Thursday, March 15, 2012

US Patent 8135244 - Measuring shock pressure with nanocrystals

This patent from the US Department of Energy teaches an optical fiber pressure sensor using quantum dots to achieve an improved response time to measure shock waves. Claim 1 reads:

1. A method, comprising:

positioning nanocrystal quantum dots (NQDs) proximate to an energetic material, compressing said energetic material by detonation whereby a shift in band gap is produced in said NQDs; and

observing an electromagnetic product (EMP) of said shift in band gap during compression of said energetic material.