Skip to main content Accessibility help

An in Situ Small Angle Neutron Scattering Investigation of Ag0.7Au0.3 Dealloying Under Potential Control

  • Sean G. Corcoran (a1), David G. Wiesler (a2) and Karl Sieradzki (a3)


In situ small angle neutron scattering (SANS) was used to characterize the formation of the random 3-dimensional porous structure created during the dealloying of a Ag0.7Au0.3 alloy under potential control. Using a model developed by N.F. Berk (Phys. Rev. Lett., 58 (1987) 2718) for the scattering properties of random porous media, we were able to characterize the average ligament width as a function of time during the dealloying process. We find that the coarsening of the average ligament width is strongly dependent upon the value of the applied potential. Our results represent the first in situ nanoscale characterization of the 3-dimensional formation of porosity in a dealloying system under potential control.



Hide All
1. Li, Rong and Sieradzki, K., Phys. Rev. Lett. 68, 1168 (1992).
2. Sieradzki, K. and Newman, R.C., J. Phys. Chem. Solids 48, 1101 (1987).
3. Kelly, R.G., Young, A.J. and Newman, R.C., in Electrochemical Impedance: Analysis and Interpretation, edited by Scully, J.R., Silverman, D.C. and Kendig, M.W. (ASTM, Philadelphia, 1993) pp. 94112.
4. Chen, S.J., Sanz, F., Ogletree, D.F., Hallmark, V.M., Devine, T.M. and Salmeron, M., Surf. Sci. 292, 289 (1993);
Moffat, T.P., Fan, F.F. and Bard, A.J., J. Electrochem. Soc. 138, 3224 (1991).
5. Corcoran, S.G., Wiesler, D.G., Barker, J., and Sieradzki, K., Mat. Res. Soc. Proc., 376, (1994).
6. Berk, N.F., Phys. Rev. Lett. 58, 2718 (1987); Phys. Rev. A 44, 5069 (1991).
7. Berk, N.G., Glinka, C.J., Haller, W., and Sander, L.C., Mat. Res. Soc. Symp. Proc. 166, 409 (1990).


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed