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Zhang H, Liu Y, Jin R, Han S, Su Q. Intensifying upconverted ultraviolet emission towards efficient reactive oxygen species generation. Chem Asian J 2022; 17:e202200309. [PMID: 35485415 DOI: 10.1002/asia.202200309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 04/29/2022] [Indexed: 11/10/2022]
Abstract
Multiphoton upconversion that can convert near-infrared irradiation into ultraviolet emission offers many unique opportunities for photocatalysis and phototherapy. However, the high-lying excited states of lanthanide emitters are often quenched by the interior lattice defects and deleterious interactions among different lanthanides, resulting in weak ultraviolet emission. Here, we describe a novel excitation energy lock-in approach to boost ultraviolet upconversion emission in a new class of multilayer core-shell nanoparticles with a gadolinium-rich core domain. Remarkably, we observe more than 70-fold enhancements in Gd 3+ emission from the designed nanoparticles compared with the conventional nanoparticles. Our mechanistic investigation reveals that the combination of energy migration over the core domain and optically inert NaYF 4 interlayer can effectively confine the excitation energy and thus lead to intense multiphoton ultraviolet emission in upconversion nanostructures. We further achieve a 35.6% increase in photocatalytic reactivity and 26.5% in reactive oxygen species production yield in ZnO-coated upconversion nanocomposites under 808-nm excitation. This study provides a new insight to energy transfer mechanism in lanthanide-doped nanoparticles, and offers an exciting avenue for exploring novel near-infrared photocatalysts.
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Affiliation(s)
- Haoran Zhang
- Shanghai University, Institute of Nanochemistry and Nanobiology, CHINA
| | - Yachong Liu
- Shanghai University, Institute of Nanochemistry and Nanobiology, CHINA
| | - Rong Jin
- Shanghai University, Institute of Nanochemistry and Nanobiology, CHINA
| | - Sanyang Han
- Tsinghua University, Institute of Biopharmaceutical and Health Engineering, CHINA
| | - Qianqian Su
- Shanghai University, Institute of Nanochemistry and Nanobiology, #59, No. 99, Shangda Road,, Baoshan District, 200444, Shanghai, CHINA
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Li P, Davis JL, Mays JW, Wang X, Kilbey SM. Architecture- and Composition-Controlled Self-Assembly of Block Copolymers and Binary Mixtures With Crosslinkable Components: Chain Exchange Between Block Copolymer Nanoparticles. Front Chem 2022; 10:833307. [PMID: 35281559 PMCID: PMC8906501 DOI: 10.3389/fchem.2022.833307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 01/24/2022] [Indexed: 11/13/2022] Open
Abstract
Chain exchange behaviors in self-assembled block copolymer (BCP) nanoparticles (NPs) at room temperature are investigated through observations of structural differences between parent and binary systems of BCP NPs with and without crosslinked domains. Pairs of linear diblock or triblock, and branched star-like polystyrene-poly(2-vinylpyridine) (PS-PVP) copolymers that self-assemble in a PVP-selective mixed solvent into BCP NPs with definite differences in size and self-assembled morphology are combined by diverse mixing protocols and at different crosslinking densities to reveal the impact of chain exchange between BCP NPs. Clear structural evolution is observed by dynamic light scattering and AFM and TEM imaging, especially in a blend of triblock + star copolymer BCP NPs. The changes are ascribed to the chain motion inherent in the dynamic equilibrium, which drives the system to a new structure, even at room temperature. Chemical crosslinking of PVP corona blocks suppresses chain exchange between the BCP NPs and freezes the nanostructures at a copolymer crosslinking density (CLD) of ∼9%. This investigation of chain exchange behaviors in BCP NPs having architectural and compositional complexity and the ability to moderate chain motion through tailoring the CLD is expected to be valuable for understanding the dynamic nature of BCP self-assemblies and diversifying the self-assembled structures adopted by these systems. These efforts may guide the rational construction of novel polymer NPs for potential use, for example, as drug delivery platforms and nanoreactors.
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Affiliation(s)
- Panpan Li
- Shenzhen Research Institute of Shandong University, Shenzhen, China
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan, China
| | - Jesse L. Davis
- Department of Chemistry, University of Tennessee, Knoxville, TN, United States
| | - Jimmy W. Mays
- Department of Chemistry, University of Tennessee, Knoxville, TN, United States
| | - Xu Wang
- Shenzhen Research Institute of Shandong University, Shenzhen, China
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan, China
- *Correspondence: Xu Wang, ; S. Michael Kilbey II,
| | - S. Michael Kilbey
- Department of Chemistry, University of Tennessee, Knoxville, TN, United States
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, United States
- *Correspondence: Xu Wang, ; S. Michael Kilbey II,
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Du J, Liu J, Chen Y, Zhao Y, Li Y, Miao Y. Lanthanide-doped bismuth-based nanophosphors for ratiometric upconversion optical thermometry. RSC Adv 2022; 12:8743-8749. [PMID: 35424804 PMCID: PMC8985227 DOI: 10.1039/d2ra01181f] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 03/14/2022] [Indexed: 12/28/2022] Open
Abstract
Nanothermometry could realize stable, efficient, and noninvasive temperature detection at the nanoscale. Unfortunately, most applications of nanothermometers are still limited due to their intricate synthetic process and low-temperature sensitivity. Herein, we reported a kind of novel bismuth-based upconversion nanomaterial with a fast and facile preparation strategy. The bismuth-based upconversion luminophore was synthesized by the co-precipitation method within 1 minute. By optimizing the doping ratio of the sensitizer Yb ion and the activator Er ion and adjusting the synthetic solvent strategy, the crystallinity of the nanomaterials was increased and the upconversion luminescence intensity was improved. Ratiometric upconversion optical measurements of temperature in the range of 278 K to 358 K can be achieved by ratiometric characteristic emission peaks of thermally sensitive Er ion. This method of rapidly constructing nanometer temperature probes provides a feasible strategy for the construction of novel fluorescent temperature probes. Lanthanide-doped bismuth-based nanospheres can be rapidly synthesized within 1 minute for upconversion luminescence ratiometric temperature detection.![]()
