Researchers at Chalmers University in Sweden can use a new microscopy technique to look at individual nanoparticles instead of looking at a bunch of particles that get together. Results published in the journal Nature Journal show researchers using plasmonic nanospectroscopy to visualize a single palladium nanoparticle.
Project leader Christopher Longheimer said: "We can demonstrate that by looking at a single nanoparticle we can see the physical properties of the interaction between the nanomaterial and the surrounding molecules."
According to the 11th official website of the Institute of Electrical and Electronics Engineers (IEEE) Spectrum, researchers used this technique to test the ability of individual palladium nanoparticles to absorb hydrogen. Experiments showed that although the nanoparticles had the same size and shape, The degree of hydrogen uptake is not the same for barometric pressure (barometric pressure units, 1 mbar = 100 Pascal) at atmospheric pressure.
In real world applications, this observation can help develop more sensitive hydrogen sensors to detect leaks in fuel cell vehicles. Longheimer said: "One of the major challenges when it comes to hydrogen sensors is the ability to design materials that are linear and reversible for hydrogen feedback."
Previously, there were already people who were able to image individual nanoparticles, but this required a higher cost to heat the nanoparticles or to otherwise eliminate the problems that affect the accuracy of the observations.
Longheimer said: "When studying individual nanoparticles, you need to have a special detector ask the particle 'What are you doing'? This usually means focusing on a bunch of high-energy electrons in a very subtle range, Or photons, and you can quickly get a very high energy density, but it can destroy some of the processes you want to see.
The new approach not only minimizes this damaging effect, but also coordinates well with the environment, allowing only one nanoparticle to be studied at a time in the real world. This ability to visualize nanoparticles outside of the lab may make "the impact of nanoparticles in the environment" a major development in this area.
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