All-optical nanoscale pH meter.
Nano Lett
; 6(8): 1687-92, 2006 Aug.
Article
em En
| MEDLINE
| ID: mdl-16895357
ABSTRACT
We show that an Au nanoshell with a pH-sensitive molecular adsorbate functions as a standalone, all-optical nanoscale pH meter that monitors its local environment through the pH-dependent surface-enhanced Raman scattering (SERS) spectra of the adsorbate molecules. Moreover, we also show how the performance of such a functional nanodevice can be assessed quantitatively. The complex spectral output is reduced to a simple device characteristic by application of a locally linear manifold approximation algorithm. The average accuracy of the nano-"meter" was found to be +/-0.10 pH units across its operating range.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Análise Espectral Raman
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Transdutores
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Nanotecnologia
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Óptica e Fotônica
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Concentração de Íons de Hidrogênio
Tipo de estudo:
Diagnostic_studies
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Evaluation_studies
Idioma:
En
Revista:
Nano Lett
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Estados Unidos
País de publicação:
EEUU
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ESTADOS UNIDOS
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ESTADOS UNIDOS DA AMERICA
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EUA
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UNITED STATES
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UNITED STATES OF AMERICA
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US
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USA