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Affiliation(s)
- Jun Du
- School of Materials and Chemistry, Institute of Bismuth and Rhenium Science, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Jinliang Liu
- School of Materials and Chemistry, Institute of Bismuth and Rhenium Science, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Ying Chen
- School of Materials and Chemistry, Institute of Bismuth and Rhenium Science, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Yuefeng Zhao
- School of Materials and Chemistry, Institute of Bismuth and Rhenium Science, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Yuhao Li
- School of Materials and Chemistry, Institute of Bismuth and Rhenium Science, University of Shanghai for Science and Technology, Shanghai 200093, China
- Shanghai Collaborative Innovation Center of Energy Therapy for Tumors, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Yuqing Miao
- School of Materials and Chemistry, Institute of Bismuth and Rhenium Science, University of Shanghai for Science and Technology, Shanghai 200093, China
- Shanghai Collaborative Innovation Center of Energy Therapy for Tumors, University of Shanghai for Science and Technology, Shanghai 200093, China
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Zhou M, Liu Y, Su Y, Su Q. Plasmonic Oxygen Defects in MO 3- x (M = W or Mo) Nanomaterials: Synthesis, Modifications, and Biomedical Applications. Adv Healthc Mater 2021; 10:e2101331. [PMID: 34549537 DOI: 10.1002/adhm.202101331] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/09/2021] [Indexed: 12/31/2022]
Abstract
Nanomedicine is a promising technology with many advantages and provides exciting opportunities for cancer diagnosis and therapy. During recent years, the newly developed oxygen-deficiency transition metal oxides MO3- x (M = W or Mo) have received significant attention due to the unique optical properties, such as strong localized surface plasmon resonance (LSPR) , tunable and broad near-IR absorption, high photothermal conversion efficiency, and large X-ray attenuation coefficient. This review presents an overview of recent advances in the development of MO3- x nanomaterials for biomedical applications. First, the fundamentals of the LSPR effect are introduced. Then, the preparation and modification methods of MO3- x nanomaterials are summarized. In addition, the biological effects of MO3- x nanomaterials are highlighted and their applications in the biomedical field are outlined. This includes imaging modalities, cancer treatment, and antibacterial capability. Finally, the prospects and challenges of MO3- x and MO3- x -based nanomaterial for fundamental studies and clinical applications are also discussed.
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Affiliation(s)
- Mingzhu Zhou
- Institute of Nanochemistry and Nanobiology Shanghai University Shanghai 200444 China
| | - Yachong Liu
- Institute of Nanochemistry and Nanobiology Shanghai University Shanghai 200444 China
| | - Yan Su
- Genome Institute of Singapore Agency of Science Technology and Research Singapore 138672 Singapore
| | - Qianqian Su
- Institute of Nanochemistry and Nanobiology Shanghai University Shanghai 200444 China
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Chien HW, Yang CH, Shih YT, Wang TL. Upconversion Nanoparticles Encapsulated with Molecularly Imprinted Amphiphilic Copolymer as a Fluorescent Probe for Specific Biorecognition. Polymers (Basel) 2021; 13:3522. [PMID: 34685278 PMCID: PMC8539580 DOI: 10.3390/polym13203522] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/07/2021] [Accepted: 10/11/2021] [Indexed: 11/30/2022] Open
Abstract
A fluorescent probe for specific biorecognition was prepared by a facile method in which amphiphilic random copolymers were encapsulated with hydrophobic upconversion nanoparticles (UCNPs). This method quickly converted the hydrophobic UCNPs to hydrophilic UNCPs. Moreover, the self-folding ability of the amphiphilic copolymers allowed the formation of molecular imprinting polymers with template-shaped cavities. LiYF4:Yb3+/Tm3+@LiYF4:Yb3+ UCNP with up-conversion emission in the visible light region was prepared; this step was followed by the synthesis of an amphiphilic random copolymer, poly(methacrylate acid-co-octadecene) (poly(MAA-co-OD)). Combining the UCNPs and poly(MAA-co-OD) with the templates afforded a micelle-like structure. After removing the templates, UCNPs encapsulated with the molecularly imprinted polymer (MIP) (UCNPs@MIP) were obtained. The adsorption capacities of UCNPs@MIP bound with albumin and hemoglobin, respectively, were compared. The results showed that albumin was more easily bound to UCNPs@MIP than to hemoglobin because of the effect of protein conformation. The feasibility of using UCNPs@MIP as a fluorescent probe was also studied. The results showed that the fluorescence was quenched when hemoglobin was adsorbed on UCNPs@MIP; however, this was not observed for albumin. This fluorescence quenching is attributed to Förster resonance energy transfer (FRET) and overlap of the absorption spectrum of hemoglobin with the fluorescence spectrum of UCNPs@MIP. To our knowledge, the encapsulation approach for fabricating the UCNPs@MIP nanocomposite, which was further used as a fluorescent probe, might be the first report on specific biorecognition.
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Affiliation(s)
- Hsiu-Wen Chien
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 807, Taiwan
| | - Chien-Hsin Yang
- Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan; (C.-H.Y.); (Y.-T.S.)
| | - Yan-Tai Shih
- Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan; (C.-H.Y.); (Y.-T.S.)
| | - Tzong-Liu Wang
- Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan; (C.-H.Y.); (Y.-T.S.)
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