Answer to What is This on the Cover of American Laboratory February

The image on the cover of American Laboratory February showed a fingerprint. A fingerprint on a polymer slide was cut with femtosecond-pulsed laser ablation. The nonconductive specimen was sputtered with an approximately 5-nm-thick AuPd-layer. The image was captured by Andreas Steiger-Thirsfeld and colored by Karin Whitmore (Technical University Vienna, University Service-Center of Transmission Electron Microscopy) using SEM imaging with SE, 10 kV accelerating voltage, in high vacuum, original magnification 100×.

Congratulations to tlnelson2, the winner of this month’s Amazon gift card.

If you have an image you would like to submit for use on one of our covers, please contact smessinger@americanlaboratory.com.

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