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- S, Vashishtha P, Gupta G, Vij A, Thakur A. UV/blue/green converted efficient red-NIR photoluminescence in Cr incorporated MgAl 2O 4nanocrystals: Site selective emission tailored through cation inversion and intrinsic defects. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 35:115303. [PMID: 36626847 DOI: 10.1088/1361-648x/acb1e9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The UV/Visible activated near-infrared (NIR) phosphors have many applications in solid state lighting, night vision devices and bio-imaging. The early research reported the red-NIR emitting phosphors doped with Cr3+centers upon visible light excitation. Here, in this work the intense red-NIR emission and color tuning is achieved for broad excitation range (UV/blue/green) through Cr dopant induced defect centers and cation inversionWe present the infuence of Cr dopant induced defect centers and cation inversion in Mg1-xCrxAl2O4(x= 0.5, 1, 3, 5 and 10 mol%) nanocrystals. The Cr3+doped MgAl2O4nanocrystals were synthesized by combustion method through stoichiometric substitution of Mg by Cr, while most of the Cr3+ions occupied the octahedral sites of spinel host with the formation of antisite defects, Cr3+clusters, magnesium and oxygen vacancies. These defect centers were probed through Rietveld refinement, PL, X-ray photoelectron and nuclear magnetic resonance spectra analyses. At UV excitation, the intrinsic defects played an interesting role in exhibiting the blue-violet emission attributed to host lattice defects and red-NIR emission attributed to strong/weak ligand field octahedral Cr3+sites, via charge transfer to Cr3+ions. The PL spectra evinced the enhanced red-NIR emission intensity upon 266 nm excitation than upon blue and green light excitation. Further, the weak ligand field site emission is found to be dominating with increase in doping concentration. Thus, Cr doped MgAl2O4nanocrystals showed their potency of exhibiting the intense red-NIR emission and color tuning (from red purple to bluish purple and then to red color) upon UV/blue/green excitation.
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Affiliation(s)
- Savita -
- Physics, Punjabi University, Advanced Materials Research Lab, Patiala, Punjab, 147002, INDIA
| | - Pargam Vashishtha
- NPL, Academy of Scientific & Innovative Research, (AcSIR), CSIR-HRDC campus, Ghaziabad-201 002, Uttar Pradesh, India, Sensor Devices & Metrology Group, CSIR-National Physical Laboratory (CSIR-NPL), Dr K S Krishnan Road, New Delhi, Delhi, 110 012, INDIA
| | - Govind Gupta
- CSIR-NPL, Sensor Devices & Metrology Group, CSIR-National Physical Laboratory (CSIR-NPL), Dr K S Krishnan Road, New Delhi, Delhi, 110 012, INDIA
| | - Ankush Vij
- Central University of Haryana, Department of Physics and Astrophysics, Central University of Haryana, Mahendergarh-123 031, India, Department of Physics, University of Petroleum and Energy Studies, Dehradun-248 007, Uttarakhand, India, Mahendragarh, Haryana, 123 001, INDIA
| | - Anup Thakur
- Physics, Punjabi University, Advanced Materials Research Lab, Patiala, 147002, INDIA
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2
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Sun X, Abdurahman R, Chu G, Yang Q, Yang T. Development of Ca
2+
, Cr
3+
Co‐Doped and Pr
3+
, Ca
2+
, Cr
3+
Tri‐Doped β‐Ga
2
O
3
Persistent Luminescence Nanoparticles with Enhanced Luminescence. ChemistrySelect 2022. [DOI: 10.1002/slct.202103640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xue‐Feng Sun
- Laboratory of Xinjiang Native Medicinal and Edible Plant Resources Chemistry College of Chemistry and Environmental Science Kashi University Kashi China
| | - Renagul Abdurahman
- Laboratory of Xinjiang Native Medicinal and Edible Plant Resources Chemistry College of Chemistry and Environmental Science Kashi University Kashi China
| | - Gang‐Hui Chu
- Laboratory of Xinjiang Native Medicinal and Edible Plant Resources Chemistry College of Chemistry and Environmental Science Kashi University Kashi China
| | - Qian‐Ting Yang
- Laboratory of Xinjiang Native Medicinal and Edible Plant Resources Chemistry College of Chemistry and Environmental Science Kashi University Kashi China
| | - Tong‐Sheng Yang
- Laboratory of Xinjiang Native Medicinal and Edible Plant Resources Chemistry College of Chemistry and Environmental Science Kashi University Kashi China
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3
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Alonso-Orts M, Carrasco D, San Juan JM, Nó ML, de Andrés A, Nogales E, Méndez B. Wide Dynamic Range Thermometer Based on Luminescent Optical Cavities in Ga 2 O 3 :Cr Nanowires. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2105355. [PMID: 34767304 DOI: 10.1002/smll.202105355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/14/2021] [Indexed: 06/13/2023]
