12/3/2023 0 Comments Tented arch fingerprintToday fingerprints are often recorded for subsequent matching with digital fingerprint scanners either standalone or as part of a mobile device. Historically fingerprints were recorded by smearing ink on the fingertip and pressing it onto paper to form physical fingerprint impressions 1. In all situations, fingerprint identification relies on the collection of fingerprint data for comparison and matching. Forensic science relies heavily on fingerprints collected at crime scenes as evidence fingerprint scanning systems at borders, corporate buildings, and in our mobile devices (smartphones, pads, and laptops), keep our personal identity and data safe. The pattern of friction ridges on our fingertips form unique patterns known as fingerprints that are popularly adapted for personal identification. We envision that the microcontact replication protocol via unconventional PC molding promises a practical, bench-top, instrumentation-free method to mass reproduce many other micro/nanostructures with high fidelity. Superior to artificial fingerprint patterns, these phantoms have the exact 3D features of fingerprints and introduce no variability compared to human sampling, which make them perfect targets for standardizing fingerprint scanners and for biometric applications. By testing with standard optical fingerprint scanners, we have shown that all three levels of fingerprint details can be precisely recorded and match well with the original fingerprint. By pressing an impression of human fingerprints onto solvent-softened plastic plates (e.g., polycarbonate chips), followed by casting with polydimethylsiloxane (PDMS, a popular elastomer), we can produce a flexible, nanoscale detailed, 3D reproduction of the fingerprint (“phantom”). Herein we describe a novel bench-top method of making 3D fingerprint replicas (namely, fingerprint phantoms) by exploring a unique microfabrication approach using conventional polymeric materials, to aid the development of reliable and accurate fingerprint biometrics. Fingerprint biometrics is a valuable and convenient security tool every fingerprint is highly detailed and unique, we always have them on “hand”.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |