A rapid and dual-mode visualization of latent and bloody fingermarks using Cr- and Sb-codoped titanium dioxide nanoparticles

Research progress in techniques for blood fingermark detection

“…为适应不同客体背景色的需要, Peng 等 [52,53] 借 助水溶液阳离子表面活性剂(SPR), 相继合成了绿色 纳米颜料 Co2TiO4、黄色纳米颜料 Cr0.1Sb0.1Ti0.8O2 作 为汗潜指印和血指印的检测试剂. 机理研究表明, 试 剂通过静电作用、 疏水作用和物理吸附作用等与血红 蛋白发生特异性作用, 灵敏度较高, 能够清晰可视化 指印三级特征, 且对遗留时间长达 3-6 个月的血痕依 然有效.…”

A daktiloszkópiai nyomkutatás modern módszerei I. – A fizikai módszerek

“…Általában a porok egy mikron átmérőjű gömböcskék vagy tíz mikron átmérőjű lapos pelyhek (lemezkék) (Choi et al, 2006). Napjainkban megjelentek a nano mérettartományba eső porok is (Jaber et al, 2012;Prabakaran & Pillay, 2021;Huang & Peng, 2021). c) Anyag: leggyakoribb a korom, a legváltozatosabb fém-oxidok, a mágnesporok.…”

Hydrophobic‐Binding‐Driven and Fluoresence‐Free Development of Aged Fingerprints Based on Zinc Oxide Nanoparticles

“…Since Menzel and his co-workers firstly introduced CdS quantum dots to latent fingerprint development on metallic and sticky surfaces in 2000, [1] nanotechnology has played an increasingly important role in forensic science due to high developing sensitivity derived from the nanoscale as well as high developing selectivity derived from the versatility of surface modification. [2][3][4][5] To this end, a mass of nanoparticles was reported as fingerprint developers, [6][7][8][9][10] such as iron, titanium, europium, cobalt and silicon oxides or their alloys. In addition, during the last decade, a variety of nanophosphors, including semiconducting metal/polymer dots, [11][12] organic aggregate luminogens, [13][14][15] rare earth-based powders, [16][17][18][19][20][21] metal-organic frameworks, [22][23][24] fluorescent carbon dots, [25][26][27][28][29][30][31][32][33] noble metal nanoclusters [34][35][36][37] and perovskite nanocrystals [38][39][40] have gradually become the mainstream for fingerprint development applications.…”