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Isikawa M, Guidelli E. Microfluidic Synthesis of Theranostic Nanoparticles with Near-Infrared Scintillation: Toward Next-Generation Dosimetry in X-ray-Induced Photodynamic Therapy. ACS APPLIED MATERIALS & INTERFACES 2022; 14:324-336. [PMID: 34963048 DOI: 10.1021/acsami.1c20689] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We developed a microfluidic synthesis to grow GdF3:Eu theranostic scintillating nanoparticles to simultaneously monitor the X-ray dose delivered to tumors during treatments with X-ray activated photodynamic therapy (X-PDT). The flow reaction was optimized to enhance scintillation emission from the Eu3+ ions. The as-prepared ∼15 nm rhombohedral-shaped nanoparticles self-assembled into ∼100 nm mesoporous flower-like nanostructures, but the rhombohedral units remained intact and the scintillation spectra unaltered. The conjugation of the ScNPs with multilayers of methylene blue (MB) in a core-shell structure (GdF@MB) resulted in enhanced singlet oxygen (1O2) generation under X-ray irradiation, with maximum 1O2 production for nanoparticles with 4 MB layers (GdF@4MB). High 1O2 yield was further evidenced in cytotoxicity assays, demonstrating complete cell death only for the association of ScNPs with MB and X-rays. Because the scintillating Eu3+ emission at 694 nm is within the therapeutic window and was only partially absorbed by the MB molecules, it was explored for getting in vivo dosimetric information. Using porcine skin and fat to simulate the optical and radiological properties of the human tissues, we showed that the scintillation light can be detected for a tissue layer of ∼16 mm, thick enough to be employed in radiotherapy treatments of breast cancers, for instance. Therefore, the GdF3:Eu ScNPs and the GdF@4MB nanoconjugates are strong candidates for treating cancer with X-PDT while monitoring the treatment and the radiation dose delivered, opening new avenues to develop a next-generation modality of real-time in vivo dosimetry.
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Affiliation(s)
- Mileni Isikawa
- Departamento de Física. FFCLRP- Universidade de São Paulo, Ribeirão Preto, SP 14040-901, Brazil
| | - Eder Guidelli
- Departamento de Física. FFCLRP- Universidade de São Paulo, Ribeirão Preto, SP 14040-901, Brazil
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2
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Singh S, Kanika, Kedawat G, Park JH, Ghorai B, Ghorai UK, Upadhyay C, Kaipparettu BA, Gupta BK. Frequency upconversion, paramagnetic behavior and biocompatibility of Gd2O3:Er3+/Yb3+ nanorods. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2021. [DOI: 10.1016/j.jpap.2021.100081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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3
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Urner LH, Goltsche K, Selent M, Liko I, Schweder M, Robinson CV, Pagel K, Haag R. Dendritic Oligoglycerol Regioisomer Mixtures and Their Utility for Membrane Protein Research. Chemistry 2021; 27:2537-2542. [PMID: 33026114 PMCID: PMC7898920 DOI: 10.1002/chem.202003991] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/06/2020] [Indexed: 12/14/2022]
Abstract
Dendrons are an important class of macromolecules that can be used for a broad range of applications. Recent studies have indicated that mixtures of oligoglycerol detergent (OGD) regioisomers are superior to individual regioisomers for protein extraction. The origin of this phenomenon remains puzzling. Here we discuss the synthesis and characterization of dendritic oligoglycerol regioisomer mixtures and their implementation into detergents. We provide experimental benchmarks to support quality control after synthesis and investigate the unusual utility of OGD regioisomer mixtures for extracting large protein quantities from biological membranes. We anticipate that our findings will enable the development of mixed detergent platforms in the future.
