1
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Assessing the reproducibility and up-scaling of the synthesis of Er,Yb-doped NaYF 4-based upconverting nanoparticles and control of size, morphology, and optical properties. Sci Rep 2023; 13:2288. [PMID: 36759652 PMCID: PMC9911732 DOI: 10.1038/s41598-023-28875-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 01/25/2023] [Indexed: 02/11/2023] Open
Abstract
Lanthanide-based, spectrally shifting, and multi-color luminescent upconverting nanoparticles (UCNPs) have received much attention in the last decades because of their applicability as reporter for bioimaging, super-resolution microscopy, and sensing as well as barcoding and anti-counterfeiting tags. A prerequisite for the broad application of UCNPs in areas such as sensing and encoding are simple, robust, and easily upscalable synthesis protocols that yield large quantities of UCNPs with sizes of 20 nm or more with precisely controlled and tunable physicochemical properties from low-cost reagents with a high reproducibility. In this context, we studied the reproducibility, robustness, and upscalability of the synthesis of β-NaYF4:Yb, Er UCNPs via thermal decomposition. Reaction parameters included solvent, precursor chemical compositions, ratio, and concentration. The resulting UCNPs were then examined regarding their application-relevant physicochemical properties such as size, size distribution, morphology, crystal phase, chemical composition, and photoluminescence. Based on these screening studies, we propose a small volume and high-concentration synthesis approach that can provide UCNPs with different, yet controlled size, an excellent phase purity and tunable morphology in batch sizes of up to at least 5 g which are well suited for the fabrication of sensors, printable barcodes or authentication and recycling tags.
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2
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Yao L, Meng H, Liu M. Citric acid tuned negative thermal quenching of all inorganic copper-based perovskites. RSC Adv 2023; 13:5428-5436. [PMID: 36793305 PMCID: PMC9923819 DOI: 10.1039/d3ra00279a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 02/01/2023] [Indexed: 02/15/2023] Open
Abstract
Copper-based perovskites, with lower electronic dimensions and high photoluminescence quantum yields (PLQY), which are non-toxic and thermally stable, have been reported since 2019 and have immediately attracted great attention. So far, only a few studies have researched the temperature-dependent photoluminescence properties, posing a challenge in ensuring the stability of the material. In this paper, the temperature-dependent photoluminescence properties have been investigated in detail, and a negative thermal quenching of all-inorganic CsCu2I3 perovskites has been studied. Moreover, the negative thermal quenching property can be tuned with the assistance of citric acid, which has not been reported before. The Huang-Rhys factors are calculated to be 46.32/38.31, which is higher than for many semiconductors and perovskites.
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Affiliation(s)
- Lu Yao
- School of Advanced Materials, Peking University Shen Zhen Graduate School 2199 Lishui Road Shenzhen 518055 P. R. China
| | - Hong Meng
- School of Advanced Materials, Peking University Shen Zhen Graduate School 2199 Lishui Road Shenzhen 518055 P. R. China
| | - Ming Liu
- School of Advanced Materials, Peking University Shen Zhen Graduate School 2199 Lishui Road Shenzhen 518055 P. R. China
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3
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Jiang W, Yi J, Li X, He F, Niu N, Chen L. A Comprehensive Review on Upconversion Nanomaterials-Based Fluorescent Sensor for Environment, Biology, Food and Medicine Applications. BIOSENSORS 2022; 12:1036. [PMID: 36421153 PMCID: PMC9688752 DOI: 10.3390/bios12111036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/07/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
Near-infrared-excited upconversion nanoparticles (UCNPs) have multicolor emissions, a low auto-fluorescence background, a high chemical stability, and a long fluorescence lifetime. The fluorescent probes based on UCNPs have achieved great success in the analysis of different samples. Here, we presented the research results of UCNPs probes utilized in analytical applications including environment, biology, food and medicine in the last five years; we also introduced the design and construction of upconversion optical sensing platforms. Future trends and challenges of the UCNPs used in the analytical field have also been discussed with particular emphasis.
