Fluorescence excitation enhancement by waveguiding nanowires
Unksov, Ivan N. LU ; Anttu, Nicklas ; Verardo, Damiano LU ; Höök, Fredrik ; Prinz, Christelle N. LU and Linke, Heiner LU
(2023)
In Nanoscale Advances
5(6).
p.1760-1766
- Abstract
The optical properties of vertical semiconductor nanowires can allow an enhancement of fluorescence from surface-bound fluorophores, a feature proven useful in biosensing. One of the contributing factors to the fluorescence enhancement is thought to be the local increase of the incident excitation light intensity in the vicinity of the nanowire surface, where fluorophores are located. However, this effect has not been experimentally studied in detail to date. Here, we quantify the excitation enhancement of fluorophores bound to a semiconductor nanowire surface by combining modelling with measurements of fluorescence photobleaching rate, indicative of the excitation light intensity, using epitaxially grown GaP nanowires. We study the... (More)
The optical properties of vertical semiconductor nanowires can allow an enhancement of fluorescence from surface-bound fluorophores, a feature proven useful in biosensing. One of the contributing factors to the fluorescence enhancement is thought to be the local increase of the incident excitation light intensity in the vicinity of the nanowire surface, where fluorophores are located. However, this effect has not been experimentally studied in detail to date. Here, we quantify the excitation enhancement of fluorophores bound to a semiconductor nanowire surface by combining modelling with measurements of fluorescence photobleaching rate, indicative of the excitation light intensity, using epitaxially grown GaP nanowires. We study the excitation enhancement for nanowires with a diameter of 50-250 nm and show that excitation enhancement reaches a maximum for certain diameters, depending on the excitation wavelength. Furthermore, we find that the excitation enhancement decreases rapidly within tens of nanometers from the nanowire sidewall. The results can be used to design nanowire-based optical systems with exceptional sensitivities for bioanalytical applications.
(Less)
- author
- Unksov, Ivan N.
LU
; Anttu, Nicklas
; Verardo, Damiano
LU
; Höök, Fredrik
; Prinz, Christelle N.
LU
and Linke, Heiner
LU
- organization
- publishing date
- 2023-02-20
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nanoscale Advances
- volume
- 5
- issue
- 6
- pages
- 7 pages
- publisher
- Royal Society of Chemistry
- external identifiers
-
- scopus:85149273365
- pmid:36926575
- ISSN
- 2516-0230
- DOI
- 10.1039/d2na00749e
- language
- English
- LU publication?
- yes
- id
- 7fc7ac87-d956-4cff-88e0-acb3b1bc833b
- date added to LUP
- 2024-01-12 14:15:39
- date last changed
- 2024-04-27 09:36:55
@article{7fc7ac87-d956-4cff-88e0-acb3b1bc833b,
abstract = {{<p>The optical properties of vertical semiconductor nanowires can allow an enhancement of fluorescence from surface-bound fluorophores, a feature proven useful in biosensing. One of the contributing factors to the fluorescence enhancement is thought to be the local increase of the incident excitation light intensity in the vicinity of the nanowire surface, where fluorophores are located. However, this effect has not been experimentally studied in detail to date. Here, we quantify the excitation enhancement of fluorophores bound to a semiconductor nanowire surface by combining modelling with measurements of fluorescence photobleaching rate, indicative of the excitation light intensity, using epitaxially grown GaP nanowires. We study the excitation enhancement for nanowires with a diameter of 50-250 nm and show that excitation enhancement reaches a maximum for certain diameters, depending on the excitation wavelength. Furthermore, we find that the excitation enhancement decreases rapidly within tens of nanometers from the nanowire sidewall. The results can be used to design nanowire-based optical systems with exceptional sensitivities for bioanalytical applications.</p>}},
author = {{Unksov, Ivan N. and Anttu, Nicklas and Verardo, Damiano and Höök, Fredrik and Prinz, Christelle N. and Linke, Heiner}},
issn = {{2516-0230}},
language = {{eng}},
month = {{02}},
number = {{6}},
pages = {{1760--1766}},
publisher = {{Royal Society of Chemistry}},
series = {{Nanoscale Advances}},
title = {{Fluorescence excitation enhancement by waveguiding nanowires}},
url = {{http://dx.doi.org/10.1039/d2na00749e}},
doi = {{10.1039/d2na00749e}},
volume = {{5}},
year = {{2023}},
}