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Affiliation(s)
- Leonhard H. Urner
- Institute of Chemistry and BiochemistryFreie Universität BerlinTakustraße 314195BerlinGermany
| | - Katharina Goltsche
- Institute of Chemistry and BiochemistryFreie Universität BerlinTakustraße 314195BerlinGermany
| | - Marleen Selent
- Institute of Chemistry and BiochemistryFreie Universität BerlinTakustraße 314195BerlinGermany
| | - Idlir Liko
- Physical and Theoretical Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxfordOX1 3QZUK
| | - Marc‐Philip Schweder
- Institute of Chemistry and BiochemistryFreie Universität BerlinTakustraße 314195BerlinGermany
| | - Carol V. Robinson
- Physical and Theoretical Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxfordOX1 3QZUK
| | - Kevin Pagel
- Institute of Chemistry and BiochemistryFreie Universität BerlinTakustraße 314195BerlinGermany
| | - Rainer Haag
- Institute of Chemistry and BiochemistryFreie Universität BerlinTakustraße 314195BerlinGermany
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4
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Singh S, Ghorai B, Kumar Yadav P, Kumar Ghorai U, Upadhyay C, Gupta BK. Probing into Bifunctional Luminomagnetic Upconverting Nanorods for External Magnetic Tracking Applications. ChemistrySelect 2020. [DOI: 10.1002/slct.202003159] [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)
- Satbir Singh
- Photonic Materials Metrology Sub Division, Advanced Materials and Device Metrology Division CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg New Delhi 110012 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Biswajit Ghorai
- Department of Industrial Chemistry & Applied Chemistry, Swami Vivekananda Research centre Ramakrishna Mission Vidyamandira, Belur Math Howrah 711202 India
| | - Pramod Kumar Yadav
- School of Materials Science and Technology Indian Institute of Technology (Banaras Hindu University) Varanasi 221005 India
| | - Uttam Kumar Ghorai
- Department of Industrial Chemistry & Applied Chemistry, Swami Vivekananda Research centre Ramakrishna Mission Vidyamandira, Belur Math Howrah 711202 India
| | - Chandan Upadhyay
- School of Materials Science and Technology Indian Institute of Technology (Banaras Hindu University) Varanasi 221005 India
| | - Bipin Kumar Gupta
- Photonic Materials Metrology Sub Division, Advanced Materials and Device Metrology Division CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg New Delhi 110012 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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Chuang YC, Chu CH, Cheng SH, Liao LD, Chu TS, Chen NT, Paldino A, Hsia Y, Chen CT, Lo LW. Annealing-modulated nanoscintillators for nonconventional X-ray activation of comprehensive photodynamic effects in deep cancer theranostics. Theranostics 2020; 10:6758-6773. [PMID: 32550902 PMCID: PMC7295068 DOI: 10.7150/thno.41752] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 05/04/2020] [Indexed: 01/10/2023] Open
Abstract
Photodynamic therapy (PDT), which involves the generation of reactive oxygen species (ROS) through interactions of a photosensitizer (PS) with light and oxygen, has been applied in oncology. Over the years, PDT techniques have been developed for the treatment of deep-seated cancers. However, (1) the tissue penetration limitation of excitation photon, (2) suppressed efficiency of PS due to multiple energy transfers, and (3) insufficient oxygen source in hypoxic tumor microenvironment still constitute major challenges facing the clinical application of PDT for achieving effective treatment. We present herein a PS-independent, ionizing radiation-induced PDT agent composed of yttrium oxide nanoscintillators core and silica shell (Y2O3:Eu@SiO2) with an annealing process. Our results revealed that annealed Y2O3:Eu@SiO2 could directly induce comprehensive photodynamic effects under X-ray irradiation without the presence of PS molecules. The crystallinity of Y2O3:Eu@SiO2 was demonstrated to enable the generation of electron-hole (e--h+) pairs in Y2O3 under ionizing irradiation, giving rise to the formation of ROS including superoxide, hydroxyl radical and singlet oxygen. In particular, combining Y2O3:Eu@SiO2 with fractionated radiation therapy increased radio-resistant tumor cell damage. Furthermore, photoacoustic imaging of tumors showed re-distribution of oxygen saturation (SO2) and reoxygenation of the hypoxia region. The results of this study support applicability of the integration of fractionated radiation therapy with Y2O3:Eu@SiO2, achieving synchronously in-depth and oxygen-insensitive X-ray PDT. Furthermore, we demonstrate Y2O3:Eu@SiO2 exhibited radioluminescence (RL) under X-ray irradiation and observed the virtually linear correlation between X-ray-induced radioluminescence (X-RL) and the Y2O3:Eu@SiO2 concentration in vivo. With the pronounced X-RL for in-vivo imaging and dosimetry, it possesses significant potential for utilization as a precision theranostics producing highly efficient X-ray PDT for deep-seated tumors.
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Rekha S, Anila EI. Green Emitting Cerium Doped CaS Whiskers Grown by Solid State Diffusion Method. J Fluoresc 2018; 28:1029-1036. [PMID: 30014274 DOI: 10.1007/s10895-018-2266-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 07/09/2018] [Indexed: 11/28/2022]
Abstract
Undoped and cerium doped Calcium sulfide (CaS) phosphors were synthesized using solid state diffusion method. The X-ray diffraction pattern revealed that both undoped and doped CaS crystallites have cubic structure with average crystallite size varying from 20 to 30 nm. Scanning electron micrographs indicated that Ce doped CaS phosphors were composed of whiskers with different dimensions and orientations. The optical properties of undoped and Ce doped particles were characterized using Photoluminescence (PL) and UV-Vis absorption spectroscopy. The PL emission spectrum of cerium doped CaS phosphors for an excitation wavelength 465 nm showed a main peak at 500 nm and a shoulder peak at 556 nm due to 5d → 4f transition in Ce3+ ions. The variation of PL intensity with cerium concentration was investigated and the maximum PL intensity was obtained for a doping concentration of 3 wt.%. The optical band gap of the samples was estimated from the diffuse reflectance spectrum and was found to increase with increase in cerium concentration. The enhanced optical properties of these phosphors can be exploited in various optoelectronic devices including displays and bioimaging techniques.
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Affiliation(s)
- S Rekha
- Optoelectronic and Nanomaterials' Research Laboratory, Department of Physics, Union Christian College, Aluva, Kerala, 683102, India.,Department of Physics, Maharaja's College, Ernakulam, Kerala, India
| | - E I Anila
- Optoelectronic and Nanomaterials' Research Laboratory, Department of Physics, Union Christian College, Aluva, Kerala, 683102, India.