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Affiliation(s)
- Wei Jiang
- College of Chemistry, Chemical Engineering and Resource Utilization, Key Laboratory of Forest Plant Ecology, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China
| | - Jiaqi Yi
- College of Chemistry, Chemical Engineering and Resource Utilization, Key Laboratory of Forest Plant Ecology, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China
| | - Xiaoshuang Li
- College of Chemistry, Chemical Engineering and Resource Utilization, Key Laboratory of Forest Plant Ecology, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China
| | - Fei He
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
| | - Na Niu
- College of Chemistry, Chemical Engineering and Resource Utilization, Key Laboratory of Forest Plant Ecology, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
| | - Ligang Chen
- College of Chemistry, Chemical Engineering and Resource Utilization, Key Laboratory of Forest Plant Ecology, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China
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4
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5
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Cheng Y, Sun K. Color modification of ZnGa 2O 4:Yb 3+,Er 3+,Tm 3+ upconversion phosphors with the doping of Sn 4+ and Ge 4+ ions. APPLIED OPTICS 2020; 59:7313-7320. [PMID: 32902496 DOI: 10.1364/ao.399519] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 07/13/2020] [Indexed: 06/11/2023]
Abstract
Upconversion phosphors Zn3Ga2SnxGe1-xO8:Yb3+,Er3+,Tm3+ were prepared by solid-state reaction with a subsequent thermal treatment at 1300°C. Under the excitation of a 980 nm laser, all phosphors produced blue emission at 477 nm, green emissions at 526 nm and 549 nm, and red emissions at 659 nm and 694 nm. The doping of Sn4+ ions and Ge4+ ions had no effect on the positions of upconversion emission peaks. However, the emission intensity changed in different degrees with different doping ions in the matrix. According to the basic theory of color-light, it is known that the color-light can be obtained by mixing a definite ratio of red, green, and blue emissions. Specifically, in the 980 nm light excitation, ZGO:Yb,Er,Tm phosphors show purplish pink luminescence, while ZGSO:Yb,Er,Tm show greenish blue luminescence, ZGGO:Yb,Er,Tm show purplish blue luminescence, and ZGGSO:Yb,Er,Tm show blue luminescence. In other words, doping Sn4+ ions can move upconversion luminescence toward the green region, while doping Ge4+ ions bend it toward the blue region. Adjusting the doping of Sn4+ ions and Ge4+ ions can obviously change the upconversion luminescent color. Besides, the upconversion luminescence of all as-prepared phosphors is visible to the naked eye without additional optical instruments.
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6
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Pan T, Sun L, Gao R, Fu L, Ai XC, Zhang JP. Efficient modulation of upconversion luminescence in NaErF 4-based core–shell nanocrystals. NEW J CHEM 2020. [DOI: 10.1039/c9nj06240h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient modulation of upconversion luminescence in heavily-doped core–shell nanocrystals by the tuning of [F]/[RE] ratio during synthesis.
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Affiliation(s)
- Tingting Pan
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
| | - Liyuan Sun
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
| | - Rongyao Gao
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
| | - Limin Fu
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
| | - Xi-Cheng Ai
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
| | - Jian-Ping Zhang
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
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7
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Asadi M, Ghahari M, Hassanzadeh‐Tabrizi SA, Arabi AM, Nasiri R. Synthesis, characterization, and in vitro toxicity evaluation of upconversion luminescence NaLuF
4
:Yb
3+
/Tm
3+
nanoparticles suitable for medical applications. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201900281] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Mohammad Asadi
- Advanced Materials Research Center, Department of Materials Engineering, Najafabad BranchIslamic Azad University Najafabad Iran
| | - Mehdi Ghahari
- Advanced Materials Research Center, Department of Materials Engineering, Najafabad BranchIslamic Azad University Najafabad Iran
- Department of Nano Materials and Nano Coatings, Institute for ColorScience and Technology (ICST) Tehran Iran
| | - Seyed A. Hassanzadeh‐Tabrizi
- Advanced Materials Research Center, Department of Materials Engineering, Najafabad BranchIslamic Azad University Najafabad Iran
| | - Amir M. Arabi
- Department of Nano Materials and Nano Coatings, Institute for ColorScience and Technology (ICST) Tehran Iran
| | - Rozita Nasiri
- Isfahan Clinical Toxicology Research Center Isfahan University of Medical Sciences Isfahan 8174673461 Iran
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8
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Zhu X, Zhang J, Liu J, Zhang Y. Recent Progress of Rare-Earth Doped Upconversion Nanoparticles: Synthesis, Optimization, and Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1901358. [PMID: 31763145 PMCID: PMC6865011 DOI: 10.1002/advs.201901358] [Citation(s) in RCA: 133] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 08/18/2019] [Indexed: 05/09/2023]
Abstract
Upconversion is a nonlinear optical phenomenon that involves the emission of high-energy photons by sequential absorption of two or more low-energy excitation photons. Due to their excellent physiochemical properties such as deep penetration depth, little damage to samples, and high chemical stability, upconversion nanoparticles (UCNPs) are extensively applied in bioimaging, biosensing, theranostic, and photochemical reactions. Here, recent achievements in the synthesis, optimization, and applications of UCNP-based nanomaterials are reviewed. The state-of-the-art approaches to synthesize UCNPs in the past few years are introduced first, followed by a summary of several strategies to optimize upconversion emissive properties and various applications of UCNPs. Lastly, the challenges and future perspectives of UCNPs are provided as a conclusion.
