Fig. 5From: Transdermal drug delivery system of lidocaine hydrochloride based on dissolving gelatin/sodium carboxymethylcellulose microneedlesLidoHCl DMNs. a Hydrogel-filled silicon mold. b and c Synthesized samples. d SEM at 280 × , e 500 × , f 80 × magnifications. g 0, h 5, and i 10 min after exposure to pH 5.5. j Before and k after the force applicationBack to article page