Effect of microstructure on the nanomechanical properties of Zn 1-x Cd x Se alloys

Hua Chiang Wen*, Chu Shou Yang, Wu-Ching Chou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


We present a study of the nanoindentation behavior of Zn 1-x Cd x Se epilayers grown using molecular beam epitaxy; the surface roughness, microstructure, and crystallinity were analyzed using atomic force microscopy, cross-sectional transmission electron microscopy, and X-ray diffraction; the hardness H and elastic modulus E were studied using nanoindentation techniques. We found that these highly crystalline materials possessed no stacking faults or twins in their microstructures. We observed a very marked increase in the value of H and a significant decrease in the value of E upon increasing the concentration of Cd, presumably because of an increase in the stiffness of the CdSe bond relative to that of the ZnSe bond. We observed a corresponding shrinkage of the contact-induced damage area for those films having a small grain size and a higher value of H. It appears that resistance against contact-induced damage requires a higher Cd concentration.

Original languageEnglish
Pages (from-to)2128-2131
Number of pages4
JournalApplied Surface Science
Issue number7
StatePublished - 15 Jan 2010


  • Hardness
  • Nanoindentation
  • XTEM
  • ZnCdSe

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