Design and synthesis of silica- and silicate-based materials, and their application in the development and analysis of latent fingerprints

Yuan, Chuanjun; Wang, Meng; Li, Ming

doi:10.1016/j.trac.2023.117278

Cited by 10 publications

(1 citation statement)

References 109 publications

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“…Consequently, there has been a call for alternative, non-invasive methods. Technological improvements in forensics, specifically in latent fingerprint detection, have extensively enriched the criminal justice system, and their utility has extended into broader areas, including regulation enforcement, border safety, and biometric authentication [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Barium Lanthanum Oxide Nanosheets in Photocatalytic and Forensic Applications: One-Pot Synthesis and Characterization

Majani,

Meghana,

S H

et al. 2023

Molecules

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The present work elucidates the fabrication of Barium Lanthanum Oxide nanosheets (BaLa2O4 NSs) via a simple one-pot precipitation method. The acquired results show an orthorhombic crystal system with an average crystallite size of 27 nm. The morphological studies revealed irregular-shaped sheets stacked together in a layered structure, with the confirmation of the precursor elements. The diffused reflectance studies revealed a strong absorption between 200 nm and 350 nm, from which the band-gap energy was evaluated to be 4.03 eV. Furthermore, the fluorescence spectrum was recorded for the prepared samples; the excitation spectrum shows a strong peak at 397 nm, attributed to the 4F7/2→4G11/2 transition, while the emission shows two prominent peaks at 420 nm (4G7/2→4F7/2) and 440 nm (4G5/2→4F7/2). The acquired emission results were utilized to confirm the color emission using a chromaticity plot, which found the coordinates to be at (0.1529 0.1040), and the calculated temperature was 3171 K. The as-prepared nanosheets were utilized in detecting latent fingerprints (LFPs) on various non-porous surfaces. The powder-dusting method was used to develop latent fingerprints on various non-porous surfaces, which resulted in detecting all the three ridge patterns. Furthermore, the as-synthesized nanosheets were used to degrade methyl red (MR) dye, the results of which show more than 60% degradation at the 70th minute. It was also found that there was no further degradation after 70 min. All the acquired results suggest the clear potential of the prepared BaLa2O4 NSs for use in advanced forensic and photocatalytic applications.

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Section: Introductionmentioning

confidence: 99%

Barium Lanthanum Oxide Nanosheets in Photocatalytic and Forensic Applications: One-Pot Synthesis and Characterization

Majani,

Meghana,

S H

et al. 2023

Molecules

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Unconventional Fluorescent Magnetic Mesoporous Microspheres for Visualizing Latent Fingerprints

Chen,

Fan,

Peng

et al. 2024

Adv Funct Materials

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High‐resolution visualization of latent fingerprints is key to effectively assessing crime scenes. Unconventional luminophores provide promising application potentials due to facile preparation and excellent biocompatibility, but are rarely reported for imaging latent fingerprints (LFPs). Here, a novel and cost‐effective strategy is developed to prepare unconventional fluorescent magnetic mesoporous microspheres (UFMMMs) by growing a mesoporous silicon shell, templated by designed amphipathic unconventional luminescent (N‐eicosanoyl‐hydroxyproline, C20‐HYP) aggregate micelles, on the magnetite core. The obtained UFMMMs with blue unconventional fluorescence and an average diameter of 650 nm can clearly visualize the level 1–3 details of LFPs on different substrates. The outstanding capability in imaging fingerprints results from the combined effects of the fine luminescence, paramagnetism, and high dispersion of UFMMMs. The intermolecular interactions between C20‐HYP and amino in UFMMMs enhance the fluorescence intensity by increasing electron delocalization and the proportion of π‐electrons. This study provides a new perspective for the controllable construction of fluorescent probes based on unconventional luminophores.

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Molecular Engineering of Benzobisoxazole‐Based Conjugated Polymers for High‐Performance Organic Photodetectors and Fingerprint Image Sensors

Shin,

Jeong,

Darici Lee

et al. 2024

Energy & Environ Materials

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Various novel conjugated polymers (CPs) have been developed for organic photodetectors (OPDs), but their application to practical image sensors such as X‐ray, R/G/B, and fingerprint sensors is rare. In this article, we report the entire process from the synthesis and molecular engineering of novel CPs to the development of OPDs and fingerprint image sensors. We synthesized six benzo[1,2‐d:4,5‐d']bis(oxazole) (BBO)‐based CPs by modifying the alkyl side chains of the CPs. Several relationships between the molecular structure and the OPD performance were revealed, and increasing the number of linear octyl side chains on the conjugated backbone was the best way to improve Jph and reduce Jd in the OPDs. The optimized CP demonstrated promising OPD performance with a responsivity (R) of 0.22 A/W, specific detectivity (D*) of 1.05 × 1013 Jones at a bias of −1 V, rising/falling response time of 2.9/6.9 μs, and cut‐off frequency (f‐3dB) of 134 kHz under collimated 530 nm LED irradiation. Finally, a fingerprint image sensor was fabricated by stacking the POTB1‐based OPD layer on the organic thin‐film transistors (318 ppi). The image contrast caused by the valleys and ridges in the fingerprints was obtained as a digital signal.

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Design and synthesis of silica- and silicate-based materials, and their application in the development and analysis of latent fingerprints

Cited by 10 publications

References 109 publications

Barium Lanthanum Oxide Nanosheets in Photocatalytic and Forensic Applications: One-Pot Synthesis and Characterization

Barium Lanthanum Oxide Nanosheets in Photocatalytic and Forensic Applications: One-Pot Synthesis and Characterization

Unconventional Fluorescent Magnetic Mesoporous Microspheres for Visualizing Latent Fingerprints

Molecular Engineering of Benzobisoxazole‐Based Conjugated Polymers for High‐Performance Organic Photodetectors and Fingerprint Image Sensors

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