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Luminescence Detection of Latent Fingermarks on Non-porous Surfaces with Heavy-Metal-Free Quantum Dots

preprint
revised on 21.01.2020 and posted on 22.01.2020 by Sorour Shahbazi, Rhiannon Boseley, Braden Grant, Dechao Chen, Thomas Becker, Oluwasesan Adegoke, Niamh Nic Daeid, Guohua Jia, Simon W. Lewis

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 (QD) for the detection of latent fingermarks on non-porous surfaces. Red-near infrared luminescent Cu-In-S/ZnS core-shell QDs solution was produced in large scales using a water-based, simple and fast method using N-acetyl-cysteine as a biocompatible surfactant to coat the particles. The coated QDs 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.

Funding

ARC DECRA scheme (Project ID: DE160100589) funding support for G. Jia

History

Email Address of Submitting Author

s.lewis@curtin.edu.au

Institution

Curtin University

Country

Australia

ORCID For Submitting Author

0000-0002-2049-1586

Declaration of Conflict of Interest

No conflict of interest

Version Notes

Version V3: Revisions to title and format.

Exports