* . *
  • About
  • Advertise
  • Privacy & Policy
  • Contact
Sunday, June 1, 2025
Earth-News
  • Home
  • Business
  • Entertainment

    Unveiling the Enigmatic: First Looks at Destruction and Puck in ‘The Sandman

    Jackie Chan Reveals This Family Member ‘Never Watched’ The Whole Of Any Of His Movies – Yahoo

    Jackie Chan Reveals This Family Member ‘Never Watched’ The Whole Of Any Of His Movies – Yahoo

    Mavs CEO holds firm on new arena, entertainment district in Dallas – Dallas News

    Mavs CEO Stands Strong on Vision for New Arena and Entertainment District in Dallas

    Entertainment: On Your Marks, Get Set, Beer Run! – Urban Milwaukee

    Get Ready to Race: The Ultimate Beer Run Experience Awaits!

    Rachel Guttman Launches Entertainment Law Firm Gutt Law, PLLC [Exclusive] – MusicRow.com

    Rachel Guttman Unveils Exciting New Entertainment Law Firm: Gutt Law, PLLC!

    HYBE Cashes In: Offloads Final Stake in K-Pop Rival SM Entertainment for $177 Million!

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Bajeed Pattan Joins Forbes Technology Council as Innovation Leader – PRWeb

    Bajeed Pattan Takes the Helm as Innovation Leader at Forbes Technology Council!

    Lafayette Regional Technology Council – Tech Leadership That’s Homegrown and Future-Focused – Discover Lafayette

    Lafayette Regional Technology Council – Tech Leadership That’s Homegrown and Future-Focused – Discover Lafayette

    Drone technology demo in Cambria County showcases future of lifesaving medical deliveries – local21news.com

    Revolutionizing Healthcare: Drone Technology Takes Flight for Lifesaving Medical Deliveries in Cambria County

    Revolutionary Harvesting Technology Promises to Slash CAR-T Manufacturing Costs!

    Stop the Machines: The Rise of Anti-Technology Extremism – International Centre for Counter-Terrorism – ICCT

    Unplugged: The Surge of Anti-Technology Extremism

    Finland to head EU’s quantum defense technology project – Latest news from Azerbaijan

    Finland Takes the Lead in Pioneering EU’s Quantum Defense Technology Initiative!

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment

    Unveiling the Enigmatic: First Looks at Destruction and Puck in ‘The Sandman

    Jackie Chan Reveals This Family Member ‘Never Watched’ The Whole Of Any Of His Movies – Yahoo

    Jackie Chan Reveals This Family Member ‘Never Watched’ The Whole Of Any Of His Movies – Yahoo

    Mavs CEO holds firm on new arena, entertainment district in Dallas – Dallas News

    Mavs CEO Stands Strong on Vision for New Arena and Entertainment District in Dallas

    Entertainment: On Your Marks, Get Set, Beer Run! – Urban Milwaukee

    Get Ready to Race: The Ultimate Beer Run Experience Awaits!

    Rachel Guttman Launches Entertainment Law Firm Gutt Law, PLLC [Exclusive] – MusicRow.com

    Rachel Guttman Unveils Exciting New Entertainment Law Firm: Gutt Law, PLLC!

    HYBE Cashes In: Offloads Final Stake in K-Pop Rival SM Entertainment for $177 Million!

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Bajeed Pattan Joins Forbes Technology Council as Innovation Leader – PRWeb

    Bajeed Pattan Takes the Helm as Innovation Leader at Forbes Technology Council!

    Lafayette Regional Technology Council – Tech Leadership That’s Homegrown and Future-Focused – Discover Lafayette

    Lafayette Regional Technology Council – Tech Leadership That’s Homegrown and Future-Focused – Discover Lafayette

    Drone technology demo in Cambria County showcases future of lifesaving medical deliveries – local21news.com

    Revolutionizing Healthcare: Drone Technology Takes Flight for Lifesaving Medical Deliveries in Cambria County

    Revolutionary Harvesting Technology Promises to Slash CAR-T Manufacturing Costs!

