NANOTECHNOLOGY

Just one drop will do it

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Science  19 May 2017:
Vol. 356, Issue 6339, pp. 713
DOI: 10.1126/science.356.6339.713-a

Mr. Spock uses a handheld sensor with Scotty.

PHOTO: UNITED ARCHIVES/IFTN CINEMA COLLECTION/ALAMY

Handheld sensors, often found in science fiction stories as a way of collecting a broad spectrum of data with a single device, are becoming real devices through the continuous miniaturization of technology. Engel et al. combine an electronic array of sensors with optical microspectroscopy and atomic force microscopy, based on two-dimensional materials, on a single platform. Liquids can be distinguished both electronically and optically, and dynamic surface wetting can also be monitored. At the limits of the device, the topography and optical spectra of isolated oil emulsion droplets with volumes less than 10 attoliters could be determined.

Nano Lett. 10.1021/acs.nanolett.6b03561 (2017).

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