Copper mirrors direct and focus microwave photons in electrons on liquid helium system. The focusing mirror (on the left) is made by pressing a hard stainless steel ball (also shown in the picture) into a soft piece of copper. The flat mirror (on the right) shows two concentric circular electrodes (aka a Corbino pair) that are used to measure electron conductivity.
(Picture: Olga Garnova / CC BY-SA 2.0)
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![Dr. E. Poonguzhali has successfully transferred commercially available starting materials to medicinally important 2-acylbenzo[b]thiophenes in the presence of copper acetate & tetrabutylammonium chloride catalytic system.](https://cdn1.vogel.de/ZK7wqjVy7Ps1OSwUs5tXgrNZGEE=/288x162/smart/filters:format(jpg):quality(80)/images.vogel.de/vogelonline/bdb/1964500/1964559/original.jpg "Dr. E. Poonguzhali has successfully transferred commercially available starting materials to medicinally important 2-acylbenzo[b]thiophenes in the presence of copper acetate & tetrabutylammonium chloride catalytic system.")
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/cdn4.vogel.de/infinity/white.jpg "Copper mirrors direct and focus microwave photons in electrons on liquid helium system. The focusing mirror (on the left) is made by pressing a hard stainless steel ball (also shown in the picture) into a soft piece of copper. The flat mirror (on the right) shows two concentric circular electrodes (aka a Corbino pair) that are used to measure electron conductivity.")
