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Sarkar MI, Cinumon KV, Kumar K. Enhancement of photoacoustic and upconversion emission in Mg 2+/Zn 2+ codoped Gd 2O 3: Er 3+/Yb 3+ phosphor using 980 nm excitation. RSC Adv 2023; 13:21190-21198. [PMID: 37456545 PMCID: PMC10339069 DOI: 10.1039/d3ra03041e] [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: 05/07/2023] [Accepted: 07/03/2023] [Indexed: 07/18/2023] Open
Abstract
In this work, Er3+/Yb3+ doped Gd2O3 phosphor samples were synthesized through a combustion method and then characterized through X-ray diffraction and FE-SEM techniques. The sample was studied for photoacoustic spectroscopy (PAS) and upconversion (UC) emission spectroscopy techniques using a frequency modulated 980 nm excitation source. A correlation between PA signal (produced due to non-radiative transitions) and UC emission intensity (produced due to radiative transition) is made in order to optimize the sample for both these properties. The phosphor was codoped with Mg2+ and Zn2+ ions to see enhancement in upconversion emission intensity and these ions have enhanced the upconversion emission. Studies show that the present phosphor is appropriate for producing strong upconversion emission intensity along with a strong photoacoustic signal which is beneficial for upconversion-imaging as well as photothermal therapy. The present sample has also shown its potential for detection of fingerprints.
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Affiliation(s)
- Minarul I Sarkar
- Optical Materials & Bio-Imaging Research Laboratory, Department of Physics, Indian Institute of Technology (Indian School of Mines) Dhanbad Dhanbad 826004 India
| | - K V Cinumon
- Optical Materials & Bio-Imaging Research Laboratory, Department of Physics, Indian Institute of Technology (Indian School of Mines) Dhanbad Dhanbad 826004 India
| | - Kaushal Kumar
- Optical Materials & Bio-Imaging Research Laboratory, Department of Physics, Indian Institute of Technology (Indian School of Mines) Dhanbad Dhanbad 826004 India
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Varzandeh M, Labbaf S, Varshosaz J, Laurent S. An overview of the intracellular localization of high-Z nanoradiosensitizers. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2022; 175:14-30. [PMID: 36029849 DOI: 10.1016/j.pbiomolbio.2022.08.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 07/17/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
Radiation therapy (RT) is a method commonly used for cancer treatment worldwide. Commonly, RT utilizes two routes for combating cancers: 1) high-energy radiation to generate toxic reactive oxygen species (ROS) (through the dissociation of water molecules) for damaging the deoxyribonucleic acid (DNA) inside the nucleus 2) direct degradation of the DNA. However, cancer cells have mechanisms to survive under intense RT, which can considerably decrease its therapeutic efficacy. Excessive radiation energy damages healthy tissues, and hence, low doses are applied for cancer treatment. Additionally, different radiosensitizers were used to sensitize cancer cells towards RT through individual mechanisms. Following this route, nanoparticle-based radiosensitizers (herein called nanoradiosensitizers) have recently gained attention owing to their ability to produce massive electrons which leads to the production of a huge amount of ROS. The success of the nanoradiosensitizer effect is closely correlated to its interaction with cells and its localization within the cells. In other words, tumor treatment is affected from the chain of events which is started from cell-nanoparticle interaction followed by the nanoparticles direction and homing inside the cell. Therefore, passive or active targeting of the nanoradiosensitizers in the subcellular level and the cell-nano interaction would determine the efficacy of the radiation therapy. The importance of the nanoradiosensitizer's targeting is increased while the organelles beyond nucleus are recently recognized as the mediators of the cancer cell death or resistance under RT. In this review, the principals of cell-nanomaterial interactions and which dominate nanoradiosensitizer efficiency in cancer therapy, are thoroughly discussed.
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Affiliation(s)
- Mohammad Varzandeh
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Jaleh Varshosaz
- Novel Drug Delivery Systems Research Center and Department of Pharmaceutics, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Sophie Laurent
- Laboratory of NMR and Molecular Imaging, Department of General, Organic Chemistry and Biomedical, University of Mons, Mons, Belgium.
