From UMass Amherst via COSMOS Magazine: “Generating electricity ‘out of thin air'”

U Mass Amherst

From UMass Amherst

via

Cosmos Magazine bloc

COSMOS Magazine

18 February 2020
Nick Carne

Researchers unveil a new device powered by a microbe.

1
Graphic image of a thin film of protein nanowires generating electricity from atmospheric humidity. UMass Amherst/Yao and Lovley labs.

Scientists in the US have developed a device they say uses a natural protein to create electricity from moisture in the air.

Writing in the journal Nature, electrical engineer Jun Yao and microbiologist Derek Lovley, from the University of Massachusetts Amherst, introduce the Air-gen (or air-powered generator), which Lovley describes as “the most amazing and exciting application of protein nanowires yet”.

Air-Gen has electrically conductive protein nanowires produced by the microbe Geobacter, which Lovley discovered in the Potomac River three decades ago and has been working with ever since, in particular investigating its potential for “green electronics”.

The Air-gen connects electrodes to the protein nanowires in such a way that electrical current is generated from the water vapour naturally present in the atmosphere.

It requires only a thin film of protein nanowires less than 10 microns thick. The bottom of the film rests on an electrode, while a smaller electrode that covers only part of the nanowire film sits on top.

The film adsorbs water vapour from the atmosphere. A combination of the electrical conductivity and surface chemistry of the protein nanowires, coupled with the fine pores between the nanowires within the film, establishes the conditions that generate an electrical current between the two electrodes.

Developed in Yao’s lab, Air-gen is low-cost, non-polluting and renewable, and needs neither sun nor wind, the researchers say. It can work indoors, or in extremely low humidity of the desert.

The current generation can power only small electronics, but they hope to bring it to commercial scale soon. Beyond that is the idea a small Air-gen “patch” that can power electronic wearables such as health and fitness monitors and smart watches. And then, maybe, there are mobile phones.

“The ultimate goal is to make large-scale systems,” says Yao. “For example, the technology might be incorporated into wall paint that could help power your home. Or, we may develop stand-alone air-powered generators that supply electricity off the grid.”

Lovley also is working to improve the practical biological capabilities of Geobacter. His lab recently developed a new microbial strain to more rapidly and inexpensively mass produce protein nanowires.

“We turned E. coli into a protein nanowire factory,” he says. “With this new scalable process, protein nanowire supply will no longer be a bottleneck to developing these applications.”

The Royal Institution of Australia has an education resource based on this article.
You can access it here.

See the full article here .

five-ways-keep-your-child-safe-school-shootings

Please help promote STEM in your local schools.

Stem Education Coalition

John Schaefer


For new music by living composers

newsounds.org from New York Public Radio


https://www.wnyc.org/
93.9FM
https://www.wqxr.org/
105.9FM

Home

For great Jazz

88.3FM http://wbgo.org/

WPRB 103.3FM


Please visit The Jazz Loft Project based on the work of Sam Stephenson
Please visit The Jazz Loft Radio project from New York Public Radio

U Mass Amherst campus

UMass Amherst, the Commonwealth’s flagship campus, is a nationally ranked public research university offering a full range of undergraduate, graduate and professional degrees.

As the flagship campus of America’s education state, the University of Massachusetts Amherst is the leader of the public higher education system of the Commonwealth, making a profound, transformative impact to the common good. Founded in 1863, we are the largest public research university in New England, distinguished by the excellence and breadth of our academic, research and community outreach programs. We rank 29th among the nation’s top public universities, moving up 11 spots in the past two years in the U.S. News & World Report’s annual college guide.