1
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Liu Y, Duan B, Zhou L, Wu Y, Wang F, Ding C, Hu J. Large enhancement of red upconversion luminescence in beta Ba 2Sc 0.67Yb 0.3Er 0.03AlO 5 phosphor via Mn 2+ ions doping for thermometry. Sci Rep 2024; 14:8893. [PMID: 38632459 PMCID: PMC11024212 DOI: 10.1038/s41598-024-59732-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 04/15/2024] [Indexed: 04/19/2024] Open
Abstract
Here, this study reports single-band red upconversion emission in β-Ba2ScAlO5: Yb3+/Er3+ phosphor by doping Mn2+. The optimum concentration of Mn2+ ions in β-Ba2ScAlO5: Yb3+/Er3+ phosphor was 0.20. The intensity of red and green emissions is increased by 27.4 and 19.3 times, respectively. Compared with the samples without Mn2+ ions, the red-green integral strength ratio of β-Ba2ScAlO5: Yb3+/Er3+/Mn2+ sample was significantly increased by 28.4 times, reaching 110.9. The UCL mechanism was explored by analyzing the down-conversion luminescence spectra, absorption spectra, UCL spectra, and upconversion fluorescence lifetime decay curves of Yb3+/Er3+/Mn2+ co-doped β-Ba2ScAlO5. The enhancement of upconversion red light is achieved through energy transfer between defect bands and Er3+ ions, as well as energy transfer between Mn2+ ions and Er3+ ions. In addition, the Mn2+ doped β-Ba2ScAlO5: Yb3+/Er3+ red UCL phosphors have great potential for ambient temperature sensing in the 298-523 K temperature range. The maximum sensitivity of β-Ba2ScAlO5: Yb3+/Er3+/Mn2+ phosphor as a temperature sensor at 523 K is 0.0247 K-1.
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Affiliation(s)
- Yongtao Liu
- School of Science, Xihua University, Chengdu, 610039, China
| | - Bin Duan
- School of Science, Xihua University, Chengdu, 610039, China
| | - Lin Zhou
- School of Science, Xihua University, Chengdu, 610039, China
| | - Yuxiang Wu
- School of Science, Xihua University, Chengdu, 610039, China
| | - Fengyi Wang
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Changchun Ding
- School of Science, Xihua University, Chengdu, 610039, China
| | - Junshan Hu
- School of Science, Xihua University, Chengdu, 610039, China.
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2
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Matulionyte M, Skripka A, Ramos-Guerra A, Benayas A, Vetrone F. The Coming of Age of Neodymium: Redefining Its Role in Rare Earth Doped Nanoparticles. Chem Rev 2023; 123:515-554. [PMID: 36516409 DOI: 10.1021/acs.chemrev.2c00419] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Among luminescent nanostructures actively investigated in the last couple of decades, rare earth (RE3+) doped nanoparticles (RENPs) are some of the most reported family of materials. The development of RENPs in the biomedical framework is quickly making its transition to the ∼800 nm excitation pathway, beneficial for both in vitro and in vivo applications to eliminate heating and facilitate higher penetration in tissues. Therefore, reports and investigations on RENPs containing the neodymium ion (Nd3+) greatly increased in number as the focus on ∼800 nm radiation absorbing Nd3+ ion gained traction. In this review, we cover the basics behind the RE3+ luminescence, the most successful Nd3+-RENP architectures, and highlight application areas. Nd3+-RENPs, particularly Nd3+-sensitized RENPs, have been scrutinized by considering the division between their upconversion and downshifting emissions. Aside from their distinctive optical properties, significant attention is paid to the diverse applications of Nd3+-RENPs, notwithstanding the pitfalls that are still to be addressed. Overall, we aim to provide a comprehensive overview on Nd3+-RENPs, discussing their developmental and applicative successes as well as challenges. We also assess future research pathways and foreseeable obstacles ahead, in a field, which we believe will continue witnessing an effervescent progress in the years to come.
