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Harrington JL, Gee WJ. Improving flow dynamics and storage longevity of a low-cost phosphorescent fingerprint powder. J Forensic Sci 2024; 69:1441-1448. [PMID: 38807281 DOI: 10.1111/1556-4029.15549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 04/15/2024] [Accepted: 05/08/2024] [Indexed: 05/30/2024]
Abstract
An inexpensive, commercially available doped strontium aluminate phosphor with long-lived afterglow was prepared as a luminescent fingerprint dusting powder suited for challenging, highly patterned substrates; however, prolonged exposure to humidity was found to reduce that powder's affinity for fingermarks. Here, an enhanced preparation for synthesizing that fingerprint dusting powder is presented that prevents powder aggregation and loss of function upon exposure to humid environments. This was achieved by introducing a flow regulator during synthesis: hydrophobic silica SIPERNAT® D10 or SIPERNAT® D17. Increasing the hydrophobicity of the powder prevents aggregation by inhibiting the uptake of water, thereby improving the material's flow dynamics and transfer behavior from brush to fingermark. The angle of repose and flow characteristics made by the modified powders were quantified, with excellent affinity for fingermarks observed, even after being stored under 85% (±5%) humidity for 4 weeks. A preliminary comparison of the performance of the modified hydrophobic powders relative to the unmodified precursor revealed that more of the SIPERNAT® treated powder typically adhered to fingermarks while simultaneously imparting less background development. In addition, fewer clumps of particulate were observed in the developed fingermarks after addition of a hydrophobic flow regulator. This technical report outlines the updated method for synthesizing the fingerprint powder, with summarized flow performance results, and a demonstration of the modified powder's affinity for simulated fingermark evidence.
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Affiliation(s)
- Jodie L Harrington
- School of Environment and Science, Griffith University, Brisbane, Queensland, Australia
| | - William J Gee
- School of Environment and Science, Griffith University, Brisbane, Queensland, Australia
- Queensland Micro- and Nanotechnology Centre, Griffith University, Brisbane, Queensland, Australia
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2
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Kumar A, Crista DMA, Núñez-Montenegro A, Esteves da Silva JCG, Verma SK. Annealing-assisted optimization for persistency of afterglow of SrAl 2O 4:Eu 2+/Dy 3+ microparticles for forensic detection. RSC Adv 2023; 13:28676-28685. [PMID: 37790103 PMCID: PMC10543204 DOI: 10.1039/d3ra03872f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 08/17/2023] [Indexed: 10/05/2023] Open
Abstract
In the present work, Eu2+/Dy3+ ions doped/co-doped into persistent SrAl2O4 microparticles have been developed through solid-state synthesis followed by homogenization and particle size reduction in a ball milling device. These particles have shown a broad and long-persistent afterglow around the 528 nm wavelength of electromagnetic radiation through a broad excitation at around 400 nm. The luminescence intensity was optimized through the selection of different annealing temperatures in the range of 1100 °C to 1500 °C, with intervals of 100 °C. Several structural and optical characterization techniques, such as XRD, SEM, FTIR, thermogravimetric analysis, and photoluminescence, were utilized to judge the preparation and ability of these particles in possible applications in latent fingermark detection on various difficult surfaces. The persistency and stability of these particles were calculated using a digital lux meter.
