Luminescence detection of latent fingermarks on non-porous surfaces with heavy-metal-free quantum dots

Sorour Shahbazi, Rhiannon Boseley, Braden Grant, Dechao Chen, Thomas Becker, Oluwasesan Adegoke, Niamh Nic Daéid, Guohua Jia (Lead / Corresponding author), Simon W. Lewis (Lead / Corresponding author)

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Current and proposed nanoparticle-based techniques for development of latent fingermarks suffer a number of drawbacks such as complicated, multi-step and time-consuming procedures, batch-to-batch variability, expensive reagents, large background noise and toxicity. Here, we introduce a promising green development technique based on heavy-metal-free quantum dots for the detection of latent fingermarks on non-porous surfaces. Red-near infrared luminescent CuInS2/ZnS core/shell quantum dots in aqueous solution were produced in large scales using a simple, fast, water-based method with N-acetylcysteine as a biocompatible surfactant to coat the particles. The coated quantum dots were applied to the successful development of latent fingermarks deposited on a variety of surfaces, including highly patterned polymer banknotes and the sticky side of adhesive tape.

Original languageEnglish
Article number100222
Pages (from-to)1-6
Number of pages6
JournalForensic Chemistry
Volume18
Early online date29 Jan 2020
DOIs
Publication statusPublished - May 2020

Keywords

  • Forensic science
  • Latent fingermarks
  • Photoluminescence
  • Quantum dots

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