Article
Chemistry, Physical
Minkun Jin, Jinmeng Xiang, Changheng Chen, Zhiyu Zhang, Yuexin Li, Jingjing Tang, Chongfeng Guo
Summary: In this study, a two-dimensional nanoplatform with photothermal and photodynamic functions was constructed for cancer treatment. The feasibility of the platform was validated by monitoring temperature changes and verifying its photothermal and photodynamic performance, providing a new approach for designing multifunctional photosynergistic therapy nanoplatforms.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Schindra Kumar Ray, Bhupendra Joshi, Jin Hur
Summary: In this study, rare earth-doped α-NiMoO4 nanoparticles were successfully synthesized, and white light emission was obtained by tuning the concentrations of different dopant ions. The nanoparticles exhibited white color emission and could be potential candidates for white-light devices.
Article
Nanoscience & Nanotechnology
Pratik S. Solanki, Sangeetha Balabhadra, Michael F. Reid, Vladimir B. Golovko, Jon-Paul R. Wells
Summary: This study demonstrates high-sensitivity luminescence thermometry using Yb3+/Er3+ co-doped KY3F10 core and core-shell upconverting nanoparticles. By tuning the excitation wavelength to 975 nm for resonant excitation with optical transitions of the Yb3+ ion, the highest thermal sensitivities and temperature uncertainties were achieved. High-resolution Yb3+ excitation spectra were recorded by observing Er3+ upconversion fluorescence, with significant enhancement in fluorescence intensity observed for core and core-shell nanoparticles.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Bui The Huy, Dae Hyun Kwon, Seong-Soo Lee, Van-Duong Dao, Hai Bang Truong, Yong-Ill Lee
Summary: The study presented the preparation and application of Sr2YF7 (SYF) doped with Yb3+, Er3+, and Eu3+ ions as a component of the working electrode for solar cells, exhibiting strong optical properties and color emission performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Jing Zhang, Jue Wang, Jinhui Xie, Lixi Wang, Qitu Zhang
Summary: The NaMgF3:2.5%Yb3+, 0.5%Er3+ nanocrystals with different concentrations of Eu3+ were synthesized using the hydrothermal method. The intensity of upconversion luminescence was enhanced significantly, especially at a 0.01 mol% Eu3+ concentration. Both red and green emissions were confirmed to be three-photon upconversion processes, and Er3+ played a crucial role in the effective energy transfer processes within the nanocrystals.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Marian Janek, Robert Klement, Mira Naftaly, Ekaterina Trusova, Anton Gatial, Peter Veteska, L'ubos Baca
Summary: Oxide ceramics with pyrochlore structure, such as La2Zr2O7, have promising potential for advanced multifunctional applications in extreme environments. This study investigated the effects of doping elements like Er3+ and Yb3+ on the material's photophysical properties and dielectric performance at terahertz frequencies.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Inorganic & Nuclear
Hongqiang Cui, Yongze Cao, Yuhang Zhang, Lei Li, Guojian Li, Sai Xu, Yichao Wang, Jinsu Zhang, Baojiu Chen
Summary: Er3+/Yb3+ co-doped CBSPO phosphors with significant thermal enhancement were successfully prepared, and the thermal-enhancing effect was studied in detail. The upconversion luminescence intensities of Er3+ were greatly enhanced with the increase in temperature under 980 nm laser excitation, accompanied by a change in the luminescence color. The maximum absolute temperature sensitivity of CBSPO:Er3+/Yb3+ was calculated to be 0.01026 K-1.
