Control of topography, stress and diffusion at molecule-metal interface

TL;DR

This study investigates how microscopic topography, stress, and chemical bonding at molecule-metal interfaces influence transport properties in metal-molecule-metal junctions, revealing that short organic molecules have much lower conductivity than previously thought.

Contribution

It provides a comprehensive analysis linking interface characteristics to electrical transport, challenging existing assumptions about organic molecule conductivity.

Findings

Conductivity of ~1.5 nm organic molecules is at least 10,000 times lower than commonly believed.

Topography, stress, and chemical bonding significantly affect transport properties.

Large dataset enables robust statistical conclusions.

Abstract

Transport properties of metal-molecule-metal junctions containing monolayer of conjugated and saturated molecules with characteristic dimensions in the range of 30-300 nm are correlated with microscopic topography, stress and chemical bonding at metal-molecule interfaces. Our statistically significant dataset allows us to conclude that the conductivity of organic molecules ~1.5 nm long is at least 4 orders of magnitude lower than is commonly believed.