Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > A micro-thermometer to record tiny temperature changes

(a) Video still showing a tightly focused laser beam making contact with the thermocouple. (b) Graph showing the thermocouple's response over time to different laser powers (3.6 and 1.8 mW) at different repetition rates, on glass and on the silicon nitride membrane (ΔT: change in temperature, τ: time for temperature rise and decay).
CREDIT
Scientific Reports
(a) Video still showing a tightly focused laser beam making contact with the thermocouple. (b) Graph showing the thermocouple's response over time to different laser powers (3.6 and 1.8 mW) at different repetition rates, on glass and on the silicon nitride membrane (ΔT: change in temperature, τ: time for temperature rise and decay). CREDIT Scientific Reports

Abstract:
Scientists at Tokyo Institute of Technology (Tokyo Tech) and their collaborators have developed a micrometer-wide thermometer that is sensitive to heat generated by optical and electron beams, and can measure small and rapid temperature changes in real time. This new device can be used to explore heat transport on the micro- and nano-scales, and in optical microscopy and synchrotron radiation experiments.

A micro-thermometer to record tiny temperature changes

Tokyo, Japan | Posted on May 15th, 2018

There is an urgent need for a device that can measure thermal behavior on the nanoscale and in real time, as this technology could be applied in photo-thermal cancer treatment as well as in advanced research on crystals, optical light harvesting, etc. Moreover, a miniaturized thermal microscopy system with a nanoscale heat source and detector is essential for future development of next-generation transistors that will be employed in designing new nanoscale devices.

A thermocouple is an electrical device consisting of two dissimilar electrical conductors forming electrical junctions at differing temperatures. A thermocouple produces a temperature-dependent voltage, which can be interpreted to measure temperature. The micro-thermocouple recently developed by scientists at Tokyo Institute of Technology and their collaborators is of major importance to researchers in many fields. This device consists of a gold and nickel thermocouple on a silicon nitride membrane and is miniaturized to the extent that the electrodes are only 2.5 μm wide and the membrane is just 30 nm thick. For such a system to be used as a thermal characterization device, i.e., a thermometer, it must show sensitivity to temperature change. The developed micro-thermocouple exhibited high responsiveness to heat generated by a laser and an electron beam. Importantly, tiny temperature changes were measured by the developed thermocouple for both types of heating.

An already developed miniaturization process was used to prepare the micro-thermocouple, but critical improvements were made. In the established method, a cross pattern of metal stripes with widths of a few micrometers is created, so that a thermocouple is produced. The researchers at Tokyo Institute of Technology and their colleagues used this technique to create a pattern on a nano-thin silicon nitride membrane, which enhanced the device sensitivity and enabled it to respond faster. Through this approach, a thermometer that could measure fast and small temperature changes was successfully produced, with the measurements being performed through the nano-thin silicon nitride membrane.

As explained above, both a nanoscale heat source and a nanoscale detector are needed for a miniaturized thermal microscopy system. These requirements were successfully satisfied by the researchers, who used the nano-thin membrane and a tightly focused laser or electron beam to create a heat source with a diameter of less than 1 μm. So, combined with the micro-thermocouple detector, a nanoscale thermal microscopy system was achieved. This system can be regarded as a new "toolbox" for investigating heat transport behavior on the micro- and nano-scales, with many important applications in a wide range of fields.

####

For more information, please click here

Contacts:
Emiko Kawaguchi

81-357-342-975

Copyright © Tokyo Institute of Technology

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

RELATED JOURNAL ARTICLE

Related News Press

News and information

Birth of a hybrid: High-temperature synthesis under pressure helps to combine properties of metals and ceramics December 15th, 2018

The role of lipid nanoparticles and its surface modification in reaching the brain: This article by Dr. Manoli Igartua et al. is published in Current Drug Delivery, Volume 15, Issue 9, 2018 December 14th, 2018

Researchers use jiggly Jell-O to make powerful new hydrogen fuel catalyst: The inexpensive new material can split water just as efficiently as costly platinum December 14th, 2018

