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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.
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Cited by
Fundamental understanding and applications of plasmon-enhanced Raman spectroscopy
Wang, X., Huang, S.-C., Hu, S., Yan, S., & Ren, B. (2020) · Nature Reviews Physics · doi:10.1038/s42254-020-0171-y · Cited by 689
Guerrini, L., & Graham, D. (2012) · Chemical Society Reviews · doi:10.1039/c2cs35118h · Cited by 441
Song, J., Zhou, J., & Duan, H. (2012) · Journal of the American Chemical Society · doi:10.1021/ja305154a · Cited by 438
Wu, X., Yang, K., He, S., Zhu, F., Kang, S., Liu, B., Sun, C., Pang, W., & Wang, Y. (2023) · Journal of Colloid and Interface Science · doi:10.1016/j.jcis.2023.05.167 · Cited by 6
Metadata
- Authors
- Bishnoi, S. W., Rozell, C. J., Levin, C. S., Gheith, M. K., Johnson, B. R., Johnson, D. H., & Halas, N. J.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2006-06-28
- Volume
- 6
- Issue
- 8
- Pages
- 1687-1692
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2066021430
- Cited by
- 346
- References
- 0
- FWCI
- 10.14
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: All-Optical Nanoscale pH Meter. https://app.cochat.ai/papers/10.1021/nl060865w
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- Bishnoi, S. W., Rozell, C. J., Levin, C. S., Gheith, M. K., Johnson, B. R., Johnson, D. H., & Halas, N. J. (2006). All-Optical Nanoscale pH Meter. Nano Letters. https://doi.org/10.1021/nl060865w
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