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Microwave-Assisted Preparation of Luminescent Inorganic Materials: A Fast Route to Light Conversion and Storage Phosphors. MOLECULES (BASEL, SWITZERLAND) 2021; 26:molecules26102882. [PMID: 34068050 PMCID: PMC8152507 DOI: 10.3390/molecules26102882] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 05/07/2021] [Accepted: 05/09/2021] [Indexed: 11/17/2022]
Abstract
Luminescent inorganic materials are used in several technological applications such as light-emitting displays, white LEDs for illumination, bioimaging, and photodynamic therapy. Usually, inorganic phosphors (e.g., complex oxides, silicates) need high temperatures and, in some cases, specific atmospheres to be formed or to obtain a homogeneous composition. Low ionic diffusion and high melting points of the precursors lead to long processing times in these solid-state syntheses with a cost in energy consumption when conventional heating methods are applied. Microwave-assisted synthesis relies on selective, volumetric heating attributed to the electromagnetic radiation interaction with the matter. The microwave heating allows for rapid heating rates and small temperature gradients yielding homogeneous, well-formed materials swiftly. Luminescent inorganic materials can benefit significantly from the microwave-assisted synthesis for high homogeneity, diverse morphology, and rapid screening of different compositions. The rapid screening allows for fast material investigation, whereas the benefits of enhanced homogeneity include improvement in the optical properties such as quantum yields and storage capacity.
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Zhou H, Fu R, Yang C, Ou M, Xue C. Influence of calcination temperature on the fluorescence and magnetic properties of Gd 2O 3:Tb 3+, K + nanoparticles. APPLIED OPTICS 2021; 60:3302-3307. [PMID: 33983232 DOI: 10.1364/ao.418490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 03/24/2021] [Indexed: 06/12/2023]
Abstract
Gd2O3:Tb3+ nanoparticles were synthesized by using diethylene glycol as a solvent and doped with 3 mol% K+ ions. Gd2O3:Tb3+, K+ nanoparticles were calcinated at 600°C, 700°C, 800°C, and 900°C and subjected to the analysis of x-ray diffractometer, transmission electron microscope, Fourier transform infrared spectrometer, fluorescence spectroscopy, and magnetization. The experimental results showed that as the calcination temperature increased from 600°C to 800°C, the morphology and particle size of the Gd2O3:Tb3+, K+ nanoparticles did not change significantly; whereas when the calcination temperature rose from 800°C to 900°C, the structure of Gd2O3 particles changed from cubic to monoclinic. As the temperature increased (below 800°C), the crystallinity of the cubic particles increased and the surface defects of the particles decreased, resulting in an increase in fluorescence intensity. For the monoclinic particles, the fluorescence intensity was significantly decreased and the magnetization was increased. The measured magnetic results confirmed the good paramagnetism of the synthesized nanoparticles.
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Kamińska I, Wosztyl A, Kowalik P, Sikora B, Wojciechowski T, Sobczak K, Minikayev R, Zajdel K, Chojnacki M, Zaleszczyk W, Łysiak K, Paszkowicz W, Szczytko J, Frontczak-Baniewicz M, Stryczniewicz W, Fronc K. Synthesis and characterization of Gd 2O 3: Er 3+, Yb 3+doped with Mg 2+, Li +ions-effect on the photoluminescence and biological applications. NANOTECHNOLOGY 2021; 32:245705. [PMID: 33690193 DOI: 10.1088/1361-6528/abed02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
Gd2O3:1% Er3+, 18% Yb3+,x% Mg2+(x = 0; 2.5; 4; 5; 6; 8;10; 20; 25; 50) and Gd2O3:1% Er3+, 18% Yb3+, 2,5% Mg2+,y% Li+(y = 0.5-2.5) nanoparticles were synthesized by homogenous precipitation method and calcined at 900 °C for 3 h in air atmosphere. Powder x-ray diffraction, scanning electron microscopy, cathodoluminescence, transmission electron microscopy, energy dispersive x-ray spectroscopy and photoluminescence techniques were employed to characterize the obtained nanoparticles. We observed a 8-fold increase in red luminescence for samples suspended in DMSO solution for 2.5% of Mg2+doping. The x-ray analysis shows that for the concentration of 2.5% Mg, the size of the crystallites in the NPs is the largest, which is mainly responsible for the increase in the intensity of the upconversion luminescence. But the addition of Li+ions did not improve the luminescence of the upconversion due to decreasing of crystallites size of the NPs. Synthesized nanomaterials with very effective upconverting luminescence, can act as luminescent markers inin vivoimaging. The cytotoxicity of the nanoparticles was evaluated on the 4T1 cell line for the first time.
