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12.968 Aktuelle Fachpublikationen zum Thema Gold

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Towards a general acid-based method for the determination of gold in ore samples by inductively-coupled plasma-mass spectrometry (ICP-MS), together with an investigation of solvent extraction of gold for analytical determination by microwave-induced plasma-atomic emission spectrometry (MIP-AES)

03.07.2018 | Wryan Helmeczi; William Erick Helmeczi; Laura Agnes Baker; Yong Wang; I D Brindle, Journal of Analytical Atomic Spectrometry, 2018

In this paper, we explore a variety of aqueous digestion techniques for the determination of gold, in a wide variety of mineral matrices. These include feldspar, basalt, pyrites, and other gold-containing minerals. The acid-based digestion methods compete effectively with fire assay to deliver ...

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Synthesis and characterisation of fluorescent aminophosphines and their coordination to gold(I)

03.07.2018 | Lara M. Groves; Benjamin D. Ward; Paul D. Newman; Peter N. Horton; Simon J. Coles; Simon J. A. Pope, Dalton Transactions, 2018

Three novel fluorescent aminophosphine ligands have been synthesised that incorporate napthyl (L1), pyrenyl (L2) and anthraquinone (L3) chromophores into their structures. The ligands react with [AuCl(tht)] (tht = tetrahydrothiophene) to give neutral complexes of the form [AuCl(L1–3)]. Solid ...

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Facile synthesis of a red light-inducible overall water-splitting photocatalyst using gold as a solid-state electron mediator

03.07.2018 | Kento Kamijyo; Toshihiro Takashima; Masaomi Yoda; Junya Osaki; Hiroshi Irie, Chemical Communication, 2018

We facilely prepared a solid-state heterojunction photocatalyst in which zinc rhodium oxide (ZnRh2O4) and bismuth vanadium oxide (Bi4V2O11) as hydrogen (H2) and oxygen (O2) evolution photocatalysts, respectively, were connected with gold (Au) to generate ZnRh2O4/Au/Bi4V2O11. ZnRh2O4/Au/Bi4V2O11 ...

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Room Temperature Carbon Monoxide Oxidation over Two-Dimensional Gold-Loaded Mesoporous Iron Oxide Nanoflakes

03.07.2018 | Yusuf Kaneti; Shunsuke Tanaka; Yohei Jikihara; Tsuruo Nakayama; Yoshio Bando; M Haruta; Mohammad Shahriar Hossain; D ..., Chemical Communication, 2018

In this work, we fabricate a highly effective catalyst for carbon monoxide oxidation based on gold-loaded mesoporous maghemite nanoflakes which exhibit nearly 100% CO conversion and a very high specific activity of 8.41 molCO gAu‒1 h‒1 at room temperature. Such excellent catalytic activity is ...

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Heterogeneous to homogeneous melting transition visualized with ultrafast electron diffraction

29.06.2018 | M. Z. Mo; Z. Chen; R. K. Li; M. Dunning; B. B. L. Witte; J. K. Baldwin; L. B. Fletcher; J. B. Kim; A. Ng; R. Redmer; ..., Science , 2018

The ultrafast laser excitation of matters leads to nonequilibrium states with complex solid-liquid phase-transition dynamics. We used electron diffraction at mega–electron volt energies to visualize the ultrafast melting of gold on the atomic scale length. For energy densities approaching the ...

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Golden ultrafast melting

29.06.2018 | Caroline Ash; Brent Grocholski, Science , 2018

Condensed Matter Understanding fast melting of metals is important for applications such as welding and micromachining. However, fast melting leaves simulation as the only option for probing the process. Mo et al. performed ultrafast electron diffraction experiments on laser-pulsed gold films. ...

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Materials, Vol. 11, Pages 1116: Biomaterials in Tendon and Skeletal Muscle Tissue Engineering: Current Trends and Challenges

29.06.2018 | Beldjilali-Labro, Megane ; Garcia Garcia, Alejandro ; Farhat, Firas ; Bedoui, Fahmi ; Grosset, Jean-François ; Dufre ..., Materials, 2018

Materials, Vol. 11, Pages 1116: Biomaterials in Tendon and Skeletal Muscle Tissue Engineering: Current Trends and Challenges Materials doi: 10.3390/ma11071116 Authors: Megane Beldjilali-Labro Alejandro Garcia Garcia Firas Farhat Fahmi Bedoui Jean-François Grosset Murielle ...

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Molecules, Vol. 23, Pages 1567: Iron Oxide Nanoparticles in Photothermal Therapy

28.06.2018 | Estelrich, Joan ; Busquets, Maria Antònia, Molecules, 2018

Molecules, Vol. 23, Pages 1567: Iron Oxide Nanoparticles in Photothermal Therapy Molecules doi: 10.3390/molecules23071567 Authors: Joan Estelrich Maria Antònia Busquets Photothermal therapy is a kind of therapy based on increasing the temperature of tumoral cells above 42 ...

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Materials, Vol. 11, Pages 1091: Hybrid Metasurface Based Tunable Near-Perfect Absorber and Plasmonic Sensor

27.06.2018 | Rifat, Ahmmed A.; Rahmani, Mohsen ; Xu, Lei ; Miroshnichenko, Andrey E., Materials, 2018

Materials, Vol. 11, Pages 1091: Hybrid Metasurface Based Tunable Near-Perfect Absorber and Plasmonic Sensor Materials doi: 10.3390/ma11071091 Authors: Ahmmed A. Rifat Mohsen Rahmani Lei Xu Andrey E. Miroshnichenko We propose a hybrid metasurface-based perfect absorber which ...

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Gold nanoparticle-decorated graphene as a nonlinear optical material in the visible and near-infrared spectral range

26.06.2018 | Karolina Kinastowska; Katarzyna Piela; Marta Dominika Gordel-Wojcik; Andrzej Żak; Radosław Kołkowski; Marek Samoc, Physical Chemistry Chemical Physics, 2018

There have been numerous reports of boosting the nonlinear optical phenomena in plasmonic nanostructures through the local-field enhancement as well as through the intrinsic metal nonlinearities. Here, we study the possibility of plasmonic nenhancement of graphene’s nonlinear absorption by ...

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