t-Bu3ArO • solution was prepared from the parent phenol, 2,4,6-tri-tert-butylphenol, by following earlier literature reports. The chemical oxidation of Sn:In2O3 NCs was carried out by first reducing the NCs to the LSPR saturation point using 0.02 M CoCp*2 and thereafter, subsequent additions of 5 µL aliquots of 0.02 M t-Bu3ArO • solution in toluene were made until the LSPR peak position corresponded to the LSPR energy of the as-synthesized NCs.