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Affiliation(s)
- Izabela Kamińska
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Aleksandra Wosztyl
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, 02-093, Poland
| | - Przemysław Kowalik
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Bożena Sikora
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Tomasz Wojciechowski
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
- International Research Centre MagTop, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Kamil Sobczak
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, Warsaw 02-089, Poland
| | - Roman Minikayev
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Karolina Zajdel
- Mossakowski Medical Research Centre, Polish Academy of Sciences, Pawińskiego 5, Warsaw 02-106, Poland
| | - Michał Chojnacki
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Wojciech Zaleszczyk
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
- International Research Centre MagTop, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Katarzyna Łysiak
- Faculty of Physics, University of Warsaw, Ludwika Pasteura 5, 02-093, Poland
| | - Wojciech Paszkowicz
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, 02-093, Poland
| | | | - Wit Stryczniewicz
- Łukasiewicz Research Network-Institute of Aviation, al. Krakowska 110/114, Warsaw 02-256, Poland
| | - Krzysztof Fronc
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
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Kamińska I, Jankowski D, Sikora B, Kowalik P, Minikayev R, Wojciechowski T, Chojnacki M, Sobczak K, Rybusiński J, Szczytko J, Zajdel K, Suchocki A, Paszkowicz W, Frontczak-Baniewicz M, Fronc K. Structural, optical and magnetic properties of Y 3-0.02-xEr 0.02Yb x Al 5O 12 (0 < x < 0.20) nanocrystals: effect of Yb content. NANOTECHNOLOGY 2020; 31:225711. [PMID: 32032002 DOI: 10.1088/1361-6528/ab73b9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The paramagnetic Y3-0.02-x Er0.02Yb x Al5O12 (x = 0.02, 0.06, 0.10, 0.12, 0.18, 0.20) nanocrystals (NCs) were synthesized by the microwave-induced solution combustion method. The XRD, TEM and SEM techniques were applied to determine the NCs' structures and sizes. The XRD patterns confirmed that the NCs have for the most part a regular structure of the Y3Al5O12 (YAG) phase. The changes of the distance between donor Yb3+ (sensitizer) and acceptor Er3+ (activator) were realized by changing the donor's concentration with a constant amount of acceptor. Under 980 nm excitation, at room temperature, the NCs exhibited strong red emission near 660 and 675 nm, and green upconversion emission at 550 nm, corresponding to the intra 4f transitions of Er3+ (4F9/2, 2H11/2, 4S3/2) → Er3+ (4I15/2). The strongest emission was observed in a sample containing 18% Yb3+ ions. The red and green emission intensities are respectively about 5 and 12 times higher as compared to NCs doped with 2% of Yb3+. In order to prove that the main factor responsible for the increase of the upconversion luminescence efficiency is reduction of the distance between Yb3+ and Er3+, we examined, for the first time the influence of hydrostatic pressure on luminescence and luminescence decay time of the radiative transitions inside donor ion. The decrease of both luminescence intensity and luminescence decay times, with increasing hydrostatic pressure was observed. After applying hydrostatic pressure to samples with e.g. 2% and 6% Yb3+, the distance between the donor and acceptor decreases. However, for higher concentrations of the donor, this distance is smaller, and this leads to the effective energy transfer to Er3+ ions. With increasing pressure, the maximum intensity of near infrared emission is observed at 1029, 1038 and 1047 nm, what corresponds to 2F5/2 → 2F7/2 transition of Yb3+.
