Researchers led by Bienvenu Gael Fouda-Mbanga at Nelson Mandela College in Gzeberha, South Africa, have discovered a brand new type of powder for dusting fingerprints. It enabled them to seize nanoscale options extra vividly whereas growing the distinction between ridges and valleys. Hybrid Advances printed the research.
Fingerprint detection is likely one of the most important procedures in forensics. When fingerprints are dusted with a carbon-based powder, the substance adheres to the moisture and grease left behind by the distinctive ridges and valleys on the perpetrator’s fingers. The resultant sample can then be examined beneath a microscope and matched to the suspects’ fingerprints.
This novel substance, fabricated from manganese-doped iron oxide nanoparticles and coated with activated wool char, may make it simpler for forensic investigators to research crimes.
Metallic-oxide nanoparticles have not too long ago gained recognition for fingerprint detection. Not solely are they easy to make, however additionally they have a big floor space and chemical reactivity, permitting them to work together strongly with the chemical elements present in fingerprint residues. When coated with carbon, these nanoparticles enhance the distinction of fingerprint photographs, making them a lot simpler to look at.
Fouda-Mbanga’s staff used an inexpensive, environmentally pleasant “hydrothermal” strategy to create the iron oxide nanoparticles for his or her research. They then utilized activated charred wool to the particles.
This commercially accessible agricultural waste product improves the steadiness of the extra reactive nanoparticles whereas additionally being safer to make use of than conventional carbon-based powders because of its chemical inertness.
The researchers used their powder to mud fingerprint residues on a non-porous aluminum floor to evaluate its effectiveness. They then used a number of types of mild spectroscopy and electron microscopy to picture the residues.
The photographs they generated had been fairly promising. They displayed a starker distinction than a number of of the powder sorts evaluated in earlier experiments and uncovered options right down to a nanoscale stage. With this accomplishment, Fouda-Mbanga’s group now hopes to broaden the potential purposes of their nanoparticle fabrication methodology in forensic investigation.
Journal Reference:
Fouda-Mbanga, B. G., et al. (2024) Nanoarchitectonics of WLC-H3PO4–MnFe2O3 nanocomposite for latent fingerprint detection. Hybrid Advances. doi:10.1016/j.hybadv.2023.100122
Supply:
