The Experts below are selected from a list of 6471 Experts worldwide ranked by ideXlab platform
Zhanxi Fan - One of the best experts on this subject based on the ideXlab platform.
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Heterophase fcc-2H-fcc gold nanorods.
Nature communications, 2020Co-Authors: Zhanxi Fan, Michel Bosman, Zhiqi Huang, Ye Chen, Chongyi Ling, Yuriy Akimov, Robert Laskowski, Bo Chen, Peter ErciusAbstract:The crystal phase-based heterostructures of noble metal nanomaterials are of great research interest for various applications, such as plasmonics and catalysis. However, the Synthesis of unusual crystal phases of noble metals still remains a great challenge, making the construction of heterophase noble metal nanostructures difficult. Here, we report a one-pot Wet-Chemical Synthesis of well-defined heterophase fcc-2H-fcc gold nanorods (fcc: face-centred cubic; 2H: hexagonal close-packed with stacking sequence of "AB") at mild conditions. Single particle-level experiments and theoretical investigations reveal that the heterophase gold nanorods demonstrate a distinct optical property compared to that of the conventional fcc gold nanorods. Moreover, the heterophase gold nanorods possess superior electrocatalytic activity for the carbon dioxide reduction reaction over their fcc counterparts under ambient conditions. First-principles calculations suggest that the boosted catalytic performance stems from the energetically favourable adsorption of reaction intermediates, endowed by the unique heterophase characteristic of gold nanorods.
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Heterophase fcc-2H-fcc gold nanorods
'Springer Science and Business Media LLC', 2020Co-Authors: Zhanxi Fan, Michel Bosman, Zhiqi Huang, Ye Chen, Chongyi Ling, Robert Laskowski, Bo Chen, Yuriy A. Akimov, Peter ErciusAbstract:The crystal phase-based heterostructures of noble metal nanomaterials are of interest for various applications. Here, the authors report the Wet-Chemical Synthesis of gold nanorods with a well-defined fcc-2H-fcc heterophase, which possess unique optical and catalytic properties
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solution phase epitaxial growth of noble metal nanostructures on dispersible single layer molybdenum disulfide nanosheets
Nature Communications, 2013Co-Authors: Xiao Huang, Zhanxi Fan, Zhiyuan Zeng, Shuyu Bao, Mengfei Wang, Hua ZhangAbstract:Compared with the conventional deposition techniques used for the epitaxial growth of metallic structures on a bulk substrate, Wet-Chemical Synthesis based on the dispersible template offers several advantages, including relatively low cost, high throughput, and the capability to prepare metal nanostructures with controllable size and morphology. Here we demonstrate that the solution-processable two-dimensional MoS(2) nanosheet can be used to direct the epitaxial growth of Pd, Pt and Ag nanostructures at ambient conditions. These nanostructures show the major (111) and (101) orientations on the MoS(2)(001) surface. Importantly, the Pt-MoS(2) hybrid nanomaterials exhibit much higher electrocatalytic activity towards the hydrogen evolution reaction compared with the commercial Pt catalysts with the same Pt loading. We believe that nanosheet-templated epitaxial growth of nanostructures via Wet-Chemical reaction is a promising strategy towards the facile and high-yield production of novel functional materials.
Peter Ercius - One of the best experts on this subject based on the ideXlab platform.
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Heterophase fcc-2H-fcc gold nanorods.
Nature communications, 2020Co-Authors: Zhanxi Fan, Michel Bosman, Zhiqi Huang, Ye Chen, Chongyi Ling, Yuriy Akimov, Robert Laskowski, Bo Chen, Peter ErciusAbstract:The crystal phase-based heterostructures of noble metal nanomaterials are of great research interest for various applications, such as plasmonics and catalysis. However, the Synthesis of unusual crystal phases of noble metals still remains a great challenge, making the construction of heterophase noble metal nanostructures difficult. Here, we report a one-pot Wet-Chemical Synthesis of well-defined heterophase fcc-2H-fcc gold nanorods (fcc: face-centred cubic; 2H: hexagonal close-packed with stacking sequence of "AB") at mild conditions. Single particle-level experiments and theoretical investigations reveal that the heterophase gold nanorods demonstrate a distinct optical property compared to that of the conventional fcc gold nanorods. Moreover, the heterophase gold nanorods possess superior electrocatalytic activity for the carbon dioxide reduction reaction over their fcc counterparts under ambient conditions. First-principles calculations suggest that the boosted catalytic performance stems from the energetically favourable adsorption of reaction intermediates, endowed by the unique heterophase characteristic of gold nanorods.
