Pyroelectric, piezoelectric, and photoeffects in hydroxyapatite thin films on silicon

S. B. Lang, S. A.M. Tofail, A. A. Gandhi, M. Gregor, C. Wolf-Brandstetter, J. Kost, S. Bauer, M. Krause

Research output: Contribution to journalArticlepeer-review

72 Scopus citations


Hydroxyapatite (HA) is the major component of bone and is used in artificial form in many biomedical applications. It was once believed to have a centrosymmetric crystal structure. In theoretical and experimental studies published in 2005, it was shown to have a monoclinic P 21 structure. In the work reported here, 500 nm films of HA were spin-coated on silicon wafers. The materials were not poled. They had a nonuniform polarization distribution and exhibited pyroelectricity, piezoelectricity, and photoeffects. Structures of this type may have a number of technological applications.

Original languageEnglish
Article number123703
JournalApplied Physics Letters
Issue number12
StatePublished - 21 Mar 2011

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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