Formation and evolution of nanoporous dendrites during dealloying of a ternary Al-Ag-Au precursor
CrystEngComm, ISSN: 1466-8033, Vol: 16, Issue: 3, Page: 479-485
2014
- 11Citations
- 7Captures
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Article Description
Formation and evolution of nanoporous dendrites during dealloying of a ternary Al-Ag-Au precursor have been investigated using X-ray diffraction, scanning electron microscopy and energy dispersive X-ray analysis. The rapidly solidified Al65Ag22.75Au12.25 precursor is composed of equiaxed Al2(Au,Ag) dendrites which uniformly distribute in a lamellar α-Al-Ag2Al eutectic matrix. The kind of solution has a significant influence on the dealloying of Al65Ag 22.75Au12.25. The dealloying of α-Al-Ag 2Al eutectic in the HCl solution leads to the formation of nanoporous Ag (np-Ag), but the Al2(Au,Ag) phase cannot be dealloyed. Nanoporous AgAu (np-AgAu) alloys with bimodal channel size distributions can be fabricated through a two-step dealloying of Al65Ag22.75Au 12.25. The further dealloying of np-AgAu in a concentrated HNO 3 solution results in the formation of nanoporous Au (np-Au). Moreover, the dendrite morphology can be retained in the as-dealloyed samples during the multi-step dealloying. Through the dealloying strategy, we can fabricate novel np-AgAu and np-Au ribbons composed of nanoporous dendrites. © The Royal Society of Chemistry.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84890349711&origin=inward; http://dx.doi.org/10.1039/c3ce40843d; http://xlink.rsc.org/?DOI=C3CE40843D; http://pubs.rsc.org/en/content/articlepdf/2014/CE/C3CE40843D; https://xlink.rsc.org/?DOI=C3CE40843D; https://dx.doi.org/10.1039/c3ce40843d; https://pubs.rsc.org/en/content/articlelanding/2014/ce/c3ce40843d
Royal Society of Chemistry (RSC)
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