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Affiliation(s)
- Xiaohui Zhu
- School of Environmental and Chemical EngineeringShanghai University99 Shangda Road, Baoshan DistrictShanghai200444China
| | - Jing Zhang
- School of Environmental and Chemical EngineeringShanghai University99 Shangda Road, Baoshan DistrictShanghai200444China
| | - Jinliang Liu
- School of Environmental and Chemical EngineeringShanghai University99 Shangda Road, Baoshan DistrictShanghai200444China
| | - Yong Zhang
- School of Environmental and Chemical EngineeringShanghai University99 Shangda Road, Baoshan DistrictShanghai200444China
- Department of Biomedical EngineeringFaculty of EngineeringNational University of SingaporeBlock E4 #04‐08, 4 Engineering Drive 3Singapore117583Singapore
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Avram D, Tiseanu I, Vasile BS, Florea M, Tiseanu C. Near infrared emission properties of Er doped cubic sesquioxides in the second/third biological windows. Sci Rep 2018; 8:18033. [PMID: 30575789 PMCID: PMC6303399 DOI: 10.1038/s41598-018-36639-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 11/21/2018] [Indexed: 11/17/2022] Open
Abstract
In the recent years, there is an extensive effort concentrated towards the development of nanoparticles with near-infrared emission within the so called second or third biological windows induced by excitation outside 800-1000 nm range corresponding to the traditional Nd (800 nm) and Yb (980 nm) sensitizers. Here, we present a first report on the near-infrared (900-1700 nm) emission of significant member of cubic sesquioxides, Er-Lu2O3 nanoparticles, measured under both near-infrared up-conversion and low energy X-ray excitations. The nanoparticle compositions are optimized by varying Er concentration and Li addition. It is found that, under ca. 1500 nm up-conversion excitation, the emission is almost monochromatic (>93%) and centered at 980 nm while over 80% of the X-ray induced emission is concentrated around 1500 nm. The mechanisms responsible for the up-conversion emission of Er - Lu2O3 are identified by help of the up-conversion emission and excitation spectra as well as emission decays considering multiple excitation/emission transitions across visible to near-infrared ranges. Comparison between the emission properties of Er-Lu2O3 and Er-Y2O3 induced by optical and X-ray excitation is also presented. Our results suggest that the further optimized Er-doped cubic sesquioxides represent promising candidates for bioimaging and photovoltaic applications.
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Affiliation(s)
- Daniel Avram
- National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG-36, RO 76900, Bucharest, Magurele, Romania
- University of Bucharest, Faculty of Physics, 405 Atomistilor Street, 077125, Magurele, Ilfov, Romania
| | - Ion Tiseanu
- National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG-36, RO 76900, Bucharest, Magurele, Romania
| | - Bogdan S Vasile
- University POLITEHNICA from Bucharest, National Research Center for Food Safety, 313 Splaiul Independentei Street, RO 060042, Bucharest, Romania
| | - Mihaela Florea
- National Institute of Materials Physics, 405A Atomistilor Street, 077125, Magurele, Ilfov, Romania
| | - Carmen Tiseanu
- National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG-36, RO 76900, Bucharest, Magurele, Romania.
