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Gupt U, Premkumar HB, Nunez JPJ, Mallick J, Hadimani RL, Kar M, Dayal V, Prabhu TN. Exploring Optically Stable Reddish-Orange Fluorescent Magnetic Pigment (0.90)Y 2O 3:(0.10-x)Eu 3+:(x)Bi 3+ for Anti-counterfeiting Applications. J Fluoresc 2023:10.1007/s10895-023-03520-9. [PMID: 38041793 DOI: 10.1007/s10895-023-03520-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Accepted: 11/15/2023] [Indexed: 12/03/2023]
Abstract
The (0.90)Y2O3:(0.10-x)Eu3+:(x)Bi3+ nanophosphors (0.00 ≤ x ≤ 0.06) are synthesised using chemical combustion citrate route and characterized via X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, UV- visible and photoluminescence spectroscopy. The scanning electron micrographs indicate that the grain size of the phosphors ranges between 40 to 50 nm. The photoluminescence (PL) spectra, acquired under the excitation wavelength of 365 nm of ultraviolet light, show emission peaks at wavelengths 580 nm, 586-598 nm, 610 nm, 629-661 nm and 686-695 nm corresponding to the 5D0 → 7FJ electronic transitions of the Eu3+ ion with J = 0, 1, 2, 3 and 4, respectively. The most intense PL spectra at 611 nm (5D0 → 7F2), showcasing reddish-orange emission, indicate a higher concentration of Eu3+ ions in asymmetric sites within the Y2O3 host matrix. The presence of the distinct electronic transitions of Eu3+ in PL spectra acclaims that Bi3+ ions transfer their energy efficiently to Eu3+ ions in the matrix. Physical and chemical tests are being conducted on nanophosphors with Bi3+ substitutional doping of x = 0.02 and x = 0.04, both demonstrating intense PL emission. Magnetisation measurements suggest the soft magnetic nature of the nanophosphors, attributing it to the presence of Eu3+ ions in the 7F2 state. The highest PL intensity is seen in the nanophosphor (x = 0.04) with substitutional doping of 6% of Eu3+ and 4% of Bi3+ in Y2O3. This nanophosphor also demonstrates excellent optical stability in the investigated conditions and exhibits soft magnetic behaviour, positioning it as a promising material for incorporation as a fluorescent magnetic pigment in security ink applications. These features serve to prevent counterfeiting of secured documents both optically and magnetically.
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Affiliation(s)
- Udayan Gupt
- Department of Chemistry, Faculty of Mathematical and Physical Sciences, M S Ramaiah University of Applied Sciences, Bengaluru, 560058, India
| | - H B Premkumar
- Department of Physics, Faculty of Mathematical and Physical Sciences, M S Ramaiah University of Applied Sciences, Bengaluru, 560058, India.
| | - John Peter J Nunez
- Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, 23285, USA
| | - Jyotirekha Mallick
- Department of Physics, Indian Institute of Technology-Patna, Patna, Bihar, 801106, India
| | - Ravi L Hadimani
- Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, 23285, USA
| | - Manoranjan Kar
- Department of Physics, Indian Institute of Technology-Patna, Patna, Bihar, 801106, India
| | - Vijaylakshmi Dayal
- Department of Physics, Maharaja Institute of Technology Mysore (Affiliated to Visvesvaraya Technological University, Belagavi), Mandya, 571477, Karnataka, India.
| | - T Niranjana Prabhu
- Department of Chemistry, Faculty of Mathematical and Physical Sciences, M S Ramaiah University of Applied Sciences, Bengaluru, 560058, India.
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Swathi BN, Krushna BRR, Manjula MV, Manjunatha K, Devaraja S, Ho MK, Chiu HH, Wu SY, Subramanian B, Nagabhushana H. Potential applications of Fe 3+-activated Sr 9Al 6O 18 nanophosphors for fingerprint detection, oxidative stress, and thrombosis treatment. BIOMATERIALS ADVANCES 2023; 151:213482. [PMID: 37267751 DOI: 10.1016/j.bioadv.2023.213482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/20/2023] [Accepted: 05/23/2023] [Indexed: 06/04/2023]
Abstract
This study reports on the synthesis of Fe3+-activated Sr9Al6O18 nanophosphors (SAO:Fe NPs) using a simple solution combustion process, which emits a pale green light and possesses excellent fluorescence properties. An in-situ powder dusting method was utilized to extract unique ridge features of latent fingerprints (LFPs) on various surfaces using ultra-violet 254 nm excitation. The results showed that SAO:Fe NPs possess high contrast, high sensitivity, and no background interference, enabling the observation of LFPs for longer periods. Poroscopy, which is the examination of sweat pores on the skin's papillary ridges, is important in the identification process, and the YOLOv8x program based on deep convolutional neural networks was used to study the features visible in FPs. The potential of SAO:Fe NPs to ameliorate oxidative stress and thrombosis was analyzed. The results showed that SAO:Fe NPs have antioxidant properties by scavenging 2,2-diphenylpicrylhydrazyl (DPPH) and normalized the stress markers in NaNO2-induced oxidative stress in Red Blood Cells (RBC). In addition, SAO:Fe inhibited platelet aggregation induced by adenosine diphosphate (ADP). Therefore, SAO:Fe NPs may have potential applications in advanced cardiology and forensic sciences. Overall, this study highlights the synthesis and potential applications of SAO:Fe NPs, which can enhance the sensitivity and specificity of fingerprint detection and provide insights into developing novel treatments for oxidative stress and thrombosis.
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Affiliation(s)
- B N Swathi
- Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572 103, India
| | - B R Radha Krushna
- Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572 103, India
| | - M V Manjula
- Department of Biochemistry, Kuvempu University, Shankaraghatta, Shimoga 577451, India
| | - K Manjunatha
- Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan.
| | - S Devaraja
- Department of Studies and Research in Biochemistry and Centre for Bioscience and Innovation, Tumkur University, Tumkur, Karnataka, India.
| | - Ming-Kang Ho
- Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan.
| | - Hsin-Hao Chiu
- Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan.
| | - Sheng Yun Wu
- Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan.
| | - Balanehru Subramanian
- School of Biomedical Sciences, Sri Balaji Vidyapeeth (Deemed to Be University), Puducherry 607402, India.
| | - H Nagabhushana
- Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572 103, India.
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Alenazi DA, AlSalem HS, Alhawiti AS, Binkadem MS, Abdulaziz H. Bukhari A, Alhadhrami NA, Alatawi RA, Abdullah Abomuti M. Development of strontium aluminate embedded photochromic cellulose hydrogel for mapping of fingermarks. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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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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Kalaburgi B, Radha Krushna B, Subramanian B, Daruka Prasad B, Manjunatha K, Yun Wu S, Shetty A, Nagabhushana H. Orange-red emitting MoO3:Sm3+ transparent nano-composite films for anti-counterfeiting and data secure applications. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.112031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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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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Mamatha G, Radha Krushna B, Malleshappa J, Subramanian B, Daruka Prasad B, Srikanth C, Nagabhushana H. Designing orange-red emitting luminescent platform for data security and information encryption based Sm3+ doped BLAO phosphor. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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