Fig. 3From: Highly sensitive plasmonic paper substrate fabricated via amphiphilic polymer self-assembly in microdroplet for detection of emerging pharmaceutical pollutantsThe contact angle of aqueous AgNO3 droplet (left) injected with DI water, (middle) injected with 0.1 mg mL− 1 bCP in DMF/CHCl3, and (right) injected with DMF/CHCl3. Inset: photographs of droplets corresponding to each case deposited on the wax-patterned paperBack to article page