    Stop the Machines: The Rise of Anti-Technology Extremism – International Centre for Counter-Terrorism – ICCT

    Unplugged: The Surge of Anti-Technology Extremism

    Finland to head EU’s quantum defense technology project – Latest news from Azerbaijan

    Finland Takes the Lead in Pioneering EU’s Quantum Defense Technology Initiative!

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

Thermal Transistors Handle Heat With No Moving Parts

November 13, 2023
in Science
Thermal Transistors Handle Heat With No Moving Parts
Share on FacebookShare on Twitter

Electronic transistors are central to modern electronics. These devices precisely control the flow of electricity, but in doing so, they generate heat. Now, researchers at the University of California Los Angeles have developed a solid-state thermal transistor—the first device of its kind that can use an electric field to control the flow of heat through electronics. Their study, which was recently published in Science, demonstrates the capabilities of the new technology.

“There has been a strong desire from engineers and scientists to control heat transfer the same way we control electronics, but it has been very challenging,” says study lead author Yongjie Hu, a professor of mechanical and aerospace engineering at UCLA.

Historically, electronics have been cooled down with heat sinks that passively draw the excess heat away. More active approaches to thermal management have also been proposed, but these often rely on moving parts or fluids and can take a long time—typically minutes to hours—to ramp up or ramp down the material’s thermal conductivity. With thermal transistors, the researchers can actively modulate the flow of heat faster and with more precision. This speed makes them a promising option for managing heat in electronic devices.

“I think we are living in a kind of thermal renaissance.” —Miguel Muñoz Rojo, Material Science Institute of Madrid

Analogous to an electronic transistor, the UCLA group’s thermal transistor also uses electric fields to modulate the conductance of a channel, in this case thermal conductance rather than electrical. This is done with a thin film of cage-like molecules that the researchers engineered that acts as the channel of the transistor; applying an electric field makes the molecular bonds in the film stronger, which increases its thermal conductance. “Our contribution was literally only one molecule thin,” says Paul Weiss, a professor of chemistry, bioengineering, and material science at UCLA and the study’s co-author.

With that single-molecule layer, the researchers were able to reach the maximum change in conductivity at a frequency of more than 1 megahertz, several orders of magnitude faster than other heat management systems. Molecular motion typically controls heat flow in other types of thermal switches. But molecular motion is quite slow compared to the motion of electrons, explains Weiss. By leveraging electric fields, the researchers are able to speed up the switch from millihertz to megahertz frequencies.

Molecular motion also can’t achieve as large a difference in thermal conductance between the on-state and the off-state. The UCLA device, by comparison, achieves a 13-fold difference. “It really is an enormous difference, both in terms of magnitude and speed,” Weiss says.

With these improvements, the device could be important for cooling processors. The transistors are especially promising for semiconductors because they use a small amount of power to control the heat flow, compared to other routes of active energy dissipation. Many thermal transistors could also be integrated on the same chip in the same way electronic transistors are, Hu says.

In particular, thermal transistors could effectively manage heat in new semiconductor designs, such as in 3D-stacked chiplets where they would allow for more freedom in the design of the chiplets by reducing hot spots. They may also help cool power electronics made from wide-bandgap semiconductors like gallium nitride and silicon carbide, Hu says.

“Our contribution was literally only one molecule thin.” —Paul Weiss, UCLA

Beyond these applications in electronics, the UCLA researchers’ work on thermal transistors could also provide insights into molecular-level mechanisms of how living cells regulate temperature. Hu thinks that there may be a similar effect connecting heat flow and electric potential at work in our cells. In a separate ongoing project, he is studying the mechanisms of ion channels—the proteins that act as gates to control the flow of ions across a cell membrane. When it comes to heat flow in the human body, “the macroscopic picture has been established in physiology, however the molecular-level mechanism still remains largely unknown,” Hu says.

