• Resources
  • Blog
  • Journalists
  • Log In
  • Sign Up
  • Data Privacy
  • Send a Release
Cision PR Newswire: news distribution, targeting and monitoring home
  • News
  • Products
    • Overview
    • Distribution by PR Newswire
    • Cision Communications Cloud®
    • Cision IR
    • Sponsored Placement
    • All Products
  • Contact
    • General Inquiries
    • Request a Demo
    • Editorial Bureaus
    • Partnerships
    • Media Inquiries
    • Worldwide Offices

 

When typing in this field, a list of search results will appear and be automatically updated as you type.

Searching for your content...

No results found. Please change your search terms and try again.
  • News in Focus
      • Browse News Releases

      • All News Releases
      • All Public Company
      • English-only
      • News Releases Overview

      • Multimedia Gallery

      • All Multimedia
      • All Photos
      • All Videos
      • Multimedia Gallery Overview

      • Trending Topics

      • All Trending Topics
  • Business & Money
      • Auto & Transportation

      • All Automotive & Transportation
      • Aerospace, Defense
      • Air Freight
      • Airlines & Aviation
      • Automotive
      • Maritime & Shipbuilding
      • Railroads and Intermodal Transportation
      • Supply Chain/Logistics
      • Transportation, Trucking & Railroad
      • Travel
      • Trucking and Road Transportation
      • Auto & Transportation Overview

      • View All Auto & Transportation

      • Business Technology

      • All Business Technology
      • Blockchain
      • Broadcast Tech
      • Computer & Electronics
      • Computer Hardware
      • Computer Software
      • Data Analytics
      • Electronic Commerce
      • Electronic Components
      • Electronic Design Automation
      • Financial Technology
      • High Tech Security
      • Internet Technology
      • Nanotechnology
      • Networks
      • Peripherals
      • Semiconductors
      • Business Technology Overview

      • View All Business Technology

      • Entertain­ment & Media

      • All Entertain­ment & Media
      • Advertising
      • Art
      • Books
      • Entertainment
      • Film and Motion Picture
      • Magazines
      • Music
      • Publishing & Information Services
      • Radio & Podcast
      • Television
      • Entertain­ment & Media Overview

      • View All Entertain­ment & Media

      • Financial Services & Investing

      • All Financial Services & Investing
      • Accounting News & Issues
      • Acquisitions, Mergers and Takeovers
      • Banking & Financial Services
      • Bankruptcy
      • Bond & Stock Ratings
      • Conference Call Announcements
      • Contracts
      • Cryptocurrency
      • Dividends
      • Earnings
      • Earnings Forecasts & Projections
      • Financing Agreements
      • Insurance
      • Investments Opinions
      • Joint Ventures
      • Mutual Funds
      • Private Placement
      • Real Estate
      • Restructuring & Recapitalization
      • Sales Reports
      • Shareholder Activism
      • Shareholder Meetings
      • Stock Offering
      • Stock Split
      • Venture Capital
      • Financial Services & Investing Overview

      • View All Financial Services & Investing

      • General Business

      • All General Business
      • Awards
      • Commercial Real Estate
      • Corporate Expansion
      • Earnings
      • Environmental, Social and Governance (ESG)
      • Human Resource & Workforce Management
      • Licensing
      • New Products & Services
      • Obituaries
      • Outsourcing Businesses
      • Overseas Real Estate (non-US)
      • Personnel Announcements
      • Real Estate Transactions
      • Residential Real Estate
      • Small Business Services
      • Socially Responsible Investing
      • Surveys, Polls and Research
      • Trade Show News
      • General Business Overview

      • View All General Business

  • Science & Tech
      • Consumer Technology

      • All Consumer Technology
      • Artificial Intelligence
      • Blockchain
      • Cloud Computing/Internet of Things
      • Computer Electronics
      • Computer Hardware
      • Computer Software
      • Consumer Electronics
      • Cryptocurrency
      • Data Analytics
      • Electronic Commerce
      • Electronic Gaming
      • Financial Technology
      • Mobile Entertainment
      • Multimedia & Internet
      • Peripherals
      • Social Media
      • STEM (Science, Tech, Engineering, Math)
      • Supply Chain/Logistics
      • Wireless Communications
      • Consumer Technology Overview