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Khan FA, Akhtar S, Almofty SA, Almohazey D, Alomari M. FMSP-Nanoparticles Induced Cell Death on Human Breast Adenocarcinoma Cell Line (MCF-7 Cells): Morphometric Analysis. Biomolecules 2018; 8:biom8020032. [PMID: 29882888 PMCID: PMC6022976 DOI: 10.3390/biom8020032] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 05/13/2018] [Accepted: 05/15/2018] [Indexed: 12/15/2022] Open
Abstract
Currently, breast cancer treatment mostly revolves around radiation therapy and surgical interventions, but often these treatments do not provide satisfactory relief to the patients and cause unmanageable side-effects. Nanomaterials show promising results in treating cancer cells and have many advantages such as high biocompatibility, bioavailability and effective therapeutic capabilities. Interestingly, fluorescent magnetic nanoparticles have been used in many biological and diagnostic applications, but there is no report of use of fluorescent magnetic submicronic polymer nanoparticles (FMSP-nanoparticles) in the treatment of human breast cancer cells. In the present study, we tested the effect of FMSP-nanoparticles on human breast cancer cells (MCF-7). We tested different concentrations (1.25, 12.5 and 50 µg/mL) of FMSP-nanoparticles in MCF-7 cells and evaluated the nanoparticles response morphometrically. Our results revealed that FMSP-nanoparticles produced a concentration dependent effect on the cancer cells, a dose of 1.25 µg/mL produced no significant effect on the cancer cell morphology and cell death, whereas dosages of 12.5 and 50 µg/mL resulted in significant nuclear augmentation, disintegration, chromatic condensation followed by dose dependent cell death. Our results demonstrate that FMSP-nanoparticles induce cell death in MCF-7 cells and may be a potential anti-cancer agent for breast cancer treatment.
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Affiliation(s)
- Firdos Alam Khan
- Department of Stem Cell Biology, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Post Box No. 1982, Dammam 31441, Saudi Arabia.
| | - Sultan Akhtar
- Department of Biophysics, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Post Box No. 1982, Dammam 31441, Saudi Arabia.
| | - Sarah Ameen Almofty
- Department of Stem Cell Biology, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Post Box No. 1982, Dammam 31441, Saudi Arabia.
| | - Dana Almohazey
- Department of Stem Cell Biology, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Post Box No. 1982, Dammam 31441, Saudi Arabia.
| | - Munthar Alomari
- Department of Stem Cell Biology, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Post Box No. 1982, Dammam 31441, Saudi Arabia.
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8
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Kumar P, Nagpal K, Gupta BK. Unclonable Security Codes Designed from Multicolor Luminescent Lanthanide-Doped Y 2O 3 Nanorods for Anticounterfeiting. ACS APPLIED MATERIALS & INTERFACES 2017; 9:14301-14308. [PMID: 28394563 DOI: 10.1021/acsami.7b03353] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The duplicity of important documents has emerged as a serious problem worldwide. Therefore, many efforts have been devoted to developing easy and fast anticounterfeiting techniques with multicolor emission. Herein, we report the synthesis of multicolor luminescent lanthanide-doped Y2O3 nanorods by hydrothermal method and their usability in designing of unclonable security codes for anticounterfeiting applications. The spectroscopic features of nanorods are probed by photoluminescence spectroscopy. The Y2O3:Eu3+, Y2O3:Tb3+, and Y2O3:Ce3+ nanorods emit hypersensitive red (at 611 nm), strong green (at 541 nm), and bright blue (at 438 nm) emissions at 254, 305, and 381 nm, respectively. The SEM and TEM/HRTEM results reveal that these nanorods have diameter and length in the range of 80-120 nm and ∼2-5 μm, respectively. The two-dimensional spatially resolved photoluminescence intensity distribution in nanorods is also investigated by using confocal photoluminescence microscopic technique. Further, highly luminescent unclonable security codes are printed by a simple screen printing technique using luminescent ink fabricated from admixing of lanthanide doped multicolor nanorods in PVC medium. The prospective use of these multicolor luminescent nanorods provide a new opportunity for easily printable, highly stable, and unclonable multicolor luminescent security codes for anti-counterfeiting applications.
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Affiliation(s)
- Pawan Kumar
- Alternative Energy Materials Section, Advanced Materials and Devices Division, and ‡Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus , Dr K S Krishnan Road, New Delhi 110012, India
| | - Kanika Nagpal
- Alternative Energy Materials Section, Advanced Materials and Devices Division, and ‡Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus , Dr K S Krishnan Road, New Delhi 110012, India
| | - Bipin Kumar Gupta
- Alternative Energy Materials Section, Advanced Materials and Devices Division, and ‡Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus , Dr K S Krishnan Road, New Delhi 110012, India
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9
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Kumar P, Singh S, Singh VN, Singh N, Gupta RK, Gupta BK. Experimental observation of spatially resolved photo-luminescence intensity distribution in dual mode upconverting nanorod bundles. Sci Rep 2017; 7:42515. [PMID: 28211891 PMCID: PMC5304174 DOI: 10.1038/srep42515] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 01/06/2017] [Indexed: 12/14/2022] Open
Abstract
A novel method for demonstration of photoluminescence intensity distribution in upconverting nanorod bundles using confocal microscopy is reported. Herein, a strategy for the synthesis of highly luminescent dual mode upconverting/downshift Y1.94O3:Ho3+0.02/Yb3+0.04 nanorod bundles by a facile hydrothermal route has been introduced. These luminescent nanorod bundles exhibit strong green emission at 549 nm upon excitations at 449 nm and 980 nm with quantum efficiencies of ~6.3% and ~1.1%, respectively. The TEM/HRTEM results confirm that these bundles are composed of several individual nanorods with diameter of ~100 nm and length in the range of 1–3 μm. Furthermore, two dimensional spatially resolved photoluminescence intensity distribution study has been carried out using confocal photoluminescence microscope throughout the nanorod bundles. This study provides a new direction for the potential use of such emerging dual mode nanorod bundles as photon sources for next generation flat panel optical display devices, bio-medical applications, luminescent security ink and enhanced energy harvesting in photovoltaic applications.
