Preprint Article Version 1 This version is not peer-reviewed

Up-Conversion Luminescence Properties of Lanthanide-Gold Hybrid Nanoparticles as Analyzed with Discrete Dipole Approximation

Version 1 : Received: 6 November 2018 / Approved: 7 November 2018 / Online: 7 November 2018 (09:34:20 CET)

A peer-reviewed article of this Preprint also exists.

Lv, R.; Feng, M.; Parak, W.J. Up-Conversion Luminescence Properties of Lanthanide-Gold Hybrid Nanoparticles as Analyzed with Discrete Dipole Approximation. Nanomaterials 2018, 8, 989. Lv, R.; Feng, M.; Parak, W.J. Up-Conversion Luminescence Properties of Lanthanide-Gold Hybrid Nanoparticles as Analyzed with Discrete Dipole Approximation. Nanomaterials 2018, 8, 989.

Journal reference: Nanomaterials 2018, 8, 989
DOI: 10.3390/nano8120989

Abstract

Up-conversion nanoparticles (UCNP) under near-infrared (NIR) light irradiation have been well investigated in the field of bio-imaging. However, the low up-conversion luminescence (UCL) intensity limits applications. Plasmatic modulation has been proposed as an effective tool to adjust the luminescence intensity and lifetime. In this study discrete dipole approximation (DDA) was explored concerning guiding the design of [email protected] structures with enhanced UCL intensity. The extinction effects of gold shells could be changed by adjusting the distance between the UCNPs and the Au NPs by synthesized tunable mesoporous silica (mSiO2) spacers. Enhanced UCL was obtained under 808 nm irradiation. Theoretical predictions could not be demonstrated to full extend by experimental data, indicating that better models for simulation need to better take into account inhomogeneities in particle morphologies.

Subject Areas

discrete dipole approximation (DDA); up-conversion nanoparticles (UCNP); lanthanide-gold

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