Nature Materials 11, 604–607 (2012); published online 27 May 2012; corrected after print 15 December 2017.

In the version of this Letter originally published, the x and y values of the data points in Fig. 2c were incorrect. The original and corrected versions are shown below.

The authors have also made some changes to the Supplementary Information: Fig. S9 has been replaced because the x values were incorrect; the value of the carbonate buffer concentration has been corrected to 10 mM; and the sentence on page 2 that read “Subsequently, non-reacted aldehyde sites were blocked with bovine serum albumin (BSA, 0.1 mg/mL) and ethanolamine (10 mM) in bicarbonate buffer for 1 h.” has been changed to “When modifying nanostars with antibodies, non-reacted aldehyde sites were blocked with bovine serum albumin (BSA, 0.1 mg/mL) and ethanolamine (10 mM) in bicarbonate buffer for 1 h.”

These changes do not affect the results of the paper.