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. 2019 Feb 22;9(2):302. doi: 10.3390/nano9020302

Figure 1.

Figure 1

Proposed sensing mechanism and structure of the ligands used in AuNP-1 preparation. Reaction of the terminal resorcinol with formaldehyde induces cross-linking aggregation of the gold nanoparticles. AuNP: gold nanoparticles; LA: lipoic acid.