EPJ D Highlight - Better understanding the bonds between carbon group elements

Experimental setup

Heating clusters of these elements reveals key differences

The bonds between clusters of elements in the fourteenth group of the periodic table are known to be fickle. Ranging from the nonmetal carbon, to the metalloids silicon and germanium, to the metals tin and lead, all these elements share the same configuration of valence electrons – electrons in their atoms’ outermost energy level. However, clusters formed from these elements respond differently to being excited with laser pulses. Studying the response of atomic clusters to photoexcitation as a function of the element they are composed of and their number of atoms reveals patterns that can be used to gain insight into their structure and binding mechanisms.

In a new paper in EPJ D: Atomic, Molecular, Optical and Plasma Physics, Paul Fischer and colleagues from the University of Greifswald in Germany reveal that, generally, the atomic bonds of carbon group clusters change from covalent to metallic when moving down the group. To determine this, the researchers irradiated a solid target in vacuum using a pulsed laser, producing neutral and charged gas-phase atoms and clusters. Storing the charged particles in an electrostatic ion trap composed of two opposing ion-optical mirrors made it possible to separate them according to their mass-to-charge ratio with high resolution. The researchers then used a second pulsed laser to excite selected chemical species, revealing how the bonds across the group differ.

Applying this approach to more complex chemical species, such as doped or compound clusters, could lead to further insight into even more advanced binding mechanisms.

Because of its success in revealing subtle properties of cluster bonds in the well-studied carbon group, the authors conclude their method has the potential to unlock hidden properties of lesser-studied clusters.

This was our first experience of publishing with EPJ Web of Conferences. We contacted the publisher in the middle of September, just one month prior to the Conference, but everything went through smoothly. We have had published MNPS Proceedings with different publishers in the past, and would like to tell that the EPJ Web of Conferences team was probably the best, very quick, helpful and interactive. Typically, we were getting responses from EPJ Web of Conferences team within less than an hour and have had help at every production stage.
We are very thankful to Solange Guenot, Web of Conferences Publishing Editor, and Isabelle Houlbert, Web of Conferences Production Editor, for their support. These ladies are top-level professionals, who made a great contribution to the success of this issue. We are fully satisfied with the publication of the Conference Proceedings and are looking forward to further cooperation. The publication was very fast, easy and of high quality. My colleagues and I strongly recommend EPJ Web of Conferences to anyone, who is interested in quick high-quality publication of conference proceedings.

On behalf of the Organizing and Program Committees and Editorial Team of MNPS-2019, Dr. Alexey B. Nadykto, Moscow State Technological University “STANKIN”, Moscow, Russia. EPJ Web of Conferences vol. 224 (2019)

ISSN: 2100-014X (Electronic Edition)

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