Abstract
We used x-ray nanotomography to characterize the three-dimensional (3D) morphology and topology of dealloyed nanoporous gold after coarsening. The interface shape distribution obtained from the nanotomography measurement shows that the coarsening does not proceed by bulk diffusion. The surface normal distribution shows that the morphology of the nanoporous gold is anisotropic. The topology of nanoporous gold is similar to that of other bicontinuous structures created by phase separation, despite the radically different method used to produce the structures. This work opens the door to time-resolved, in situ studies of coarsening of nanoporous gold in 3D.
| Original language | English (US) |
|---|---|
| Article number | 043122 |
| Journal | Applied Physics Letters |
| Volume | 96 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2010 |
Funding
We acknowledge Ms. Marie Cox, Mr. Ben Myers, and Dr. Xuexi Zhang (Northwestern University) for assistance with sample preparation. Dr. Wenjun Liu conducted the Laue diffraction at APS beamline 34-ID-E. Alix Deymier (NU) helped with the TXM measurements. Data analysis was assisted by Dr. Dimitris Kammer, Julie Fifth and Larry Aagesen (NU). We thank Dr. Yeukuang Hwu of Academia Sinica for developing the TXM capability at the APS through Partner User Proposal 64 and making it available for general users. Use of the Advanced Photon Source is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)