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Heterophase fcc-2H-fcc gold nanorods
'Springer Science and Business Media LLC', 2020Co-Authors: Zhanxi Fan, Michel Bosman, Zhiqi Huang, Ye Chen, Chongyi Ling, Robert Laskowski, Bo Chen, Yuriy A. Akimov, Peter ErciusAbstract:The crystal phase-based heterostructures of noble metal nanomaterials are of interest for various applications. Here, the authors report the Wet-Chemical Synthesis of gold nanorods with a well-defined fcc-2H-fcc heterophase, which possess unique optical and catalytic properties
Catherine J Murphy - One of the best experts on this subject based on the ideXlab platform.
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seedless surfactantless Wet Chemical Synthesis of silver nanowires
Nano Letters, 2003Co-Authors: K K Caswell, Christopher M Bender, Catherine J MurphyAbstract:We report a method to make crystalline silver nanowires in water, in the absence of a surfactant or polymer to direct nanoparticle growth, and without externally added seed crystallites. The reaction is one in which silver salt is reduced to silver metal, at 100 °C, by sodium citrate, in the presence of NaOH. Hydroxide ion concentration is key to producing nanowires, which are up to 12 microns long, instead of nanospheres.
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evidence for seed mediated nucleation in the Chemical reduction of gold salts to gold nanoparticles
Chemistry of Materials, 2001Co-Authors: Nikhil R Jana, Latha A Gearheart, Catherine J MurphyAbstract:Central to the concept of seed-mediated growth of nanoparticles is that small nanoparticle seeds serve as nucleation centers to grow nanoparticles to a desired size. We have examined this common assumption in a model system, the Wet Chemical Synthesis of gold nanoparticles via reduction of a gold salt, by transmission electron microscopy and electronic absorption spectroscopy. We find that changing the seed concentration does affect the size of the product nanoparticles, but the method of reagent addition drastically affects the outcome even more. For fast addition of reducing agent, the presence of seeds appears to promote the formation of more seeds instead of growth. The observed nucleations are drastically enhanced (99%) compared to particle growth. For slow addition of reducing agent, the seeds do grow, but the product nanoparticle's degree of homogeneity in shape is compromised. For higher concentrations of seeds, nanoparticle growth is better controlled for slow addition of reducing agent compared ...
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Wet Chemical Synthesis of high aspect ratio cylindrical gold nanorods
Journal of Physical Chemistry B, 2001Co-Authors: Nikhil R Jana, Latha A Gearheart, Catherine J MurphyAbstract:Gold nanorods with aspect ratios of 4.6 ± 1.2, 13 ± 2, and 18 ± 2.5 (all with 16 ± 3 nm short axis) are prepared by a seeding growth approach in the presence of an aqueous miceller template. Citrate-capped 3.5 nm diameter gold particles, prepared by the reduction of HAuCl4 with borohydride, are used as the seed. The aspect ratio of the nanorods is controlled by varying the ratio of seed to metal salt. The long rods are isolated from spherical particles by centrifugation.
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Wet Chemical Synthesis of silver nanorods and nanowiresof controllable aspect ratio
Chemical Communications, 2001Co-Authors: Nikhil R Jana, Latha A Gearheart, Catherine J MurphyAbstract:Using a seed-mediated growth approach in a rodlike micellar media, silver nanorods of varied aspect ratio were prepared from nearly spherical 4 nm silver nanoparticles.