DALTON TRANSACTIONS
(2022)
Article
Optics
R. M. Gunji, G. R. S. Mattos, C. D. S. Bordon, J. A. M. Garcia, L. A. Gomez-Malagon, L. R. P. Kassab
Summary: We investigated the effect of TiO2 nanoparticles on the optical properties of Er3+-doped and Er3+/Yb3+ codoped GeO2-PbO glasses. Our study demonstrates a successful method to produce TiO2 nanoparticles with anatase structure, which promotes infrared-to-visible frequency upconversion in the glasses. The samples doped with Er3+ and TiO2 nanoparticles showed significant enhancement in photoluminescence, and the samples codoped with Er3+/Yb3+ and TiO2 nanoparticles exhibited enhanced upconversion intensity. This research fills the gap in the literature and can be applied to different hosts for various photonics applications.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
Jose Henrique Faleiro, Noelio O. Dantas, Anielle C. A. Silva, Helliomar P. Barbosa, Bruno H. S. T. da Silva, Karmel de O. Lima, Rogeria Rocha Goncalves, Jefferson Luis Ferrari
Summary: This study reports on the preparation and photoluminescence properties of phosphate glass matrix doped with Yb3+, Eu3+ and Er3+ with different amount of Nb2O5. It was observed that the Nb2O5 content does not influence the photo-luminescent properties of the Eu3+ ion, suggesting potential applications in energy conversion.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Liuyan Zhou, Yanling Chen, Yuyu Shen, Jianhua Lin, Jie Fu, Lei Lei, Renguang Ye, Degang Deng, Shiqing Xu
Summary: Down/upconversion Ca14Al10Zn6O35 inorganic phosphors codoped with Ti4+/Eu3+ or Yb3+/Er3+ were prepared and studied for their crystal structure and luminescence properties. The results showed that Ti4+ and Eu3+ ions occupied specific sites in the host lattice and can be used as temperature sensors based on fluorescence intensity ratio (FIR) technology. The phosphors exhibited high relative sensitivity and temperature measurement precision.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Yupaporn Niyom, Eduard Madirov, Nisrin Mohamed Bhiri, Aditya Chauhan, Bryce S. Richards, Adrian Flood, Daniel Crespy, Andrey Turshatov
Summary: This study demonstrates that doping with optically neutral Zn2+ ion significantly improves the photoluminescence quantum yield (QY) of short-wave infrared emission. The QY of GdVO4:Yb3+, Er3+, Zn2+ nanoparticles synthesized by co-precipitation method is initially low at 0.1%, but can be significantly increased to 27.2% after calcination. Micron-sized particles dispersed in water show a decrease in QY of 2.3%, while nanoparticles with a size of 125 nm have a QY of only 0.1% in water.
Article
Engineering, Electrical & Electronic
Shiyi Geng, Xiliang Jiang, Zhongyuan Zhang, Rujia Chen, Zidong Zhou, Xu Zhang, Huisheng Liu, Xueming Shi, Tianqing Zhang, Zhuang Leng, Chun Li, Weiling Yang, Hai Lin, Lina Liu, Shasha Li, Fanming Zeng, Zhongmin Su
Summary: Yb3+-Er3+ and Yb3+-Ho3+ co-doped Y2W3O12 phosphors were prepared and characterized. The best combination of ion doping concentration was found to be 20%Yb3+-1%Er3+ and 8%Yb3+-1%Ho3+. The emission spectra showed strong green and weak red emission for Yb3+-Er3+: Y2W3O12, and typical green and red emission for Yb3+-Ho3+: Y2W3O12, indicating an energy transfer process. These materials hold great potential for applications in up-conversion luminescence, laser, anti-counterfeiting, lighting, and other technologies.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Xinxu Li, Bingting Bao, Xinyu He, Guoqiang Wang, Yantang Huang, Lingyun Li, Yan Yu
Summary: Optical temperature sensing technology based on Er3+, Yb3+ co-doped up-conversion luminescent materials has great potential in temperature detection. However, the high temperature phase and chemical stability of these materials, most of which are phosphors, still need further improvement. In this study, Er3+, Yb3+ co-doped LaBMoO6 single crystal is successfully synthesized and shows enhanced up-conversion performance compared to polycrystalline samples. A practical optical fiber type temperature sensor is fabricated using this single crystal as the luminescence sensing medium.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Anil Dogan, Saniye Merve Yildirim, Murat Erdem, Kadir Esmer, Gonul Eryurek
Summary: Er3+ and Yb3+/Er3+ doped TeO2-ZnO-BaO glasses were synthesized with two different Er3+ concentrations using the melt quenching technique. The glasses exhibited blue, green, and red emissions in the visible region and a broadband emission around 1530 nm in the near infrared under 975 nm laser excitation. The red emission intensity increased in the Yb3+/Er3+ co-doped glasses due to energy transfer, as indicated by the change in color coordinates. The glasses showed promising temperature sensing abilities, with the highest absolute sensitivity at 0.0046 K-1 for Er3+ doped glass and 0.0067 K-1 for Yb3+/Er3+ co-doped glass.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Ho Kim Dan, Nguyen Dinh Trung, T. H. Le, Nguyen Le Thai, Nguyen Minh Ty, Dacheng Zhou, Jianbei Qiu
