Voltage-Driven Conformational Switching with Distinct Raman Signature in a Single-Molecule Junction

• DOI: 10.1021/jacs.7b12818
• Publication Date: 2018-03-22T18:21:51Z
• Authors: Hai Bi; Carlos-Andres Palma; Yuxiang Gong; Peter Hasch; Mark Elbing; Marcel Mayor; Joachim Reichert; Johannes V. Barth
• Keywords: Molecular Electronics; Break junction; Molecular switch

Precisely controlling well-defined, stable single-molecule junctions represents a pillar of electronics. Early attempts to establish computing with molecular switching arrays were partly challenged by limitations in the direct chemical characterization metal–molecule–metal junctions. While cryogenic scanning probe studies have advanced mechanistic understanding current- and voltage-induced conformational switching, conformations are still largely inferred from indirect evidence. Hence, development robust, chemically sensitive techniques is instrumental for advancement field. Here we conformation two-state switch vibrational spectroscopy, while simultaneously operating it means applied voltage. Our study emphasizes measurements Raman spectra room-temperature presenting signal modulation nearly 2 orders magnitude.