W. Fabrication of monodisperse gold-copper nanocubes and AuCu-cuprous sulfide heterodimers by a step-wise polyol reduction. J Colloid Interface Sci 2022; 626:136-145. [DOI: 10.1016/j.jcis.2022.06.120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 06/22/2022] [Accepted: 06/23/2022] [Indexed: 10/31/2022]
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2
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L10 phase formation in FePd thin films induced by H2 during annealing. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-021-01809-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Osugi S, Takano S, Masuda S, Harano K, Tsukuda T. Few-nm-sized, phase-pure Au 5Sn intermetallic nanoparticles: synthesis and characterization. Dalton Trans 2021; 50:5177-5183. [PMID: 33881079 DOI: 10.1039/d1dt00132a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Nanoparticles of intermetallic compounds have attracted much interest because they can exhibit novel electronic and catalytic properties due to their specific crystal structure, ordered atomic arrangement, and quantum effect. Here, gold-tin (AuSn) bimetallic nanoparticles with various mixing ratios were prepared by a co-reduction method using various protective agents (e.g., polymer, amine, phosphine, carboxylic acid, and thiol). Powder X-ray diffractometry and transmission electron microscopy revealed that few-nm-sized, phase-pure Au5Sn intermetallic nanoparticles (IMNPs) were successfully synthesized when Au3+ and Sn2+ precursors with a ratio of 6 : 4 were co-reduced in the presence of oleylamine. The Au5Sn IMNPs thus prepared did not exhibit localized surface plasmon resonance, in contrast to pure Au nanoparticles of comparable sizes. This suggests that interband transition dominates the optical response due to an increase in the density of states near the Fermi level by introducing Sn. The Au5Sn IMNPs supported on mesoporous silica (SBA-15) catalyzed the aerobic oxidation reaction of indanol.
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Affiliation(s)
- Satoshi Osugi
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0031, Japan.
| | - Shinjiro Takano
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0031, Japan.
| | - Shinya Masuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0031, Japan.
| | - Koji Harano
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0031, Japan.
| | - Tatsuya Tsukuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0031, Japan. and Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
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4
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Hasegawa S, Tsukuda T. Exploring Novel Catalysis Using Polymer-Stabilized Metal Clusters. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200377] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Shingo Hasegawa
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tatsuya Tsukuda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
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5
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Alshammari RH, Rajesh UC, Morgan DG, Zaleski JM. Au-Cu@PANI Alloy Core Shells for Aerobic Fibrin Degradation under Visible Light Exposure. ACS APPLIED BIO MATERIALS 2020; 3:7631-7638. [PMID: 35019503 DOI: 10.1021/acsabm.0c00833] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Fibrin plays a critical role in wound healing and hemostasis, yet it is also the main case of cardiovascular diseases and thrombosis. Here, we show the unique design of Au-Cu@PANI alloy core-shell rods for fibrin clot degradation. Microscopic (transmission electron microscopy (TEM), scanning transmission electron microscopy-energy-dispersive X-ray (STEM-EDX)) and structural characterizations (powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS)) of the Au-Cu@PANI hybrid material reveal the formation of Au-Cu heterogeneous alloy core rods (aspect ratio = 3.7) with thin Cu2O and PANI shells that create a positive surface charge (ζ-potential = +22 mV). This architecture is supported by the survey XPS spectrum showing the presence of Cu 2p, N 1s, and C 1s features with binding energies of 934.8, 399.7, and 284.8 eV, respectively. Upon photolysis (λ ≥ 495 or 590 nm), these hybrid composite nanorods provide sufficient excited-state redox potential to generate reactive oxygen species (ROS) for degradation of model fibrin clots within 5-7 h. Detailed scanning electron microscopy (SEM) analysis of the fibrin network shows significant morphology modification including formation of large voids and strand termini, indicating degradation of fibrin protofibril by Au-Cu@PANI. The dye 1,3-diphenylisobenzofuran (DPBF) used to detect the presence of 1O2 shows a 27% bleaching of the absorption at λ = 418 nm within 75 min of irradiation of an aqueous Au-Cu@PANI solution in air. Moreover, electron paramagnetic resonance (EPR) spin-trapping experiments reveal a hyperfine-coupled triplet signature at room temperature with intensities 1:1:1: and g-value = 2.0057, characteristic of the reaction between the spin probe 4-Oxo-TEMP and 1O2 during irradiation. Controlled 1O2 scavenging experiments by NaN3 show 82% reduction in the spin-trapped EPR signal area. Both DPBF bleaching and EPR spin trapping indicate that in situ generated 1O2 is responsible for fibrin strand scission. This unique nanomaterial function via use of ubiquitous oxygen as a reagent could open creative avenues for future in vivo biomedical applications to treat fibrin clot diseases.