      • View All Consumer Technology

      • Energy & Natural Resources

      • All Energy
      • Alternative Energies
      • Chemical
      • Electrical Utilities
      • Gas
      • General Manufacturing
      • Mining
      • Mining & Metals
      • Oil & Energy
      • Oil and Gas Discoveries
      • Utilities
      • Water Utilities
      • Energy & Natural Resources Overview

      • View All Energy & Natural Resources

      • Environ­ment

      • All Environ­ment
      • Conservation & Recycling
      • Environmental Issues
      • Environmental Policy
      • Environmental Products & Services
      • Green Technology
      • Natural Disasters
      • Environ­ment Overview

      • View All Environ­ment

      • Heavy Industry & Manufacturing

      • All Heavy Industry & Manufacturing
      • Aerospace & Defense
      • Agriculture
      • Chemical
      • Construction & Building
      • General Manufacturing
      • HVAC (Heating, Ventilation and Air-Conditioning)
      • Machinery
      • Machine Tools, Metalworking and Metallurgy
      • Mining
      • Mining & Metals
      • Paper, Forest Products & Containers
      • Precious Metals
      • Textiles
      • Tobacco
      • Heavy Industry & Manufacturing Overview

      • View All Heavy Industry & Manufacturing

      • Telecomm­unications

      • All Telecomm­unications
      • Carriers and Services
      • Mobile Entertainment
      • Networks
      • Peripherals
      • Telecommunications Equipment
      • Telecommunications Industry
      • VoIP (Voice over Internet Protocol)
      • Wireless Communications
      • Telecomm­unications Overview

      • View All Telecomm­unications

  • Lifestyle & Health
      • Consumer Products & Retail

      • All Consumer Products & Retail
      • Animals & Pets
      • Beers, Wines and Spirits
      • Beverages
      • Bridal Services
      • Cannabis
      • Cosmetics and Personal Care
      • Fashion
      • Food & Beverages
      • Furniture and Furnishings
      • Home Improvement
      • Household, Consumer & Cosmetics
      • Household Products
      • Jewelry
      • Non-Alcoholic Beverages
      • Office Products
      • Organic Food
      • Product Recalls
      • Restaurants
      • Retail
      • Supermarkets
      • Toys
      • Consumer Products & Retail Overview

      • View All Consumer Products & Retail

      • Entertain­ment & Media

      • All Entertain­ment & Media
      • Advertising
      • Art
      • Books
      • Entertainment
      • Film and Motion Picture
      • Magazines
      • Music
      • Publishing & Information Services
      • Radio & Podcast
      • Television
      • Entertain­ment & Media Overview

      • View All Entertain­ment & Media

      • Health

      • All Health
      • Biometrics
      • Biotechnology
      • Clinical Trials & Medical Discoveries
      • Dentistry
      • FDA Approval
      • Fitness/Wellness
      • Health Care & Hospitals
      • Health Insurance
      • Infection Control
      • International Medical Approval
      • Medical Equipment
      • Medical Pharmaceuticals
      • Mental Health
      • Pharmaceuticals
      • Supplementary Medicine
      • Health Overview

      • View All Health

      • Sports

      • All Sports
      • General Sports
      • Outdoors, Camping & Hiking
      • Sporting Events
      • Sports Equipment & Accessories
      • Sports Overview

      • View All Sports

      • Travel

      • All Travel
      • Amusement Parks and Tourist Attractions
      • Gambling & Casinos
      • Hotels and Resorts
      • Leisure & Tourism
      • Outdoors, Camping & Hiking
      • Passenger Aviation
      • Travel Industry
      • Travel Overview

      • View All Travel

  • Policy & Public Interest
      • Policy & Public Interest

      • All Policy & Public Interest
      • Advocacy Group Opinion
      • Animal Welfare
      • Congressional & Presidential Campaigns
      • Corporate Social Responsibility
      • Domestic Policy
      • Economic News, Trends, Analysis
      • Education
      • Environmental
      • European Government
      • FDA Approval
      • Federal and State Legislation
      • Federal Executive Branch & Agency
      • Foreign Policy & International Affairs
      • Homeland Security
      • Labor & Union
      • Legal Issues
      • Natural Disasters
      • Not For Profit
      • Patent Law
      • Public Safety
      • Trade Policy
      • U.S. State Policy
      • Policy & Public Interest Overview

