Local field effect on luminescent properties of organic molecule-doped silica nanoparticles

Anjun Huang; Ka-Leung Wong; Peter A. Tanner

doi:10.1016/j.omx.2021.100073

Local field effect on luminescent properties of organic molecule-doped silica nanoparticles

Anjun Huang
, Ka-Leung Wong^*
, Peter A. Tanner^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

2 Citations (Scopus)

Abstract

The local field effect involves the modification of the spontaneous emission rate of an emitting center in a nanoparticle (NP) due to its environment which modifies the photon density of states and the electric field acting within the NP. We are unaware of reports of this effect for organic molecules so that we encapsulated a green dye and a porphyrin in a silica shell and dispersed these in media of different refractive index. The emission decays were monoexponential so that the calculated lifetimes could be fitted by a model recently employed for the local field effect. It was found that a good fit was achieved for the smaller NPs employed, indicating the importance of the effect, but the effect was not important for the larger NPs where different behavior was observed due to agglomeration. © 2021 The Authors

Original language	English
Article number	100073
Journal	Optical Materials: X
Volume	10
Online published	17 Jun 2021
DOIs	https://doi.org/10.1016/j.omx.2021.100073
Publication status	Published - 2021
Externally published	Yes

Funding

K.-L.W acknowledges financial support from the Durham- HKBU joint laboratory and the Staff Development Fund from HKBU , SDF19-1011-P02; Dr. Mok Man Hung Endowed Professor in Chemistry from HKBU; and Hong Kong Research Grants Council grant HKBU 12300320 .

Research Keywords

Chemical interaction
HPTS
Local field effect
Silica coating

Publisher's Copyright Statement

This full text is made available under CC-BY-NC-ND 4.0. https://creativecommons.org/licenses/by-nc-nd/4.0/

RGC Funding Information

RGC-funded

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title = "Local field effect on luminescent properties of organic molecule-doped silica nanoparticles",

abstract = "The local field effect involves the modification of the spontaneous emission rate of an emitting center in a nanoparticle (NP) due to its environment which modifies the photon density of states and the electric field acting within the NP. We are unaware of reports of this effect for organic molecules so that we encapsulated a green dye and a porphyrin in a silica shell and dispersed these in media of different refractive index. The emission decays were monoexponential so that the calculated lifetimes could be fitted by a model recently employed for the local field effect. It was found that a good fit was achieved for the smaller NPs employed, indicating the importance of the effect, but the effect was not important for the larger NPs where different behavior was observed due to agglomeration. {\textcopyright} 2021 The Authors",

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language = "English",

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journal = "Optical Materials: X",

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T1 - Local field effect on luminescent properties of organic molecule-doped silica nanoparticles

AU - Huang, Anjun

AU - Wong, Ka-Leung

AU - Tanner, Peter A.

PY - 2021

Y1 - 2021

N2 - The local field effect involves the modification of the spontaneous emission rate of an emitting center in a nanoparticle (NP) due to its environment which modifies the photon density of states and the electric field acting within the NP. We are unaware of reports of this effect for organic molecules so that we encapsulated a green dye and a porphyrin in a silica shell and dispersed these in media of different refractive index. The emission decays were monoexponential so that the calculated lifetimes could be fitted by a model recently employed for the local field effect. It was found that a good fit was achieved for the smaller NPs employed, indicating the importance of the effect, but the effect was not important for the larger NPs where different behavior was observed due to agglomeration. © 2021 The Authors

AB - The local field effect involves the modification of the spontaneous emission rate of an emitting center in a nanoparticle (NP) due to its environment which modifies the photon density of states and the electric field acting within the NP. We are unaware of reports of this effect for organic molecules so that we encapsulated a green dye and a porphyrin in a silica shell and dispersed these in media of different refractive index. The emission decays were monoexponential so that the calculated lifetimes could be fitted by a model recently employed for the local field effect. It was found that a good fit was achieved for the smaller NPs employed, indicating the importance of the effect, but the effect was not important for the larger NPs where different behavior was observed due to agglomeration. © 2021 The Authors

KW - Chemical interaction

KW - HPTS

KW - Local field effect

KW - Silica coating

UR - https://www.scopus.com/pages/publications/85108610021

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U2 - 10.1016/j.omx.2021.100073

DO - 10.1016/j.omx.2021.100073

M3 - RGC 21 - Publication in refereed journal

SN - 2590-1478

VL - 10

JO - Optical Materials: X

JF - Optical Materials: X

M1 - 100073

ER -

Local field effect on luminescent properties of organic molecule-doped silica nanoparticles

Abstract

Funding

Research Keywords

Publisher's Copyright Statement

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