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Affiliation(s)
- Izabela Kamińska
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Dawid Jankowski
- Research Foundation Baltic Institute of Technology, al. Zwycięstwa 96/98, 81-451 Gdynia, Poland
| | - Bożena Sikora
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Przemysław Kowalik
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Roman Minikayev
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Tomasz Wojciechowski
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
- International Research Centre MagTop, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Michał Chojnacki
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Kamil Sobczak
- University of Warsaw Biological and Chemical Research Centre, Żwirki i Wigury 101, Warsaw 02-089, Poland
| | - Jarosław Rybusiński
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
| | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
| | - Karolina Zajdel
- Mossakowski Medical Research Centre Polish Academy of Sciences, Pawińskiego 5, Warsaw 02-106, Poland
| | - Andrzej Suchocki
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
- Institute of Physics, Kazimierz Wielki University, Weyssenhoffa 11, 85-072, Bydgoszcz, Poland
| | - Wojciech Paszkowicz
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | | | - Krzysztof Fronc
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
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Carlos E, Martins R, Fortunato E, Branquinho R. Solution Combustion Synthesis: Towards a Sustainable Approach for Metal Oxides. Chemistry 2020; 26:9099-9125. [DOI: 10.1002/chem.202000678] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Indexed: 12/26/2022]
Affiliation(s)
- Emanuel Carlos
- Materials Science DepartmentCENIMAT/i3N, Faculdade de Ciências e Tecnologia (FCT)Universidade NOVA de Lisboa (UNL) and CEMOP/UNINOVA 2829-516 Caparica Portugal
| | - Rodrigo Martins
- Materials Science DepartmentCENIMAT/i3N, Faculdade de Ciências e Tecnologia (FCT)Universidade NOVA de Lisboa (UNL) and CEMOP/UNINOVA 2829-516 Caparica Portugal
| | - Elvira Fortunato
- Materials Science DepartmentCENIMAT/i3N, Faculdade de Ciências e Tecnologia (FCT)Universidade NOVA de Lisboa (UNL) and CEMOP/UNINOVA 2829-516 Caparica Portugal
| | - Rita Branquinho
- Materials Science DepartmentCENIMAT/i3N, Faculdade de Ciências e Tecnologia (FCT)Universidade NOVA de Lisboa (UNL) and CEMOP/UNINOVA 2829-516 Caparica Portugal
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Yadav R, Monika, Rai S, Dhoble S. Recent advances on morphological changes in chemically engineered rare earth doped phosphor materials. PROG SOLID STATE CH 2020. [DOI: 10.1016/j.progsolidstchem.2019.100267] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Monika M, Yadav RS, Bahadur A, Rai SB. Concentration and pump power-mediated color tunability, optical heating and temperature sensing via TCLs of red emission in an Er3+/Yb3+/Li+ co-doped ZnGa2O4 phosphor. RSC Adv 2019; 9:40092-40108. [PMID: 35541369 PMCID: PMC9076210 DOI: 10.1039/c9ra09120c] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 11/18/2019] [Indexed: 12/24/2022] Open
Abstract
The Er3+/Yb3+/Li+ co-doped ZnGa2O4 phosphor gives intense red upconversion photoluminescence, color tunability with Er3+ ion concentration and incident pump power, R/G ratio, induced optical heating and temperature sensing characteristics.