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10
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Lin H, Xu D, Li Y, Yao L, Xu L, Ma Y, Yang S, Zhang Y. Enhanced Red Emission in Er 3+-Sensitized NaLuF 4 Upconversion Crystals via Energy Trapping. Inorg Chem 2018; 57:15361-15369. [PMID: 30480436 DOI: 10.1021/acs.inorgchem.8b02654] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Luminescence efficiency of trivalent lanthanide-doped upconversion (UC) materials is significantly limited by luminescence concentration quenching. In this work, red UC emission is dramatically enhanced in Er3+-sensitized NaLuF4 UC crystals through energy trapping under multiple excitation wavelengths. Cross-relaxation quenching and the energy migration to internal lattice defects are simultaneously suppressed by confining the excitation energy in the Er3+ activator after introducing the Tm3+ or Ho3+ energy trapping center. The enhanced red UC emission (Er3+: 660 nm) mainly comes from the effective excitation energy confinement by Tm3+ and Ho3+ trapping centers through an easy energy transfer between Er3+ and Tm3+/Ho3+: 4I11/2 (Er3+) → 3H5 (Tm3+) → 4I13/2 (Er3+) and 4I11/2 (Er3+) → 5I6 (Ho3+) → 4I13/2 (Er3+). It is found that the confining efficiency of excitation energy in Er3+-sensitized NaLuF4 crystals is higher than that in Yb3+/Er3+ cosensitized NaLuF4 crystals, and the luminescence efficiency of Er3+-sensitized NaLuF4 crystals is much higher than that of Er3+-based host sensitization UC crystals (NaErF4). Moreover, Er3+-sensitized UC particles can be efficiently excited by three different wavelengths (808, 980, and 1532 nm), indicating huge advantages for applications in bioimaging, anticounterfeiting, and solar cells.
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Affiliation(s)
- Hao Lin
- School of Physics and Electronic Engineering , Guangzhou University , Guangzhou 510006 , P. R. China
| | - Dekang Xu
- School of Chemistry and Materials Engineering , Huizhou University , Huizhou 516007 , P. R. China
| | - Yongjin Li
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering/School of Physics , Sun Yat-sen University , Guangzhou 510275 , P. R. China
| | - Lu Yao
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering/School of Physics , Sun Yat-sen University , Guangzhou 510275 , P. R. China
| | - Liqin Xu
- School of Physics and Electronic Engineering , Guangzhou University , Guangzhou 510006 , P. R. China
| | - Ying Ma
- School of Physics and Electronic Engineering , Guangzhou University , Guangzhou 510006 , P. R. China
| | - Shenghong Yang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering/School of Physics , Sun Yat-sen University , Guangzhou 510275 , P. R. China
| | - Yueli Zhang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering/School of Physics , Sun Yat-sen University , Guangzhou 510275 , P. R. China
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11
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Liu G, Sun Z, Fu Z, Ma L, Wang X. Temperature sensing and bio-imaging applications based on polyethylenimine/CaF2 nanoparticles with upconversion fluorescence. Talanta 2017; 169:181-188. [DOI: 10.1016/j.talanta.2017.03.054] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/13/2017] [Accepted: 03/17/2017] [Indexed: 01/26/2023]
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12
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Wang X, Wang Y, Marques-Hueso J, Yan X. Improving Optical Temperature Sensing Performance of Er 3+ Doped Y 2O 3 Microtubes via Co-doping and Controlling Excitation Power. Sci Rep 2017; 7:758. [PMID: 28389639 PMCID: PMC5429693 DOI: 10.1038/s41598-017-00838-w] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 03/15/2017] [Indexed: 02/05/2023] Open
Abstract
This work presents a new method to effectively improve the optical temperature behavior of Er3+ doped Y2O3 microtubes by co-doping of Tm3+ or Ho3+ ion and controlling excitation power. The influence of Tm3+ or Ho3+ ion on optical temperature behavior of Y2O3:Er3+ microtubes is investigated by analyzing the temperature and excitation power dependent emission spectra, thermal quenching ratios, fluorescence intensity ratios, and sensitivity. It is found that the thermal quenching of Y2O3:Er3+ microtubes is inhibited by co-doping with Tm3+ or Ho3+ ion, moreover the maximum sensitivity value based on the thermal coupled 4S3/2/2H11/2 levels is enhanced greatly and shifts to the high temperature range, while the maximum sensitivity based on 4F9/2(1)/4F9/2(2) levels shifts to the low temperature range and greatly increases. The sensitivity values are dependent on the excitation power, and reach two maximum values of 0.0529/K at 24 K and 0.0057/K at 457 K for the Y2O3:1%Er3+, 0.5%Ho3+ at 121 mW/mm2 excitation power, which makes optical temperature measurement in wide temperature range possible. The mechanism of changing the sensitivity upon different excitation densities is discussed.
