Fig. 9From: Rapid visualization of latent fingermarks using gold seed-mediated enhancementOptical images of latent fingermarks separately pre-treated with a temperature of 40 and 50 °C and b PBS at pH 5 and 9 for 24 h before treatment with Au seed-mediated enhancement. All samples used the same experimental conditions. The treatment time of LBA-Au NPs (200 µL) and Au+-complex solution (300 µL) for fingermarks were 5 and 3 min, respectivelyBack to article page