Optoelectronic Vibrational Characterization of Photoactive Single-Molecule Devices
Abstract
Title: Optoelectronic Vibrational Characterization of Photoactive Single-Molecule DevicesObjective: The overarching goal of this project to advance the forefront of single-molecule electronics, with the following specific objectives:~ Understand the interplay between electrically and optically excited vibrational modes in a single-molecule junction in order to obtain a spectrum of optically-excited phonon modes that is verifiably due to a single molecule bound to two electrodes.~ Examine the correlation between junction configuration and the conductance properties of single-molecule devices.~ Determine the effects of electric field, current density, and heating on the configuration of single-molecule photo-switching devices using combined optoelectronic vibrational characterization techniques.Approach: To achieve the goals of this project, PI will obtain comprehensive information about structure-transport relationships in single-molecule systems by combining Raman spectroscopy with single-molecule charge transport measurements in order to: i) obtain direct mapping of specific device configurations to conductance values; ii) explore dynamic changes in device structure due to electric fields and charge transport; and iii) study in situ configurational effects inphotoactive electronic devices such as single-molecule photos-witches.SOW: To achieve the objective of the research project, PI will carry out the following specific tasks: 1. Integration of Raman spectroscopy with STM break junction technique;2. Measure electrically and optically excited vibrational modes, including single-molecule Raman measurements and examination of Anti-Stokes Raman shift;3. Study correlation between configuration and conductance, via configurational mapping of single-molecule devices; 4. Characterize optoelectronic properties photo-switching devices (photo-active molecular switches, bia and current effects on molecular switches). Merit and Relevance: Electronic warfare has become an increasingly important aspect of the Navy~s mission in recent years, and success in this arena requires that the armed services have the most advanced electronic capabilities. The continued minimization of electronic devices will require significant advances in our ability to control the atomic-level configuration, the power density, and energy conversion processes, to optimize and understand the functional paradigms in unique atomic-scale devices, and to develop new metrology capabilities that will allow these studies.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141612658
Entities
People
- Joshua Hihath
Organizations
- Office of Naval Research
- United States Navy
- University of California, Davis