Abstract
Remote temperature sensing at the micro- and nanoscale is key in fields such as photonics, electronics, energy, or biomedicine, with optical properties being one of the most used transducing mechanisms for such sensors. Ga2 O3 presents very high chemical and thermal stability, as well as high radiation resistance, becoming of great interest to be used under extreme conditions, for example, electrical and/or optical high-power devices and harsh environments. In this work, a luminescent and interferometric thermometer is proposed based on Fabry-Perot (FP) optical microcavities built on Cr-doped Ga2 O3 nanowires. It combines the optical features of the Cr3+ -related luminescence, greatly sensitive to temperature, and spatial confinement of light, which results in strong FP resonances within the Cr3+ broad band. While the chromium-related R lines energy shifts are adequate for low-temperature sensing, FP resonances extend the sensing range to high temperatures with excellent sensitivity. This thermometry system achieves micron-range spatial resolution, temperature precision of around 1 K, and a wide operational range, demonstrating to work at least in the 150-550 K temperature range. Besides, the temperature-dependent anisotropic refractive index and thermo-optic coefficient of this oxide have been further characterized by comparison to experimental, analytical, and finite-difference time-domain simulation results.
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Affiliation(s)
- Manuel Alonso-Orts
- Departamento Física de Materiales, Fac. CC Físicas, Universidad Complutense de Madrid, Madrid, 28040, Spain
| | - Daniel Carrasco
- Departamento Física de Materiales, Fac. CC Físicas, Universidad Complutense de Madrid, Madrid, 28040, Spain
| | - José M San Juan
- Departamento de Física, Facultad de Ciencias y Tecnología, Universidad del País Vasco, Apdo. 644, Bilbao, 48080, Spain
| | - María Luisa Nó
- Departamento de Física, Facultad de Ciencias y Tecnología, Universidad del País Vasco, Apdo. 644, Bilbao, 48080, Spain
| | - Alicia de Andrés
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco, Madrid, 28049, Spain
| | - Emilio Nogales
- Departamento Física de Materiales, Fac. CC Físicas, Universidad Complutense de Madrid, Madrid, 28040, Spain
| | - Bianchi Méndez
- Departamento Física de Materiales, Fac. CC Físicas, Universidad Complutense de Madrid, Madrid, 28040, Spain
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4
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Takezawa K, Lu J, Numako C, Takami S. One-step solvothermal synthesis and growth mechanism of well-crystallized β-Ga 2O 3 nanoparticles in isopropanol. CrystEngComm 2021. [DOI: 10.1039/d1ce00728a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Well-crystallized β-Ga2O3 nanoparticles were synthesized by solvothermal treatment of Ga(NO3)3 in isopropanol at 400 °C without performing the calcination process.
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Affiliation(s)
- Kengo Takezawa
- Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Jinfeng Lu
- EP Application Department, EP Business Unit, JEOL Ltd., 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan
| | - Chiya Numako
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoicho, Inage-ku, Chiba 263-8522, Japan
| | - Seiichi Takami
- Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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5
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Bai Q, Li P, Wang Z, Xu S, Li T, Yang Z, Xu Z. Inducing tunable host luminescence in Zn 2GeO 4 tetrahedral materials via doping Cr 3. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 199:179-188. [PMID: 29604607 DOI: 10.1016/j.saa.2018.03.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 03/18/2018] [Accepted: 03/23/2018] [Indexed: 06/08/2023]
Abstract
Zn2GeO4 consisting of tetrahedron, and it is a self-luminescent material due to the presence of the native defects and shows a bluish white emission excited by ultraviolet. Although Cr3+ doped in a tetrahedron generally cannot show luminescence, in this research, new defects are formed as Cr3+ doped in Zn2GeO4, hence a green emission band can be obtained. Meanwhile, the intensity of host emission is also decreased. Therefore, Zn2GeO4:Cr3+ are synthesized using a high-temperature solid-phase method. Thermoluminescence (TL) and luminescence decay curves are used to investigate the variation of native defects. The emission colour can be tuned from bluish white to green when Cr3+ doped in Zn2GeO4. This result has guidance for controlling the native emission of self-luminescent material.
