Skip Ribbon Commands Skip to main content

 Global - Sci - Tech - News - Content

​Nano-thermometers created using diamond particles and quantum light Update: 15-05-2019
Nanothermometers, while not a brand new idea, are still at the cutting edge of science. We've seen impressive results to date, but accuracy and resolution can always improve, and this is what researchers from the University of Technology Sydney (UTS) in Australia believe they've achieved.


Matt Kennedy

21 hours ago


Illustration of nanoscale diamonds probing temperature of electronic circuits (Credit: Dr. Trong Toan Tran)


The potential applications for nanothermometry are incredibly broad. From diseased cells to micro/nano components in computer and communications technology; being able to accurately measure temperature (and monitor fluctuations) at the nano scale is a game changer. The team, led by Senior Investigator Dr. Carlo Bradac at the UTS School of Mathematical and Physical Sciences, has taken a novel approach to nanothermometry, using flaws in diamond nanoparticles as thermal sensors on the quantum level.

While pure diamond is regarded as transparent, imperfections at the atomic level are often present, and it's these foreign atoms, with their respective color impurities, that the technique is built around. These diamond nanoparticles are extremely small – up to 10,000 times smaller than the width of a human hair – and when the imperfections in them are illuminated with a laser, they fluoresce. It's this very fluorescence which the system employs to measure temperature.

The researchers used a regime known as Anti-Stokes, in which the intensity of the light emitted by the impurities in the diamond nanoparticles depends strongly upon temperature of their surroundings. The colored impurities within the diamonds are illuminated by a low energy light source, and as temperature increases, the particles' color centers become excited, thereby increasing the luminosity exponentially. This provides an incredibly accurate method for sensing the temperature. All that's required is that diamond nanoparticles in a water solution are placed in contact with the sample, and their optical fluorescence is then measured.

While similar optical nanothermometer systems have been proposed in the past, the sensitivity and spatial resolution of this new method is reported to be what sets it apart. And according to the team, this is no proof-of-concept, it's ready to roll right now.

"The method is immediately deployable," says Dr. Bradac. "We are currently using it for measuring temperature variations both in biological samples and in high-power electronic circuits whose performance strongly rely on monitoring and controlling their temperature with sensitivities and at a scale hard to achieve with other methods."

The study, published in Science Advances, is a collaboration between UTS, the Russian Academy of Science, Nanyang Technological University and Harvard University.

Source: New Atlas URL: of Technology Sydney via Scimex

Posts on:
Select a date from the calendar.

 Video Clip

  • The NA Chairwoman - Nguyen Thi Kim Ngan - hosted a reception in Hanoi on Jan 29 for Mr Tsutomu Takebe, the special advisor to Japan - Vietnam Friendship Parliamentary Alliance, who confirmed his continued contributions to developing 2 countries’ relations
  • The National Assembly Chairwoman Nguyen Thi Kim Ngan has complimented Vietnam’s U23 football team – the runner-up of the Asian Football Confederation U23 Championship (AFC), on their excellent performance and historical achievements at the continental spo
  • Vietnam U23 welcomed home: State PM Phuc welcomed in Hanoi on January 28 U23 Vietnam – the runner - up of the Asian Football Confederation U23 Championship - AFC in China, praising their excellent performance and achievements at the continental tournament
  • U23 Vietnamese football team’s return wows the foreign press: the impressive performances of the red - shirts have left a mark on the international media, as well as on the hearts of millions of football fans not only in Vietnam but all over the region
  • The Asian Football Confederation has an article praising Vietnam’s final game in Changzhou, China; it said the match at the final round wrapped up Vietnam’s memorable journey but it will live forever in the memory of fans in this Southeast Asian country

     Photo Library