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. 2022 Jun 21;23(13):6888. doi: 10.3390/ijms23136888

Table 1.

Atomic composition (%) of the surface of each sample.

Chemical Element S0 S1 S2
O 1s 88.21 81.7 70.1
Ti 2p 11.79 13.49 16.12
Ca 2p - 4.8 3.77
Cu 2p - - 1.91