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Affiliation(s)
- Abhishek Kumar
- Chemistry Research Unit (CIQUP), Institute of Molecular Sciences (IMS), Departamento de Geociências, Ambiente e Ordenamento do Território, Faculdade de Ciências, Universidade do Porto Rua do Campo Alegre s/n Porto 4169-007 Portugal
- Department of Physics & Electronics, Kamla Nehru Institute of Physical and Social Sciences (KNIPSS) Sultanpur Uttar Pradesh 228118 India
| | - Diana M A Crista
- Chemistry Research Unit (CIQUP), Institute of Molecular Sciences (IMS), Departamento de Geociências, Ambiente e Ordenamento do Território, Faculdade de Ciências, Universidade do Porto Rua do Campo Alegre s/n Porto 4169-007 Portugal
- Ferreira Martins & Filhos - Madeiras e Derivados S. A. R. Pinheiro 3 4710-348 Braga Portugal
| | - Ara Núñez-Montenegro
- Chemistry Research Unit (CIQUP), Institute of Molecular Sciences (IMS), Departamento de Geociências, Ambiente e Ordenamento do Território, Faculdade de Ciências, Universidade do Porto Rua do Campo Alegre s/n Porto 4169-007 Portugal
- Ferreira Martins & Filhos - Madeiras e Derivados S. A. R. Pinheiro 3 4710-348 Braga Portugal
| | - Joaquim C G Esteves da Silva
- Chemistry Research Unit (CIQUP), Institute of Molecular Sciences (IMS), Departamento de Geociências, Ambiente e Ordenamento do Território, Faculdade de Ciências, Universidade do Porto Rua do Campo Alegre s/n Porto 4169-007 Portugal
| | - Santosh Kumar Verma
- School of Chemistry and Chemical Engineering, Yulin University Yulin City 719000 Shaanxi China
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3
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Hopkins SL, Clarke KT, Krosch MN, Gee WJ. Preparation of a low-cost fingerprint powder that harnesses white light to emit long-lived phosphorescence. Sci Justice 2023; 63:500-508. [PMID: 37453782 DOI: 10.1016/j.scijus.2023.04.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 03/12/2023] [Accepted: 04/29/2023] [Indexed: 07/18/2023]
Abstract
An inexpensive, commercially available doped strontium aluminate phosphor with long-lived afterglow has been prepared and assessed in the role of a luminescent fingerprint dusting powder. Blue, green, and aqua phosphorescence persisting for ca. 30 s was obtainable from treated fingermarks after charging the powders with the white light (400-700 nm) setting of a forensic light source. Imaging the phosphorescent afterglow enabled the elimination of background emissions encountered during latent fingermark examination. This was demonstrated by visualising fingermarks on substrates that possess inbuilt fluorescent security features and highly patterned substrate backgrounds, without any need for bespoke scientific equipment.
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Affiliation(s)
- Scarlet L Hopkins
- School of Environment and Science, Griffith University, 170 Kessels Road, Brisbane, QLD 4111, Australia
| | - Kristen T Clarke
- School of Environment and Science, Griffith University, 170 Kessels Road, Brisbane, QLD 4111, Australia
| | - Matthew N Krosch
- Quality Management Section, Forensic Services Group, Queensland Police Service, Brisbane, 4000 QLD, Australia
| | - William J Gee
- School of Environment and Science, Griffith University, 170 Kessels Road, Brisbane, QLD 4111, Australia.
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4
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Swati G, Bidwai D, Haranath D. Red emitting CaTiO 3: Pr 3+ nanophosphors for rapid identification of high contrast latent fingerprints. NANOTECHNOLOGY 2020; 31:364007. [PMID: 32422623 DOI: 10.1088/1361-6528/ab93ee] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Red emitting (~612 nm) CaTiO3:Pr3+ long afterglow nanocrystals with a persistence time ~20 min (dark adapted human eyes) have been synthesised for developing high contrast latent fingerprints using the sol-gel process. Due to the persistent emission, CaTiO3:Pr3+ nanophosphor does not require a continuous source for excitation, thereby eliminating the background information even from multi-colour substrates, resulting in a high signal to noise ratio. As a consequence of which, minute features of level- I, II and III can be clearly studied in high contrast fingerprints. Considerable blue shift (~20 nm) was recorded in photoluminescence excitation due to the quantum confinement properties of CaTiO3:Pr3+ nanocrystals. Powder x-ray diffraction confirms the formation of a single phase orthorhombic structure of CaTiO3:Pr3+ with average crystallite size ~40 nm. Spectral parameters indicate a very high color purity of 99% with CIE coordinates (0.62, 0.37) which are very close to NTSC standards for an ideal red-emission. Transmission electron microscopy studies confirm the formation of spherical particles with narrow size distribution which makes them suitable to combine with fingerprint development methods such as powder dusting and cyanoacrylate fuming methods.
