Proc Natl Acad Sci U S A.  2010 Sep 21; 107(38): 16428–16431. |  David W. Keith¹

Photophoretic levitation of engineered aerosols for geoengineering

The use of electrostatic or magnetic materials enables a class of photophoretic forces not found in nature. Photophoretic levitation could loft particles above the stratosphere, reducing their capacity to interfere with ozone chemistry; and, by increasing particle lifetimes, it would reduce the need for continual replenishment of the aerosol.

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