Radiation damage in silicon studied in situ by nanocalorimetry

J. F. Mercure, R. Karmouch, Y. Anahory, S. Roorda, F. Schiettekatte*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations

Abstract

In situ observations of thermal processes involving nJ energies are impractical, if not impossible, with conventional differential scanning calorimetry (DSC), but the nanometric scale of recently developed nanocalorimetry systems should make such observations possible. Nanocalorimetry is based on membrane calorimeters made using nanofabrication technologies. Here we present initial results of an in situ investigation of damage dynamics in amorphous silicon (a-Si). A thin film of a-Si was deposited on the calorimeter membrane and implanted with low-energy Si ions. One-time heat releases were measured for doses ranging from 1012 to 1014ion cm -2. Subsequent calorimetry scans showed no difference with the baselines, indicating that the damage remaining is stable over the temperature of operation. The measurements were taken immediately after ion implantation in the same environment and were repeated. For doses of 1012ion cm -2 and less, the signal intensity was below the sensitivity limit. A saturation of the total heat released was observed. This saturation was correlated with previous DSC measurements and attributed to the relaxation of ion beam implanted a-Si.

Original languageAmerican English
Pages (from-to)622-625
Number of pages4
JournalPhysica B: Condensed Matter
Volume340-342
DOIs
StatePublished - 31 Dec 2003
Externally publishedYes
EventProceedings of the 22nd International Conference on Defects in (ICDS-22) - Aarhus, Denmark
Duration: 28 Jul 20031 Aug 2003

Bibliographical note

Funding Information:
The authors are thankful to R. Gosselin, L. Godbout and O. Grenier for their technical assistance, and to P. Infante and M. Skvarla of the Cornell Nanofabrication Facility for their help with silicon nitride deposition. This work was supported by the Natural Science and Engineering Council of Canada (NSERC).

Keywords

  • Annealing
  • DSC
  • Damage
  • Nanocalorimetry

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