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Affiliation(s)
- Pawan Kumar
- Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR- National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi, 110012, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus. Dr. K. S. Krishnan Road, New Delhi 110012, India
| | - Satbir Singh
- Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR- National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi, 110012, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus. Dr. K. S. Krishnan Road, New Delhi 110012, India
| | - V N Singh
- Advanced Materials and Devices Group, Physics of Energy Harvesting Division, CSIR - National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi, 110012, India
| | - Nidhi Singh
- Metals, Alloys and Composites for Energy Applications Group, Physics of Energy Harvesting Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India
| | - R K Gupta
- Department of Chemistry, Pittsburg State University, Pittsburg, KS, 66762, USA
| | - Bipin Kumar Gupta
- Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR- National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi, 110012, India
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Gupta BK, Kumar P, Kedawat G, Kanika K, Vithayathil SA, Gangwar AK, Singh S, Kashyap PK, Lahon R, Singh VN, Deshmukh AD, Narayanan TN, Singh N, Gupta S, Kaipparettu BA. Tunable luminescence from two dimensional BCNO nanophosphor for high-contrast cellular imaging. RSC Adv 2017. [DOI: 10.1039/c7ra08306h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Multi-colour emitting nanophosphors provide a paradigm shift in rare-earth free biocompatible nanoprobes for in vitro and in vivo imaging applications.
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Gupta BK, Singh S, Kumar P, Lee Y, Kedawat G, Narayanan TN, Vithayathil SA, Ge L, Zhan X, Gupta S, Martí AA, Vajtai R, Ajayan PM, Kaipparettu BA. Bifunctional Luminomagnetic Rare-Earth Nanorods for High-Contrast Bioimaging Nanoprobes. Sci Rep 2016; 6:32401. [PMID: 27585638 PMCID: PMC5009349 DOI: 10.1038/srep32401] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 08/04/2016] [Indexed: 01/16/2023] Open
Abstract
Nanoparticles exhibiting both magnetic and luminescent properties are need of the hour for many biological applications. A single compound exhibiting this combination of properties is uncommon. Herein, we report a strategy to synthesize a bifunctional luminomagnetic Gd2-xEuxO3 (x = 0.05 to 0.5) nanorod, with a diameter of ~20 nm and length in ~0.6 μm, using hydrothermal method. Gd2O3:Eu(3+) nanorods have been characterized by studying its structural, optical and magnetic properties. The advantage offered by photoluminescent imaging with Gd2O3:Eu(3+) nanorods is that this ultrafine nanorod material exhibits hypersensitive intense red emission (610 nm) with good brightness (quantum yield more than 90%), which is an essential parameter for high-contrast bioimaging, especially for overcoming auto fluorescent background. The utility of luminomagnetic nanorods for biological applications in high-contrast cell imaging capability and cell toxicity to image two human breast cancer cell lines T47D and MDA-MB-231 are also evaluated. Additionally, to understand the significance of shape of the nanostructure, the photoluminescence and paramagnetic characteristic of Gd2O3:Eu(3+) nanorods were compared with the spherical nanoparticles of Gd2O3:Eu(3+).