Zhiqi Huang - One of the best experts on this subject based on the ideXlab platform.
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Heterophase fcc-2H-fcc gold nanorods.
Nature communications, 2020Co-Authors: Zhanxi Fan, Michel Bosman, Zhiqi Huang, Ye Chen, Chongyi Ling, Yuriy Akimov, Robert Laskowski, Bo Chen, Peter ErciusAbstract:The crystal phase-based heterostructures of noble metal nanomaterials are of great research interest for various applications, such as plasmonics and catalysis. However, the Synthesis of unusual crystal phases of noble metals still remains a great challenge, making the construction of heterophase noble metal nanostructures difficult. Here, we report a one-pot Wet-Chemical Synthesis of well-defined heterophase fcc-2H-fcc gold nanorods (fcc: face-centred cubic; 2H: hexagonal close-packed with stacking sequence of "AB") at mild conditions. Single particle-level experiments and theoretical investigations reveal that the heterophase gold nanorods demonstrate a distinct optical property compared to that of the conventional fcc gold nanorods. Moreover, the heterophase gold nanorods possess superior electrocatalytic activity for the carbon dioxide reduction reaction over their fcc counterparts under ambient conditions. First-principles calculations suggest that the boosted catalytic performance stems from the energetically favourable adsorption of reaction intermediates, endowed by the unique heterophase characteristic of gold nanorods.
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Heterophase fcc-2H-fcc gold nanorods
'Springer Science and Business Media LLC', 2020Co-Authors: Zhanxi Fan, Michel Bosman, Zhiqi Huang, Ye Chen, Chongyi Ling, Robert Laskowski, Bo Chen, Yuriy A. Akimov, Peter ErciusAbstract:The crystal phase-based heterostructures of noble metal nanomaterials are of interest for various applications. Here, the authors report the Wet-Chemical Synthesis of gold nanorods with a well-defined fcc-2H-fcc heterophase, which possess unique optical and catalytic properties
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Synthesis of platinum nanotubes and nanorings via simultaneous metal alloying and etching
Journal of the American Chemical Society, 2016Co-Authors: Zhiqi Huang, David Raciti, Lei Zhang, Lin Deng, Yijing Liu, Niveeen M Khashab, Chao Wang, Jinlong Gong, Zhihong NieAbstract:Metallic nanotubes represent a class of hollow nanostructures with unique catalytic properties. However, the Wet-Chemical Synthesis of metallic nanotubes remains a substantial challenge, especially for those with dimensions below 50 nm. This communication describes a simultaneous alloying-etching strategy for the Synthesis of Pt nanotubes with open ends by selective etching Au core from coaxial Au/Pt nanorods. This approach can be extended for the preparation of Pt nanorings when Saturn-like Au core/Pt shell nanoparticles are used. The diameter and wall thickness of both nanotubes and nanorings can be readily controlled in the range of 14–37 nm and 2–32 nm, respectively. We further demonstrated that the nanotubes with ultrathin side walls showed superior catalytic performance in oxygen reduction reaction.
Kaupo Kukli - One of the best experts on this subject based on the ideXlab platform.
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behavior of nanocomposite consisting of manganese ferrite particles and atomic layer deposited bismuth oxide chloride film
Journal of Magnetism and Magnetic Materials, 2020Co-Authors: Kaupo Kukli, Mats Mikkor, Andris Sutka, Mikk Kull, Helina Seemen, Joosep Link, Raivo Stern, Aile TammAbstract:Abstract Nanocomposites of manganese ferrite and bismuth oxide chloride were synthesized. The composites consisted of 10 nm thick nanocrystalline bismuth oxide chloride thin film grown by atomic layer deposition on spinel MnFe2O4 nanoparticles prepared by Wet Chemical Synthesis. The composite layers exhibited nonlinear polarization behavior in both magnetic and electric fields at room temperature. The magnetic coercive force, HC, was 30–40 Oe at room temperature. The width of electrical charge – voltage hysteresis loop reached 3.6 MV/cm.
