Erratum to: J Nanobiotechnol (2016) 14:23 DOI 10.1186/s12951-016-0175-z

After publication of this article [1], we received support to pay the article processing charge. Part of the open access publishing fee for this manuscript has been provided by the Texas A&M University Online Access to Knowledge Fund (OAKFund), supported by the University Libraries and the Office of the Vice President for Research.