An Amorphous Phase of Zinc and Silicon at Composition Zn2Si5(:H, OH)

Feng, Xian-Juan; Böhme, Bodo; Bobnar, Matej; Simon, Paul; Carrillo-Cabrera, Wilder; Burkhardt, Ulrich; Schmidt, Marcus; Schwarz, Ulrich; Baitinger, Michael; Strassner, Thomas; Grin, Yuri

doi:10.1002/zaac.201600340

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An Amorphous Phase of Zinc and Silicon at Composition Zn₂Si₅(:H, OH)

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Feng, Xian-Juan
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126538

Böhme, Bodo
Bodo Böhme, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons146769

Bobnar, Matej
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126855

Simon, Paul
Paul Simon, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126563

Carrillo-Cabrera, Wilder
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126556

Burkhardt, Ulrich
Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126835

Schmidt, Marcus
Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126841

Schwarz, Ulrich
Ulrich Schwarz, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126529

Baitinger, Michael
Michael Baitinger, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126626

Grin, Yuri
Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Feng, X.-J., Böhme, B., Bobnar, M., Simon, P., Carrillo-Cabrera, W., Burkhardt, U., et al. (2016). An Amorphous Phase of Zinc and Silicon at Composition Zn₂Si₅(:H, OH). SI, 643(1), 106-113. doi:10.1002/zaac.201600340.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-09EC-D

Abstract

An amorphous phase at composition Zn2Si5(:H,OH) was prepared by oxidation of the precursor phase Li2ZnSi at 80 degrees C in the ionic liquid of n-dodecyltrimethylammonium chloride (DTAC) and AlCl3 in 1:1 molar ratio, followed by removal of elemental zinc by dilute aqueous HCl. The product was structurally amorphous according to HRTEM, XRPD, and Raman spectroscopy. Zn2Si5(:H,OH) forms layers embedded in a matrix of a silica by-product. On annealing at 150 degrees C, amorphous Zn2Si5(:H,OH) decomposed into crystalline Zn and -Si. The decomposition comes along with the release of H-2 revealed by TG-MS studies. IR and solid-state NMR spectroscopy revealed that the Zn2Si5 bulk is terminated by Si-OH and Si-H groups. The absence of Knight shift in the Si-29 NMR signal assigned to Zn2Si5(:H,OH) suggests semiconducting behavior.