Document is current

CROSSCHECK

: This document is CrossCheck deposited

COPYRIGHT AND LICENSING

: The Royal Society of Chemistry has an exclusive publication licence for this journal

OPEN ACCESS: This article is freely available. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0)

PUBLICATION HISTORY

: Received 18 June 2016; Accepted 4 August 2016; Accepted Manuscript published 4 August 2016; Advance Article published 10 August 2016; Version of Record published 13 September 2016