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Affiliation(s)
- Marija Matulionyte
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, Université du Québec, Varennes, Québec J3X 1P7, Canada
| | - Artiom Skripka
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, Université du Québec, Varennes, Québec J3X 1P7, Canada
| | - Alma Ramos-Guerra
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, Université du Québec, Varennes, Québec J3X 1P7, Canada
| | - Antonio Benayas
- Department of Physics and CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal.,Molecular Imaging Program at Stanford Department of Radiology Stanford University 1201 Welch Road, Lucas Center (exp.), Stanford, California 94305-5484, United States
| | - Fiorenzo Vetrone
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, Université du Québec, Varennes, Québec J3X 1P7, Canada
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3
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Zhang Z, Skripka A, Dahl JC, Dun C, Urban JJ, Jaque D, Schuck PJ, Cohen BE, Chan EM. Tuning Phonon Energies in Lanthanide-doped Potassium Lead Halide Nanocrystals for Enhanced Nonlinearity and Upconversion. Angew Chem Int Ed Engl 2023; 62:e202212549. [PMID: 36377596 DOI: 10.1002/anie.202212549] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 11/11/2022] [Accepted: 11/14/2022] [Indexed: 11/16/2022]
Abstract
Optical applications of lanthanide-doped nanoparticles require materials with low phonon energies to minimize nonradiative relaxation and promote nonlinear processes like upconversion. Heavy halide hosts offer low phonon energies but are challenging to synthesize as nanocrystals. Here, we demonstrate the size-controlled synthesis of low-phonon-energy KPb2 X5 (X=Cl, Br) nanoparticles and the ability to tune nanocrystal phonon energies as low as 128 cm-1 . KPb2 Cl5 nanoparticles are moisture resistant and can be efficiently doped with lighter lanthanides. The low phonon energies of KPb2 X5 nanoparticles promote upconversion luminescence from higher lanthanide excited states and enable highly nonlinear, avalanche-like emission from KPb2 Cl5 : Nd3+ nanoparticles. The realization of nanoparticles with tunable, ultra-low phonon energies facilitates the discovery of nanomaterials with phonon-dependent properties, precisely engineered for applications in nanoscale imaging, sensing, luminescence thermometry and energy conversion.
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Affiliation(s)
- Zhuolei Zhang
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Load, Wuhan, 430074, China.,The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Artiom Skripka
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,Nanomaterials for Bioimaging Group (nanoBIG), Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Jakob C Dahl
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,Department of Chemistry, University of California at Berkeley, Berkeley, CA 94720, USA
| | - Chaochao Dun
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Jeffrey J Urban
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Daniel Jaque
- Nanomaterials for Bioimaging Group (nanoBIG), Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - P James Schuck
- Department of Mechanical Engineering, Columbia University, New York, NY 10027, USA
| | - Bruce E Cohen
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,Division of Molecular Biophysics & Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Emory M Chan
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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4
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Labrador-Páez L, Kostiv U, Liu Q, Li Y, Ågren H, Widengren J, Liu H. Excitation Pulse Duration Response of Upconversion Nanoparticles and Its Applications. J Phys Chem Lett 2022; 13:11208-11215. [PMID: 36445720 PMCID: PMC9743204 DOI: 10.1021/acs.jpclett.2c03037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 11/21/2022] [Indexed: 06/16/2023]
Abstract
Lanthanide-doped upconversion nanoparticles (UCNPs) have rich photophysics exhibiting complex luminescence kinetics. In this work, we thoroughly investigated the luminescence response of UCNPs to excitation pulse durations. Analyzing this response opens new opportunities in optical encoding/decoding and the assignment of transitions to emission peaks and provides advantages in applications of UCNPs, e.g., for better optical sectioning and improved luminescence nanothermometry. Our work shows that monitoring the UCNP luminescence response to excitation pulse durations (while keeping the duty cycle constant) by recording the average luminescence intensity using a low-time resolution detector such as a spectrometer offers a powerful approach for significantly extending the utility of UCNPs.
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Affiliation(s)
- Lucía Labrador-Páez
- Department
of Applied Physics, KTH Royal Institute
of Technology, SE-10691Stockholm, Sweden
| | - Uliana Kostiv
- Department
of Applied Physics, KTH Royal Institute
of Technology, SE-10691Stockholm, Sweden
| | - Qingyun Liu
- Department
of Theoretical Chemistry and Biology, KTH
Royal Institute of Technology, SE-10691Stockholm, Sweden
| | - Yuanyuan Li
- Wallenberg
Wood Science Center, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-10691Stockholm, Sweden
| | - Hans Ågren
- Department
of Physics and Astronomy, Uppsala University, UppsalaSE-75120, Sweden
| | - Jerker Widengren
- Department
of Applied Physics, KTH Royal Institute
of Technology, SE-10691Stockholm, Sweden
| | - Haichun Liu
- Department
of Applied Physics, KTH Royal Institute
of Technology, SE-10691Stockholm, Sweden
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5
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Zhang B, Kong T, Zhang C, Mi X, Chen H, Guo X, Zhou X, Ji M, Fu Z, Zhang Z, Zheng H. Plasmon driven nanocrystal transformation in low temperature environments. NANOSCALE 2022; 14:16314-16320. [PMID: 36305203 DOI: 10.1039/d2nr03887k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The preparation and modification of crystal structures in cryogenic environments with conventional methods is challenging, but it is essential for the development of composite materials, energy savings, and future human space exploration. Plasmon induced hot carriers and local thermal effects help to overcome the challenges of chemical reactions under extreme conditions, for which molecular reactions have attracted considerable research attention. In this work, the plasmon thermal effect enables fast and efficient nanocrystal transformation in cryogenic environments, which was previously unattainable with conventional heating methods. The transformation of NaYF4 nanocrystals on gold nanoparticle island films can be achieved even in a low temperature environment of 11 K. Compared with the structure with gold nanoparticles adhered to NaYF4 nanocrystals directly, the structure of gold nanoparticle island films with an Al2O3 layer offered better heat trapping properties, which allows the complete transformation to take place of NaYF4 nanocrystals into Y2O3 nanocrystals in low temperature environments. This work explores the potential of applying the photothermal effect of a plasmon to induce rapid transformation of nanocrystals in extreme environments and provides insight into the process of crystal transformation and growth.