Summary: This paper investigates the influences of F- ions on the reduction of Eu3+ to Eu2+ and the optical properties of Eu3+/Eu2+-Er3+-Yb3+ co-doped niobate silicate glasses. The study shows that the glasses exhibit visible and upconversion emissions under different excitation conditions, and energy transfer is achieved.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Green & Sustainable Science & Technology
Ivana Validzic, Vesna Lojpur, Miodrag Mitric
Summary: This study examines the operating characteristics of commercial monocrystalline and amorphous Si-solar cells in both indoor and outdoor settings, with and without the use of a water flow lens (WFL) system. The findings suggest that the WFL system can significantly improve the efficiency of the solar cells, particularly under lower lighting conditions.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Engineering, Multidisciplinary
Tamara Gavrilovic, Jovana Perisa, Zoran Ristic, Karolina Elzbieciak-Piecka, Lukasz Marciniak, Chong-Geng Ma, Zeljka Antic, Miroslav D. Dramicanin
Summary: We demonstrate a thermal history forensic measurement method based on the emission intensity ratio of Eu3+-doped yttrium vanadate. By observing the increase in phosphor's crystallite size with annealing temperature, we found a significant and permanent increase in emission intensity and symmetry ratio, which serves as an indicator of the maximal temperature to which the phosphor was exposed. Additionally, the irreversible change in the symmetry ratio after exposure to high temperatures was found to be insensitive to the exposure time. Furthermore, thermal history readings can be performed at any temperature.
Article
Chemistry, Analytical
Jovana Perisa, Aleksandar Ciric, Ivana Zekovic, Vesna Dordevic, Milica Sekulic, Zeljka Antic, Miroslav D. Dramicanin
Summary: In this study, the sensitivity of luminescence thermometry was enhanced at high temperatures using a Dy3+-activated yttrium aluminum perovskite material. The material showed a small crystallite size and specific morphology, making it suitable for temperature measurement in high-temperature environments. However, the chemical stability of the host material and temperature quenching remain significant limitations of this method.
Article
Optics
Miroslav D. Dramicanin, Lukasz Marciniak, Sanja Kuzman, Wojciech Piotrowski, Zoran Ristic, Jovana Perisa, Ivana Evans, Jelena Mitric, Vesna Dordevic, Nebojsa Romcevic, Mikhail G. Brik, Chong-Geng Ma
Summary: The near-infrared luminescence of Ca6Ba(PO4)(4)O:Mn5+ is studied and explained in this paper. The phosphor exhibits a narrow emission band and high internal quantum efficiency. The crystal field and Racah parameters are derived, and the appropriate Tanabe-Sugano diagram is calculated to explain the luminescence mechanism. Additionally, the electronic band structure, density of states, and vibrational spectra of the Eu2+ dopant in Ca6Ba(PO4)(4)O are investigated. Finally, the phosphor is applied in luminescence intensity ratio thermometry, showing potential for physiological temperature measurements.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Physical
K. Maciejewska, P. Szklarz, A. Bednarkiewicz, M. D. Dramicanin, L. Marciniak
Summary: This study demonstrated that temperature-driven irreversible structural phase transformations in Eu3+ activated LaPO4, La0.5Y0.5PO4, and YPO4 nanocrystals can be utilized for thermal history measurements in the temperature range of 200°C-1000°C. The changes in Eu3+ local surroundings due to temperature increase modified the intensity and emission spectra, and the intensity ratio of Eu3+ 5D0 -> 7F2 to 5D0 -> 7F1 emissions served as a highly-sensitive indicator of the highest temperature experienced by the nanocrystals. The proposed ratiometric readout strategy enhanced the accuracy of thermal history analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Tijana Stamenkovic, Nadezda Radmilovic, Marija Prekajski Dordevic, Mihailo Rabasovic, Ivana Dinic, Milos Tomic, Vesna Lojpur, Lidija Mancic
Summary: Nanopowders of up-conversion SrGd2O4 orthorhombic (Pnma) phase co-doped with different Yb3+ (1, 2.5 and 5 at%) and constant Er3+ (0.5 at%) ions were prepared via sol-gel assisted combustion. The obtained powders are composed of agglomerated nanoparticles with a uniform distribution of all elements. Increasing Yb3+ content enhances the up-conversion emission in the visible spectrum, leading to a significant change in the green to red ratio. Two-photon up-conversion processes are established through Er3+ f-f electronic transitions, resulting in green emission at 523 and 551 nm and red emission at 661 nm. The nanoparticles doped with 0.5 at% Er3+ and co-doped with 5 at% Yb3+ exhibit the highest absolute quantum yield of 0.055% under specific excitation conditions.