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Affiliation(s)
- Riyadh H Alshammari
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States.,Department of Chemistry, King Saud University, Riyadh 11451, Saudi Arabia
| | - U Chinna Rajesh
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - David Gene Morgan
- Electron Microscopy Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Jeffrey M Zaleski
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
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6
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Machado T, Macedo NG, Assis M, Doñate-Buendia C, Mínguez-Vega G, Teixeira MM, Foggi CC, Vergani CE, Beltrán-Mir H, Andrés J, Cordoncillo E, Longo E. From Complex Inorganic Oxides to Ag-Bi Nanoalloy: Synthesis by Femtosecond Laser Irradiation. ACS OMEGA 2018; 3:9880-9887. [PMID: 31459116 PMCID: PMC6644639 DOI: 10.1021/acsomega.8b01264] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 08/13/2018] [Indexed: 05/17/2023]
Abstract
Bimetallic nanoalloys with a wide variety of structures and compositions have been fabricated through many diverse techniques. Generally, various steps and chemicals are involved in their fabrication. In this study, the synthesis of Ag-Bi nanoalloys by femtosecond laser irradiation of an inorganic oxide Ag2WO4/NaBiO3 target without any chemicals like reducing agents or solvent is presented. The interaction between these materials and the ultrashort pulse of light allows the migration of Ag and Bi atoms from the crystal lattice to the particles surfaces and then to the plasma plume, where the reduction of the positively charged Ag and Bi species in their respective metallic species takes place. Subsequently, the controlled nucleation and growth of the Ag-Bi alloyed nanoparticles occurs in situ during the irradiation process in air. Although at the bulk level, these elements are highly immiscible, it was experimentally demonstrated that at nanoscale, the Ag-Bi nanoalloy can assume a randomly mixed structure with up to 6 ± 1 atom % of Bi solubilized into the face-centered cubic structure of Ag. Furthermore, the Ag-Bi binary system possesses high antibacterial activity against Staphylococcus aureus (methicillin-resistant and methicilin-susceptible), which is interesting for potential antimicrobial applications, consequently increasing their range of applicability. The present results provide potential insights into the structures formed by the Ag-Bi systems at the nanoscale and reveal a new processing method where complex inorganic oxides can be used as precursors for the controlled synthesis of alloyed bimetallic nanoparticles.
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Affiliation(s)
- Thales
R. Machado
- Departamento
de Química, CDMF, Universidade Federal
de São Carlos (UFSCar), São Carlos 13565-905, São Paulo, Brazil
| | - Nadia G. Macedo
- Departamento
de Química, CDMF, Universidade Federal
de São Carlos (UFSCar), São Carlos 13565-905, São Paulo, Brazil
| | - Marcelo Assis
- Departamento
de Química, CDMF, Universidade Federal
de São Carlos (UFSCar), São Carlos 13565-905, São Paulo, Brazil
| | - Carlos Doñate-Buendia
- Institut de Noves Tecnologies de la Imatge (INIT),
GROC, Departament
de Química
Inorgànica i Orgànica, and Departament de Química Física
i Analítica, Universitat Jaume I
(UJI), Castellón de la Plana 12071, Castelló, Spain
| | - Gladys Mínguez-Vega
- Institut de Noves Tecnologies de la Imatge (INIT),
GROC, Departament
de Química
Inorgànica i Orgànica, and Departament de Química Física
i Analítica, Universitat Jaume I
(UJI), Castellón de la Plana 12071, Castelló, Spain
| | - Mayara M. Teixeira
- Departamento
de Química, CDMF, Universidade Federal
de São Carlos (UFSCar), São Carlos 13565-905, São Paulo, Brazil
| | - Camila C. Foggi
- Departamento
de Química, CDMF, Universidade Federal
de São Carlos (UFSCar), São Carlos 13565-905, São Paulo, Brazil
| | - Carlos E. Vergani
- Faculdade
de Odontologia, Universidade Estadual Paulista
(UNESP), Araraquara 14801-385, São Paulo, Brazil
| | - Héctor Beltrán-Mir
- Institut de Noves Tecnologies de la Imatge (INIT),
GROC, Departament
de Química
Inorgànica i Orgànica, and Departament de Química Física
i Analítica, Universitat Jaume I
(UJI), Castellón de la Plana 12071, Castelló, Spain
| | - Juan Andrés
- Institut de Noves Tecnologies de la Imatge (INIT),
GROC, Departament
de Química