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Affiliation(s)
- Baobao Zhang
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Ting Kong
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Chengyun Zhang
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Xiaohu Mi
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Huan Chen
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Xiaojun Guo
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Xilin Zhou
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Min Ji
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Zhengkun Fu
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Zhenglong Zhang
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Hairong Zheng
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
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6
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Zhang Y, Wen R, Hu J, Guan D, Qiu X, Zhang Y, Kohane DS, Liu Q. Enhancement of single upconversion nanoparticle imaging by topologically segregated core-shell structure with inward energy migration. Nat Commun 2022; 13:5927. [PMID: 36207318 PMCID: PMC9546905 DOI: 10.1038/s41467-022-33660-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 09/27/2022] [Indexed: 11/09/2022] Open
Abstract
Manipulating topological arrangement is a powerful tool for tuning energy migration in natural photosynthetic proteins and artificial polymers. Here, we report an inorganic optical nanosystem composed of NaErF4 and NaYbF4, in which topological arrangement enhanced upconversion luminescence. Three architectures are designed for considerations pertaining to energy migration and energy transfer within nanoparticles: outside-in, inside-out, and local energy transfer. The outside-in architecture produces the maximum upconversion luminescence, around 6-times brighter than that of the inside-out at the single-particle level. Monte Carlo simulation suggests a topology-dependent energy migration favoring the upconversion luminescence of outside-in structure. The optimized outside-in structure shows more than an order of magnitude enhancement of upconversion brightness compared to the conventional core-shell structure at the single-particle level and is used for long-term single-particle tracking in living cells. Our findings enable rational nanoprobe engineering for single-molecule imaging and also reveal counter-intuitive relationships between upconversion nanoparticle structure and optical properties.
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Affiliation(s)
- Yanxin Zhang
- grid.8547.e0000 0001 0125 2443Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 China
| | - Rongrong Wen
- grid.8547.e0000 0001 0125 2443Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 China
| | - Jialing Hu
- grid.8547.e0000 0001 0125 2443Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 China
| | - Daoming Guan
- grid.8547.e0000 0001 0125 2443Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 China
| | - Xiaochen Qiu
- grid.8547.e0000 0001 0125 2443Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 China
| | - Yunxiang Zhang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China.
| | - Daniel S. Kohane
- grid.38142.3c000000041936754XLaboratory for Biomaterials and Drug Delivery, Division of Critical Care Medicine, Children’s Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115 USA
| | - Qian Liu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China.
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7
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Cheng X, Zhou J, Yue J, Wei Y, Gao C, Xie X, Huang L. Recent Development in Sensitizers for Lanthanide-Doped Upconversion Luminescence. Chem Rev 2022; 122:15998-16050. [PMID: 36194772 DOI: 10.1021/acs.chemrev.1c00772] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The attractive features of lanthanide-doped upconversion luminescence (UCL), such as high photostability, nonphotobleaching or photoblinking, and large anti-Stokes shift, have shown great potentials in life science, information technology, and energy materials. Therefore, UCL modulation is highly demanded toward expected emission wavelength, lifetime, and relative intensity in order to satisfy stringent requirements raised from a wide variety of areas. Unfortunately, the majority of efforts have been devoted to either simple codoping of multiple activators or variation of hosts, while very little attention has been paid to the critical role that sensitizers have been playing. In fact, different sensitizers possess different excitation wavelengths and different energy transfer pathways (to different activators), which will lead to different UCL features. Thus, rational design of sensitizers shall provide extra opportunities for UCL tuning, particularly from the excitation side. In this review, we specifically focus on advances in sensitizers, including the current status, working mechanisms, design principles, as well as future challenges and endeavor directions.
