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Colloidal photoemissive nanoparticles

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Abstract

Nanoparticles possess distinctive properties compared to those of their bulk counterparts. They can be prepared as colloids using molecules which play a key role in their preparation, colloidal stability, functionality, and/or optical features. These molecules can act as solvents, surfactants, reactants and ligands. Photoactive nanoparticles exhibit unique optical features due to the combined effect of their nanometric scale and the derived quantum confinement effect. The degree and type of response to size is related to their composition. They can form either colourless or colourful colloids, emit light either at longer wavelengths than those of the absorbed light (down-conversion luminescence) or at shorter wavelengths (up-conversion luminescence). In addition, the nanostructures can exhibit enhanced properties compared with their bulk counterparts, (for example, superior chemical sensing) due to their intrinsic large surface/volume ratio and their functionality can be further enhanced by ligand exchange or modification. Moreover, the processability of colloidal nanoparticles is crucial to many of their applications, such as for light-emitting devices and in optoelectronics, among other applications.

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Fig. 1

Adapted from Ref. [6] Copyright 2016 American Chemical Society

Fig. 2

Adapted with permission from Ref. [6] Copyright (2010) American Chemical and Ref. [9] The Royal Society of Chemistry

Fig. 3

Image adapted from Ref. [13] Copyright 2017, Springer Nature

Fig. 4

Image adapted with permission from Ref. [18] Copyright (2006) American Chemical Society

Fig. 5
Fig. 6

Adapted with permission from Ref. [27] Copyright 2016 American Chemical Society

Fig. 7

Reprinted with permission from Ref. [39] Copyright 2017 American Chemical Society

Fig. 8

Reproduced by permission of The Royal Society of Chemistry

Fig. 9

Reproduced by permission of The Royal Society of Chemistry

Fig. 10

Reproduced from [50] with permission Copyright 2017, John Wiley and Sons

Fig. 11

Reproduced from Ref. [53] Copyright 2017, Springer Nature

Fig. 12

Reprinted with permission from Ref. [55] Copyright (2008) American Chemical Society

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Acknowledgements

We thank the Spanish Ministry of Economy and Competitiveness (projects CTQ2014-60174-P (and Grant to SGC), partially co-financed with FEDER funds, and Maria de Maeztu MDM-2015-0538) for funding support.

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  1. Universitat de Valencia, C/Catedrático José Beltrán, 2, 46980, Paterna, Valencia, Spain

    Soranyel González-Carrero & Julia Pérez-Prieto

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González-Carrero, S., Pérez-Prieto, J. Colloidal photoemissive nanoparticles. ChemTexts 4, 8 (2018). https://doi.org/10.1007/s40828-018-0063-2

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