Nanojet trapping of a single sub-10 nm upconverting nanoparticle in the full liquid water temperature range
Upconverting nanoparticles (UCNPs) have been used as optical probes in agreat variety of scenarios ranging from cells to animal models. When opti-cally trapped, a single UCNP can be remotely manipulated making possible, for instance, thermal scanning in the surroundings of a living cell. When conven...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/738700 |
| Acceso en línea: | https://hdl.handle.net/10486/738700 https://dx.doi.org/10.1002/smll.202006764 |
| Access Level: | acceso abierto |
| Palabra clave: | Nanoparticles optical trapping photonic nanojet thermal stability upconversion Física |
| Sumario: | Upconverting nanoparticles (UCNPs) have been used as optical probes in agreat variety of scenarios ranging from cells to animal models. When opti-cally trapped, a single UCNP can be remotely manipulated making possible, for instance, thermal scanning in the surroundings of a living cell. When conventional optics is used, the stability of an optically trapped UCNP is verylimited. Its reduced size leads to optical potentials comparable to thermalenergy, and up to now, stable optical trapping of a UCNP has been demon-strated only close to room temperature. This fact limits their use above roomtemperature, for instance, the use to investigate protein denaturalization thatoccurs in the 40–50 °C range. In this work, stable optical trapping of a single UCNP in the 20–90 °C range has been demonstrated by using a photonic nanojet. The use of an optically trapped microsphere makes it possible to overcome the diffraction limit producing another optical trap of smaller size and enhanced strength. This simple strategy leads not only to an improve-ment in the thermal stability of the optical trap but also to an enhancement of the emission intensity generated by the optically trapped UCNP |
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