Rapid solid-state metathesis routes to nanostructured silicon-germainum

US8808658B2 · kind B2 · utility

Assignees

• CALIFORNIA INSTITUTE OF TECHNOLOGY · US
• The Regents of the University of California · US

Inventors

• Richard B. Kaner · Santa Monica, US
• Sabah K. Bux · Chino Hills, US
• Jean-Pierre Fleurial · Duarte, US
• Marc Rodriguez · Mataró, ES

Key dates

• Filing date: Jun 8, 2011
• Grant date: Aug 19, 2014
• Expiry date: Oct 3, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2998/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Methods for producing nanostructured silicon and silicon-germanium via solid state metathesis (SSM). The method of forming nanostructured silicon comprises the steps of combining a stoichiometric mixture of silicon tetraiodide (SiI4) and an alkaline earth metal silicide into a homogeneous powder, and initating the reaction between the silicon tetraiodide (SiI4) with the alkaline earth metal silicide. The method of forming nanostructured silicon-germanium comprises the steps of combining a stoichiometric mixture of silicon tetraiodide (SiI4) and a germanium based precursor into a homogeneous powder, and initiating the reaction between the silicon tetraiodide (SiI4) with the germanium based precursors.