Tapered Mach-Zehnder interferometer based on PbS quantum dots modified by polymers for copper ion sensing.
Appl Opt
; 60(16): 4807-4813, 2021 Jun 01.
Article
em En
| MEDLINE
| ID: mdl-34143033
An optical fiber interferometer coated with PbS quantum dots (QDs) was developed for copper ion (${{\rm{Cu}}^{2 +}}$) detection. The QDs were modified by a multifunctional copolymer that enabled QD surface ligation, dispersion, and coordination with ${{\rm{Cu}}^{2 +}}$. ${{\rm{Cu}}^{2 +}}$ coordination with the polymer induced changes in the surrounding refractive index of the interferometer. The sensor was highly selective for ${{\rm{Cu}}^{2 +}}$ and showed a linear detection range of 0-1000 µM with a limit of detection of 2.20 µM in both aqueous and biological solutions.
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1
Base de dados:
MEDLINE
Assunto principal:
Polímeros
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Sulfetos
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Técnicas Biossensoriais
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Cobre
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Pontos Quânticos
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Interferometria
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Chumbo
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article