Funding for this research was provided by:
Natural Science Foundation of Shaanxi Province (2015JZ011)
National Natural Science Foundation of China (51572163)
National Natural Science Foundation of China (51577111)
National Natural Science Foundation of China (21401123)
IDENTIFIERS
COPYRIGHT AND LICENSING
: The Royal Society of Chemistry has an exclusive publication licence for this journal
PEER REVIEW METHOD
: Single-blind
PUBLICATION HISTORY
: Received 10 April 2017; Accepted 5 May 2017; Version of Record published 30 May 2017