Bead single crystal electrodes (Clavilier-type)
The hemispherical crystals have a polished surface plane oriented in a desired crystallographic direction. Due to the new patented manufacturing process using electron beam heating in vacuum we can offer bead crystals from a large variety of materials such as: Cu, Mo, Rh, Pd, Ag, Ta, W, Re, Ir, Pt, Au, PtPd, PtRh, AuAg, and PtIr. The preparation by electron beam heating prevents also the formation of gas bubbles in the crystals which occur often when using the standard flame annealing method.
Movie of a growing Au bead crystal
The crystal is heated by an electron beam during solidification. The upper crystallized part of the bead is darker than the hot liquid part in the lower part of the image. The (111) facets formed on the solidified part of the bead are visible.
Au bead crystal from icryst on the cover of Nature Chemistry
The cover image shows a gold electrode from icryst used by Rodriguez, Kwon and Koper in their study of gold-catalysed alcohol oxidation. The electrode is in the 'hanging-meniscus configuration' and is immersed in an aqueous solution.
(link to the article in Nature Chemistry published by Nature Publishing Group)
Etched silver bead single crystal. The white triangle in the center corresponds to the (111) orientation. Three (100) orientations can be seen at the outer rim of the crystal. A schematic of the facets is shown in the right image.
We offer bead crystals according to your specific demands. Please do not hesitate to discuss your requests with us. Any inquiry can be sent to: firstname.lastname@example.org