Erratum: Determining the Thickness and Completeness of the Shell of Polymer Core-Shell Nanoparticles by X-ray Photoelectron Spectroscopy, Secondary Ion Mass Spectrometry, and Transmission Scanning Electron Microscopy (The Journal of Physical Chemistry C (2019) 123:49 (29765−29775) DOI: 10.1021/acs.jpcc.9b09258)