Enhanced Sensitivity of Surface Plasmon Resonance Biosensor Functionalized with Doped Polyaniline Composites for the Detection of Low-Concentration Acetone Vapour

Figure 8

Gaseous-phase SPR sensing of acetone vapour using (a) bare gold-, (b) PANI/chitosan-, and (c) ternary composite-based SPR biosensor at different concentrations in ppm. (d) Selectivity of the SPR biosensor to acetone vapour against other interfering gases such as ethanol, methanol, and ammonia for 10 ppm concentration.

(a)

(b)

(c)

(d)