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Affiliation(s)
- Xingwen Cheng
- Institute of Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing211816, China
| | - Jie Zhou
- Institute of Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing211816, China
| | - Jingyi Yue
- Institute of Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing211816, China
| | - Yang Wei
- Institute of Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing211816, China
| | - Chao Gao
- Institute of Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing211816, China
| | - Xiaoji Xie
- Institute of Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing211816, China
| | - Ling Huang
- Institute of Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing211816, China.,State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi830046, China
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8
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Kumar J, Roy I. Highly Selective and Sensitive Ratiometric Detection of Sn 2+ Ions Using NIR-Excited Rhodamine-B-Linked Upconversion Nanophosphors. ACS OMEGA 2022; 7:29840-29849. [PMID: 36061706 PMCID: PMC9434793 DOI: 10.1021/acsomega.2c02671] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
Detection of Sn2+ ions in environmental and biological samples is essential owing to the toxicological risk posed by excess use tin worldwide. Herein, we have designed a nanoprobe involving upconversion nanophosphors linked with a rhodamine-based fluorophore, which is selectively sensitive to the presence of Sn2+ ions. Upon excitation with near-infrared (NIR) light, the green emission of the nanophosphor is reabsorbed by the fluorophore with an efficiency that varies directly with the concentration of the Sn2+ ions. We have explored this NIR-excited fluorescence resonance energy transfer (FRET) process for the quantitative and ratiometric detection of Sn2+ ions in an aqueous phase. We have observed an excellent linear correlation between the ratiometric emission signal variation and the Sn2+ ion concentration in the lower micromolar range. The detection limit of Sn2+ ions observed using our FRET-based nanoprobe is about 10 times lower than that observed using other colorimetric or fluorescence-based techniques. Due to the minimal autofluorescence and great penetration depth of NIR light, this method is ideally suited for the selective and ultrasensitive detection of Sn2+ ions in complex biological or environmental samples.
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9
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Zalogina A, Tonkaev P, Tripathi A, Lee HC, Carletti L, Park HG, Kruk SS, Kivshar Y. Enhanced Five-Photon Photoluminescence in Subwavelength AlGaAs Resonators. NANO LETTERS 2022; 22:4200-4206. [PMID: 35561257 DOI: 10.1021/acs.nanolett.2c01122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Multiphoton processes of absorption photoluminescence have enabled a wide range of applications including three-dimensional microfabrication, data storage, and biological imaging. While the applications of two-photon and three-photon absorption and luminescence have matured considerably, higher-order photoluminescence processes remain more challenging to study due to their lower efficiency, particularly in subwavelength systems. Here, we report the observation of five-photon luminescence from a single subwavelength nanoantenna at room temperature enabled by the Mie resonances. We excite an AlGaAs resonator at around 3.6 μm and observe photoluminescence at around 740 nm. We show that the interplay of the Mie multipolar modes at the subwavelength scale can enhance the efficiency of the five-photon luminescence by at least 4 orders of magnitude, being limited only by sensitivity of our detector. Our work paves the way toward applications of higher-order multiphoton processes at the subwavelength scales enabled by the physics of Mie resonances.
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Affiliation(s)
- Anastasiia Zalogina
- Nonlinear Physics Center, Research School of Physics, Australian National University, Canberra ACT, 2601, Australia
| | - Pavel Tonkaev
- Nonlinear Physics Center, Research School of Physics, Australian National University, Canberra ACT, 2601, Australia
| | - Aditya Tripathi
- Nonlinear Physics Center, Research School of Physics, Australian National University, Canberra ACT, 2601, Australia
| | - Hoo-Cheol Lee
- Department of Physics, Korea University, Seoul 02841, Republic of Korea
| | - Luca Carletti
- Department of Information Engineering, University of Brescia, Brescia 25123, Italy
| | - Hong-Gyu Park
- Department of Physics, Korea University, Seoul 02841, Republic of Korea
| | - Sergey S Kruk
- Nonlinear Physics Center, Research School of Physics, Australian National University, Canberra ACT, 2601, Australia
- Department of Physics, Paderborn University, 33098 Paderborn, Germany
| | - Yuri Kivshar
- Nonlinear Physics Center, Research School of Physics, Australian National University, Canberra ACT, 2601, Australia
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10
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McLellan CA, Siefe C, Casar JR, Peng CS, Fischer S, Lay A, Parakh A, Ke F, Gu XW, Mao W, Chu S, Goodman MB, Dionne JA. Engineering Bright and Mechanosensitive Alkaline-Earth Rare-Earth Upconverting Nanoparticles. J Phys Chem Lett 2022; 13:1547-1553. [PMID: 35133831 PMCID: PMC9587901 DOI: 10.1021/acs.jpclett.1c03841] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Upconverting nanoparticles (UCNPs) are an emerging platform for mechanical force sensing at the nanometer scale. An outstanding challenge in realizing nanometer-scale mechano-sensitive UCNPs is maintaining a high mechanical force responsivity in conjunction with bright optical emission. This Letter reports mechano-sensing UCNPs based on the lanthanide dopants Yb3+ and Er3+, which exhibit a strong ratiometric change in emission spectra and bright emission under applied pressure. We synthesize and analyze the pressure response of five different types of nanoparticles, including cubic NaYF4 host nanoparticles and alkaline-earth host materials CaLuF, SrLuF, SrYbF, and BaLuF, all with lengths of 15 nm or less. By combining optical spectroscopy in a diamond anvil cell with single-particle brightness, we determine the noise equivalent sensitivity (GPa/√Hz) of these particles. The SrYb0.72Er0.28F@SrLuF particles exhibit an optimum noise equivalent sensitivity of 0.26 ± 0.04 GPa/√Hz. These particles present the possibility of robust nanometer-scale mechano-sensing.
