@misc{qi_porous_gold_2015, 
author={Qi, Z., Vainio, U., Kornowski, A., Ritter, M., Weller, H., Jin, H., Weissmueller, J.},
title={Porous Gold with a Nested-Network Architecture and Ultrafine Structure},
year={2015},
howpublished = {journal article},
doi = {https://doi.org/10.1002/adfm.201404544},
abstract = {A preparation strategy is developed for monolithic samples of nanoporous gold with a hierarchical structure comprising two nested networks of solid “ligaments” on distinctly different structural length scales. The electrochemical dealloying protocol achieves a large retention of less noble element in a first corrosion step, thereby allowing an extra corrosion step which forms a separate structural hierarchy level. The beneficial impact of adding Pt to the Ag–Au master alloys that are more conventionally used in dealloying approaches to nanoporous gold is demonstrated. At ≈6 nm, the lower hierarchy level ligament size emerges extremely small. Furthermore, Pt favors the retention of Ag during the first dealloying step even when the master alloy has a high Au content. The high Au content reduces the corrosion-induced shrinkage, mitigating crack formation during preparation and favoring the formation of high-quality macroscopic (mm-sized) samples. The corrosion effectively carves out the nanoscale hierarchical ligament structure from the parent crystals tens of micrometers in size. This is revealed by X-ray as well as electron backscatter diffraction, which shows that the porous crystallites inherit the highly ordered, macroscopic crystal lattice structure of the master alloy.},
note = {Online available at: \url{https://doi.org/10.1002/adfm.201404544} (DOI). Qi, Z.; Vainio, U.; Kornowski, A.; Ritter, M.; Weller, H.; Jin, H.; Weissmueller, J.: Porous Gold with a Nested-Network Architecture and Ultrafine Structure. Advanced Functional Materials. 2015. vol. 25, no. 17, 2530-2536. DOI: 10.1002/adfm.201404544}}