A team of Scientists from Jamia Millia Islamia have developed a Quantum Thermometer using graphene quantum dots. It is ultra sensitive and can measure temperatures precisely over a wide range – 27° C to –196°C.
- The Ultrasensitive Quantum Thermometer developed by Saikh S. Islam and his team is very sensitive to even minute (MicroKelvin) changes in temperatures.
- It has an extremely quick response time.
- In about 300 milliseconds it has registered temperature change from 27° C to –196°
- And to return to its original temperature it took just 800 milliseconds.
- The team has tested the thermometer for 50-cycles in the one-year time period. It has high repeatability with an ultra-fast response.
- The thermometer can also be used to read high temperatures up to 100°C.
Making of the Thermometer :
- For the thermometer, the scientists have used reduced graphene oxide which has properties similar to monolayer graphene but can be synthesized easily in large-scale materials.
- Quantum dots are formed during the reduction process which is then mixed with a ceramic to produce the sensor.
- The ceramic does not interfere with the quantum dots (3nm to 6nm) but forms a rigid structure around it.
- The quantum dots form a matrix which acts senses the temperature.
- As per scientists, the process of manufacturing the thermometer is extremely cost-effective.
- The team is now looking to use the thermometer in electronic devices as it does not require calibration.
- The device can be used in cryogenic temperature testing applications.
- In Pharmaceutical manufacturing and storage, where accurate temperature maintenance is critical.
- In the healthcare sector where storing biological cells need accurate temperature.
- In the automobile industry for measuring ignition temperature.
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- Graphene is known as the wonder material.
- It consists of a single layer carbon with a hexagonal lattice.
- It is the strongest materials ever tested.
- It conducts heat and electricity effectively.
- It is nearly transparent.
- It has a melting point of 6000K.
- All these properties make it the wonder material which has applications in wide areas.