Semiconducting aerogels from cahacogenido clusters with broad applications
US7727506B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2008 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Apr 5, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/773
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Soluble chalcogenido clusters together with transition metal ions and main group elements are shown to provide gels having interconnected, open frameworks. Following supercritical drying with liquid carbon dioxide, the chalcogels may be converted to aerogels. The aerogels possess high internal surface areas with a broad pore size distribution that is dependent upon the precursors used and the aging conditions applied. Some of the gels are encompassed by formulas such as M4[M′4Qx]n, M4[M′2Qy]n, M4[M′Qx]n, M3[M″Qx]n, or Me2[M′″Qx]n, where M is a divalent, trivalent, or tetravalent metal ion; M′, M″, and M′″ are typically Ge, Sn, P, As, Sb, Mo, or W; and Q is typically S, Se, or Te. Methods of preparing the chalcogenido clusters are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.