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Affiliation(s)
- Bipin Kumar Gupta
- Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR- National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India
| | - Satbir Singh
- Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR- National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus, Dr K S Krishnan Road, New Delhi 110012, India
| | - Pawan Kumar
- Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR- National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus, Dr K S Krishnan Road, New Delhi 110012, India
| | - Yean Lee
- Department of Material Science and Nano Engineering Rice University, Houston, TX 77005, USA
| | - Garima Kedawat
- Department of Physics, Kalindi College, University of Delhi, New Delhi, 110008, India
| | - Tharangattu N. Narayanan
- TIFR- Center for Interdisciplinary sciences, Tata Institute fundamental research, Hydrabad-500075, India
| | | | - Liehui Ge
- Department of Material Science and Nano Engineering Rice University, Houston, TX 77005, USA
| | - Xiaobo Zhan
- Department of Material Science and Nano Engineering Rice University, Houston, TX 77005, USA
| | - Sarika Gupta
- National Institute of Immunology, Aruna Aseaf Ali Marg, J. N. U. Complex, New Delhi-110067, India
| | - Angel A. Martí
- Department of Chemistry and Bioengineering, Rice University, Houston, Texas 77005, USA
| | - Robert Vajtai
- Department of Material Science and Nano Engineering Rice University, Houston, TX 77005, USA
| | - Pulickel M. Ajayan
- Department of Material Science and Nano Engineering Rice University, Houston, TX 77005, USA
| | - Benny Abraham Kaipparettu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
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Kumar P, Singh S, Gupta BK. Future prospects of luminescent nanomaterial based security inks: from synthesis to anti-counterfeiting applications. NANOSCALE 2016; 8:14297-340. [PMID: 27424665 DOI: 10.1039/c5nr06965c] [Citation(s) in RCA: 165] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Counterfeiting of valuable documents, currency and branded products is a challenging problem that has serious economic, security and health ramifications for governments, businesses and consumers all over the world. It is estimated that counterfeiting represents a multi-billion dollar underground economy with counterfeit products being produced on a large scale every year. Counterfeiting is an increasingly high-tech crime and calls for high-tech solutions to prevent and deter the acts of counterfeiting. The present review briefly outlines and addresses the key challenges in this area, including the above mentioned concerns for anti-counterfeiting applications. This article describes a unique combination of all possible kinds of security ink formulations based on lanthanide doped luminescent nanomaterials, quantum dots (semiconductor and carbon based), metal organic frameworks as well as plasmonic nanomaterials for their possible use in anti-counterfeiting applications. Moreover, in this review, we have briefly discussed and described the historical background of luminescent nanomaterials, basic concepts and detailed synthesis methods along with their characterization. Furthermore, we have also discussed the methods adopted for the fabrication and design of luminescent security inks, various security printing techniques and their anti-counterfeiting applications.
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Affiliation(s)
- Pawan Kumar
- Academy of Scientific and Innovative Research (AcSIR), CSIR - National Physical Laboratory Campus, Dr K S Krishnan Road, New Delhi 110012, India and Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India.
| | - Satbir Singh
- Academy of Scientific and Innovative Research (AcSIR), CSIR - National Physical Laboratory Campus, Dr K S Krishnan Road, New Delhi 110012, India and Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India.
| | - Bipin Kumar Gupta
- Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India.
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Singh S, Kumar P, Kaipparettu BA, Gupta BK. Eu 3+ doped α-sodium gadolinium fluoride luminomagnetic nanophosphor as a bimodal nanoprobe for high-contrast in vitro bioimaging and external magnetic field tracking applications. RSC Adv 2016; 6:44606-44615. [PMID: 27668077 PMCID: PMC5031147 DOI: 10.1039/c6ra04373a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Herein, we introduce a novel strategy for the synthesis of Eu3+ doped α-sodium gadolinium fluoride (α-NaGd0.88F4:Eu0.123+) based luminomagnetic nanophosphors using hydrothermal route. The synthesized nanophosphor has exceptional luminescent and paramagnetic properties in a single host lattice, which is highly desirable for biomedical applications. This highly luminescent nanophosphor with an average particle size ∼ 5±3 nm enables high-contrast fluorescent imaging with decreased light scattering. In vitro cellular uptake is shown by fluorescent microscopy that envisages the characteristic hypersensitive red emission of Eu3+ doped α-sodium gadolinium fluoride centered at 608 nm (5D0-7F2) upon 465 nm excitation wavelength. No apparent cytotoxicity is observed. Furthermore, time- resolved emission spectroscopy and SQUID magnetic measurements successfully demonstrate a photoluminescence decay time in microseconds and enhanced paramagnetic behavior respectively, which promises the applications of nanophosphors in biomedical studies. Hence, the obtained results strongly suggest that this nanophosphor could be potentially used as a bimodal nanoprobe for high-contrast in vitro bio-imaging of HeLa cells and external magnetic field tracking applications of luminomagnetic nanophosphors using permanent magnet.
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Affiliation(s)
- Satbir Singh
- Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory, Dr K S Krishnan Road, New Delhi 110012, India
- Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India
| | - Pawan Kumar
- Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory, Dr K S Krishnan Road, New Delhi 110012, India
- Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India
| | - Benny Abraham Kaipparettu
- Department of Molecular and Human Genetics & Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Bipin Kumar Gupta
- Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India
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14
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Kedawat G, Kumar P, Anshul A, Deshmukh AD, Singh OP, Gupta RK, Amritphale SS, Gupta G, Singh VN, Gupta BK. Luminomagnetic bifunctionality of Mn(2+)-bonded graphene oxide/reduced graphene oxide two dimensional nanosheets. NANOSCALE 2015; 7:12498-12509. [PMID: 26393249 DOI: 10.1039/c5nr01095k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Herein, we report the luminomagnetic bifunctional properties of two-dimensional (2D) Mn(2+) bonded graphene oxide (GO)/reduced graphene oxide (RGO) nanosheets synthesized using a facile route of oxidation followed by a solvothermal reduction method. Photoluminescence (PL) studies (excited by different wavelengths) revealed that the resonant energy transfer between Mn(2+) and sp(3)/sp(2) clusters of GO/RGO is responsible for the enhancement of emissions. Moreover, pH-sensitive PL behaviors have also been investigated in detail. The ferromagnetic behavior is believed to arise due to defects in Mn(2+) bonded GO composites. Thus, present reduction method provides a direct route to tune and enhance the optical properties of GO and RGO nanosheets bonded with Mn(2+) ions, which creates an opportunity for various technological applications.
