Autonomous ‘Bugs’ Can Skim Ocean Bacteria to Collect Data

By oceannews.com.

Futurists predict that more than one trillion autonomous nodes will be integrated into all human activities by 2035 as part of the “Internet of Things.” Soon, pretty much any object—big or small—will feed information to a central database without the need for human involvement.

Making this idea tricky is that 71% of the Earth’s surface is covered in water, and aquatic environments pose critical environmental and logistical issues. To consider these challenges, the US Defense Advanced Research Projects Agency (DARPA) has started a program called the Ocean of Things.

Binghamton University Professor Seokheun “Sean” Choi, Anwar Elhadad, Ph.D. ’24, and Ph.D. student Yang “Lexi” Gao have developed a self-powered “bug” that can skim across the water, and they hope it will revolutionize aquatic robotics.

Over the past decade, Choi—a faculty member at the Thomas J. Watson School of Engineering and Applied Science’s Department of Electrical and Computer Engineering and director of the Center for Research in Advanced Sensing Technologies and Environmental Sustainability (CREATES)—has received research funding from the Office of Naval Research to develop bacteria-powered biobatteries that have a possible 100-year shelf life.

The new aquatic robots use similar technology because they are more reliable under adverse conditions than solar, kinetic, or thermal energy systems. A Janus interface, which is hydrophilic on one side and hydrophobic on the other, lets in nutrients from the water and keeps them inside the device to fuel bacterial spore production.

“When the environment is favorable for the bacteria, they become vegetative cells and generate power,” he said, “but when the conditions are not favorable—for example, it’s really cold or the nutrients are not available—they go back to spores. In that way, we can extend the operational life.”

read more at oceannews.com.