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Affiliation(s)
- G Swati
- Center for Nanotechnology Research, Vellore Institute of Technology, Vellore 632014, India
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5
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Olszowska I, Leśniewski A, Kelm A, Pieta IS, Siejca A, Niedziółka-Jönsson J. Zinc oxide quantum dots embedded in hydrophobic silica particles for latent fingermarks visualization based on time-gated luminescence measurements. Methods Appl Fluoresc 2020; 8:025001. [DOI: 10.1088/2050-6120/ab6f24] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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6
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Das A, Saha S, Panigrahi K, Ghorai UK, Chattopadhyay KK. Enhanced Photoluminescence Properties of Low-Dimensional Eu 3+-Activated Y 4Al 2O 9 Phosphor Compared to Bulk for Solid-State Lighting Applications and Latent Fingerprint Detection-Based Forensic Applications. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2019; 25:1422-1430. [PMID: 31025617 DOI: 10.1017/s143192761900028x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In recent years, nanoscale phosphors have become vital in optoelectronic applications and to understand the improved performance of nanophosphors over bulk material, detailed investigation is essential. Herein, trivalent europium-activated Y4Al2O9 phosphors were developed by solid-state reaction and solvothermal reaction methods and their performance as a function of their dimension was studied for various applications. Under 394 nm optical excitation, the photoluminescence (PL) emission, excited state lifetime of the nanophosphor, exhibits greater performance than its bulk counterpart. The homogeneous spherical structure of the nanophosphors as compared with solid lumps of bulk phosphors is the basis for almost 40% of the enhancement in nanophosphors' intense red emission compared to the bulk. Moreover, the thermal stability of the nanophosphor is much better than the bulk phosphor, which clearly indicates a key advantage of nanophosphor. The superior performance of Eu3+-doped Y4Al2O9 nanophosphors over their bulk counterparts has been demonstrated for industrial phosphor-converted light-emitting diodes and visualization of latent fingerprint.
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Affiliation(s)
- Antika Das
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata-700032, West Bengal, India
| | - Subhajit Saha
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata-700032, West Bengal, India
| | - Karamjyoti Panigrahi
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata-700032, West Bengal, India
| | - Uttam Kumar Ghorai
- Department of Industrial Chemistry and Applied Chemistry, Swami Vivekananda Research Centre, Ramakrishna Mission Vidyamandira, Belurmath, Howrah-711202, West Bengal, India
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7
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Komahal FF, Nagabhushana H, Basavaraj R, Darshan G, Prasad BD, Sharma S, Kavyashree D. Design of Bi-functional composite core–shell SiO2@ZnAl2O4:Eu3+ array as a fluorescent sensors for selective and sensitive latent fingerprints visualization protocol. ADV POWDER TECHNOL 2018. [DOI: 10.1016/j.apt.2018.05.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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8
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Govindaiah S, Sreenivasa S, Ramakrishna RA, Rao TMC, Nagabhushana H. Regioselective Synthesis, Antibacterial, Molecular Docking and Fingerprint Applications of 1-Benzhydrylpiperazine Derivatized 1,4-Disubstituted 1,2,3-Triazoles. ChemistrySelect 2018. [DOI: 10.1002/slct.201801364] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Shivaraja Govindaiah
- Department of Studies and Research in Chemistry; Tumkur University; Tumkur-572103
| | - Swamy Sreenivasa
- Department of Studies and Research in Chemistry; Tumkur University; Tumkur-572103
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9
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Christofidis G, Morrissey J, Birkett JW. Detection of Fingermarks-Applicability to Metallic Surfaces: A Literature Review. J Forensic Sci 2018. [PMID: 29518259 DOI: 10.1111/1556-4029.13775] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
There are many different fingermark visualization techniques available, and the choice of methodology employed may be dependent on the surface type. This comprehensive review of the scientific literature evaluates the methodologies of fingermark enhancement methods that are applicable to metallic surfaces; optical, physical, chemical, and physicochemical methods are critically discussed. Methods that are currently used and those that have the potential to reduce the cost and time required to process evidence and increase the recovery rates are considered and are assessed against the Centre for Applied Science and Technology (CAST) and the International Fingerprint Research Group (IFRG) guidelines. The use of chemical imaging techniques in particular has increased the potential to recover fingermarks of sufficient quality for identification purposes. Presently, there appears to be a lack of detailed research pertaining to validation and thorough casework studies for fingermark enhancement techniques. Further studies incorporating these guidelines are recommended.