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Affiliation(s)
- Monika Monika
- Laser & Spectroscopy Laboratory
- Department of Physics
- Institute of Science
- Banaras Hindu University
- Varanasi 221005
| | - Ram Sagar Yadav
- Department of Zoology
- Institute of Science
- Banaras Hindu University
- Varanasi 221005
- India
| | - Amresh Bahadur
- Laser & Spectroscopy Laboratory
- Department of Physics
- Institute of Science
- Banaras Hindu University
- Varanasi 221005
| | - Shyam Bahadur Rai
- Laser & Spectroscopy Laboratory
- Department of Physics
- Institute of Science
- Banaras Hindu University
- Varanasi 221005
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Choudhary AK, Singh SK, Dwivedi A, Bahadur A, Rai SB. Enhanced upconversion emission of Er 3+/Yb 3+ and Er 3+/Yb 3+/Zn 2+ doped calcium aluminate for use in optical thermometry and laser induced optical heating. Methods Appl Fluoresc 2018; 6:035014. [PMID: 29848806 DOI: 10.1088/2050-6120/aac8f9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
There are two key factors to design an efficient green upconversion (UC) emission based optical sensor for temperature. The primary need is to develop a thermally stable and economical material, for a stable sensor, and the second essence is to get an efficient green UC emission, for high sensitivity of the sensor. The proof of this concept is demonstrated on a model system CaAl2O4: Er3+, co-doped with Yb3+ and Zn2+. UC emission of Er3+ ion is enhanced, primarily, through co-operative energy transfer from Yb3+ to Er3+ ions. Secondly, we prove that, incorporation of Zn2+ ions alters local crystal field environment around Er3+ ions which causes an enhancement in green UC emission. The variation in intensity ratio of 2H11/2 → 4I15/2 (green) and 4S3/2 → 4I15/2 (green) transitions with temperature is studied to report the sensing property. We show that, sensitivity becomes better with an increase in UC efficiency and the best sensitivity is attained for CaAl(0.793)2Er0.007Yb0.05Zn0.15O4 sample, ∼0.0154 K-1 at 308 K. The obtained result is compared with other works and implies its better suitability. Further, the laser induced optical heating is also observed. The laser induced optical heating has been observed experimentally at 400 K above 1 W laser power. This has been further verified by theoretical justification of heating at various pump powers.
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Affiliation(s)
- A K Choudhary
- Department of Physics, Banaras Hindu University, Varanasi 221005, India
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Mondal M, Rai VK. An effective way to enhance upconversion emission and temperature sensing via Zn 2+ incorporation in Er 3+ -Yb 3+ :YMoO 4 nanophosphors. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2017.10.043] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yadav M, Mondal M, Mukhopadhyay L, Rai VK. Intense blue upconversion emission and intrinsic optical bistability in Tm3+/Yb3+/Zn2+tridoped YVO4phosphors. Methods Appl Fluoresc 2018; 6:025001. [DOI: 10.1088/2050-6120/aa9e46] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Kamińska I, Elbaum D, Sikora B, Kowalik P, Mikulski J, Felcyn Z, Samol P, Wojciechowski T, Minikayev R, Paszkowicz W, Zaleszczyk W, Szewczyk M, Konopka A, Gruzeł G, Pawlyta M, Donten M, Ciszak K, Zajdel K, Frontczak-Baniewicz M, Stępień P, Łapiński M, Wilczyński G, Fronc K. Single-step synthesis of Er 3+ and Yb 3+ ions doped molybdate/Gd 2O 3 core-shell nanoparticles for biomedical imaging. NANOTECHNOLOGY 2018; 29:025702. [PMID: 29130898 DOI: 10.1088/1361-6528/aa9974] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nanostructures as color-tunable luminescent markers have become major, promising tools for bioimaging and biosensing. In this paper separated molybdate/Gd2O3 doped rare earth ions (erbium, Er3+ and ytterbium, Yb3+) core-shell nanoparticles (NPs), were fabricated by a one-step homogeneous precipitation process. Emission properties were studied by cathodo- and photoluminescence. Scanning electron and transmission electron microscopes were used to visualize and determine the size and shape of the NPs. Spherical NPs were obtained. Their core-shell structures were confirmed by x-ray diffraction and energy-dispersive x-ray spectroscopy measurements. We postulated that the molybdate rich core is formed due to high segregation coefficient of the Mo ion during the precipitation. The calcination process resulted in crystallization of δ/ξ (core/shell) NP doped Er and Yb ions, where δ-gadolinium molybdates and ξ-molybdates or gadolinium oxide. We confirmed two different upconversion mechanisms. In the presence of molybdenum ions, in the core of the NPs, Yb3+-[Formula: see text] (∣2F7/2, 3T2〉) dimers were formed. As a result of a two 980 nm photon absorption by the dimer, we observed enhanced green luminescence in the upconversion process. However, for the shell formed by the Gd2O3:Er, Yb NPs (without the Mo ions), the typical energy transfer upconversion takes place, which results in red luminescence. We demonstrated that the NPs were transported into cytosol of the HeLa and astrocytes cells by endocytosis. The core-shell NPs are sensitive sensors for the environment prevailing inside (shorter luminescence decay) and outside (longer luminescence decay) of the tested cells. The toxicity of the NPs was examined using MTT assay.