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Affiliation(s)
- Claire A McLellan
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Chris Siefe
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Jason R Casar
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Chunte Sam Peng
- Department of Physics, Stanford University, Stanford, California 94305, United States
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, United States
| | - Stefan Fischer
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Alice Lay
- Department of Applied Physics, Stanford University, Stanford, California 94305, United States
| | - Abhinav Parakh
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Feng Ke
- Department of Geological Sciences, Stanford University, Stanford, California 94305, United States
| | - X Wendy Gu
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Wendy Mao
- Department of Geological Sciences, Stanford University, Stanford, California 94305, United States
| | - Steven Chu
- Department of Physics, Stanford University, Stanford, California 94305, United States
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, United States
| | - Miriam B Goodman
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, United States
| | - Jennifer A Dionne
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
- Department of Radiology, Stanford University, Stanford, California 94305, United States
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11
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Liao J, Zhou J, Song Y, Liu B, Lu J, Jin D. Optical Fingerprint Classification of Single Upconversion Nanoparticles by Deep Learning. J Phys Chem Lett 2021; 12:10242-10248. [PMID: 34647739 DOI: 10.1021/acs.jpclett.1c02923] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Highly controlled synthesis of upconversion nanoparticles (UCNPs) can be achieved in the heterogeneous design, so that a library of optical properties can be arbitrarily produced by depositing multiple lanthanide ions. Such a control offers the potential in creating nanoscale barcodes carrying high-capacity information. With the increasing creation of optical information, it poses more challenges in decoding them in an accurate, high-throughput, and speedy fashion. Here, we reported that the deep-learning approach can recognize the complexity of the optical fingerprints from different UCNPs. Under a wide-field microscope, the lifetime profiles of hundreds of single nanoparticles can be collected at once, which offers a sufficient amount of data to develop deep-learning algorithms. We demonstrated that high accuracies of over 90% can be achieved in classifying 14 kinds of UCNPs. This work suggests new opportunities in handling the diverse properties of nanoscale optical barcodes toward the establishment of vast luminescent information carriers.
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Affiliation(s)
- Jiayan Liao
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, NSW 2007, Australia
| | - Jiajia Zhou
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, NSW 2007, Australia
| | - Yiliao Song
- Australian Artificial Intelligence Institute, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Baolei Liu
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, NSW 2007, Australia
| | - Jie Lu
- Australian Artificial Intelligence Institute, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Dayong Jin
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, NSW 2007, Australia
- UTS-SUStech Joint Research Centre for Biomedical Materials & Devices, Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China
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12
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Chen Y, Shimoni O, Huang G, Wen S, Liao J, Duong HTT, Maddahfar M, Su QP, Ortega DG, Lu Y, Campbell DH, Walsh BJ, Jin D. Upconversion nanoparticle-assisted single-molecule assay for detecting circulating antigens of aggressive prostate cancer. Cytometry A 2021; 101:400-410. [PMID: 34585823 DOI: 10.1002/cyto.a.24504] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/06/2021] [Accepted: 09/20/2021] [Indexed: 01/22/2023]
Abstract
Sensitive and quantitative detection of molecular biomarkers is crucial for the early diagnosis of diseases like metabolic syndrome and cancer. Here we present a single-molecule sandwich immunoassay by imaging the number of single nanoparticles to diagnose aggressive prostate cancer. Our assay employed the photo-stable upconversion nanoparticles (UCNPs) as labels to detect the four types of circulating antigens in blood circulation, including glypican-1 (GPC-1), leptin, osteopontin (OPN), and vascular endothelial growth factor (VEGF), as their serum concentrations indicate aggressive prostate cancer. Under a wide-field microscope, a single UCNP doped with thousands of lanthanide ions can emit sufficiently bright anti-Stokes' luminescence to become quantitatively detectable. By counting every single streptavidin-functionalized UCNP which specifically labeled on each sandwich immune complex across multiple fields of views, we achieved the Limit of Detection (LOD) of 0.0123 ng/ml, 0.2711 ng/ml, 0.1238 ng/ml, and 0.0158 ng/ml for GPC-1, leptin, OPN and VEGF, respectively. The serum circulating level of GPC-1, leptin, OPN, and VEGF in a mixture of 10 healthy normal human serum was 25.17 ng/ml, 18.04 ng/ml, 11.34 ng/ml, and 1.55 ng/ml, which was within the assay dynamic detection range for each analyte. Moreover, a 20% increase of GPC-1 and OPN was observed by spiking the normal human serum with recombinant antigens to confirm the accuracy of the assay. We observed no cross-reactivity among the four biomarker analytes, which eliminates the false positives and enhances the detection accuracy. The developed single upconversion nanoparticle-assisted single-molecule assay suggests its potential in clinical usage for prostate cancer detection by monitoring tiny concentration differences in a panel of serum biomarkers.