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15
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Chung HJ, Pellegrini KL, Chung J, Wanigasuriya K, Jayawardene I, Lee K, Lee H, Vaidya VS, Weissleder R. Nanoparticle Detection of Urinary Markers for Point-of-Care Diagnosis of Kidney Injury. PLoS One 2015; 10:e0133417. [PMID: 26186708 PMCID: PMC4506142 DOI: 10.1371/journal.pone.0133417] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 06/26/2015] [Indexed: 11/27/2022] Open
Abstract
The high incidence of acute and chronic kidney injury due to various environmental factors such as heavy metals or chemicals has been a major problem in developing countries. However, the diagnosis of kidney injury in these areas can be more challenging due to the lack of highly sensitive and specific techniques that can be applied in point-of-care settings. To address this, we have developed a technique called ‘micro-urine nanoparticle detection (μUNPD)’, that allows the detection of trace amounts of molecular markers in urine. Specifically, this technique utilizes an automated on-chip assay followed by detection with a hand-held device for the read-out. Using the μUNPD technology, the kidney injury markers KIM-1 and Cystatin C were detected down to concentrations of 0.1 ng/ml and 20 ng/ml respectively, which meets the cut-off range required to identify patients with acute or chronic kidney injury. Thus, we show that the μUNPD technology enables point of care and non-invasive detection of kidney injury, and has potential for applications in diagnosing kidney injury with high sensitivity in resource-limited settings.
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Affiliation(s)
- Hyun Jung Chung
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge St, CPZN 5206, Boston, Massachusetts, United States of America
| | - Kathryn L. Pellegrini
- Renal Division, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jaehoon Chung
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge St, CPZN 5206, Boston, Massachusetts, United States of America
| | - Kamani Wanigasuriya
- Department of Medicine, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Innocent Jayawardene
- Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, and Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Kyungheon Lee
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge St, CPZN 5206, Boston, Massachusetts, United States of America
| | - Hakho Lee
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge St, CPZN 5206, Boston, Massachusetts, United States of America
| | - Vishal S. Vaidya
- Renal Division, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Ralph Weissleder
- Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge St, CPZN 5206, Boston, Massachusetts, United States of America
- Department of Systems Biology, Harvard Medical School, 200 Longwood Ave, Boston, Massachusetts, United States of America
- * E-mail:
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16
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Kumar P, Gupta BK. New insight into rare-earth doped gadolinium molybdate nanophosphor assisted broad spectral converters from UV to NIR for silicon solar cells. RSC Adv 2015. [DOI: 10.1039/c4ra15383a] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Demonstration of novel rare-earth doped gadolinium molybdate nanophosphor assisted broad spectral converters from UV to NIR for Si-solar cell application.
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Affiliation(s)
- Pawan Kumar
- CSIR – National Physical Laboratory
- New Delhi
- India
- Academy of Scientific and Innovative Research (AcSIR)
- CSIR – National Physical Laboratory
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17
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Kasprzyk W, Krzywda P, Bednarz S, Bogdał D. Fluorescent citric acid-modified silicone materials. RSC Adv 2015. [DOI: 10.1039/c5ra18100c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel transparent and flexible silicone materials with fluorescent properties were developed by incorporation of derivative of 2-pyridone into silicone matrix.
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Affiliation(s)
- Wiktor Kasprzyk
- Department of Biotechnology and Physical Chemistry
- Faculty of Chemical Engineering and Technology
- Cracow University of Technology
- 32-048 Krakow
- Poland
| | - Piotr Krzywda
- Department of Biotechnology and Physical Chemistry
- Faculty of Chemical Engineering and Technology
- Cracow University of Technology
- 32-048 Krakow
- Poland
| | - Szczepan Bednarz
- Department of Biotechnology and Physical Chemistry
- Faculty of Chemical Engineering and Technology
- Cracow University of Technology
- 32-048 Krakow
- Poland
| | - Dariusz Bogdał
- Department of Biotechnology and Physical Chemistry
- Faculty of Chemical Engineering and Technology
- Cracow University of Technology
- 32-048 Krakow
- Poland
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18
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Zheng W, Tu D, Huang P, Zhou S, Chen Z, Chen X. Time-resolved luminescent biosensing based on inorganic lanthanide-doped nanoprobes. Chem Commun (Camb) 2015; 51:4129-43. [DOI: 10.1039/c4cc10432c] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this feature article, we review the latest advancements in lanthanide-doped luminescent nanocrystals as time-resolved luminescent nano-bioprobes, from their fundamental optical properties to their potential applications for ultrasensitive biodetection and high-resolution bioimaging.
