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. 2022 Dec 29;13(1):53. doi: 10.3390/bios13010053

Figure 20.

Figure 20

(a) Illustration of piezoelectric inkjet printing of bioreceptors on a sensor surface. (b) Image of antibody/antigen and BSA solutions spotted on silicon nitride photonic ring resonators using a Scienion SX microarrayer. The top (control) ring is spotted with BSA solution, and the bottom (test) ring is spotted with anti-(SARS-CoV-2 spike protein) polyclonal antibody solution (a-S1 + S2). Part (b) is reproduced from Ref. [167] in accordance with the Creative Commons Attribution 4.0 International (CC BY 4.0) license.