Effect of Zn doping on the sublimation rate of pentaerythritol tetranitrate using atomic force microscopy

Subrata Mridha, Brandon L. Weeks

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A series of Zn ion-doped pentaerythritol tetranitrate (PETN) nanoislands in the form of thin films were prepared on Si substrates using spin coating. The effect of Zn concentrations on the sublimation energy was investigated by atomic force microscopy (AFM). The pure and Zn-doped nanoislands are imaged by AFM in contact mode at room temperature after annealing isothermally for a given time. The volume of the islands starts to decrease after annealing at 45°C for pure PETN, whereas Zn-doped nanoislands start to decrease in height and volume after annealing at 55 - 58°C. The minimum activation energy is found to be 29.7 Kcal/mol for 1,000 ppm Zn concentration. These studies are important for the long-term stabilization of PETN.

Original languageEnglish
Pages (from-to)181-187
Number of pages7
JournalScanning
Volume31
Issue number5
DOIs
StatePublished - Sep 2009

Keywords

  • Activation energy
  • Atomic force microscopy
  • Pentaerythritol tetranitrate
  • Stabilization
  • Sublimation

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