Funding for this research was provided by:
Ministry of Education - Singapore (R-279-000-410-112, R-279-000-429-112)
National University of Singapore (R-261-508-001-646, R-279-000-369-133)
COPYRIGHT AND LICENSING
: The Royal Society of Chemistry has an exclusive publication licence for this journal
OPEN ACCESS: The accepted version of this article will be made freely available after a 12 month embargo period
PUBLICATION HISTORY
: Received 14 May 2015; Accepted 5 August 2015; Accepted Manuscript published 6 August 2015; Advance Article published 19 August 2015; Version of Record published 16 September 2015