All-optical nanoscale pH meter (bibtex)
by , , , , , and
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 quantitatively assessed. 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.
Reference:
All-optical nanoscale pH meterS.W. Bishnoi, C.J. Rozell, C.S. Levin, M.K. Gheith, B.R. Johnson, D.H. Johnson and N.J Halas. Nano Letters, 6(8), pp. 1687–1692, August 2006.
Bibtex Entry:
@ARTICLE{bishnoi.06,
  author = 	 {Bishnoi,S.W. and Rozell,C.J. and Levin,C.S. and Gheith,M.K. and Johnson,B.R. and Johnson,D.H. and Halas, N.J},
  title = 	 {All-optical nanoscale {pH} meter},
  journal = 	 {Nano Letters},
  year = 	 {2006},
  volume = {6},
  number = {8},
  pages = {1687--1692},
  month = {August},
  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 quantitatively assessed. 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.},
 url = {http://pubs.acs.org/doi/abs/10.1021/nl060865w}
}
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