There has been a great interest in such structured films due to its potential applications in photolithography, near field microscopy and photonic devices.

这种结构的金属薄膜在光印刷、近场显微镜和光子器件等方面有着广泛的应用前景，近年来引起了人们的重视。

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The trace of this electrical charge left behind in the fingerprint is imaged using an electric field microscopy system.

FORBES: Can Forensic Scientists Tell How Old A Fingerprint Is?

The key to those sharper pics, it seems, is so-called "dark field microscopy, " a technique that, as NewScientist points out, is normally used by biologists.

ENGADGET: X-rays get boost from "dark field" technology

Secondly, the relatively small cost will likely lower the barrier to entry for advanced microscopy and make field diagnosis an easier and more viable option in places like Africa.

FORBES: Sciences