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Updated: Jan 22, 2026

Cryo-electron Microscopy Specimen Preparation By Means Of a Focused Ion Beam
Published on: July 26, 2014
Focused Electron Beam-Induced Deposition and Post-Growth Purification Using the Heteroleptic Ru Complex
Jakub Jurczyk1,2, Christopher R Brewer3, Olivia M Hawkins3
1Laboratory for Mechanics of Materials and Nanostructures , Empa-Swiss Federal Laboratories for Materials Science and Technology , Feuerwerkerstrasse 39 , CH-3602 Thun , Switzerland.
Abstract:
Focused electron beam-induced deposition using the heteroleptic complex (η3-C3H5)Ru(CO)3Br as a precursor resulted in deposition of material with Ru content of 23 at. %. Transmission electron microscopy images indicated a nanogranular structure of pure Ru nanocrystals, embedded into a matrix containing carbon, oxygen, and bromine. The deposits were purified by annealing in a reactive 98% N2/2% H2 atmosphere at 300 °C, resulting in a reduction of contaminants and an increase of the Ru content to 83 at. %. Although a significant volume loss of 79% was found, the shrinkage was observed mostly for vertical thickness (around 75%). The lateral dimensions decreased much less significantly (around 9%). Deposition results, in conjunction with previous gas-phase and condensed-phase surface studies on the electron-induced reactions of (η3-C3H5)Ru(CO)3Br, provide insights into the behavior of allyl, carbonyl, and bromide ligands under identical electron beam irradiation.
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