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Affiliation(s)
- George Christofidis
- School of Pharmacy and Biomolecular Sciences, Faculty of Science, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, U.K
| | - Joanne Morrissey
- Department of Biomedical and Forensic Sciences, Faculty of Science and Technology, Anglia Ruskin University, East Road, Cambridge, CB1 1PT, U.K
| | - Jason W Birkett
- School of Pharmacy and Biomolecular Sciences, Faculty of Science, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, U.K
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10
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Zheng X, Li K, Xu J, Lin Z. The effectiveness and practicality of using simultaneous superglue & iodine fuming method for fingermark development on ‘low yield’ leather surfaces: A feasibility study. Forensic Sci Int 2017; 281:152-160. [DOI: 10.1016/j.forsciint.2017.10.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 10/09/2017] [Accepted: 10/30/2017] [Indexed: 11/29/2022]
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11
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Yu Y, Yan L. Rapid Synthesis of C-dots@PGV Nanocomposites Powders for Development of Latent Fingermarks. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20170182] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yanlin Yu
- School of Bioengineering, Chongqing University, No. 174 Shazhengjie, Shapingba District, Chongqing 400044, China
- School of Criminal Investigation, Southwest University of Political Science and Law, and Forensic Science Engineering Research Center of Universities in Chongqing, No. 301, Baosheng Ave, Yubei District, Chongqing 401120, China
| | - Lei Yan
- School of Criminal Investigation, Southwest University of Political Science and Law, and Forensic Science Engineering Research Center of Universities in Chongqing, No. 301, Baosheng Ave, Yubei District, Chongqing 401120, China
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12
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R.B. B, H. N, G.P. D, B. DP, S.C. S, K.N. V. Ultrasound assisted rare earth doped Wollastonite nanopowders: Labeling agent for imaging eccrine latent fingerprints and cheiloscopy applications. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2017.02.019] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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King RS, Skros DA. Sunlight-activated near-infrared phosphorescence as a viable means of latent fingermark visualisation. Forensic Sci Int 2017; 276:e35-e39. [DOI: 10.1016/j.forsciint.2017.04.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 04/18/2017] [Accepted: 04/18/2017] [Indexed: 10/19/2022]
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14
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Kim YJ, Jung HS, Lim J, Ryu SJ, Lee JK. Rapid Imaging of Latent Fingerprints Using Biocompatible Fluorescent Silica Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:8077-8083. [PMID: 27452188 DOI: 10.1021/acs.langmuir.6b01977] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Fluorescent silica nanoparticles (FSNPs) are synthesized through the Stöber method by incorporating silane-modified organic dye molecules. The modified fluorescent organic dye molecule is able to be prepared by allylation and hydrosilylation reactions. The optical properties of as-prepared FSNPs are shown the similar optical properties of PR254A (allylated Pigment Red 254) and have outstanding photostability. The polyvinylpyrrolidone (PVP) is introduced onto the surface of FSNP to enhance the binding affinity of PVP-coated FSNP for latent fingerprints (LFPs) detection. The simple preparation and easy control of surface properties of FSNPs show potential as a fluorescent labeling material for enhanced latent fingerprint detection on hydrophilic and hydrophobic substrates in forensic science for individual identification.
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Affiliation(s)
- Young-Jae Kim
- Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University , Seoul 08826, South Korea
| | - Hak-Sung Jung
- Laboratory of Molecular Biophysics, National Heart, Lung, and Blood Institute, National Institutes of Health , 50 South Drive, Building 50, Room 3517, Bethesda, Maryland 20892, United States
| | - Joohyun Lim
- Department of Chemistry, Seoul National University , Seoul 08826, South Korea
| | - Seung-Jin Ryu
- Forensic Chemistry Laboratory, National Forensic Service , Seoul 08036, South Korea
| | - Jin-Kyu Lee
- Department of Chemistry, Seoul National University , Seoul 08826, South Korea
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15
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Xiong X, Yuan X, Song J, Yin G. Time-Resolved Detection of Fingermarks on Non-Porous and Semi-Porous Substrates Using Sr2MgSi2O7:Eu2+, Dy3+ Phosphors. APPLIED SPECTROSCOPY 2016; 70:995-1000. [PMID: 27076516 DOI: 10.1177/0003702816641266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 09/09/2015] [Indexed: 06/05/2023]
Abstract
Eu(2+), Dy(3+) co-doped strontium-magnesium silicate phosphors, Sr2MgSi2O7:Eu(2+), Dy(3+) (SMSEDs), have shown great potential in optoelectronic device due to their unique luminescent property. However, their potential applications in forensic science, latent fingermark detection in particular, are still being investigated. In this contribution, SMSEDs were successfully employed to latent fingermarks on a variety of non-porous and semi-porous surfaces, including aluminum foil, porcelain, glass, painted wood, colored paper, and leather. All the results illustrated that this luminescent powder, as a long-lasting phosphorescence material (LLP), was an ideal time-resolved detection reagent of fingermark for elimination of background interferences from various difficult substrates, and offered a good contrast to allow their identification without the need to enhance the results compared to nanosized organic fluorescent powder.
