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Tamboli S, Nair GB, Kroon RE, Erasmus LJB, Swart HC. High-contrast multi-surface imaging of latent fingerprints using color-tunable YOF:Tb 3+,Eu 3+ ultrafine nanophosphors with high quantum yield. Dalton Trans 2024. [PMID: 38932632 DOI: 10.1039/d4dt01187b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2024]
Abstract
Visualization of latent fingerprints (LFPs) using conventional powders has faced challenges on multicolor surfaces. However, these challenges are addressed by the advent of fluorescent powders in LFP detection, and they have redefined the effectiveness of the powder dusting method. In this study, color-tunable YOF:Tb3+,Eu3+ nanophosphors were examined for LFP recognition and were evaluated for their practicality on different types of surfaces. Under 254 nm UV irradiation, the LFPs developed using these nanophosphors showed clear and distinct ridge patterns with level 1, 2, and 3 details. The ultrafine particles of these nanophosphors adhered to the ridge patterns and replicated the minutiae of the LFPs. Meanwhile, the variation of the Tb3+/Eu3+ ratio demonstrated multicolor fluorescence emission from the nanophosphors, which provided better contrast between the ridge patterns on complex surfaces. Furthermore, the high luminescence quantum yield of the nanophosphors ensured high-resolution fluorescence images of the LFPs with a well-defined pattern that was recognizable even without any microscope or sophisticated instrumentation.
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Affiliation(s)
- Sumedha Tamboli
- Department of Physics, University of the Free State, P. O. Box 339, Bloemfontein 9300, South Africa.
| | - Govind B Nair
- Department of Physics, University of the Free State, P. O. Box 339, Bloemfontein 9300, South Africa.
| | - Robin E Kroon
- Department of Physics, University of the Free State, P. O. Box 339, Bloemfontein 9300, South Africa.
| | - Lucas J B Erasmus
- Department of Physics, University of the Free State, P. O. Box 339, Bloemfontein 9300, South Africa.
| | - Hendrik C Swart
- Department of Physics, University of the Free State, P. O. Box 339, Bloemfontein 9300, South Africa.
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Krushna BRR, Manjunatha K, Wu SY, Sivaganesh D, Sharma SC, Sridhar C, Joy FD, Ramesha H, Prakash Dalbanjan N, Devaraju KS, Nagabhushana H. Ultrasound-driven facile fabrication of Pd doped SnO 2 hierarchical superstructures: Structural, growth mechanism, dermatoglyphics, and anti-cancer activity. BIOMATERIALS ADVANCES 2024; 160:213855. [PMID: 38643692 DOI: 10.1016/j.bioadv.2024.213855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 03/29/2024] [Accepted: 04/08/2024] [Indexed: 04/23/2024]
Abstract
This research introduces a novel method that leverages Spirulina extract (S.E) as a bio-surfactant in the ultrasound-assisted synthesis (UAS) of Pd3+ (0.25-10 mol%) doped tin oxide (SnO2) self-assembled superstructures. Nanotechnology has witnessed significant advancements in recent years, driven by the exploration of novel synthesis methods and the development of advanced nanomaterials tailored for specific applications. Metal oxide nanoparticles, particularly SnO2, have garnered considerable attention due to their versatile properties and potential applications in various fields, including gas sensing, catalysis, and biomedical engineering. The study explores how varying influential parameters like S.E concentration, sonication time, pH, and sonication power can influence the resulting superstructures' morphology, size, and shape. A theoretical model for forming different hierarchical superstructures (HS) is proposed. X-ray diffraction (XRD) analysis confirms the crystalline tetragonal rutile phase of the SnO2:Pd HS. Raman spectroscopy reveals a red shift in the A1g mode, indicating phonon confinement due to various defects in the SnO2 structure. Further characterization using transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) provides insights into particle size, surface morphology, elemental composition, and binding energy. The study also demonstrates the application of optimized SnO2:3Pd HS in developing latent fingerprints (LFPs) on different surfaces using a simple powder dusting (PD) method, with the fingerprints (FPs) visualized under normal light. A mathematical model developed in Python-based software is used to analyze various features of the developed FPs, including pore properties such as number, position, inter-spacing, area, and shape. Additionally, an in vitro MTT assay shows concentration-dependent anticancer activity of SnO2:3Pd nanoparticles (NPs) on MCF7 cell lines, highlighting their potential as a promising cancer treatment option. Overall, the study suggests that the optimized HS can serve as multifunctional platforms for biomedical and dermatoglyphics applications, demonstrating the versatility and potential of the synthesized materials.