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Affiliation(s)
- Qiongyu Bai
- Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University), Ministry of Education, Beijing 100044,China; Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044,China
| | - Panlai Li
- College of Physics Science & Technology, Hebei Key Lab of Optic-Electronic Information and Materials, Hebei University, Baoding 071002, China.
| | - Zhijun Wang
- College of Physics Science & Technology, Hebei Key Lab of Optic-Electronic Information and Materials, Hebei University, Baoding 071002, China
| | - Shuchao Xu
- College of Physics Science & Technology, Hebei Key Lab of Optic-Electronic Information and Materials, Hebei University, Baoding 071002, China
| | - Ting Li
- College of Physics Science & Technology, Hebei Key Lab of Optic-Electronic Information and Materials, Hebei University, Baoding 071002, China
| | - Zhiping Yang
- College of Physics Science & Technology, Hebei Key Lab of Optic-Electronic Information and Materials, Hebei University, Baoding 071002, China
| | - Zheng Xu
- Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University), Ministry of Education, Beijing 100044,China; Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044,China.
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6
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Berg NG, Pearce BL, Rohrbaugh N, Jiang L, Nolan MW, Ivanisevic A. Gallium containing composites as a tunable material to understand neuronal behavior under variable stiffness and radiation conditions. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:317-321. [PMID: 27987713 DOI: 10.1016/j.msec.2016.10.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 10/09/2016] [Accepted: 10/16/2016] [Indexed: 10/20/2022]
Abstract
We report a composite biomaterial containing nanostructured GaOOH and Matrigel™ that can be modulated with respect to its stiffness and radiosensitization properties. A variety of concentrations of GaOOH were added to the composite to alter the mechanical properties of the material as well as to tune the radiosensitizing properties to the composite. PC-12 cells were used to study the combined effects of different stimuli on cell behavior. NGF was given to the cells to record their morphology as well as viability. An increase in the substrate stiffness caused an increase in neurite outgrowth but a decrease in cell viability. In addition, increasing the radiation dose decreased neurite outgrowth but increased cell viability when radiosensitizing particles were present. A subtractive effect between radiosensitizing and mechanical stimuli was observed when PC-12 cells were grown on the GaOOH containing composite.
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Affiliation(s)
- Nora G Berg
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Brady L Pearce
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Nathaniel Rohrbaugh
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Lin Jiang
- Materials Science and Engineering, University of New South Wales, Sydney, Australia
| | - Michael W Nolan
- Department of Clinical Sciences (College of Veterinary Medicine), Comparative Medicine Institute, North Carolina State University, Raleigh, NC 27606, USA
| | - Albena Ivanisevic
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA.
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7
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Berg NG, Pearce BL, Snyder PJ, Rohrbaugh N, Nolan MW, Adhikari P, Khan SA, Ivanisevic A. Interfaces with Tunable Mechanical and Radiosensitizing Properties. ACS APPLIED MATERIALS & INTERFACES 2016; 8:21956-21961. [PMID: 26882455 DOI: 10.1021/acsami.5b11639] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report the fabrication of a composite containing nanostructured GaOOH and Matrigel with tunable radiosensitizing and stiffness properties. Composite characterization was done with microscopy and rheology. The utility of the interface was tested in vitro using fibroblasts. Cell viability and reactive oxygen species assays quantified the effects of radiation dosages and GaOOH concentrations. Fibroblasts' viability decreased with increasing concentration of GaOOH and composite stiffness. During ionizing radiation experiments the presence of the scintillating GaOOH triggered a different cellular response. Reactive oxygen species data demonstrated that one can reduce the amount of radiation needed to modulate the behavior of cells on interfaces with different stiffness containing a radiosensitizing material.
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Affiliation(s)
| | | | | | | | - Michael W Nolan
- Department of Clinical Sciences (College of Veterinary Medicine) and Comparative Medicine Institute, North Carolina State University , Raleigh, North Carolina 27606, United States
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8
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Li Y, Gecevicius M, Qiu J. Long persistent phosphors—from fundamentals to applications. Chem Soc Rev 2016; 45:2090-136. [DOI: 10.1039/c5cs00582e] [Citation(s) in RCA: 714] [Impact Index Per Article: 89.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We present multidisciplinary research on synthetic methods, afterglow mechanisms, characterization techniques, material kinds, and applications of long persistent phosphors.
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Affiliation(s)
- Yang Li
- State Key Laboratory of Luminescent Materials and Devices
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou
- China
| | - Mindaugas Gecevicius
- State Key Laboratory of Luminescent Materials and Devices
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou
- China
| | - Jianrong Qiu
- State Key Laboratory of Luminescent Materials and Devices
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou
- China
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