期刊
NANO LETTERS
卷 14, 期 2, 页码 495-498出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl403485e
关键词
Transition metal oxides; surface-enhanced Raman scattering (SERS); nanoparticles; plasmons; interfacial reactions
类别
资金
- EPSRC [EP/H028757/1, EP/H028757/2]
- Engineering and Physical Sciences Research Council [EP/H028757/2, EP/H028757/1] Funding Source: researchfish
- EPSRC [EP/H028757/2, EP/H028757/1] Funding Source: UKRI
Probing ion-intercalating processes in electrodes is hugely important for batteries, supercapacitors, and photovoltaic devices. In this work we use single-nanoparticle (NP) probes to see real-time molecular changes correlated to electrochemically modulated ion-intercalation in metal-oxide electrodes. Using surface-enhanced Raman spectroscopy (SERS) transduced by single NP probes, we observe that the Raman frequencies and spectral intensities of the adsorbed molecules vary on cycling the electrochemical potential on a vanadium-oxide electrode. The potential-dependent frequency shifts in SERS from an electrochemically inert molecule are attributed to a Stark effect induced by chemical and structural changes as a result of ion-intercalation processes in vanadium oxide. Our study opens up a unique strategy to explore adsorbates and molecular reaction pathways on ion-intercalating materials and semiconducting interfaces.
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