JOURNAL OF LUMINESCENCE
(2023)
Article
Materials Science, Multidisciplinary
A. V. Racu, Z. Ristic, A. Ciric, V. Dordevic, G. Buse, M. Poienar, M. J. Gutmann, O. Ivashko, M. Stef, D. Vizman, M. D. Dramicanin, M. Piasecki, M. G. Brik
Summary: This study investigates the correlation between optical properties, local symmetry, and crystal structure in CaF2 and BaF2 fluoride crystals doped with ErF3. The differences in optical properties between CaF2 and BaF2 crystals at room temperature are observed and attributed to the differences in cationic radius and dopant-host ionic radius. The determined symmetries and bond lengths of Er3+- F- ions in both crystals are reported. This study provides valuable insight into the development of lanthanide-doped optical materials.
Article
Materials Science, Multidisciplinary
Wojciech M. Piotrowski, Riccardo Marin, Maja Szymczak, Emma Martin Rodriguez, Dirk H. Ortgies, Paloma Rodriguez-Sevilla, Miroslav D. Dramicanin, Daniel Jaque, Lukasz Marciniak
Summary: Lifetime-based luminescence thermometry enables accurate deep-tissue monitoring of temperature changes, but short lifetimes and poor brightness limit its performance. A solution to these limitations is the design and optimization of luminescent nanothermometers co-doped with transition metal and lanthanide ions, which exhibit strong near-infrared emission and long temperature-dependent photoluminescence lifetime. These nanothermometers, combined with a custom-made instrument, allow for obtaining 2D thermal maps for deep-tissue thermal mapping. This study provides foundations for the deployment of lifetime-based thermometry for accurate deep-tissue temperature monitoring.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Bojana Milicevic, Jovana Perisa, Zoran Ristic, Katarina Milenkovic, Zeljka Antic, Krisjanis Smits, Meldra Kemere, Kaspars Vitols, Anatolijs Sarakovskis, Miroslav D. D. Dramicanin
Summary: We present a hydrothermal synthesis method for ultrasmall Yb3+/Tm3+ co-doped Sr2LaF7 (SLF) upconversion phosphors. By varying the concentrations of Yb3+ (x = 10, 15, 20, and 25 mol%) and Tm3+ (y = 0.75, 1, 2, and 3 mol%), the emissions in the near IR spectral range were analyzed. Structural analysis revealed that Yb3+ and Tm3+ occupy the La3+ sites in the SLF host. The addition of Yb3+/Tm3+ ions significantly affected the lattice constant, particle size, and PL emission properties of the synthesized SLF nanophosphor. The optimal dopant concentrations for upconversion luminescence were found to be 20 mol% Yb3+ and 1 mol% Tm3+ with EDTA as the chelating agent. Strong upconversion emission of Tm3+ ions around 800 nm was achieved under 980 nm light excitation. The study suggests potential applications of ultrasmall Yb3+/Tm3+ co-doped SLF phosphors in fluorescent labels for bioimaging and security.
