Latent fingerprint development by using silver nanoparticles and silver nitrate—A comparative study

Abstract

The beginning of latent fingerprint development on porous surface was first achieved by silver nitrate (AgNO 3 ) method. But the significantly increasing cost has caused forensic experts to look for an alternative means. Silver nitrate (AgNO 3 ) is the main component in the synthesis of metal nanoparticles, namely silver nanoparticles (AgNPs). Owing to its unique property to adhere with fingerprint residue, AgNPs have attracted a great attention in the domain of nano-forensic fingerprinting. This study mainly focuses on the use of lower concentration of silver nitrate through new AgNP

From nanomaterials to macromolecules: Innovative technologies for latent fingerprint development

“…In order to circumvent some limitations of the Ag-PD method, Prasad et al (2021) proposed the synthesis of AgNPs with size ranging from 1 to 100 nm. The notion was that the large specific surface area would develop latent fingerprints at a faster rate with a small quantity of AgNO 3 solution.…”

Time-Gated Imaging of Latent Fingerprints with Level 3 Details Achieved by Persistent Luminescent Fluoride Nanoparticles

“…) to Level 3 (width of the fingerprint ridge and the shape of the edge and the size of the pores, etc. ). − To date, cyanoacrylate fuming, , silver nitrate, 1,8-diazafluoren-9-one (DFO), and ninhydrin developing technologies have been widely used due to their versatility and convenience. However, they show disadvantages of harm to the human body, complex aftertreatment, and low imaging accuracy. , Quantum dots (QDs), , up-conversion nanoparticles (UCNPs), , and fluorescent dye molecules ,, have been reported as luminescent imaging agents for advanced LFP imaging technologies, which can greatly improve the sensitivity and accuracy.…”

“…5 to Level 3 (width of the fingerprint ridge and the shape of the edge and the size of the pores, etc.). 6−8 To date, cyanoacrylate fuming, 9,10 silver nitrate, 11 1,8-diazafluoren-9one (DFO), 12 and ninhydrin 13 developing technologies have been widely used due to their versatility and convenience. However, they show disadvantages of harm to the human body, complex aftertreatment, and low imaging accuracy.…”

Novel Organic-Inorganic Hybrid Polystyrene Nanoparticles with Trichromatic Luminescence for the Detection of Latent Fingerprints

“…A variety of efforts to develop rapid, sensitive, and economical techniques for the detection of latent fingerprints have emerged in the past few years [1]. To date, these techniques including powder dusting [7][8][9][10][11], fluorescent dye staining [12,13], ninhydrin spraying [14], cyanoacrylate/ iodine fuming [1,15], vacuum metal deposition, and small particle reagent method [16][17][18][19][20] are the most widely used due to their simplicity, efficiency, and ease of operation. Although these traditional methods are effective under ordinary circumstances, there are still numerous challenges to visualize latent fingerprints with high contrast and low background interference on multicolor background, and there is an urgent need in seeking simple and efficient methods for developing the latent fingerprints with improved contrast, sensitivity, and selectivity.…”