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Affiliation(s)
- Izabela Kamińska
- Institute of Physics Polish Academy of Sciences, al Lotników 32/46, Warsaw 02-668, Poland
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Yadav RS, Dhoble SJ, Rai SB. Improved photon upconversion photoluminescence and intrinsic optical bistability from a rare earth co-doped lanthanum oxide phosphor via Bi3+ doping. NEW J CHEM 2018. [DOI: 10.1039/c8nj01091a] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An Er3+, Yb3+, Bi3+ co-doped La2O3 phosphor shows upconverted emission and intrinsic optical bistability properties.
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Affiliation(s)
- R. S. Yadav
- Laser & Spectroscopy Laboratory
- Department of Physics
- Institute of Science Banaras Hindu University
- Varanasi 221 005
- India
| | - S. J. Dhoble
- Department of Physics
- R.T.M. Nagpur University
- Nagpur 440033
- India
| | - S. B. Rai
- Laser & Spectroscopy Laboratory
- Department of Physics
- Institute of Science Banaras Hindu University
- Varanasi 221 005
- India
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Choudhary AK, Dwivedi A, Bahadur A, Rai SB. Effect of the concentration of the dopants (Er 3+, Yb 3+ and Zn 2+) and temperature on the upconversion emission behavior of Er 3+/Yb 3+ co-doped SrAl 2O 4 phosphor. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 185:155-162. [PMID: 28570986 DOI: 10.1016/j.saa.2017.05.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Revised: 05/05/2017] [Accepted: 05/16/2017] [Indexed: 06/07/2023]
Abstract
Er3+/Yb3+ co-doped SrAl2O4 (SRA: Er3+, Yb3+) phosphor has been synthesized by high temperature solid state reaction technique. The pure phase formation has been confirmed by X-ray diffraction (XRD) measurements. The surface morphology is studied by scanning electron microscopy (SEM) technique. The FTIR measurements give the information of vibrational bands arising due to sample. The intense UC emission from SRA: Er3+, Yb3+ phosphor has been monitored on excitation with 980nm diode laser. The SRA: Er3+, Yb3+ samples prepared at 1473K show a dominant green emission. On the other hand it shows dominant red emission when the sample is heated to 1623K. Variation of concentration of Er3+ and Yb3+ ions in SRA: Er3+, Yb3+ phosphor suggests two possible mechanisms involved in UC emission process viz. cross relaxation (CR) process and energy back transfer (EBT) process, respectively. The cross relaxation mechanism seems to play a major role. The UC emission efficiency is enhanced several times on co-doping of Zn2+ ion replacing Al3+ or Sr2+ in SRA: Er3+, Yb3+ phosphor sample. The color of the UC emission can be tuned from green to red region by varying the concentration of zinc.
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Affiliation(s)
- Ajay Kumar Choudhary
- Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India
| | - A Dwivedi
- Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India
| | - A Bahadur
- Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India
| | - S B Rai
- Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India.
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16
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Kowalik P, Elbaum D, Mikulski J, Fronc K, Kamińska I, Morais PC, Eduardo de Souza P, Nunes RB, Veiga-Souza FH, Gruzeł G, Minikayev R, Wojciechowski T, Mosiniewicz-Szablewska E, Szewczyk M, Pawlyta M, Sienkiewicz A, Łapiński M, Zajdel K, Stępień P, Szczepkowski J, Jastrzębski W, Frontczak-Baniewicz M, Paszkowicz W, Sikora B. Upconversion fluorescence imaging of HeLa cells using ROS generating SiO2-coated lanthanide-doped NaYF4 nanoconstructs. RSC Adv 2017. [DOI: 10.1039/c6ra25383k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Multicolor upconversion of SiO2-coated nanoparticles using for cells imaging and reactive oxygen species generation.
