Although other near-infrared-emitting materials exist, "Egyptian blue is composed of abundant and inexpensive elements — calcium, copper, silicon, and oxygen — in contrast to other near-infrared-emitting materials that contain rare earth elements. This feature could provide economic and environmental benefits to future applications," Salguero said

The scientists are now investigating similar materials, but it remains uncertain how Egyptian blue might be relatively durable given how easily it comes apart in hot water.

"It is important for us to understand how materials change over time and how they can be affected by their environments," Stein said.

2 Comments

1. 1. RPhoenix 12:09 PM 3/13/13

   I find this fascinating, and would love to see an explanation of the capture/re-radiation dynamics, and the (crystalline?) structure of the compound. Off to study the compound via other sources.
   I wonder how/if Egyptian blue would interact with graphene (both being thin sheet materials)? Is this something that could be studied at home (all safe chemicals/processes, as far as I know...)?

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2. 2. RPhoenix 12:46 PM 3/13/13

   Correction: from http://www.naturalpigments.com/detail.asp?PRODUCT_ID=417-15S
   
   "Toxicity
   Egyptian blue contains cooper, which is rated as toxic from prolonged exposure if inhaled or ingested. Care should be used in handling the dry powder pigment to avoid inhaling the dust."

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