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Affiliation(s)
- Xiaobo Xiong
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, China Hubei Key Laboratory of Forensic Science, Hubei University of Police, Wuhan, China
| | - Ximing Yuan
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, China
| | - Jiangqi Song
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, China
| | - Guoxiang Yin
- Hubei Key Laboratory of Forensic Science, Hubei University of Police, Wuhan, China
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16
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Wang M. Latent fingermarks light up: facile development of latent fingermarks using NIR-responsive upconversion fluorescent nanocrystals. RSC Adv 2016. [DOI: 10.1039/c6ra04573a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
NaYF4:Yb,Er and NaYbF4:Er/Tm/Ho upconversion fluorescent nanocrystals were used in latent fingermark development with high contrast, high sensitivity, and high selectivity.
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Affiliation(s)
- Meng Wang
- Department of Trace Examination
- National Police University of China
- Shenyang 110035
- China
- Key Laboratory of Impression Evidence Examination and Identification Technology
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17
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Wu P, Xu C, Hou X, Xu JJ, Chen HY. Dual-emitting quantum dot nanohybrid for imaging of latent fingerprints: simultaneous identification of individuals and traffic light-type visualization of TNT. Chem Sci 2015; 6:4445-4450. [PMID: 30155001 PMCID: PMC6088367 DOI: 10.1039/c5sc01497b] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 05/21/2015] [Indexed: 01/21/2023] Open
Abstract
A nanohybrid was employed for fingerprint imaging that was capable of simultaneous identification of individuals and TNT visualization in a “traffic-light” manner.
Fingerprints are a unique characteristic of an individual. Recently, it has been realized that fingerprints carry more information about individuals than just their identity, for example, they may identify potential addicts and terrorists carrying explosives. Therefore, the development of imaging moieties capable of both fingerprint staining and drug/explosive visualization is of significant importance for forensic chemistry. Here we developed a nanohybrid comprising green- and red-emitting QDs for simultaneous fingerprint imaging and TNT visualization in fingerprints. The red-emitting Cu-doped ZnCdS (Cu–ZnCdS) QDs were embedded into silica nanoparticles and the green-emitting ZnCdS QDs were anchored onto the surface of the silica nanoparticles and further functionalized with polyallylamine (PAA). Both components of the nanohybrid, i.e., the PAA-functionalized green QDs and red QD-doped silica nanoparticles, could be explored for fingerprint imaging. Due to the formation of a Meisenheimer complex between TNT and PAA, the green-emitting QDs could be quenched by TNT, meanwhile the red-emitting QDs were inert. Therefore, the nanohybrid exhibited a traffic light-type fluorescence color change (green-yellow-red) to TNT concentration in the range of 40–400 μM. This method is promising for potential applications in security-screening needs in public areas such as airports and train stations.
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Affiliation(s)
- Peng Wu
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , China . ; .,Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Chaoying Xu
- Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Xiandeng Hou
- Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , China . ;
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , China . ;
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18
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Soni AK, Dey R, Rai VK. Stark sublevels in Tm3+–Yb3+ codoped Na2Y2B2O7 nanophosphor for multifunctional applications. RSC Adv 2015. [DOI: 10.1039/c4ra15891a] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The phase and crystal structure of the Na2Y2B2O7:Tm3+–Yb3+ inorganic phosphor prepared by solution combustion method have been identified. These observations show that the developed material can be used in optical devices and for biological applications.
