Correction to: Scientific Reports https://doi.org/10.1038/s41598-017-07502-3, published online 07 August 2017

In this Article, Junko Morikawa is incorrectly listed as being affiliated with ‘Infrared Microspectroscopy Beamline, Australian Synchrotron, Clayton, Victoria, 3168, Australia’

The correct affiliation is listed below:

‘Tokyo Institute of Technology, Meguro-ku, Tokyo, 152-8550, Japan’

This error has now been corrected in the PDF and HTML versions of the paper, and in the accompanying Supplementary Information.