All-optical nanoscale pH meter

Sandra W Bishnoi; Christopher J Rozell; Carly S Levin; Muhammed K Gheith; Bruce R Johnson; Don H Johnson; Naomi J. Halas

doi:10.1021/nl060865w

All-optical nanoscale pH meter

Sandra W Bishnoi, Christopher J Rozell, Carly S Levin, Muhammed K Gheith, Bruce R Johnson, Don H Johnson, Naomi J. Halas

Research output: Contribution to journal › Article › peer-review

318 Scopus citations

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.

Original language	English (US)
Pages (from-to)	1687-92
Number of pages	6
Journal	Nano Letters
Volume	6
Issue number	8
DOIs	https://doi.org/10.1021/nl060865w
State	Published - Aug 2006

Keywords

Equipment Design
Equipment Failure Analysis
Hydrogen-Ion Concentration
Nanotechnology
Optics and Photonics
Reproducibility of Results
Sensitivity and Specificity
Spectrum Analysis, Raman
Surface Properties
Transducers
Evaluation Studies
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

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10.1021/nl060865w

Cite this

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title = "All-optical nanoscale pH meter",

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.",

keywords = "Equipment Design, Equipment Failure Analysis, Hydrogen-Ion Concentration, Nanotechnology, Optics and Photonics, Reproducibility of Results, Sensitivity and Specificity, Spectrum Analysis, Raman, Surface Properties, Transducers, Evaluation Studies, Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S.",

author = "Bishnoi, {Sandra W} and Rozell, {Christopher J} and Levin, {Carly S} and Gheith, {Muhammed K} and Johnson, {Bruce R} and Johnson, {Don H} and Halas, {Naomi J.}",

year = "2006",

month = aug,

doi = "10.1021/nl060865w",

language = "English (US)",

volume = "6",

pages = "1687--92",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "8",

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TY - JOUR

T1 - All-optical nanoscale pH meter

AU - Bishnoi, Sandra W

AU - Rozell, Christopher J

AU - Levin, Carly S

AU - Gheith, Muhammed K

AU - Johnson, Bruce R

AU - Johnson, Don H

AU - Halas, Naomi J.

PY - 2006/8

Y1 - 2006/8

N2 - 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.

AB - 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.

KW - Equipment Design

KW - Equipment Failure Analysis

KW - Hydrogen-Ion Concentration

KW - Nanotechnology

KW - Optics and Photonics

KW - Reproducibility of Results

KW - Sensitivity and Specificity

KW - Spectrum Analysis, Raman

KW - Surface Properties

KW - Transducers

KW - Evaluation Studies

KW - Journal Article

KW - Research Support, N.I.H., Extramural

KW - Research Support, Non-U.S. Gov't

KW - Research Support, U.S. Gov't, Non-P.H.S.

U2 - 10.1021/nl060865w

DO - 10.1021/nl060865w

M3 - Article

C2 - 16895357

SN - 1530-6984

VL - 6

SP - 1687

EP - 1692

JO - Nano Letters

JF - Nano Letters

IS - 8

ER -

All-optical nanoscale pH meter

Abstract

Keywords

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