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Affiliation(s)
- Yinghui Chen
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - Olga Shimoni
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - Guan Huang
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - Shihui Wen
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - Jiayan Liao
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - Hien T T Duong
- The School of Pharmacy, The University of Sydney, New South Wales, Australia
| | - Mahnaz Maddahfar
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - Qian Peter Su
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
| | - David Gallego Ortega
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
- School of Biomedical Engineering, Faculty of Engineering and IT, University of Technology Sydney, Ultimo, New South Wales, Australia
| | - Yanling Lu
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
- Minomic International Ltd, Macquarie Park, New South Wales, Australia
| | - Douglas H Campbell
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
- Minomic International Ltd, Macquarie Park, New South Wales, Australia
| | - Bradley J Walsh
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
- Minomic International Ltd, Macquarie Park, New South Wales, Australia
| | - Dayong Jin
- Institute for Biomedical Materials and Devices, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, New South Wales, Australia
- ARC Research Hub for Integrated Device for End-user Analysis at Low-levels (IDEAL), Faculty of Science, University of Technology Sydney, New South Wales, Australia
- UTS-SUStech Joint Research Centre for Biomedical Materials & Devices, Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, China
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Liao J, Zhou J, Song Y, Liu B, Chen Y, Wang F, Chen C, Lin J, Chen X, Lu J, Jin D. Preselectable Optical Fingerprints of Heterogeneous Upconversion Nanoparticles. NANO LETTERS 2021; 21:7659-7668. [PMID: 34406016 DOI: 10.1021/acs.nanolett.1c02404] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The control in optical uniformity of single nanoparticles and tuning their diversity in multiple dimensions, dot to dot, holds the key to unlocking nanoscale applications. Here we report that the entire lifetime profile of the single upconversion nanoparticle (τ2 profile) can be resolved by confocal, wide-field, and super-resolution microscopy techniques. The advances in both spatial and temporal resolutions push the limit of optical multiplexing from microscale to nanoscale. We further demonstrate that the time-domain optical fingerprints can be created by utilizing nanophotonic upconversion schemes, including interfacial energy migration, concentration dependency, energy transfer, and isolation of surface quenchers. We exemplify that three multiple dimensions, including the excitation wavelength, emission color, and τ2 profile, can be built into the nanoscale derivative τ2-dots. Creating a vast library of individually preselectable nanotags opens up a new horizon for diverse applications, spanning from sub-diffraction-limit data storage to high-throughput single-molecule digital assays and super-resolution imaging.
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Affiliation(s)
- Jiayan Liao
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Jiajia Zhou
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Yiliao Song
- Centre for Artificial Intelligence, Faculty of Engineering and IT, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Baolei Liu
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Yinghui Chen
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Fan Wang
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Chaohao Chen
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Jun Lin
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China
| | - Xueyuan Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China
| | - Jie Lu
- Centre for Artificial Intelligence, Faculty of Engineering and IT, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Dayong Jin
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, New South Wales 2007, Australia
- UTS-SUStech Joint Research Centre for Biomedical Materials & Devices, Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, People's Republic of China
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14
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Ferreira FDS, de Morais AJ, Santos Calado CM, Iikawa F, Couto Junior ODD, Brunet G, Murugesu M, Mazali IO, Sigoli FA. Dual magnetic field and temperature optical probes of controlled crystalline phases in lanthanide-doped multi-shell nanoparticles. NANOSCALE 2021; 13:14723-14733. [PMID: 34477629 DOI: 10.1039/d1nr03796j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The engineering of core@multi-shell nanoparticles containing heterogeneous crystalline phases in different layers constitutes an important strategy for obtaining optical probes. The possibility of obtaining an opto-magnetic core@multi-shell nanoparticle capable of emitting in the visible and near-infrared ranges by upconversion and downshifting processes is highly desirable, especially when its optical responses are dependent on temperature and magnetic field variations. This work proposes the synthesis of hierarchically structured core@multi-shell nanoparticles of heterogeneous crystalline phases: a cubic core containing DyIII ions responsible for magnetic properties and optically active hexagonal shells, where ErIII, YbIII, and NdIII ions were distributed. This system shows at least three excitation energies located at different biological windows, and its emission intensities are sensitive to temperature and external magnetic field variations. The selected crystalline phases of the core@multi-shell nanoparticles obtained in this work is fundamental to the development of multifunctional materials with potential applications as temperature and magnetic field optical probes.
