Engineers at the University of California San Diego have developed a super-hydrophobic surface that can be used to generate electrical voltage.
When salt water flows over this specially patterned surface, it can produce at least 50 millivolts. The proof-of-concept work could lead to the development of new power sources for lab-on-a-chip platforms and other microfluidics devices. It could someday be extended to energy harvesting methods in water desalination plants, researchers said.
A team of researchers led by Prab Bandaru, a professor of mechanical and aerospace engineering at the UC San Diego Jacobs School of Engineering, and first author Bei Fan, a graduate student in Bandaru’s research group, published their work in the Oct. 3 issue of Nature Communications.
The main idea behind this work is to create electrical voltage by moving ions over a charged surface. And the faster you can move these ions, the more voltage you can generate, explained Bandaru.
Bandaru’s team created a surface so hydrophobic that it enables water (and any ions it carries) to flow faster when passing over. The surface also holds a negative charge, so a rapid flow of positive ions in salt water with respect to this negatively charged surface results in an electrical potential difference, creating an electrical voltage.
“The reduced friction from this surface as well as the consequent electrical interactions helps to obtain significantly enhanced electrical voltage,” said Bandaru.
The surface was made by etching tiny ridges into a silicon substrate and then filling the ridges with oil (such as synthetic motor oil used for lubrication). In tests, dilute salt water was transported by syringe pump over the surface in a microfluidic channel, and then the voltage was measured across the ends of the channel.
There have been previous reports on super-hydrophobic, or so-called “lotus leaf” surfaces designed to speed up fluid flow at the surface. However, these surfaces have so far been patterned with tiny air pockets—and since air does not hold charge, the result is a smaller electric potential difference and thus, a smaller voltage. By replacing air with a liquid like synthetic oil—which holds charge and won’t mix with salt water—Bandaru and Fan created a surface that produces at least 50 percent more electrical voltage than previous designs. According to Bandaru, higher voltages may also be obtained through faster liquid velocities and narrower and longer channels.
Moving forward, the team is working on creating channels with these patterned surfaces that can produce more electrical power.
The Latest on: Electricity generation
[google_news title=”” keyword=”electricity generation” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Electricity generation
- The Key to Fast Charging Electric Cars Is Flying 248 Miles Above Our Headson November 20, 2022 at 10:46 am
It’s not so simple to make faster electric vehicle chargers, because the increased electricity means excess heat, too.A NASA experiment meant to cool electronics aboard spacecraft could also find its ...
- This Heavily-Tuned C8 Generation RS7 Is Nothing But A Speed Demonon November 20, 2022 at 10:31 am
But this RS7 can now join the limited 1,000-plus-hp club. The engine modifications from Brex Tuning have added another 449 horsepower, totaling 1,040 ponies for this ludicrous RS7. The torque has seen ...
- Energy bill up? Here’s how electricity costs have changed over the past yearon November 20, 2022 at 8:12 am
Electricity costs across the U.S. are making their biggest jumps since the last major economic downturn. Despite pushing to build more renewable energy sources over the last decade, fossil fuels ...
- Federal legislation to increase renewable energy incentives for Nevada homeowners, including solaron November 18, 2022 at 11:37 am
Nevada is showing itself as a leader in generating electricity from solar energy. But what’s that mean for residential homeowners, especially those in Clark County?
- (Opinion) The more solar energy NH uses, the more ratepayers gainon November 18, 2022 at 6:55 am
These are difficult days for anyone buying electricity in New Hampshire. That’s true for families, schools and nonprofits. It’s also true for businesses like ours, which consume millions of ...
- The Qualcomm Snapdragon 8 Gen 2 will power the next generation of flagship Android phoneson November 18, 2022 at 3:38 am
Qualcomm is back with another flagship processor set to take the next generation of high-end Android phones to the next level.
- Electricity Generation Market Will hold the largest industry share owing to the rising market popularity in Global countrieson November 18, 2022 at 12:39 am
Get a Sample PDF of report @ The Electricity Generation market report provides a detailed analysis of global market size, regional and country-level market size, segmentation market growth, market ...
- Commercial Solar Power Generation Systems Market : An complete research On Upcoming Trends And Growth Opportunities from 2023-2027on November 17, 2022 at 8:25 pm
Commercial Solar Power Generation Systems Market [Spreadsheet of 103 Pages] explore investment in Market. It classify ...
- Nuclear power in Kitsap? Not happening. But 'Navy nukes' will keep generating it elsewhereon November 16, 2022 at 12:36 pm
Many sailors trained to operate nuclear reactors, including those based at Kitsap, go on jobs operating America's nuclear power plants.
via Bing News