Highly-selective recognition of latent fingermarks by La-sensitized Ce nanocomposites <i>via</i> electrostatic binding

Peng, Di; Huang, Mengjun; Xiao, Yaruo; Zhang, Yuyan; Li, Lei; Zhu, Jiang

doi:10.1039/c9cc04257a

Cited by 10 publications

(5 citation statements)

References 38 publications

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“…Typically, fluorescent nanomaterials have been highly concerned in forensic science during the last two decades on account of their excellent luminescent property, smaller particle size, versatile surface modification, and low toxicity. Lately, rare earth nanocrystals, − perovskite nanostructures, − fluorescent polymer nanoparticles, − Mn 4+ -doped red emissive phosphors, , and aggregation-induced emission luminogens − were continually reported as effective fingerprint developers. Nonetheless, their practical use for forensic investigation is still limited because of the complicated syntheses, expensive raw materials, or poisonous regents.…”

Section: Introductionmentioning

confidence: 99%

Carbon Dot Powders with Cross-Linking-Based Long-Wavelength Emission for Multicolor Imaging of Latent Fingerprints

Wang

Huang

Ding

et al. 2022

ACS Appl. Nano Mater.

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A simple and convenient preparation of multicolor carbon dot (CD) solutions was proposed using neutral red as the carbon and nitrogen sources by a layering and extraction procedure. After poly(vinylpyrrolidone) (PVP) as the cross-linking agent was doped into as-prepared solutions, red-, orange-, and yellow-emitting CD powders were finally fabricated with solid-state fluorescence quantum (QY) yields of 6.33, 16.5, and 43.6%, respectively. Through studies of surface functional groups and photoluminescence (PL) property compared with solution and powder states of CDs, the cross-linking effect emission (CEE) brought by PVP was confirmed in charge of the high solid-state QY of CD powders. In addition, the conjugate structure of neutral red and increasing hydrophobicity are believed to be responsible for the long-wavelength emission of CD powders. Notably, multicolor imaging of latent fingerprints (LFPs) was successfully achieved on complex background surfaces under 365 nm UV illumination. As a result, these carbon-based phosphors are promising in forensic investigation, bioimaging, and sensing fields.

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Section: Introductionmentioning

confidence: 99%

Carbon Dot Powders with Cross-Linking-Based Long-Wavelength Emission for Multicolor Imaging of Latent Fingerprints

Wang

Huang

Ding

et al. 2022

ACS Appl. Nano Mater.

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“…[2][3][4][5] To this end, a mass of nanoparticles was reported as fingerprint developers, [6][7][8][9][10] such as iron, titanium, europium, cobalt and silicon oxides or their alloys. In addition, during the last decade, a variety of nanophosphors, including semiconducting metal/polymer dots, [11][12] organic aggregate luminogens, [13][14][15] rare earth-based powders, [16][17][18][19][20][21] metal-organic frameworks, [22][23][24] fluorescent carbon dots, [25][26][27][28][29][30][31][32][33] noble metal nanoclusters [34][35][36][37] and perovskite nanocrystals [38][39][40] have gradually become the mainstream for fingerprint development applications. In theory, the high or color-tunable fluorescence of nanophosphors can enhance the contrast of developed fingerprints on various backgrounds.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic‐Binding‐Driven and Fluoresence‐Free Development of Aged Fingerprints Based on Zinc Oxide Nanoparticles

Peng

2022

ChemistrySelect

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The requirement of nonfluorescent developers for aged latent fingerprint development is still of great urgency in forensic science. To enhance the specific interaction between fingerprint residue and nano-developers, a γ-methacryloxy propyl trimethoxyl silane (MPTS) modified zinc oxide nanoparticle (ZnO NP) was synthesized. The crystal structure, morphology, surface functional group, thermostability, UV/Vis spectra, photoluminescence and stability of sedimentation were characterized to prove the hydrophobicity, UV blocking nature and nonfluorescence of as-prepared MPTS-modified ZnO NPs. Additionally, after the specific surface area (SSA) of samples with different MPTS amount was analyzed by BET, a competitive adsorption mechanism between silane-ZnO bonding and silane oligomer-ZnO deposition was suggested. In the demonstration of latent fingerprint development, the powder dusting method was utilized on various surfaces both in positive and reversed imaging modes, exhibiting the high contrast, high sensitivity, high selectivity and wide applicability, even for aged fingerprints. Therefore, it provides a new strategy for fast, efficient and inexpensive development of older latent fingerprints in forensic analysis.

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“…Since 19th century, fingerprints have been used as one of the most important means for criminal investigations and many studies have focused on the development of fingerprint detection techniques. [1] Among the emerging strategies, the use of luminescent nanoparticles, especially rare earth fluorescent nanomaterials, [2][3][4] gold nanoparticles [5,6] and quantum dots, [7,8] was regarded as the most notable one in the field. [9] It was found that small powder particles adhere better on fingermark residue and then the detected residue are easily observed in virtue of the fluorescent properties of nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

One‐Step Synthesis of Solid‐State Photoluminescent Carbon Nanodots from Grains for Latent Fingerprint Detection

Wang

Chen

et al. 2020

ChemistrySelect

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Employing grains (wheat, corn, sorghum and rice) as precursors, a series of carbon nanodots (CDs) have been prepared via one‐step hydrothermal treatment. All the CDs have narrow size distribution, roughly spherical shape and similar optical properties. The size depends on the precursors, which varies from 2 to 25 nm. The CDs without further treatment can overcome aggregation‐induced quenching effect, and emit stable bright blue luminescence under UV light irradiation in both colloidal and solid states. Additionally, the mechanism for the solid‐state fluorescence of CDs was also explored. Moreover, the feasibility of CDs as fluorescent labels for latent fingerprint detection was investigated and the results demonstrate well‐defined papillary ridges with higher sensitivity and wider applicability. The work provides a simple, low‐cost, and promising alternative for latent fingerprint detection in forensic science.

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Highly-selective recognition of latent fingermarks by La-sensitized Ce nanocomposites via electrostatic binding

Abstract: A series of binuclear (Ce,La) nanocomposite fluorescent powders was elaborately designed for highly-selective recognition of latent fingermarks, which were proved to combine with fingermark residues electrostatically without any damage to touch-DNA.

Cited by 10 publications

References 38 publications

Carbon Dot Powders with Cross-Linking-Based Long-Wavelength Emission for Multicolor Imaging of Latent Fingerprints

Carbon Dot Powders with Cross-Linking-Based Long-Wavelength Emission for Multicolor Imaging of Latent Fingerprints

Hydrophobic‐Binding‐Driven and Fluoresence‐Free Development of Aged Fingerprints Based on Zinc Oxide Nanoparticles

One‐Step Synthesis of Solid‐State Photoluminescent Carbon Nanodots from Grains for Latent Fingerprint Detection

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