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(A) Blue-shift in absorption spectra and Zn/Cu ratio of product NCs after shelling reactions using methanol/butanol washed CIS NCs as seeds and different precursor combinations and reaction temperatures. (B) Blue-shift in absorption spectra with respect to the change in the In/Cu ratio after the shelling reaction for the same samples shown in panel A. The change in the In/Cu ratio is obtained by dividing the ratios observed for the product NCs by those observed for the seed NCs.