Inorgànica i Orgànica, and Departament de Química Física
i Analítica, Universitat Jaume I
(UJI), Castellón de la Plana 12071, Castelló, Spain
| | - Eloisa Cordoncillo
- Institut de Noves Tecnologies de la Imatge (INIT),
GROC, Departament
de Química
Inorgànica i Orgànica, and Departament de Química Física
i Analítica, Universitat Jaume I
(UJI), Castellón de la Plana 12071, Castelló, Spain
| | - Elson Longo
- Departamento
de Química, CDMF, Universidade Federal
de São Carlos (UFSCar), São Carlos 13565-905, São Paulo, Brazil
- E-mail:
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7
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Yamauchi M, Ozawa N, Kubo M. Experimental and Quantum Chemical Approaches to Develop Highly Selective Nanocatalysts for CO2-free Power Circulation. CHEM REC 2016; 16:2249-2259. [DOI: 10.1002/tcr.201600047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Indexed: 01/01/2023]
Affiliation(s)
- Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I CNER), Kyushu University; Motooka 744 Nishi-ku Fukuoka 819-0395 Japan
| | - Nobuki Ozawa
- Institute for Materials Research, Tohoku University; 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan
| | - Momoji Kubo
- Institute for Materials Research, Tohoku University; 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan
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8
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Liu S, Li Y, Shen W. Tuning the catalytic behavior of metal nanoparticles: The issue of the crystal phase. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(15)60932-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Suzuki S, Tomita Y, Kuwabata S, Torimoto T. Synthesis of alloy AuCu nanoparticles with the L10 structure in an ionic liquid using sputter deposition. Dalton Trans 2015; 44:4186-94. [DOI: 10.1039/c4dt03557g] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Synthesis of alloy AuCu nanoparticles with the L10 structure in an ionic liquid using sputter deposition.
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Affiliation(s)
- Shushi Suzuki
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Yousuke Tomita
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Susumu Kuwabata
- Graduate School of Engineering
- Osaka University
- Suita
- Japan
- Japan Science and Technology Agency
| | - Tsukasa Torimoto
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
- Japan Science and Technology Agency
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10
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Kurashige W, Yamazoe S, Yamaguchi M, Nishido K, Nobusada K, Tsukuda T, Negishi Y. Au25 Clusters Containing Unoxidized Tellurolates in the Ligand Shell. J Phys Chem Lett 2014. [PMID: 26270495 DOI: 10.1021/jp5085372] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
We report herein the synthesis and characterization of Au25 clusters containing tellurolates (TePh) in the ligand shell ([Au25(TePh)n(SC8H17)18-n](-); n = 1-18). [Au25(TePh)n(SC8H17)18-n](-) clusters were synthesized by reacting [Au25(SC8H17)18](-) with diphenyl ditelluride ((PhTe)2) in solution. Characterization of the products by mass spectrometry and X-ray absorption fine structure analysis revealed that the tellurolates in [Au25(TePh)n(SC8H17)18-n](-), unlike those in tellurolate-protected gold nanoparticles, were not oxidized. Various experiments on the products and theoretical calculations on related clusters revealed that protection by the tellurolates distorts (expands) the central Au13 core and decreases the HOMO-LUMO gap of the Au25 clusters.
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Affiliation(s)
- Wataru Kurashige
- †Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Seiji Yamazoe
- ‡Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- §Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Masaki Yamaguchi
- †Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Keisuke Nishido
- †Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Katsuyuki Nobusada
- §Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Tatsuya Tsukuda
- ‡Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- §Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Yuichi Negishi
- †Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
- #Photocatalysis International Research Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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