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Affiliation(s)
- Xiangfu Wang
- College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210023, People's Republic of China.
| | - Ye Wang
- College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210023, People's Republic of China
| | - Jose Marques-Hueso
- Institute of Sensors, Signals and Systems, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Xiaohong Yan
- College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210023, People's Republic of China. .,School of Material Science and Engineering, Jiangsu University, Zhenjiang, 212013, People's Republic of China. .,College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, People's Republic of China.
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13
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Li H, Hao S, Yang C, Chen G. Synthesis of Multicolor Core/Shell NaLuF₄:Yb 3+/Ln 3+@CaF₂ Upconversion Nanocrystals. NANOMATERIALS 2017; 7:nano7020034. [PMID: 28336867 PMCID: PMC5333019 DOI: 10.3390/nano7020034] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 01/25/2017] [Accepted: 02/03/2017] [Indexed: 02/07/2023]
Abstract
The ability to synthesize high-quality hierarchical core/shell nanocrystals from an efficient host lattice is important to realize efficacious photon upconversion for applications ranging from bioimaging to solar cells. Here, we describe a strategy to fabricate multicolor core @ shell α-NaLuF4:Yb3+/Ln3+@CaF2 (Ln = Er, Ho, Tm) upconversion nanocrystals (UCNCs) based on the newly established host lattice of sodium lutetium fluoride (NaLuF4). We exploited the liquid-solid-solution method to synthesize the NaLuF4 core of pure cubic phase and the thermal decomposition approach to expitaxially grow the calcium fluoride (CaF2) shell onto the core UCNCs, yielding cubic core/shell nanocrystals with a size of 15.6 ± 1.2 nm (the core ~9 ± 0.9 nm, the shell ~3.3 ± 0.3 nm). We showed that those core/shell UCNCs could emit activator-defined multicolor emissions up to about 772 times more efficient than the core nanocrystals due to effective suppression of surface-related quenching effects. Our results provide a new paradigm on heterogeneous core/shell structure for enhanced multicolor upconversion photoluminescence from colloidal nanocrystals.
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Affiliation(s)
- Hui Li
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering & Key Laboratory of Micro-systems and Micro-Structures, Ministry of Education, Harbin Institute of Technology, Harbin 150001, China.
| | - Shuwei Hao
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering & Key Laboratory of Micro-systems and Micro-Structures, Ministry of Education, Harbin Institute of Technology, Harbin 150001, China.
| | - Chunhui Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering & Key Laboratory of Micro-systems and Micro-Structures, Ministry of Education, Harbin Institute of Technology, Harbin 150001, China.
| | - Guanying Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering & Key Laboratory of Micro-systems and Micro-Structures, Ministry of Education, Harbin Institute of Technology, Harbin 150001, China.
- Institute for Lasers, Photonics and Biophotonics, State University of New York at Buffalo, Buffalo, NY 14260, USA.
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14
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Lin H, Xu D, Li A, Qiu Z, Yang S, Zhang Y. Enhanced red upconversion emission and its mechanism in Yb3+–Er3+ codoped α-NaLuF4 nanoparticles. NEW J CHEM 2017. [DOI: 10.1039/c6nj03008d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Red upconversion luminescence is greatly enhanced through manipulation of the initial solution pH.
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Affiliation(s)
- Hao Lin
- State Key Laboratory of Optoelectronic Materials and Technologies
- School of Materials Science and Engineering
- School of Physics
- Sun Yat-sen University
- Guangzhou 510275
| | - Dekang Xu
- State Key Laboratory of Optoelectronic Materials and Technologies
- School of Materials Science and Engineering
- School of Physics
- Sun Yat-sen University
- Guangzhou 510275
| | - Anming Li
- State Key Laboratory of Optoelectronic Materials and Technologies
- School of Materials Science and Engineering
- School of Physics
- Sun Yat-sen University
- Guangzhou 510275
| | - Zhiren Qiu
- State Key Laboratory of Optoelectronic Materials and Technologies
- School of Materials Science and Engineering
- School of Physics
- Sun Yat-sen University
- Guangzhou 510275
| | - Shenghong Yang
- State Key Laboratory of Optoelectronic Materials and Technologies
- School of Materials Science and Engineering
- School of Physics
- Sun Yat-sen University
- Guangzhou 510275
| | - Yueli Zhang
- State Key Laboratory of Optoelectronic Materials and Technologies
- School of Materials Science and Engineering
- School of Physics
- Sun Yat-sen University
- Guangzhou 510275
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