Surface morphology of organic thin films at various vapor flux

Gengxin Zhang; Brandon L. Weeks

doi:10.1016/j.apsusc.2009.10.068

Surface morphology of organic thin films at various vapor flux

Gengxin Zhang, Brandon L. Weeks

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

The surface morphology of the organic energetic material pentaerythritol tetranitrate (PETN) grown on silicon substrates has been investigated. The surface structure of the films reveal clearly differentiated morphologies which is dependent on the vapor flux. Dendrite crystals are formed with flux of 0.03 nm/s while the morphology shows a transition from dendrite branches to grain growth as the flux is increased to 0.3 nm/s. The deposition thickness did not show an obvious influence on the surface microstructure. Therefore, the deposition flux allows the production of PETN films with desired surface morphology in a controllable and reproducible way.

Original language	English
Pages (from-to)	2363-2366
Number of pages	4
Journal	Applied Surface Science
Volume	256
Issue number	8
DOIs	https://doi.org/10.1016/j.apsusc.2009.10.068
State	Published - Feb 1 2010

Keywords

Morphology
PETN
Surface diffusion
Vacuum deposition
Vapor flux

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abstract = "The surface morphology of the organic energetic material pentaerythritol tetranitrate (PETN) grown on silicon substrates has been investigated. The surface structure of the films reveal clearly differentiated morphologies which is dependent on the vapor flux. Dendrite crystals are formed with flux of 0.03 nm/s while the morphology shows a transition from dendrite branches to grain growth as the flux is increased to 0.3 nm/s. The deposition thickness did not show an obvious influence on the surface microstructure. Therefore, the deposition flux allows the production of PETN films with desired surface morphology in a controllable and reproducible way.",

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AU - Weeks, Brandon L.

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AB - The surface morphology of the organic energetic material pentaerythritol tetranitrate (PETN) grown on silicon substrates has been investigated. The surface structure of the films reveal clearly differentiated morphologies which is dependent on the vapor flux. Dendrite crystals are formed with flux of 0.03 nm/s while the morphology shows a transition from dendrite branches to grain growth as the flux is increased to 0.3 nm/s. The deposition thickness did not show an obvious influence on the surface microstructure. Therefore, the deposition flux allows the production of PETN films with desired surface morphology in a controllable and reproducible way.

KW - Morphology

KW - PETN

KW - Surface diffusion

KW - Vacuum deposition

KW - Vapor flux

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