Article
Biophysics
Jelena Papan Djanis, Jovana Perisa, Patricija Hribar Bostjancic, Katarina Mihajlovski, Vesna Lazic, Miroslav Dramicanin, Darja Lisjak
Summary: Colloidal stabilization is crucial for the preparation of magnetic nanoparticles for biomedical applications. In this study, tannic acid was used as a coating for barium hexaferrite nanoplatelets (BSHF NPLs) to achieve stability in aqueous media. The coated BSHF NPLs were characterized and their magnetic properties were measured. The stable colloids were tested in biological media, and the antimicrobial properties were examined. To enhance antimicrobial activity, tannic acid was used as a platform for the in-situ production of silver on BSHF NPLs. The hybrid material exhibited magnetic properties and excellent antimicrobial activity against Escherichia coli and Staphylococcus aureus.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Chemistry, Analytical
Tahani A. Alrebdi, Abdullah N. Alodhayb, Zoran Ristic, Miroslav D. Dramicanin
Summary: In this study, the performance of single- and multiparametric luminescence thermometry based on the temperature-dependent spectral features of Ca6BaP4O17:Mn5+ near-infrared emission was investigated. Experimental results showed that as the temperature increased, the intensities of the T-3(2) and Stokes bands increased, while the peak of the E-1 emission band redshifted. The multiparametric luminescence thermometry showed comparable performance to the best single-parameter thermometry.
Article
Chemistry, Physical
Tijana Stamenkovic, Dejan Pjevic, Jugoslav Krstic, Maja Popovic, Vladimir Rajic, Vesna Lojpur
Summary: A series of SrGd2O4 samples doped with different concentrations of Sm3+ and Dy3+ were prepared through glycine-assisted combustion synthesis. X-ray Powder Diffraction investigation confirmed the presence of pure orthorhombic lattice SrGd2O4. Energy Dispersive X-ray Spectroscopy showed that the desired elements were incorporated in the structure. Field Emission Scanning Electron Microscopy revealed the morphology of the samples as porous aggregated particles consisting of approximately 50 nm-sized spherical particles. Mercury Intrusion Porosimetry demonstrated the presence of a real permanent 3D pore structure. X-ray Photoelectron Spectroscopy confirmed the successful incorporation of Dy3+ and Sm3+ ions. Down-conversion luminescence spectra showed typical emission transitions for Sm3+ and Dy3+ ions. The energy band gap of the doped samples was calculated to be 4.3 eV using UV-VIS Diffuse Reflectance Spectroscopy. UV-VIS Absorption Spectroscopy observed the photocatalytic degradation process, with approximately 50% of Rhodamine B being mineralized after 4 hours of simulated Sun exposure.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Bojana Vasiljevic, Dusan Milivojevic, Tanja Barudzija, Milica Budimir, Dusan Mijin, Milena Marinovic-Cincovic, Dragana Marinkovic
Summary: In this paper, an efficient and environmentally friendly microwave-assisted synthesis method for zinc phthalocyanine (ZnPc) was developed. The obtained ZnPc crystals showed well-crystallized β-form with high yield and purity after microwave heating for five minutes. Studies including EPR indicated improved photosensitizing potential of microwave-produced crystals, making them viable candidates for photodynamic treatment. The stability of ZnPc was confirmed by gamma rays aftereffect, making them versatile in applications in medicine and sophisticated technology.
Article
Materials Science, Multidisciplinary
Abbi L. Mullins, Aleksandar Ciric, Ivana Zekovic, J. A. Gareth Williams, Miroslav D. Dramicanin, Ivana Radosavljevic Evans
Summary: A series of La1-xGa0.99O3:Cr-0.01, Nd-x phosphors were synthesized for luminescence thermometry. The compounds feature near infra-red emissions from transition metal and rare earth activator ions, making them attractive for potential in vivo applications. The thermometric analysis showed high sensitivity, excellent temperature resolution, and high stability by monitoring the luminescence intensity ratio between Cr3+ and Nd3+ emissions.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Engineering, Electrical & Electronic
Zoran Ristic, Wojciech Piotrowski, Mina Medic, Jovana Perisa, Zeljka M. Antic, Lukasz Marciniak, Miroslav D. Dramicanin
Summary: This paper describes Mn5+-activated Sr-3(PO4)(2) and Ba-3(PO4)(2) phosphors as near-infrared lifetime-based luminescence thermometry probes. The materials were prepared by a solid-state method and their structures were confirmed by X-ray diffraction analysis. The study found that the materials showed broad and strong absorption in the range of 650 to 950 nm, with a red shift in the emission maximum. The temperature properties of the phosphors were evaluated by measuring the temperature dependence of the Mn5+ excited-state lifetime.
ACS APPLIED ELECTRONIC MATERIALS
(2022)