      • View All Policy & Public Interest

  • People & Culture
      • People & Culture

      • All People & Culture
      • Aboriginal, First Nations & Native American
      • African American
      • Asian American
      • Children
      • Diversity, Equity & Inclusion
      • Hispanic
      • Lesbian, Gay & Bisexual
      • Men's Interest
      • People with Disabilities
      • Religion
      • Senior Citizens
      • Veterans
      • Women
      • People & Culture Overview

      • View All People & Culture

      • In-Language News

      • español
      • português
      • Česko
      • Danmark
      • Deutschland
      • España
      • France
      • Italia
      • Nederland
      • Norge
      • Polska
      • Portugal
      • Россия
      • Slovensko
      • Suomi
      • Sverige
  • Overview
  • Distribution by PR Newswire
  • Cision Communications Cloud®
  • Cision IR
  • Sponsored Placement
  • All Products
  • General Inquiries
  • Request a Demo
  • Editorial Bureaus
  • Partnerships
  • Media Inquiries
  • Worldwide Offices
  • PR Newswire: news distribution, targeting and monitoring
  • Send a Release
    • ALL CONTACT INFO
    • Contact Us

      888-776-0942
      from 8 AM - 10 PM ET

  • Send a Release
  • Sign Up
  • Log In
  • Resources
  • Blog
  • Journalists
  • RSS
  • GDPR
  • News in Focus
    • Browse All News
    • Multimedia Gallery
    • Trending Topics
  • Business & Money
    • Auto & Transportation
    • Business Technology
    • Entertain­ment & Media
    • Financial Services & Investing
    • General Business
  • Science & Tech
    • Consumer Technology
    • Energy & Natural Resources
    • Environ­ment
    • Heavy Industry & Manufacturing
    • Telecomm­unications
  • Lifestyle & Health
    • Consumer Products & Retail
    • Entertain­ment & Media
    • Health
    • Sports
    • Travel
  • Policy & Public Interest
  • People & Culture
    • People & Culture
  • Send a Release
  • Sign Up
  • Log In
  • Resources
  • Blog
  • Journalists
  • RSS
  • GDPR
  • Overview
  • Distribution by PR Newswire
  • Cision Communications Cloud®
  • Cision IR
  • All Products
  • Send a Release
  • Sign Up
  • Log In
  • Resources
  • Blog
  • Journalists
  • RSS
  • GDPR
  • General Inquiries
  • Request a Demo
  • Editorial Bureaus
  • Partnerships
  • Media Inquiries
  • Worldwide Offices
  • Send a Release
  • Sign Up
  • Log In
  • Resources
  • Blog
  • Journalists
  • RSS
  • GDPR

New Materials for Future Green Tech Devices

Comprehensive analysis in the journal "APL Materials" provides blueprint for making thermoelectric materials that convert heat and electricity with greater efficiency


News provided by

APL Materials

Jul 15, 2014, 06:07 ET

Share this article

Share this article


WASHINGTON, July 15, 2014 /PRNewswire-USNewswire/ -- From your hot car to your warm laptop, every machine and device in your life wastes a lot of energy through the loss of heat. But thermoelectric devices, which convert heat to electricity and vice versa, can harness that wasted heat, and possibly provide the green tech energy efficiency that's needed for a sustainable future.

Now, a new study shows how porous substances can act as thermoelectric materials—pointing the way for engineering the use of such materials in thermoelectric devices of the future.

About 70 percent of all the energy generated in the world is wasted as heat, said Dimitris Niarchos of the National Center for Scientific Research Demokritos in Athens, Greece. He and Roland Tarkhanyan, also of NCSR Demokritos, have published their analysis in the journal APL Materials, from AIP Publishing.

