Advanced materials from the Science Foundation of Ireland (SFI) and
biology
Scientists at the Engineering Research Center Trinity and AMBER have discovered a new material and high resolution3D printingThe new method of making tiny gas color sensors may help the development of smart homes and health monitoring.
3D printingMicroscopic gas sensor.Middle: display color3D printingPhoto of the glass substrate of the sensor. Left: a magnified optical microscope image showing the response of the pixelated sensor to different vapors; right: a scanning electron microscope image of the pixelated sensor, showing different heights of periodic structures.
The research team published their new research results in “Journal of Materials Chemistry C”, claiming that these printed sensors are sensitive, mainly a microscopic optical structure, which can realize real-time monitoring and detection of a certain gas content in the air. Most people spend most of their time at home, in the car or in the workplace, so cheap and accurate monitoring of pollutant levels has become a general trend and has a huge market. These sensors have huge potential and can be used in connected low-cost home devices or integrated in wearable devices for monitoring human health.
The lead author of the article, Dr. Colm Delaney, said: “More than 300 years ago, Robert Hooke (who used a microscope to observe organisms and invented the word Cell) first studied the bright colors on the wings of a peacock. A few centuries later, scientists did not It was discovered that this “luminous” color is not caused by traditional natural pigments, but by the interaction of light with tiny objects on feathers, which are only a few millionths of a meter in size.”
“We borrowed from this biological design, observed all the way from magpie to chameleon, and used laser direct writing (DLW) technology to make some unique materials. Using this technology we can focus the laser to a very small point, and then use experiments The soft polymer developed by the laboratory creates three-dimensional microstructures.”
Photonics Professor Louise Bradley added: “The research conducted by our two groups focuses on the design, modeling, and manufacturing of tiny structures in stimulus-responsive materials. My PhD student Jing Qian spent a lot of time developing designs and predicting the effects of different structures. Reaction, allowing these structures to react to light, heat and humidity to create a system that can truly reproduce the vividness, invisibility and camouflage in nature. These tiny reaction arrays smaller than freckles can tell us what they are. The chemical composition of the environment.”
Why are miniature color change sensors extremely valuable? Although traditional physical sensors support the interconnection of life, there is still a lag in low-cost, adaptable chemical sensing platforms. Photon sensors have made considerable progress and have become important substitutes due to their minimal power consumption, lower operating costs and higher sensitivity. This is also an important manifestation of the commercialization of the sensor.
Professor Larisa Florea from AMBER said: “We have created a responsive3D printingThe microscopic optical structure can be monitored in real time and used for gas detection.3D printingThis kind of optically responsive material can be used in interconnected, low-cost sensing devices in the home, or in wearable devices for monitoring and analyzing targets. “
“Our experimental model shows that the concentration of indoor pollutants may be 5-100 times the outdoor concentration. Considering that 90% of the world’s population as observed by the World Health Organization lives in such an area with air concentrations far exceeding the acceptable air concentration for humans , Our research has unique value. These pollutants will be affected by the surrounding air, chemicals, aromas, food quality and human activities, and have a profound impact on our health. And so far indoor gas sensors almost Only focus on the detection of leaks, smoke and carbon dioxide. Our goal is to respond accurately and quickly to relative humidity, oxygen levels, carbon dioxide, volatile organic carbons (VOCs) and ammonia.”
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