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Affiliation(s)
- Flavia de Sousa Ferreira
- Institute of Chemistry - University of Campinas - UNICAMP, P.O. Box 6154, Campinas, Sao Paulo 13083-970, Brazil.
| | - Amanda Justino de Morais
- Institute of Chemistry - University of Campinas - UNICAMP, P.O. Box 6154, Campinas, Sao Paulo 13083-970, Brazil.
| | | | - Fernando Iikawa
- Institute of Physics "Gleb Wataghin" - University of Campinas - UNICAMP, P.O. Box 6165, Campinas, Sao Paulo 13083-970, Brazil
| | - Odilon D D Couto Junior
- Institute of Physics "Gleb Wataghin" - University of Campinas - UNICAMP, P.O. Box 6165, Campinas, Sao Paulo 13083-970, Brazil
| | - Gabriel Brunet
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Italo O Mazali
- Institute of Chemistry - University of Campinas - UNICAMP, P.O. Box 6154, Campinas, Sao Paulo 13083-970, Brazil.
| | - Fernando A Sigoli
- Institute of Chemistry - University of Campinas - UNICAMP, P.O. Box 6154, Campinas, Sao Paulo 13083-970, Brazil.
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15
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Six-photon upconverted excitation energy lock-in for ultraviolet-C enhancement. Nat Commun 2021; 12:4367. [PMID: 34272390 PMCID: PMC8285497 DOI: 10.1038/s41467-021-24664-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 06/21/2021] [Indexed: 11/24/2022] Open
Abstract
Photon upconversion of near-infrared (NIR) irradiation into ultraviolet-C (UVC) emission offers many exciting opportunities for drug release in deep tissues, photodynamic therapy, solid-state lasing, energy storage, and photocatalysis. However, NIR-to-UVC upconversion remains a daunting challenge due to low quantum efficiency. Here, we report an unusual six-photon upconversion process in Gd3+/Tm3+-codoped nanoparticles following a heterogeneous core-multishell architecture. This design efficiently suppresses energy consumption induced by interior energy traps, maximizes cascade sensitizations of the NIR excitation, and promotes upconverted UVC emission from high-lying excited states. We realized the intense six-photon-upconverted UV emissions at 253 nm under 808 nm excitation. This work provides insight into mechanistic understanding of the upconversion process within the heterogeneous architecture, while offering exciting opportunities for developing nanoscale UVC emitters that can be remotely controlled through deep tissues upon NIR illumination. Photon upconversion with near-infrared excitation and ultraviolet emission has many applications, but suffers from low quantum efficiency. Here, the authors report a six-photon upconversion process in nanoparticles with heterogeneous core-multishell structure, that regulate the energy transfer pathway.
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16
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Chen C, Liu B, Liu Y, Liao J, Shan X, Wang F, Jin D. Heterochromatic Nonlinear Optical Responses in Upconversion Nanoparticles for Super-Resolution Nanoscopy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2008847. [PMID: 33864638 DOI: 10.1002/adma.202008847] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/03/2021] [Indexed: 05/22/2023]
Abstract
Point spread function (PSF) engineering by an emitter's response can code higher-spatial-frequency information of an image for microscopy to achieve super-resolution. However, complexed excitation optics or repetitive scans are needed, which explains the issues of low speed, poor stability, and operational complexity associated with the current laser scanning microscopy approaches. Here, the diverse emission responses of upconversion nanoparticles (UCNPs) are reported for super-resolution nanoscopy to improve the imaging quality and speed. The method only needs a doughnut-shaped scanning excitation beam at an appropriate power density. By collecting the four-photon emission of single UCNPs, the high-frequency information of a super-resolution image can be resolved through the doughnut-emission PSF. Meanwhile, the two-photon state of the same nanoparticle is oversaturated, so that the complementary lower-frequency information of the super-resolution image can be simultaneously collected by the Gaussian-like emission PSF. This leads to a method of Fourier-domain heterochromatic fusion, which allows the extended capability of the engineered PSFs to cover both low- and high-frequency information to yield optimized image quality. This approach achieves a spatial resolution of 40 nm, 1/24th of the excitation wavelength. This work suggests a new scope for developing nonlinear multi-color emitting probes in super-resolution nanoscopy.
