The Race to Make a Great Fake Steak

With funding from food giant Unilever, a Dutch engineer is fine-tuning a machine designed to help make meat obsolete

11 min read
Photo: Niels Blekemolen
Photo: Niels Blekemolen

Atze Jan van der Goot removes a laptop-size slab from a refrigerator and deposits it on a table with an icy thump. It’s a reddish-brown mass, with clearly visible fibrous striations. And though it’s half frozen, it’s still pliable: You can pick away small pieces with your fingers, but it retains its shape, just like a hunk of frigid raw beef would.

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Superlattices Could Make Bulky Capacitors Obsolete

Researchers hope artificial antiferroelectric capacitors could help miniaturize electronics further

3 min read
A grid of arrows pointing in different directions

In artificial antiferroelectric structures, electric dipoles are normally arranged in ways that lead to zero electric polarization.

Luxembourg Institute of Science and Technology/Science Advances

One roadblock to shrinking present-day electronics is the relatively large size of their capacitors. Now scientists have developed new "superlattices" that might help build capacitors as small as one-hundredth the size of conventional ones.

Whereas batteries store energy in chemical form, capacitors store energy in an electric field. Batteries typically possess greater energy densities than capacitors—they can store more energy for their weight. However, capacitors usually have greater power densities than batteries—they charge and discharge more quickly. This makes capacitors useful for applications involving pulses of power.

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No More Invasive Surgery—This Pacemaker Dissolves Instead

Temporary pacemakers are often vital but dangerous to remove when their jobs are done

3 min read
Animated gif of a device with a coil on one end dissolving between days 1 and 60.

The transient pacemaker, developed at Northwestern University in Evanston, Ill., harmlessly dissolves in the patient's body over time.

Northwestern University

After having cardiovascular surgery, many patients require a temporary pacemaker to help stabilize their heart rate. The device consists of a pulse generator, one or more insulated wires, and an electrode at the end of each wire.

The pulse generator—a metal case that contains electronic circuitry with a small computer and a battery—regulates the impulses sent to the heart. The wire is connected to the pulse generator on one end while the electrode is placed inside one of the heart’s chambers.

But there are several issues with temporary pacemakers: The generator limits the patient’s mobility, and the wires must be surgically removed, which can cause complications such as infection, dislodgment, torn or damaged tissues, bleeding, and blood clots.

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A Multiphysics Approach to Designing Fuel Cells for Electric Vehicles

White paper on fuel cell modeling and simulation

1 min read
Comsol Logo
Comsol

Fuel cell electric vehicles (FCEVs) often reach higher energy density and exhibit greater efficiency than battery EVs; however, they also have high manufacturing costs, limited service life, and relatively low power density.

Modeling and simulation can improve fuel cell design and optimize EV performance. Learn more in this white paper.