New Microbot Based on Water Strider Bugs Can Jump Five Inches

The Citizen's Guide to the Future
July 28 2012 10:30 AM

New Microbot Based on Water Strider Bugs Can Jump Five Inches

A water strider in action
A water strider in action

Photograph from Wikimedia Commons.

There are plenty of examples of nature-inspired robots, and most of them are terrifying. Take the centipede robot and the Big Dog. Then there are those quadrotor drones that, while perhaps not just like something you find in nature, are at least reminiscent of dragonflies, and as Farhad Manjoo writes, will almost definitely take over the world.

When those quadrotors start to wrest control from us humans, don’t be surprised if they’re accompanied by these new microbots that look and act almost exactly like those water strider or Gerridae bugs you might have seen miraculously “walking” across creeks, ponds, and puddles.


Water strider bugs are able to do stay on top of water thanks to the water’s surface tension and their own slender and strong hydrophobic legs. In addition to spreading their weight over a large surface, the bugs also are covered with thousands of hairs per square millimeter that trap air and deflect liquid. Since water is full of polarized molecules that like to stay together, the bugs can effectively keep from sinking by staying dry—even if they’re hit with a wave when they’re jumping, which is how they actually move over liquid. Here’s a video:

Engineers have been working on water-skimming micro robots for years, but they haven’t been able to master the design problem of surface tension. To avoid obstacles and move efficiently the robots need to push down, and when they break the surface tension and get wet, they’re sunk.

The solution to the problem, detailed in American Chemical Society: Applied Materials, came via porous, super water-repellant nickel foam. Even though the new microbots weigh over 1000 times as much as a water strider, they can jump more than five inches at a time. The bio-inspired bot can avoid obstacles and stay afloat—and that means it could be a tool for everything from monitoring water quality to spying.

Future Tense is a partnership of SlateNew America, and Arizona State University.

Ben Johnson is the producer of Marketplace Tech from American Public Media.



Blacks Don’t Have a Corporal Punishment Problem

Americans do. But when blacks exhibit the same behaviors as others, it becomes part of a greater black pathology. 

I Bought the Huge iPhone. I’m Already Thinking of Returning It.

Scotland Is Just the Beginning. Expect More Political Earthquakes in Europe.

Lifetime Didn’t Think the Steubenville Rape Case Was Dramatic Enough

So they added a little self-immolation.

Two Damn Good, Very Different Movies About Soldiers Returning From War

Medical Examiner

The Most Terrifying Thing About Ebola 

The disease threatens humanity by preying on humanity.

Students Aren’t Going to College Football Games as Much Anymore, and Schools Are Getting Worried

The Good Wife Is Cynical, Thrilling, and Grown-Up. It’s Also TV’s Best Drama.

  News & Politics
Sept. 19 2014 9:15 PM Chris Christie, Better Than Ever
Business Insider
Sept. 20 2014 6:30 AM The Man Making Bill Gates Richer
Sept. 20 2014 7:27 AM How Do Plants Grow Aboard the International Space Station?
  Double X
The XX Factor
Sept. 19 2014 3:07 PM Everything Is a "Women's Issue"
  Slate Plus
Slate Picks
Sept. 19 2014 12:00 PM What Happened at Slate This Week? The Slatest editor tells us to read well-informed skepticism, media criticism, and more.
Brow Beat
Sept. 19 2014 4:48 PM You Should Be Listening to Sbtrkt
Future Tense
Sept. 19 2014 5:03 PM White House Chief Information Officer Will Run U.S. Ebola Response
  Health & Science
Bad Astronomy
Sept. 20 2014 7:00 AM The Shaggy Sun
Sports Nut
Sept. 18 2014 11:42 AM Grandmaster Clash One of the most amazing feats in chess history just happened, and no one noticed.