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Affiliation(s)
- Wei Zheng
- Key Laboratory of Optoelectronic Materials Chemistry and Physics
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Datao Tu
- Key Laboratory of Optoelectronic Materials Chemistry and Physics
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Ping Huang
- Key Laboratory of Optoelectronic Materials Chemistry and Physics
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Shanyong Zhou
- Key Laboratory of Optoelectronic Materials Chemistry and Physics
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Zhuo Chen
- State Key Laboratory of Structural Chemistry, and Danish-Chinese Centre for Proteases and Cancer
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Xueyuan Chen
- Key Laboratory of Optoelectronic Materials Chemistry and Physics
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
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19
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Davidson RA, Sugiyama C, Guo T. Determination of absolute quantum efficiency of X-ray nano phosphors by thin film photovoltaic cells. Anal Chem 2014; 86:10492-6. [PMID: 25284203 DOI: 10.1021/ac5032594] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The absolute optical power at 611 nm emitting from Eu doped Gd2O3 nano phosphors upon X-ray excitation from a microfocus X-ray source operated at 100 kV was measured with thin film photovoltaic cells (TFPCs), whose optical response was calibrated using an He-Ne laser at 632 nm. The same TFPCs were also used to determine the absorbed X-ray power by the nano phosphors. These measurements provided a convenient and inexpensive way to determine the absolute quantum efficiency of nano phosphors, normally a difficult task. The measured absolute X-ray-to-optical fluorescence efficiency of the nano phosphors annealed at 1100 °C was 3.2%. This is the first time such efficiency for Eu/Gd2O3 nano phosphors is determined, and the measured efficiency is a fraction of the theoretically predicted maximum efficiency of 10% reported in the literature.
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Affiliation(s)
- R Andrew Davidson
- Department of Chemistry, University of California-Davis , Davis, California 95616, United States
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20
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Seeta Rama Raju G, Pavitra E, Nagaraju GP, Ramesh K, El-Rayes BF, Yu JS. Imaging and curcumin delivery in pancreatic cancer cell lines using PEGylated α-Gd2(MoO4)3 mesoporous particles. Dalton Trans 2014; 43:3330-8. [PMID: 24366050 DOI: 10.1039/c3dt52692e] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Mesoporous particles are emerging as multifunctional biomaterials for imaging and drug delivery in several disease models, including cancer. We developed PEGylated α-Gd2(MoO4)3 marigold flower-like mesoporous particles for the purpose of drug delivery and, more specifically, evaluated their ability to deliver curcumin. The obtained mesoporous particles significantly conjugated the curcumin particles on their surfaces by inducing the formation of curcumin nanoparticles. In vitro studies of the PEGylated mesoporous particles filled with curcumin demonstrated that these particles could considerably facilitate the continuous and sustained release of curcumin into the cytoplasm and nucleus. As a result, the intracellular release of curcumin can inhibit proliferation in two human pancreatic cancer cell lines: MIA PaCa-2 and PANC-1. Additionally, the particles showed the increased inhibition of pIKKα, pIKKα/β and NF-κB-DNA binding activity as compared to pure curcumin. The curcumin conjugated mesoporous particles are concentrated in the cytoplasm and nucleus of the treated cancer cell lines. Consequently, these mesoporous particles are an effective method for drug delivery that can cross the biological barriers of the body targeting the cellular nucleoplasm.
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Affiliation(s)
- G Seeta Rama Raju
- Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon-dong, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, Republic of Korea.
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21
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Xu X, Ji J, Wang G, You X. Exciton Coupling of Surface Complexes on a Nanocrystal Surface. Chemphyschem 2014; 15:2536-41. [DOI: 10.1002/cphc.201402156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Indexed: 11/09/2022]
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22
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Stanton IN, Belley MD, Nguyen G, Rodrigues A, Li Y, Kirsch DG, Yoshizumi TT, Therien MJ. Europium- and lithium-doped yttrium oxide nanocrystals that provide a linear emissive response with X-ray radiation exposure. NANOSCALE 2014; 6:5284-8. [PMID: 24696056 PMCID: PMC4519031 DOI: 10.1039/c4nr00497c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Eu- and Li-doped yttrium oxide nanocrystals [Y2-xO3; Eux, Liy], in which Eu and Li dopant ion concentrations were systematically varied, were developed and characterized (TEM, XRD, Raman spectroscopic, UV-excited lifetime, and ICP-AES data) in order to define the most emissive compositions under specific X-ray excitation conditions. These optimized [Y2-xO3; Eux, Liy] compositions display scintillation responses that: (i) correlate linearly with incident radiation exposure at X-ray energies spanning from 40-220 kVp, and (ii) manifest no evidence of scintillation intensity saturation at the highest evaluated radiation exposures [up to 4 Roentgen per second]. For the most emissive nanoscale scintillator composition, [Y1.9O3; Eu0.1, Li0.16], excitation energies of 40, 120, and 220 kVp were chosen to probe the dependence of the integrated emission intensity upon X-ray exposure-rate in energy regimes having different mass-attenuation coefficients and where either the photoelectric or the Compton effect governs the scintillation mechanism. These experiments demonstrate for the first time for that for comparable radiation exposures, when the scintillation mechanism is governed by the photoelectric effect and a comparably larger mass-attenuation coefficient (120 kVp excitation), greater integrated emission intensities are recorded relative to excitation energies where the Compton effect regulates scintillation (220 kVp) in nanoscale [Y2-xO3; Eux] crystals. Nanoscale [Y1.9O3; Eu0.1, Li0.16] (70 ± 20 nm) was further exploited as a detector material in a prototype fiber-optic radiation sensor. The scintillation intensity from the [Y1.9O3; Eu0.1, Li0.16]-modified, 400 μm sized optical fiber tip, recorded using a CCD-photodetector and integrated over the 605-617 nm wavelength domain, was correlated with radiation exposure using a Precision XRAD 225Cx small-animal image guided radiation therapy (IGRT) system. For both 80 and 225 kVp energies, this radiotransparent device recorded scintillation intensities that tracked linearly with total radiation exposure, highlighting its capability to provide alternately accurate dosimetry measurements for both diagnostic imaging (80 kVp) and radiation therapy treatment (225 kVp).
