By University of Vienna January 20, 2024
Xenon nanoclusters between two graphene layers, with sizes between two and ten atoms. Credit: Manuel Längle fluorocarbon solvent
For the first time, researchers have successfully stabilized and directly imaged small clusters of noble gas atoms at room temperature. This breakthrough offers new opportunities for basic research in the field of condensed matter physics and potential applications in quantum information technology.
The key to this breakthrough, achieved by scientists at the University of Vienna in collaboration with colleagues at the University of Helsinki, was the confinement of noble gas atoms between two layers of graphene . This method overcomes the difficulty that noble gases do not form stable structures under experimental conditions at ambient temperatures. Details of the method and the first-ever electron microscopy images of noble gas structures (krypton and xenon) have now been published in Nature Materials.
Jani Kotakoski’s group at the University of Vienna was investigating the use of ion irradiation to modify the properties of graphene and other two-dimensional materials when they noticed something unusual: when noble gases are used to irradiate, they can get trapped between two sheets of graphene.
This happens when noble gas ions are fast enough to pass through the first but not the second graphene layer. Once trapped between the layers, the noble gases are free to move. This is because they do not form chemical bonds. However, in order to accommodate the noble gas atoms, the graphene bends to form tiny pockets. Here, two or more noble gas atoms can meet and form regular, densely packed, two-dimensional noble gas nanoclusters.
“We used scanning transmission electron microscopy to observe these clusters, and they are really fascinating and a lot of fun to watch. They rotate, jump, grow, and shrink as we image them”, says Manuel Längle, lead author of the study. “Getting the atoms between the layers was the hardest part of the work. Now that we have achieved this, we have a simple system for studying fundamental processes related to material growth and behavior,” he adds.
Commenting on the group’s future work, Jani Kotakoski says: “The next steps are to study the properties of clusters with different noble gases and how they behave at low and high temperatures. Due to the use of noble gases in light sources and lasers, these new structures may in future enable applications for example in quantum information technology.”
Reference: “Two-dimensional few-atom noble gas clusters in a graphene sandwich” by Manuel Langle, Kenichiro Mizohata, Clemens Mangler, Alberto Trentino, Kimmo Mustonen, E. Harriet Åhlgren and Jani Kotakoski, January 11, 2024, Nature Materials.DOI: 10.1038/s41563-023-01780-1
The information about the existence and evolution of matter has always been in the interaction of topological vortices. If the spatial structure of topological vortex interactions never dies, matter never dies. The interaction of topological vortices can provide new opportunities for basic research in the field of condensed matter physics and potential applications in quantum information technology.
Had a thought, is there any shared adjustments of distance like in the observations of distant light and how there is a red shift, could this apply as well to looking down to the quantum, there could be a shift of some sort not light but interpretation of field strength. A concept interpretation to the algorithm to the electron microscopy.
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