IMDEA Nanociencia and Universidad Autónoma de Madrid researchers have demonstrated that graphene deposited on a metal surface promotes an unusual chemical reaction that would hardly take place under noncatalyzed conditions. December 14th, 2018

Chemistry

New catalyst produces cheap hydrogen November 30th, 2018

Nanotech Artisans Sculpt with DNA November 5th, 2018

Iran World’s Second Largest Producer of Nano-Catalysts October 17th, 2018

Big award enables study of small surfaces: Rice U.'s Matt Jones wins Packard Fellowship to view nanoscale chemical reactions October 15th, 2018

Discoveries

Birth of a hybrid: High-temperature synthesis under pressure helps to combine properties of metals and ceramics December 15th, 2018

A summary of electrospun nanofibers as drug delivery system: This article by Dr. José Manuel Cornejo Bravo et al. is published in Current Drug Delivery, Volume 15 , Issue 10 , 2018 December 14th, 2018

Vitamin E TPGS emulsified vinorelbine bitartrate loaded solid lipid nanoparticles (SLN): This article by Dr. Sanjay Singh et al. is published in Current Drug Delivery, Volume 15 , Issue 8 , 2018 December 14th, 2018

Researchers use jiggly Jell-O to make powerful new hydrogen fuel catalyst: The inexpensive new material can split water just as efficiently as costly platinum December 14th, 2018

Announcements

Birth of a hybrid: High-temperature synthesis under pressure helps to combine properties of metals and ceramics December 15th, 2018

The role of lipid nanoparticles and its surface modification in reaching the brain: This article by Dr. Manoli Igartua et al. is published in Current Drug Delivery, Volume 15, Issue 9, 2018 December 14th, 2018

A summary of electrospun nanofibers as drug delivery system: This article by Dr. José Manuel Cornejo Bravo et al. is published in Current Drug Delivery, Volume 15 , Issue 10 , 2018 December 14th, 2018

Vitamin E TPGS emulsified vinorelbine bitartrate loaded solid lipid nanoparticles (SLN): This article by Dr. Sanjay Singh et al. is published in Current Drug Delivery, Volume 15 , Issue 8 , 2018 December 14th, 2018

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

Birth of a hybrid: High-temperature synthesis under pressure helps to combine properties of metals and ceramics December 15th, 2018

The role of lipid nanoparticles and its surface modification in reaching the brain: This article by Dr. Manoli Igartua et al. is published in Current Drug Delivery, Volume 15, Issue 9, 2018 December 14th, 2018

Researchers use jiggly Jell-O to make powerful new hydrogen fuel catalyst: The inexpensive new material can split water just as efficiently as costly platinum December 14th, 2018

IMDEA Nanociencia and Universidad Autónoma de Madrid researchers have demonstrated that graphene deposited on a metal surface promotes an unusual chemical reaction that would hardly take place under noncatalyzed conditions. December 14th, 2018

Tools

Elliot Scientific now representing Raman Imaging specialists WITec in the UK and Eire - Unique correlative analysis in one instrument: Raman/AFM, Raman/SNOM December 10th, 2018

Milestone for bERLinPro: Photocathodes with high quantum efficiency December 8th, 2018

Spectradyne Partners with Particle Technology Labs for Measurement Services December 6th, 2018

Nanoscribe Presents Successor Model Photonic Professional GT2 for High-Resolution 3D Microfabrication: The first ever production of structures in millimeter size with micrometer precision December 4th, 2018

Photonics/Optics/Lasers

Nanoscribe Presents Successor Model Photonic Professional GT2 for High-Resolution 3D Microfabrication: The first ever production of structures in millimeter size with micrometer precision December 4th, 2018

CEA-Leti Extends 300mm Line and Adds Avenues for Developing Disruptive Technologies: Execution Relies on CEA-Leti’s Fully Implemented Technology With Module-Level Innovations & Devices and Their Architectures December 3rd, 2018

Bending light around tight corners without backscattering losses: New photonic crystal waveguide based on topological insulators paves the way to build futuristic light-based computers November 19th, 2018

GaN Rising: UC Santa Barbara electrical and computer engineering professor Umesh Mishra to deliver 63rd Annual Faculty Research Lecture November 16th, 2018

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