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17
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Varma A, Mukasyan AS, Rogachev AS, Manukyan KV. Solution Combustion Synthesis of Nanoscale Materials. Chem Rev 2016; 116:14493-14586. [PMID: 27610827 DOI: 10.1021/acs.chemrev.6b00279] [Citation(s) in RCA: 273] [Impact Index Per Article: 34.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Solution combustion is an exciting phenomenon, which involves propagation of self-sustained exothermic reactions along an aqueous or sol-gel media. This process allows for the synthesis of a variety of nanoscale materials, including oxides, metals, alloys, and sulfides. This Review focuses on the analysis of new approaches and results in the field of solution combustion synthesis (SCS) obtained during recent years. Thermodynamics and kinetics of reactive solutions used in different chemical routes are considered, and the role of process parameters is discussed, emphasizing the chemical mechanisms that are responsible for rapid self-sustained combustion reactions. The basic principles for controlling the composition, structure, and nanostructure of SCS products, and routes to regulate the size and morphology of the nanoscale materials are also reviewed. Recently developed systems that lead to the formation of novel materials and unique structures (e.g., thin films and two-dimensional crystals) with unusual properties are outlined. To demonstrate the versatility of the approach, several application categories of SCS produced materials, such as for energy conversion and storage, optical devices, catalysts, and various important nanoceramics (e.g., bio-, electro-, magnetic), are discussed.
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Affiliation(s)
- Arvind Varma
- School of Chemical Engineering, Purdue University , West Lafayette, Indiana 47907, United States
| | | | - Alexander S Rogachev
- Institute of Structural Macrokinetics and Materials Science, RAS , Chernogolovka 142432, Russia.,National University of Science and Technology, MISiS , Moscow 119049, Russia
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18
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Bazylińska U, Wawrzyńczyk D, Kulbacka J, Frąckowiak R, Cichy B, Bednarkiewicz A, Samoć M, Wilk KA. Polymeric nanocapsules with up-converting nanocrystals cargo make ideal fluorescent bioprobes. Sci Rep 2016; 6:29746. [PMID: 27406954 PMCID: PMC4942829 DOI: 10.1038/srep29746] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 06/23/2016] [Indexed: 12/23/2022] Open
Abstract
An innovative approach for up-converting nanoparticles adaptation for bio-related and theranostic applications is presented. We have successfully encapsulated multiple, ~8 nm in size NaYF4 nanoparticles inside the polymeric nanocarriers with average size of ~150 nm. The initial coating of nanoparticles surfaces was preserved due to the hydrophobic environment inside the nanocapsules, and thus no single nanoparticle surface functionalization was necessary. The selection of biodegradable and sugar-based polyelectrolyte shells ensured biocompatibility of the nanostructures, while the choice of Tm3+ and Yb3+ NaYF4 nanoparticles co-doping allowed for near-infrared to near-infrared bioimaging of healthy and cancerous cell lines. The protective role of organic shell resulted in not only preserved high up-converted emission intensity and long luminescence lifetimes, without quenching from water environment, but also ensured low cytotoxicity and high cellular uptake of the engineered nanocapsules. The multifunctionality of the proposed nanocarriers is a consequence of both the organic exterior part that is accessible for conjugation with biologically important molecules, and the hydrophobic interior, which in future application may be used as a container for co-encapsulation of inorganic nanoparticles and anticancer drug cargo.
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Affiliation(s)
- U Bazylińska
- Department of Organic and Pharmaceutical Technology, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland
| | - D Wawrzyńczyk
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland
| | - J Kulbacka
- Department of Medical Biochemistry, Wroclaw Medical University, Chałubińskiego 10, 50-368 Wroclaw, Poland
| | - R Frąckowiak
- Department of Organic and Pharmaceutical Technology, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland
| | - B Cichy
- Institute of Low Temperature and Structure Research, PAS, Okólna 2, 50-422 Wroclaw, Poland
| | - A Bednarkiewicz
- Institute of Low Temperature and Structure Research, PAS, Okólna 2, 50-422 Wroclaw, Poland.,Wroclaw Research Center EIT+, Stablowicka 147, 54-066 Wroclaw, Poland
| | - M Samoć
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland
| | - K A Wilk
- Department of Organic and Pharmaceutical Technology, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland
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