Advances in the Application of Organic Materials for the Development of Latent Fingerprints
- Corresponding author: Jin Xiaodong, jinxiaodong@jspi.edu.cn Xu Tongxiang, xutongxiang@jspi.edu.cn Ma Rongliang, marl2013@163.com
Citation: Jin Xiaodong, Bi Tianbo, Xin Ran, Wu Guoping, Xu Tongxiang, Ma Rongliang. Advances in the Application of Organic Materials for the Development of Latent Fingerprints[J]. Chinese Journal of Organic Chemistry, ;2020, 40(12): 4184-4202. doi: 10.6023/cjoc202004036
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Conditions: 18 concentration: 0.25 mmol/L, λex=365 nm, the water fraction was 50% (volume fraction) (a: glass), 40% (volume fraction) (b: stainless steel sheet) and 40% (volume fraction) (c: aluminium foil), respectively
Note: First, Pdot 43, carboxyl-functionalized polystyrene PS-PEG-COOH, and ninhydrin dyes were mixed well in THF and then coprecipitated in water under vigorous sonication to form ninhydrin-embedded Pdot 43. The Pdot solution was then sprayed onto latent fingerprint regions to image fingerprints with dual (colorimetric and fluorometric) readouts
Left: under daylight; Right: under 450 nm light irradiation with an orange filter
(ⅰ) No surfactant, (ⅱ) w(Tween85)=0.25%, (ⅲ) w(SDS)=0.25%, (ⅳ) w(Tween80)=0.25%, and (ⅴ) w(Span80)=0.25%