期刊
NANO LETTERS
卷 6, 期 8, 页码 1687-1692出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl060865w
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- NIDDK NIH HHS [1 T90 DK070121-01] Funding Source: Medline
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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