To create the technology needed to capture this heat, researchers around the world have been trying to engineer more efficient thermoelectric materials. One promising material is one that's filled with tiny holes that range in size from about a micron (10-6 meters) to about a nanometer (10-9 meters). "Porous thermoelectrics can play a significant role in improving thermoelectrics as a viable alternative for harvesting wasted heat," Niarchos said.

Heat travels through a material via phonons, quantized units of vibration that act as heat-carrying particles. When a phonon runs into a hole, it scatters and loses energy. Phonons thus can't carry heat across a porous material as efficiently, giving the material a low thermal conductivity, which turns out to increase the efficiency of heat-to-electricity conversion. The more porous the material, the lower the thermal conductivity, and the better it is as a thermoelectric material.

So far, however, researchers have yet to systematically model how porous materials maintain low thermal conductivity, Niarchos said. So he and Tarkhanyan studied the thermal properties of four simple model structures of micro-nano porous materials. This analysis, Niarchos says, provides a rough blueprint for how to design such materials for thermoelectric devices.

Overall, the researchers found that the smaller the pores and the closer they're packed together, the lower the thermal conductivity. Their calculations match data from other experiments well, Niarchos said. They also show that, in principle, micro-nano porous materials can be several times better at converting heat to electricity than if the material had no pores.

The first model describes a material filled with holes of random sizes, ranging from microns to nanometers in diameter. The second is one with multiple layers in which each layer contains pores of different size scales, which gives it a different porosity. The third is a material that's composed of a three-dimensional cubic lattice of identical holes. The fourth is another multilayered system. But in this case, each layer contains a cubic lattice of identical holes. The size of the holes is different in each layer.

According to the analysis, the first and fourth models have lower thermal conductivities than the second. The third model seems to be the best one, as it also has a lower thermal conductivity than the fourth model.

Except for the first model, however, all the models aren't practical because they represent idealized situations with a perfect arrangement of pores, Niarchos said. It's also practically impossible to create precisely equal-sized pores. The first model is thus the most realistic.

Still, he said, all the distinct models demonstrate the importance of porosity in thermoelectric materials. Built upon simple and general analytical formulas, the models allow for a very fast and accurate computation of the effective lattice thermal conductivity of a porous material and the systematic analysis of such materials.

The article, "Reduction of thermal conductivity in porous 'gray' materials," is authored by Roland H. Tarkhanyan and Dimitris Niarchos. It appears in the journal APL Materials on July 15, 2014. After that date, it can be accessed at: http://scitation.aip.org/content/aip/journal/aplmater/2/7/10.1063/1.4886220

ABOUT THE JOURNAL
APL Materials is a new open access journal featuring original research on significant topical issues within the field of materials science. See: http://aplmaterials.aip.org

Contact:
Jason Socrates Bardi
+1 240-535-4954
[email protected]

SOURCE APL Materials

Modal title

Contact Cision

  • Cision Distribution 888-776-0942
    from 8 AM - 9 PM ET

  • Chat with an Expert
  • General Inquiries
  • Request a Demo
  • Editorial Bureaus
  • Partnerships
  • Media Inquiries
  • Worldwide Offices

Products

  • Cision Communication Cloud®
  • For Marketers
  • For Public Relations
  • For IR & Compliance
  • For Agency
  • For Small Business
  • All Products

About

  • About PR Newswire
  • About Cision
  • Become a Publishing Partner
  • Become a Channel Partner
  • Careers
  • COVID-19 Resources
  • Accessibility Statement
  • Asia
  • Brazil
  • Canada
  • Czech
  • Denmark
  • Finland
  • France
  • Germany
  • India
  • Israel
  • Italy
  • Mexico
  • Middle East
  • Netherlands
  • Norway
  • Poland
  • Portugal
  • Russia
  • Slovakia
  • Spain
  • Sweden
  • United Kingdom

My Services

  • All New Releases
  • Online Member Center
  • ProfNet

Contact Cision

Products

About

My Services
  • All News Releases
  • Online Member Center
  • ProfNet
Cision Distribution Helpline
888-776-0942
  • Terms of Use
  • Privacy Policy
  • Information Security Policy
  • Site Map
  • RSS
  • Cookie Settings
Copyright © 2022 Cision US Inc.