Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM

Schematic illustration of the cathodoluminescence (CL) nanothermometry. 

CREDIT
UNIST
Schematic illustration of the cathodoluminescence (CL) nanothermometry. CREDIT UNIST

Abstract:
A groundbreaking method for measuring the temperature of nanometer-sized samples within a transmission electron microscope (TEM) has been developed by Professor Oh-Hoon Kwon and his research team in the Department of Chemistry at UNIST. This innovative technology, utilizing nano-thermometers based on cathodoluminescence (CL) spectroscopy, opens up new possibilities for analyzing the thermodynamic properties of fine samples and advancing the development of high-tech materials.

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM

Ulsan, South Korea | Posted on March 8th, 2024

The transmission electron microscope allows researchers to observe samples at a magnification of hundreds of thousands of times by transmitting a short-wavelength electron beam through the sample. By detecting light emitted from the sample through cathode ray emission spectroscopy, researchers can finely analyze the physical and optical properties of the sample at nanometer scales.

The newly developed nano-thermometers rely on the temperature-dependent intensity variation of a specific cathode ray emission band of europium ions (Eu3+). By synthesizing nanoparticles doped with europium ions within gadolinium oxide (Gd2O3), the research team ensured minimal damage from the electron beam, enabling long-term experiments.

Through dynamic analysis, the team confirmed that the intensity ratio of the light emitting band from europium ions is a reliable indicator of temperature, with an impressive measurement error of about 4℃ using nano thermometer particles measuring approximately 100 nanometers in size. This method offers more than twice the accuracy of conventional TEM temperature measurement techniques and significantly improves spatial resolution.

Furthermore, the team demonstrated the applicability of the nano-thermometers by inducing temperature changes with a laser within the TEM and simultaneously measuring temperature and structural variations in real-time. This capability allows for the analysis of thermodynamic properties at the nanometer level in response to external stimuli, without interfering with standard TEM analysis procedures.

Won-Woo Park, the first author of the study, emphasized the non-invasive nature of the temperature measurement process, highlighting that the interaction between the transmission electron beam and the nano-thermometer particles enables real-time temperature detection without disrupting TEM imaging. He noted, “The big advantage of the developed nanometer is that the temperature measurement process does not interfere with the existing transmission electron microscope analysis,” adding, “Since temperature is measured using light, a by-product generated by the interaction between the transmission electron beam and the nanometer particle, it is possible to measure the image of the transmission electron microscope and detect the temperature in real time.”

Professor Kwon underscored the significance of this research, stating that “The developed temperature measurement indicators, when combined with real-time imaging techniques, facilitate the observation of local temperature changes in response to external stimuli.” He further stated, “This advancement is poised to significantly contribute to the development of high-tech materials such as secondary batteries and displays.”

The findings of this research have been published in the online version of ACS Nano on January 30, 2024. This research was made possible with the support of the Samsung Science and Technology Foundation.

####

For more information, please click here

Contacts:
JooHyeon Heo
Ulsan National Institute of Science and Technology(UNIST)

Office: +82-52-217-1223

Copyright © Ulsan National Institute of Science and Technology(UNIST)

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Journal Reference

Related News Press

News and information

New organic molecule shatters phosphorescence efficiency records and paves way for rare metal-free applications July 5th, 2024

Single atoms show their true color July 5th, 2024

New method cracked for high-capacity, secure quantum communication July 5th, 2024

Searching for dark matter with the coldest quantum detectors in the world July 5th, 2024

Imaging

Single atoms show their true color July 5th, 2024

Atomic force microscopy in 3D July 5th, 2024

Physics

New method cracked for high-capacity, secure quantum communication July 5th, 2024

Chemistry

What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024

Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting March 8th, 2024

Discovery of new Li ion conductor unlocks new direction for sustainable batteries: University of Liverpool researchers have discovered a new solid material that rapidly conducts lithium ions February 16th, 2024

Focused ion beam technology: A single tool for a wide range of applications January 12th, 2024

Possible Futures

A 2D device for quantum cooling:EPFL engineers have created a device that can efficiently convert heat into electrical voltage at temperatures lower than that of outer space. The innovation could help overcome a significant obstacle to the advancement of quantum computing technol July 5th, 2024

New method cracked for high-capacity, secure quantum communication July 5th, 2024

Searching for dark matter with the coldest quantum detectors in the world July 5th, 2024

Atomic force microscopy in 3D July 5th, 2024

Discoveries

Efficient and stable hybrid perovskite-organic light-emitting diodes with external quantum efficiency exceeding 40 per cent July 5th, 2024

A New Blue: Mysterious origin of the ribbontail ray’s electric blue spots revealed July 5th, 2024

New organic molecule shatters phosphorescence efficiency records and paves way for rare metal-free applications July 5th, 2024

Single atoms show their true color July 5th, 2024

Materials/Metamaterials/Magnetoresistance

How surface roughness influences the adhesion of soft materials: Research team discovers universal mechanism that leads to adhesion hysteresis in soft materials March 8th, 2024

Focused ion beam technology: A single tool for a wide range of applications January 12th, 2024

Catalytic combo converts CO2 to solid carbon nanofibers: Tandem electrocatalytic-thermocatalytic conversion could help offset emissions of potent greenhouse gas by locking carbon away in a useful material January 12th, 2024

Finding the most heat-resistant substances ever made: UVA Engineering secures DOD MURI award to advance high-temperature materials December 8th, 2023

Announcements

New organic molecule shatters phosphorescence efficiency records and paves way for rare metal-free applications July 5th, 2024

Single atoms show their true color July 5th, 2024

New method cracked for high-capacity, secure quantum communication July 5th, 2024

Searching for dark matter with the coldest quantum detectors in the world July 5th, 2024

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Single atoms show their true color July 5th, 2024

New method cracked for high-capacity, secure quantum communication July 5th, 2024

Searching for dark matter with the coldest quantum detectors in the world July 5th, 2024

Atomic force microscopy in 3D July 5th, 2024

Photonics/Optics/Lasers

Single atoms show their true color July 5th, 2024

New method cracked for high-capacity, secure quantum communication July 5th, 2024

Aston University researcher receives £1 million grant to revolutionize miniature optical devices May 17th, 2024

With VECSELs towards the quantum internet Fraunhofer: IAF achieves record output power with VECSEL for quantum frequency converters April 5th, 2024

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project