- Cited by 31
Conrad, H. and Jung, K. 2005. Effect of grain size from mm to nm on the flow stress and plastic deformation kinetics of Au at low homologous temperatures. Materials Science and Engineering: A, Vol. 406, Issue. 1-2, p. 78.
Biener, Juergen Hodge, Andrea M. and Hamza, Alex V. 2005. Microscopic failure behavior of nanoporous gold. Applied Physics Letters, Vol. 87, Issue. 12, p. 121908.
Zielasek, Volkmar Jürgens, Birte Schulz, Christian Biener, Jürgen Biener, Monika M. Hamza, Alex V. and Bäumer, Marcus 2006. Gold Catalysts: Nanoporous Gold Foams. Angewandte Chemie International Edition, Vol. 45, Issue. 48, p. 8241.
Zielasek, Volkmar Jürgens, Birte Schulz, Christian Biener, Jürgen Biener, Monika M. Hamza, Alex V. and Bäumer, Marcus 2006. Goldkatalysatoren: Nanoporöse Gold-Schwämme. Angewandte Chemie, Vol. 118, Issue. 48, p. 8421.
Parida, S. Kramer, D. Volkert, C. A. Rösner, H. Erlebacher, J. and Weissmüller, J. 2006. Volume Change during the Formation of Nanoporous Gold by Dealloying. Physical Review Letters, Vol. 97, Issue. 3,
Hodge, A. M. Hayes, J. R. Caro, J. A. Biener, J. and Hamza, A. V. 2006. Characterization and Mechanical Behavior of Nanoporous Gold. Advanced Engineering Materials, Vol. 8, Issue. 9, p. 853.
Sun, Ye Sun and Balk, T. John 2006. Mechanical Behavior and Microstructure of Nanoporous Gold Films. MRS Proceedings, Vol. 924, Issue. ,
Hakamada, Masataka and Mabuchi, Mamoru 2007. Processing of Nanoporous Gold by Dealloying and its Morphological Control. Materials Science Forum, Vol. 561-565, Issue. , p. 1657.
Renner, F.U. Gründer, Y. Lyman, P.F. and Zegenhagen, J. 2007. In-situ X-ray diffraction study of the initial dealloying of Cu3Au(001) and Cu0.83Pd0.17(001). Thin Solid Films, Vol. 515, Issue. 14, p. 5574.
Hayes, J R Nyce, G W Kuntz, J D Satcher, J H and Hamza, A V 2007. Synthesis of bi-modal nanoporous Cu, CuO and Cu2O monoliths with tailored porosity. Nanotechnology, Vol. 18, Issue. 27, p. 275602.
Rösner, H. Parida, S. Kramer, D. Volkert, C. A. and Weissmüller, J. 2007. Reconstructing a Nanoporous Metal in Three Dimensions: An Electron Tomography Study of Dealloyed Gold Leaf. Advanced Engineering Materials, Vol. 9, Issue. 7, p. 535.
Jürgens, Birte Kübel, Christian Schulz, Christian Nowitzki, Tobias Zielasek, Volkmar Biener, Jürgen Biener, Monika M Hamza, Alex V and Bäumer, Marcus 2007. New gold and silver-gold catalysts in the shape of sponges and sieves. Gold Bulletin, Vol. 40, Issue. 2, p. 142.
Hakamada, Masataka and Mabuchi, Mamoru 2008. Microstructural evolution in nanoporous gold by thermal and acid treatments. Materials Letters, Vol. 62, Issue. 3, p. 483.
Renner, F. U. Stierle, A. Dosch, H. Kolb, D. M. Lee, T. L. and Zegenhagen, J. 2008. In situx-ray diffraction study of the initial dealloying and passivation ofCu3Au(111)during anodic dissolution. Physical Review B, Vol. 77, Issue. 23,
Sun, Ye and Balk, T. John 2008. Evolution of Structure, Composition, and Stress in Nanoporous Gold Thin Films with Grain-Boundary Cracks. Metallurgical and Materials Transactions A, Vol. 39, Issue. 11, p. 2656.
Ding, Yu Sun, Chang Q. and Zhou, Y. C. 2008. Nanocavity strengthening: Impact of the broken bonds at the negatively curved surfaces. Journal of Applied Physics, Vol. 103, Issue. 8, p. 084317.
Sun, Ye Kucera, Kalan P. Burger, Sofie A. and John Balk, T. 2008. Microstructure, stability and thermomechanical behavior of crack-free thin films of nanoporous gold. Scripta Materialia, Vol. 58, Issue. 11, p. 1018.
Erri, Peter Nader, Jose and Varma, Arvind 2008. Controlling Combustion Wave Propagation for Transition Metal/Alloy/Cermet Foam Synthesis. Advanced Materials, Vol. 20, Issue. 7, p. 1243.
Klajn, Rafal Gray, Timothy P. Wesson, Paul J. Myers, Benjamin D. Dravid, Vinayak P. Smoukov, Stoyan K. and Grzybowski, Bartosz A. 2008. Bulk Synthesis and Surface Patterning of Nanoporous Metals and Alloys from Supraspherical Nanoparticle Aggregates. Advanced Functional Materials, Vol. 18, Issue. 18, p. 2763.
Sun, Chang Q. 2009. Thermo-mechanical behavior of low-dimensional systems: The local bond average approach. Progress in Materials Science, Vol. 54, Issue. 2, p. 179.
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We describe a two-step dealloying/compaction process to produce nanocrystalline Au. First, nanocrystalline/nanoporous Au foam was synthesized by electrochemically driven dealloying. The resulting Au foams exhibited porosities of ∼60% with pore sizes of 40 and 100 nm and a typical grain size of <50 nm. Second, the nanoporous foams were fully compacted to produce nanocrystalline monolithic Au. The compacted Au was characterized by transmission electron microscopy and x-ray diffraction and tested by depth-sensing nanoindentation. The compacted nanocrystalline Au exhibited an average grain size of <50 nm and hardness values ranging from 1.4 to 2.0 GPa, which were up to 4.5 times higher than the hardness values obtained from polycrystalline Au.
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- ISSN: 0884-2914
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