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Issue 31, 2017
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Electrodeposited high strength, thermally stable spectrally selective rhenium nickel inverse opals

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Abstract

Rhenium–Nickel (RexNi100−x) based 3D metallic inverse opals (IOs) were realized via colloidal crystal templated electrodeposition from an aqueous electrolyte. By varying the electrodeposition parameters, x could be varied from 0 to 88. Under reducing conditions, the rhenium-rich IOs were structurally stable to temperatures of at least 1000 °C for 5 h and for at least 12 h after coating with a thin layer of Al2O3. This demonstrated level of thermal stability is significantly improved compared to previously reported electrodeposited refractory inverse opals with similar characteristic dimensions. A strong frequency dependence in the optical reflection, which ranged from ∼5% around 1.5 μm to ∼65% around 5 μm, is predicted by simulations and experimentally observed, indicating the potential of this structure as a high temperature spectrally selective optical absorber/emitter. The elastic modulus of the ReNi IO structure is ∼35 GPa and the hardness is ∼0.8 GPa. Both these properties are much higher than those of Ni inverse opals and other periodically porous materials with similar characteristic pore dimensions. We suggest this work provides a promising approach for thermally stable mesostructured materials for high temperature catalyst supports, refractory photonics and mechanical applications including high temperature filtration, and high temperature actuators.

Graphical abstract: Electrodeposited high strength, thermally stable spectrally selective rhenium nickel inverse opals

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Publication details

The article was received on 18 May 2017, accepted on 14 Jul 2017 and first published on 27 Jul 2017


Article type: Paper
DOI: 10.1039/C7NR03567E
Citation: Nanoscale, 2017,9, 11187-11194
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    Electrodeposited high strength, thermally stable spectrally selective rhenium nickel inverse opals

    R. Zhang, J. Cohen, S. Fan and P. V. Braun, Nanoscale, 2017, 9, 11187
    DOI: 10.1039/C7NR03567E

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