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Affiliation(s)
- Abhishek Kumar Soni
- Laser and Spectroscopy Laboratory
- Department of Applied Physics
- Indian School of Mines
- Dhanbad
- India
| | - Riya Dey
- Laser and Spectroscopy Laboratory
- Department of Applied Physics
- Indian School of Mines
- Dhanbad
- India
| | - Vineet Kumar Rai
- Laser and Spectroscopy Laboratory
- Department of Applied Physics
- Indian School of Mines
- Dhanbad
- India
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19
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Xie HH, Wen Q, Huang H, Sun TY, Li P, Li Y, Yu XF, Wang QQ. Synthesis of bright upconversion submicrocrystals for high-contrast imaging of latent-fingerprints with cyanoacrylate fuming. RSC Adv 2015. [DOI: 10.1039/c5ra15255k] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
High-contrast imaging of latent-fingerprints was obtained by the combination of bright UCPs and CA-fuming.
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Affiliation(s)
- Han-Han Xie
- Department of Physics
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology
- Wuhan University
- Wuhan
- China
| | - Qian Wen
- Department of Physics
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology
- Wuhan University
- Wuhan
- China
| | - Hao Huang
- Department of Physics
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology
- Wuhan University
- Wuhan
- China
| | - Tian-Ying Sun
- Department of Physics
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology
- Wuhan University
- Wuhan
- China
| | - Penghui Li
- Institute of Biomedicine and Biotechnology
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen
- China
| | - Yong Li
- Institute of Biomedicine and Biotechnology
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen
- China
| | - Xue-Feng Yu
- Institute of Biomedicine and Biotechnology
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen
- China
| | - Qu-Quan Wang
- Department of Physics
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology
- Wuhan University
- Wuhan
- China
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20
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Lumicyano™: A new fluorescent cyanoacrylate for a one-step luminescent latent fingermark development. Forensic Sci Int 2013; 233:104-12. [DOI: 10.1016/j.forsciint.2013.07.008] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 06/08/2013] [Accepted: 07/05/2013] [Indexed: 11/23/2022]
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Singh SK, Singh AK, Rai SB. Efficient dual mode multicolor luminescence in a lanthanide doped hybrid nanostructure: a multifunctional material. NANOTECHNOLOGY 2011; 22:275703. [PMID: 21597133 DOI: 10.1088/0957-4484/22/27/275703] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The present work deals with inorganic-organic hybrid nanostructures capable of producing intense visible emission via upconversion (UC), downconversion (DC), and energy transfer (ET) processes which show the potential of the material as a luminescent solar collector (LSC), particularly to improve the efficiency of silicon solar cells. To achieve this, Gd2O3:Yb3+/Er3+ phosphor (average particle size∼35 nm) and a Eu(DBM)3Phen organic complex have been synthesized separately and then the hybrid structure has been developed using a simple mixing procedure. Intense UC emission (in the red, green, and blue regions) due to Er3+ is observed on near infrared (976 nm) excitation which shows color tunability with input pump power. In contrast, intense red emission of Eu3+ is observed on ultaviolet (UV) (355 nm) excitation. The feasibility of energy transfer from Er3+ ions to Eu3+ ions has also been noted. These excellent optical properties are retained even if the particles of the hybrid nanostructure are dispersed in liquid medium, which also makes it suitable for security ink purposes.
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Affiliation(s)
- S K Singh
- Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi-221005, India
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Abstract
Silicon dioxide-based nanocomposites offer large loading capacity for various doping chemicals or molecular complexes, high surface to volume ratio and customizable surface chemistry for the creation and development of novel sensors and devices [1-2]. When compared with other sol-gel materials, xerogels represent a class of nanocomposites that are relatively easy to fabricate but with unique thermal, acoustic, optical and mechanical properties for rapid sensor or device prototyping development [3-4]. Xerogels in solids are formed by controlled evaporation of the liquid in the hydro-gel. Their porosity and morphology depend largely on the temperature, gel chemical compositions and pH in the fabrication process. When impregnated with fluorescent compounds in their nanosize cavities, the doped xerogels exhibit strong and stable fluorescence properties that are useful for the developing of ion-exchange sensors and optical devices. However, the use of these fluorescently doped xerogels in forensic applications was still largely unexplored.
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Affiliation(s)
- T. A. Brettell
- Department of Chemical and Physical Sciences, Cedar Crest College, 100 College Drive, Allentown, Pennsylvania 18104-6196, United States
| | - J. M. Butler
- Biochemical Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8312, United States
| | - J. R. Almirall
- Department of Chemistry and Biochemistry and International Forensic Research Institute, Florida International University, University Park, Miami, Florida 33199, United States
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