Stories tagged crystalline sieves

May
20
2007

Nanotech sponges can absorb hydrogen, carbon dioxide, or methane.

COF-108: Credit: José L. Mendoza-Cortés
COF-108: Credit: José L. Mendoza-Cortés
Omar Yaghi was named one of the "Brilliant 10" by Popular Science magazine last fall, describing him as a "hydrogen nano-architect". Like an architect, Yaghi links together well-defined molecules like building blocks to create porous crystalline structures. Referred to as metal-organic frameworks, or MOFs, these crystal sponges have nanosized openings which can be customized to soak up only molecules of a particular size (like hydrogen or methane). MOFs could lead to the first workable fuel tanks for a hydrogen cars, or laptops and cell phones.

New material sets record for most surface area per gram.

Yaghi's newest material, called covalent organic frameworks, or COFs "(pronounced "coffs") are crystalline porous organic networks. A member of this series, COF-108, has the lowest density reported of any crystalline material. One gram of COF-108, has a surface area equal to 30 tennis courts. Yaghi specifically cited COFs as a possible storage medium for carbon dioxide capture and sequestration systems.

Learn more about Omar Yaghis and his research: