Issue 28, 2010

Infrared spectroscopy and vibrational exciton modeling of crystalline, polycrystalline and amorphous acetylene aerosol particles

Abstract

Mid-infrared spectra of acetylene aerosol particles generated under conditions relevant to Titan's atmosphere are analyzed in terms of the vibrational exciton model. The analysis reveals that acetylene aerosol particles do not form single crystals below 110 K as previously assumed. Instead, less ordered structures such as polycrystalline particles with orthorhombic crystalline domains or possibly partially amorphous particles derived from an orthorhombic crystal structure are found to be very stable. Annealing of these particles leads to the formation of crystalline particles with an orthorhombic crystal structure. Particles with a cubic crystal structure were never observed at these temperatures in agreement with the phase behavior of bulk acetylene.

Graphical abstract: Infrared spectroscopy and vibrational exciton modeling of crystalline, polycrystalline and amorphous acetylene aerosol particles

Article information

Article type
Paper
Submitted
05 Feb 2010
Accepted
30 Mar 2010
First published
03 Jun 2010

Phys. Chem. Chem. Phys., 2010,12, 7924-7933

Infrared spectroscopy and vibrational exciton modeling of crystalline, polycrystalline and amorphous acetylene aerosol particles

T. C. Preston, G. Firanescu and R. Signorell, Phys. Chem. Chem. Phys., 2010, 12, 7924 DOI: 10.1039/C002525A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements