Sn doping percentages in In2O3 and volume fraction of NCs in solution was experimentally determined by utilizing ICP-AES technique on a Varian 720-ES ICP Optical Emission Spectrometer. Samples for the ICP-AES were processed by digesting a known volume of the stock solution of NC in aqua-regia mixture for 48 hours. This was followed by diluting the aqua-regia solution with milli-Q water such that the total acid concentration becomes approximately 2% v/v. Standard solutions of variable concentration for different elements were prepared by diluting the commercial ICP-AES standard with 2% HNO3 solution in milli-Q water. The Sn doping percentage was calculated by taking a mole fraction of Sn concentration with respect to the total metal concentration (In + Sn) obtained in the ICP-AES. The volume fraction of Sn:In2O3 NCs was calculated from the concentration of In and Sn in the analyte using an assumed stoichiometry of (In+Sn)2O3 and density of 7140 mg/mL. -acid solution in THF was first prepared following literature reports. Afterwards, NCs from their hexane solution were first precipitated with ethanol and a stock solution of NCs in anhydrous THF:toluene (1:1) mixture was prepared. To perform the titrations, 50 µL of 0.02 M [H(OEt2)] + [BAr -solution was added to 200 uL of NC stock solution in a quartz cuvette with 1 mm pathlength. Subsequently, 5 uL aliquots of 0.02 M CoCp*2 solution were added to this mixture and shaken. During each addition to the quartz cuvette, in situ spectroscopy measurements were performed in absorbance mode with a fiber-coupled ASD Inc. PANalytical spectrometer. To establish equilibrium, each measurement was carried out 1.5 minutes after the addition of an aliquot. For each sample, titrations were repeated three times for the same volume of the stock solution to check reproducibility in data.