Page 42 - Veritas - 02.03.22

• Highly fluorescent, water-soluble CdTe QDs were processed with Mer-

captosuccinic acid (MSA) at a pH of 10. The LP can be processed by im-

mersing the non-porous and porous surface in the QD solution for 1-3

seconds.

• Fingerprints were developed on an aluminum foil surface by a

dusting powder made by combining Cadmium Sulfide, which is a

highly photoluminescent QD, along with Chitosan mixture and

Sodium Sulfide.

CONCLUSION

Fingerprints are the unique evidence found in an SoC due to their

ability to individualize and link the perpetrator to the SoC or the

victim. The development methods used play a crucial role in

obtaining accurate results during fingerprint analysis. The

conventional methods used for development may not be efficient

enough to obtain prints in wet conditions, aged prints, or detect

hidden prints. Development using nanoparticles was proven to be

more effective by overcoming certain drawbacks faced previously.

Different nanoparticles like gold, silver, zinc oxide, silica, QDs were very

effective in development on both porous and non-porous

surfaces. They produced fingerprint images of enhanced contrast and

less background staining, and their adhering property helped in better

visualization. Therefore, development using nanoparticles has

proven to be a great asset in the field of forensic science, thereby

having a great applicative potential in the future.

REFERENCES:

• Prasad, Prasad, P. Chandravanshi, Lukose, and Agarwal. (2020). The

Emerging Role of Nanoparticles in Forensic Fingerprinting. Journal of

Seybold Report, 15(9), 2124-2131.

Retrieved from https://www.irte.com/researches/Research%20

Paper%20DrSally%20DrPrashant.pdf