Raman Scattering at Plasmonic Junctions Shorted by Conductive Molecular Bridges

Journal Article · Wed Apr 10 00:00:00 EDT 2013 · Nano Letters, 13(4):1858-1861

DOI:https://doi.org/10.1021/nl400733r· OSTI ID:1076674

El-Khoury, Patrick Z.; Hu, Dehong; Apkarian, V. Ara; Hess, Wayne P.

Intensity spikes in Raman scattering, accompanied by switching between line spectra and band spectra, can be assigned to shorting the junction plasmon through molecular conductive bridges. This is demonstrated through Raman trajectories recorded at a plasmonic junction formed by a gold AFM tip in contact with a silver surface coated either with biphenyl-4,4’-dithiol or biphenyl-4-thiol. The fluctuations are absent in the monothiol. In effect, the making and breaking of chemical bonds is tracked.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1076674
• Report Number(s): PNNL-SA-93981; 39092; 47670; KC0301020
• Journal Information: Nano Letters, 13(4):1858-1861, Journal Name: Nano Letters, 13(4):1858-1861
• Country of Publication: United States
• Language: English

Related Subjects

Tip-Enhanced Raman Scattering
Surface-Enhanced Raman Scattering
Plasmons
Conductivity limit
Tunneling
Raman Fluctuations
Quantum Limit
Environmental Molecular Sciences Laboratory