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. 2020 Feb 19;10:2931. doi: 10.1038/s41598-020-60057-8

Figure 2.

Figure 2

(a) The XPS spectrum of an MB sensing chip without any surface molecular modification. (b) The sulfur element micro-domain energy spectrum before and after SAM implantation. (c) The nitrogen element micro-domain energy spectrum before and after antibody implantation. (d) The sulfur element micro-domain energy spectrum before and after antibody implantation.