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Affiliation(s)
- Ian N Stanton
- Department of Chemistry, French Family Science Center, Duke University, 124 Science Drive, Durham, North Carolina 27708, USA.
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23
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Dwivedi J, Kumar P, Kumar A, Sudama S, Singh VN, Singh BP, Dhawan SK, Shanker V, Gupta BK. A commercial approach for the fabrication of bulk and nano phosphors converted into highly efficient white LEDs. RSC Adv 2014. [DOI: 10.1039/c4ra11318g] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
A novel approach for the comparative study of bulk and nano phosphors converted into highly efficient white LEDs.
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Affiliation(s)
- Jaya Dwivedi
- Luminescent Materials and Devices Group
- Materials Physics and Engineering Division
- India
- CSIR - National Physical Laboratory
- New Delhi, India
| | - Pawan Kumar
- Luminescent Materials and Devices Group
- Materials Physics and Engineering Division
- India
- CSIR - National Physical Laboratory
- New Delhi, India
| | - Arun Kumar
- Luminescent Materials and Devices Group
- Materials Physics and Engineering Division
- India
- CSIR - National Physical Laboratory
- New Delhi, India
| | - Sudama Sudama
- CSIR - National Physical Laboratory
- New Delhi, India
- Optical Radiation Standards
- Apex Level Standards & Industrial Metrology
- India
| | - V. N. Singh
- CSIR - National Physical Laboratory
- New Delhi, India
- Electron and Ion Microscopy Section
- Sophisticated Analytical Instruments Division
| | - Bhanu Pratap Singh
- CSIR - National Physical Laboratory
- New Delhi, India
- Physics and Engineering of Carbon
- Materials Physics and Engineering Division
- India
| | - S. K. Dhawan
- CSIR - National Physical Laboratory
- New Delhi, India
- Polymeric and Soft Materials
- Materials Physics and Engineering Division
- India
| | - V. Shanker
- Luminescent Materials and Devices Group
- Materials Physics and Engineering Division
- India
- CSIR - National Physical Laboratory
- New Delhi, India
| | - Bipin Kumar Gupta
- Luminescent Materials and Devices Group
- Materials Physics and Engineering Division
- India
- CSIR - National Physical Laboratory
- New Delhi, India
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24
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Krishnan R, Thirumalai J. Up/down conversion luminescence properties of (Na0.5Gd0.5)MoO4:Ln3+(Ln = Eu, Tb, Dy, Yb/Er, Yb/Tm, and Yb/Ho) microstructures: synthesis, morphology, structural and magnetic investigation. NEW J CHEM 2014. [DOI: 10.1039/c4nj00165f] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Fabrication of luminescent and macroporous Y2O3:Eu3+-coated silica monoliths via freeze drying. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2013.10.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Chen YC, Huang SC, Wang YK, Liu YT, Wu TK, Chen TM. Ligand-functionalization of BPEI-coated YVO4:Bi3+,Eu3+ nanophosphors for tumor-cell-targeted imaging applications. Chem Asian J 2013; 8:2652-9. [PMID: 23894123 DOI: 10.1002/asia.201300570] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 05/22/2013] [Indexed: 01/06/2023]
Abstract
In this study, surface-functionalized, branched polyethylenimine (BPEI)-modified YVO4:Bi(3+),Eu(3+) nanocrystals (NCs) were successfully synthesized by a simple, rapid, solvent-free hydrothermal method. The BPEI-coated YVO4:Bi(3+),Eu(3+) NCs with high crystallinity show broad-band excitation in the λ=250 to 400 nm near-ultraviolet (NUV) region and exhibit a sharp-line emission band centered at λ=619 nm under excitation at λ=350 nm. The surface amino groups contributed by the capping agent, BPEI, not only improve the dispersibility and water/buffer stability of the BPEI-coated YVO4:Bi(3+),Eu(3+) NCs, but also provide a capability for specifically targeted biomolecule conjugation. Folic acid (FA) and epidermal growth factor (EGF) were further attached to the BPEI-coated YVO4:Bi(3+),Eu(3+) NCs and exhibited effective positioning of fluorescent NCs toward the targeted folate receptor overexpressed in HeLa cells or EGFR overexpressed in A431 cells with low cytotoxicity. These results demonstrate that the ligand-functionalized, BPEI-coated YVO4:Bi(3+),Eu(3+) NCs show great potential as a new-generation biological luminescent bioprobe for bioimaging applications. Moreover, the unique luminescence properties of BPEI-coated YVO4:Bi(3+),Eu(3+) NCs show potential to combine with a UVA photosensitizing drug to produce both detective and therapeutic effects for human skin cancer therapy.
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Affiliation(s)
- Yi-Chin Chen
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Science Building 2, 1001 Ta Hsueh Road, Hsinchu, 300 (Taiwan), Fax: (+886) 3-5723764
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