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| Autor: | Sara Bals, Rafael Valiente, Miriam Martínez-Flórez, Ada Herrero, Luis M. Liz-Marzán, Dorleta Jimenez de Aberasturi, Mikhail Mychinko, Carlos Renero-Lecuna |
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| Přispěvatelé: | European Commission, Universidad de Cantabria |
| Rok vydání: | 2021 |
| Předmět: |
media_common.quotation_subject
chemistry.chemical_element 02 engineering and technology Public administration 010402 general chemistry 01 natural sciences Article fluorescent nanothermometers Excellence Political science Lanthanum luminescence European commission Physical and Theoretical Chemistry media_common European research Physics 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Chemistry General Energy Work (electrical) chemistry 0210 nano-technology Engineering sciences. Technology |
| Zdroj: | Addi. Archivo Digital para la Docencia y la Investigación instname Journal Of Physical Chemistry C The journal of physical chemistry: C : nanomaterials and interfaces The Journal of Physical Chemistry. C, Nanomaterials and Interfaces Journal of Physical Chemistry C, 2021, 125, 19887-19896 UCrea Repositorio Abierto de la Universidad de Cantabria Universidad de Cantabria (UC) |
| ISSN: | 1932-7447 |
| Popis: | The development of optical nanothermometers operating in the near-infrared (NIR) is of high relevance toward temperature measurements in biological systems. We propose herein the use of Nd3+-doped lanthanum oxychloride nanocrystals as an efficient system with intense photoluminescence under NIR irradiation in the first biological transparency window and emission in the second biological window with excellent emission stability over time under 808 nm excitation, regardless of Nd3+ concentration, which can be considered as a particular strength of our system. Additionally, surface passivation through over-growth of an inert LaOCl shell around optically active LaOCl/Nd3+ cores was found to further enhance the photoluminescence intensity and also the lifetime of the 1066 nm, F-4(3/2) to I-4(11/2) transition, without affecting its (ratiometric) sensitivity toward temperature changes. As required for biological applications, we show that the obtained (initially hydrophobic) nanocrystals can be readily transferred into aqueous solvents with high, long-term stability, through either ligand exchange or encapsulation with an amphiphilic polymer. The authors thank the financial support of the European Research Council (ERC-AdG-2017 787510, ERC-CoG-2019 815128) and of the European Commission (EUSMI, Grant 731019). This work was performed under the Maria de Maeztu Units of Excellence Program from the Spanish State Research Agency-Grant MDM-2017-0720. |
| Databáze: | OpenAIRE |
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