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Affiliation(s)
- B R Radha Krushna
- Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572 103, India
| | - K Manjunatha
- Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan.
| | - Sheng Yun Wu
- Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan.
| | - D Sivaganesh
- Institute of Physics and Technology, Ural Federal University, Mira str., Yekaterinburg, Russia
| | - S C Sharma
- Honorary Professor of Law and Forensic Materials, Jain University, Bangalore-562112, India
| | - C Sridhar
- Meenakshi Academy of Higher Education and Research, Chennai 600078, India
| | - Fr Deepu Joy
- Department of Life Sciences, Kristu Jayanti College, Autonomous, Bengaluru, Karnataka 560077, India
| | - H Ramesha
- Department of Biochemistry, Karnatak University, Dharwad 580003, India
| | | | - K S Devaraju
- Department of Biochemistry, Karnatak University, Dharwad 580003, India
| | - H Nagabhushana
- Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572 103, India.
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Swathi BN, Krushna BRR, Daruka Prasad B, Sharma SC, Subramanian B, Nagabhushana H. Unclonable fluorescence of MgO-ZrO 2 :Tb 3+ nanocomposite for versatile applications in data security, dermatoglyphics. LUMINESCENCE 2023; 38:232-249. [PMID: 36626333 DOI: 10.1002/bio.4440] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/28/2022] [Accepted: 01/08/2023] [Indexed: 01/11/2023]
Abstract
Latent fingerprints (LFPs) are one among the most important types of evidences at crime scenes because of the distinctiveness and tenacity of the friction ridges in fingerprints (FPs). Therefore, it is essential in forensic science to develop a reliable method to detect LFPs. Traditional detection methods still face a number of difficulties, such as limited sensitivity, low contrast, strong background, and complex processing stages. In this study, MgO-ZrO2 :Tb3+ (1-5 mol%) (MZ:Tb) nanocomposites (NCs) were prepared via a simple solution combustion (SC) method at low temperature. The photoluminescence (PL) investigation demonstrates that when excited at 379 nm, the produced NCs emits distinctive emission peaks of terbium ions (Tb3+ ). According to the photometric results, the NCs can be employed as warm light NCs and emit light in the green portion of the colour spectrum. The estimated optical band gap from diffuse reflectance spectra is found to be in the range 4.84-4.97 eV. Regardless of the type of surface being used, the optimized MgO-ZrO2 :Tb3+ (4 mol%) (MZ:4Tb) NCs has a strong ability to minimize background fluorescence interference. With high contrast LFP and I-V type of cheiloscopy, these NCs present a flexible fluorescent mark for the identification of levels 1-3 details in forensic investigation.
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Affiliation(s)
- B N Swathi
- Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur, India
| | - B R Radha Krushna
- Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur, India
| | - B Daruka Prasad
- Department of Physics, BMS Institute of Technology and Management, VTU-Belagavi Affiliated, Bengaluru, India
| | - S C Sharma
- Honarory Professor, Jain Deemed to be University, Bengaluru, India
| | - Balanehru Subramanian
- School of Biological Sciences, Sri Balaji Vidyapeeth (Deemed to be University), Puducherry, India
| | - H Nagabhushana
- Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur, India
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Stimuli-responsive color-tunable BaLa2ZnO5:Bi3+ phosphor for the encryption and authentication of security patterns and latent fingerprint detection. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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Sreedhara R, Krushna BR, Prasad BD, Subramanian B, Manjunatha K, Wu SY, Shetty A, Nagabhushana H. A cost-effective intense blue colour cobalt doped gahnite pigment for latent finger print, cheiloscopy and anti-counterfeiting applications. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Shashikala B, Premkumar H, Sharma S, Nagabhushana H, Daruka Prasad B, Darshan G. Dy3+ ions activated CaAl2O4 nanophosphors: Photoluminescent and photometric properties prompted manifold applications. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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