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Affiliation(s)
- Chaohao Chen
- Institute for Biomedical Materials & Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Baolei Liu
- Institute for Biomedical Materials & Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Yongtao Liu
- Institute for Biomedical Materials & Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Jiayan Liao
- Institute for Biomedical Materials & Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Xuchen Shan
- Institute for Biomedical Materials & Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Fan Wang
- Institute for Biomedical Materials & Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
- School of Electrical and Data Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Dayong Jin
- Institute for Biomedical Materials & Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
- UTS-SUStech Joint Research Centre for Biomedical Materials & Devices, Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
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17
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Casar JR, McLellan CA, Siefe C, Dionne JA. Lanthanide-Based Nanosensors: Refining Nanoparticle Responsiveness for Single Particle Imaging of Stimuli. ACS PHOTONICS 2021; 8:3-17. [PMID: 34307765 PMCID: PMC8297747 DOI: 10.1021/acsphotonics.0c00894] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Lanthanide nanoparticles (LNPs) are promising sensors of chemical, mechanical, and temperature changes; they combine the narrow-spectral emission and long-lived excited states of individual lanthanide ions with the high spatial resolution and controlled energy transfer of nanocrystalline architectures. Despite considerable progress in optimizing LNP brightness and responsiveness for dynamic sensing, detection of stimuli with a spatial resolution approaching that of individual nanoparticles remains an outstanding challenge. Here, we highlight the existing capabilities and outstanding challenges of LNP sensors, en-route to nanometer-scale, single particle sensor resolution. First, we summarize LNP sensor read-outs, including changes in emission wavelength, lifetime, intensity, and spectral ratiometric values that arise from modified energy transfer networks within nanoparticles. Then, we describe the origins of LNP sensor imprecision, including sensitivity to competing conditions, interparticle heterogeneities, such as the concentration and distribution of dopant ions, and measurement noise. Motivated by these sources of signal variance, we describe synthesis characterization feedback loops to inform and improve sensor precision, and introduce noise-equivalent sensitivity as a figure of merit of LNP sensors. Finally, we project the magnitudes of chemical and pressure stimulus resolution achievable with single LNPs at nanoscale resolution. Our perspective provides a roadmap for translating ensemble LNP sensing capabilities to the single particle level, enabling nanometer-scale sensing in biology, medicine, and sustainability.
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Affiliation(s)
- Jason R Casar
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Claire A McLellan
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Chris Siefe
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Jennifer A Dionne
- Department of Materials Science and Engineering and Department of Radiology, Molecular Imaging Program, Stanford University, Stanford, California 94305, United States
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18
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Krishnan R, Menon SG, Poelman D, Kroon RE, Swart HC. Power-dependent upconversion luminescence properties of self-sensitized Er 2WO 6 phosphor. Dalton Trans 2021; 50:229-239. [PMID: 33295910 DOI: 10.1039/d0dt03081c] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A Yb3+ free self-sensitized Er2WO6 phosphor has been synthesized via a solid-state reaction method. The phosphor material, Er2WO6, has a monoclinic crystal structure with space group P2/c (13). The deconvoluted high-resolution X-ray photoelectron spectra of all the core elements in the Er2WO6 phosphor material were explored. The highly resolved absorption peaks in the ultra-violet, visible and near-infra-red (NIR) regions of the diffuse reflectance spectrum were due to the Stark-splitting of the 4f energy levels of the Er3+ ions. Under 980 nm NIR laser excitation, the Er2WO6 phosphor showed an intense up-converted red emission at 677 nm due to the 4F9/2→4I15/2 transitions of the Er3+ ions. The cross-relaxation and resonance energy transfer process involved in the key intermediate 4F3/2 and 4F5/2 levels of the Er3+ and their role in generating red emissions were investigated. The laser pump power versus upconversion intensity plot showed a slope with an n value <1 and the possible reasons behind this behavior were investigated. The photoluminescence properties of the Er2WO6 phosphor in the visible and NIR region were further analyzed. The potential application of the phosphor as a marker in latent fingerprint detection was also evaluated.
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Affiliation(s)
- Rajagopalan Krishnan
- Department of Physics, University of the Free State, Bloemfontein, 9301, South Africa.
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