• HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
Friday, August 1, 2025
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
No Result
View All Result
Bioengineer.org
No Result
View All Result
Home NEWS Science News Chemistry

Study shows pressure induces unusually high electrical conductivity in polyiodide

Bioengineer by Bioengineer
March 19, 2019
in Chemistry
Reading Time: 2 mins read
0
Share on FacebookShare on TwitterShare on LinkedinShare on RedditShare on Telegram

Work carried out in tetraethylammonium di-iodine triiodide (TEAI)

Polyiodides exhibit useful electrochemical properties such as charge-carrier transportation, high electrolyte energy density, high redox reaction reversibility and a wide range of electrical conductivity, all depending on the forces exerted by the organic counter ions–chemical pressure. For this reason, polyiodides have been used in technical applications in electronic and electrochemical devices such as flow batteries, fuel cells, dye sensitized solar cells and optical devices.

In this study, researchers led by Prof. Piero Macchi, experimental group leader in MARVEL’s Design and Discovery Project 4 and head of the laboratory of chemical crystallography at the Department of Chemistry and Biochemistry of the University of Bern, and Dr. Nicola Casati, group leader of the Materials Science group at PSI, used powder and single-crystal X-ray diffraction, electrical conductivity, and first principle calculations to investigate the response of one polyiodide, tetraethylammonium di-iodine triiodide (TEAI), to compression achieved by mechanical pressure.

Compared with the chemical pressure, external mechanical pressure affects the crystal inter- and intramolecular landscape more substantially–a huge lattice strain may induce phase transformations and even chemical reactions. Using diamond anvil cells, it is possible to achieve pressure on the order of tens of gigapascals, a pressure that significantly changes the Gibbs energy, increasing internal energy. Similarly large energy changes are not possible through temperature alteration in solids.

Though complementary I3- and I2 units are clearly separated and interact mainly electrostatically at ambient pressure, the researchers found that compression stimulates their approach–theoretical calculations show that the covalent contribution increases when the material is compressed. Ultimately, this leads to the formation of CT chains, and drastically increased conductivity.

These features make TEAI a tunable pressure-sensitive electric switch. Structural studies at high pressure can rationalize the synthesis and search for future organic and hybrid semiconductors based on PI. The study results indicate that solid PI may be used as solid electrolytes in dye-sensitized solar cells, eliminating the need for organic-based gelators and ionic liquids in general.

###

The paper was funded in part by NCCR MARVEL.

Media Contact
Piero Macchi
[email protected]

Related Journal Article

http://nccr-marvel.ch/highlights/2019-03polyiodide
http://dx.doi.org/10.1002/anie.201901178

Tags: Chemistry/Physics/Materials SciencesMaterialsPolymer ChemistrySuperconductors/Semiconductors
Share13Tweet8Share2ShareShareShare2

Related Posts

Advanced ANF/MXene-Enhanced Hydrogels Pave the Way for Flexible EMI Shielding and Wearable Sensors

Advanced ANF/MXene-Enhanced Hydrogels Pave the Way for Flexible EMI Shielding and Wearable Sensors

August 1, 2025
blank

Nanodevice Harnesses Sound Waves to Shape Light, Revolutionizing Displays and Imaging Technologies

August 1, 2025

Here’s a rewritten version of the headline for a science magazine post: “Could Desert Dust Hold the Key to Freezing Clouds?”

July 31, 2025

Rice Theoretical Physicist Illuminates Rare High-Field Phase in Superconductivity Research

July 31, 2025
Please login to join discussion

POPULAR NEWS

  • Blind to the Burn

    Overlooked Dangers: Debunking Common Myths About Skin Cancer Risk in the U.S.

    60 shares
    Share 24 Tweet 15
  • Dr. Miriam Merad Honored with French Knighthood for Groundbreaking Contributions to Science and Medicine

    46 shares
    Share 18 Tweet 12
  • Study Reveals Beta-HPV Directly Causes Skin Cancer in Immunocompromised Individuals

    37 shares
    Share 15 Tweet 9
  • Sustainability Accelerator Chooses 41 Promising Projects Poised for Rapid Scale-Up

    35 shares
    Share 14 Tweet 9

About

We bring you the latest biotechnology news from best research centers and universities around the world. Check our website.

Follow us

Recent News

Panobinostat Boosts Adagrasib Killing via Autophagy

Renal GSDME Shields Male Mice from Cisplatin Toxicity

Examining Large-Scale Gene Variants in Parkinson’s

  • Contact Us

Bioengineer.org © Copyright 2023 All Rights Reserved.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • National
  • Business
  • Health
  • Lifestyle
  • Science

Bioengineer.org © Copyright 2023 All Rights Reserved.