Updates are available Correction dated 2018-01-08

Article History

Received: 6 December 2016

Accepted: 23 February 2017

First Online: 31 March 2017

Change Date: 8 January 2018

Change Type: Update

Change Details: A correction has been published and is appended to both the HTML and PDF versions of this paper. The error has been fixed in the paper.

Change Date: 8 January 2018

Change Type: Erratum

Change Details: Scientific Reports 7: Article number: 45378; published online: 31 March 2017; updated: 08 January 2018 In the original version of this Article, Li Li and Hongbian Li were incorrectly affiliated with ‘CAS Center for Excellence in Nanoscience, 11, Beiyitiao, Zhonguancun, Beijing, 100190, China’. The correct affiliations for Li Li and Hongbian Li are listed below.

Competing interests

: The authors declare no competing financial interests.