“I think we are living in a kind of thermal renaissance,” says Miguel Muñoz Rojo, a senior researcher at the Material Science Institute of Madrid. Muñoz Rojo is excited about the possibility of thermal transistors adding to the stock of heat management technologies, and is interested in the possibility of using them for a wide array of large-scale applications, like refrigeration, in addition to the nanoscale cooling of electronics. He and his colleague Andrej Kitanovski, a thermal engineering professor at the University of Ljubljana in Slovenia, are working together to develop these thermal management technologies. For Muñoz Rojo, that range of potential uses makes thermal transistors the pinnacle of heat management technology.

The demonstration of this technology is an exciting advance and will likely motivate more fundamental research, says Geoff Wehmeyer, an assistant professor of mechanical engineering at Rice University in Houston. “It will be interesting to see if thermal engineers can find ways to integrate these molecular thermal switches into switchable thermal management systems for electronics or batteries.”

While this proof-of-concept is promising, the technology is still early in its development, the UCLA researchers acknowledge. Going forward, Hu says they aim to further improve the device’s performance.

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : IEEE – https://spectrum.ieee.org/thermal-transistor

Tags: sciencethermalTransistors
Previous Post

MIT Professor’s IoT Sensors Make Roads Safer

Next Post

NASA Astronaut to Speak with Florida Students from Space Station

Some birds are left behind in a race to beat the heat – Nature

Some birds are left behind in a race to beat the heat – Nature

June 1, 2025
A passing star could fling Earth out of orbit – Science News

A passing star could fling Earth out of orbit – Science News

June 1, 2025
John Hancock Multimanager Lifestyle Moderate Portfolio Q1 2025 Commentary (JALMX) – Seeking Alpha

Unlocking Potential: Insights from the John Hancock Multimanager Lifestyle Moderate Portfolio Q1 2025

June 1, 2025
Editorial: The world promised by AI isn’t necessarily a better one – Pittsburgh Post-Gazette

Editorial: The world promised by AI isn’t necessarily a better one – Pittsburgh Post-Gazette

June 1, 2025
Little Rock economy growing faster than other similarly-sized cities, study shows – thv11.com

Little Rock’s Economy Outpaces Peers: A Promising Growth Story!

June 1, 2025

Unveiling the Enigmatic: First Looks at Destruction and Puck in ‘The Sandman

June 1, 2025
Why Gen Z Will Demand Crypto-Enabled Health Systems – Forbes

How Gen Z is Shaping the Future of Crypto-Enabled Health Systems

June 1, 2025
State Sen. Skoufis declares war on en­ter­tainment ticketing practices in closing days of session – Spectrum News

State Senator Skoufis Takes a Stand Against Unfair Ticketing Practices in Final Session Push!

June 1, 2025
Bajeed Pattan Joins Forbes Technology Council as Innovation Leader – PRWeb

Bajeed Pattan Takes the Helm as Innovation Leader at Forbes Technology Council!

June 1, 2025
With college sports in limbo and key issues coming to a head, the spotlight is on the SEC: ‘It’s going to get heated’ – Yahoo Sports

SEC Showdown: Tensions Rise as College Sports Face Uncertain Future

June 1, 2025

Categories

Archives

June 2025
MTWTFSS
 1
2345678
9101112131415
16171819202122
23242526272829
30 
« May    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (20,132)
  • Ecology (656)
  • Economy (671)
  • Entertainment (21,577)
  • General (15,254)
  • Health (9,713)
  • Lifestyle (673)
  • News (22,149)
  • People (672)
  • Politics (679)
  • Science (15,891)
  • Sports (21,175)
  • Technology (15,658)
  • World (659)

Recent News

Some birds are left behind in a race to beat the heat – Nature

Some birds are left behind in a race to beat the heat – Nature

June 1, 2025
A passing star could fling Earth out of orbit – Science News

A passing star could fling Earth out of orbit – Science News

June 1, 2025
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version