Nanoimaging of Organic Charge Retention Effects: Implications for Nonvolatile Memory, Neuromorphic Computing, and High Dielectric Breakdown Devices

Yingjie Zhang, Jun Kang, Olivier Pluchery, Louis Caillard, Yves J. Chabal, Lin Wang Wang, Javier Fernandez Sanz, Miquel Salmeron

Research output: Contribution to journalArticlepeer-review

Abstract

While a large variety of organic and molecular materials have been found to exhibit charge memory effects, the underlying mechanism is not well-understood, which hinders rational device design. Here, we study the charge retention mechanism of a nanoscale memory system, an organic monolayer on a silicon substrate, with Au nanoparticles on top serving as the electrical contact. Combining scanning probe imaging/manipulation and density functional simulations, we observe stable charge retention effects in the system and attributed it to polaron effects at the amine functional groups. Our findings can pave the way for applications in nonvolatile memory, neuromorphic computing, and high dielectric breakdown devices.

Original languageEnglish (US)
Pages (from-to)4711-4716
Number of pages6
JournalACS Applied Nano Materials
Volume2
Issue number8
DOIs
StatePublished - Aug 23 2019

Keywords

  • Kelvin probe force microscopy
  • charge retention
  • density functional theory
  • nanoparticle
  • nonvolatile memory
  • organic monolayer
  • polaron

ASJC Scopus subject areas

  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Nanoimaging of Organic Charge Retention Effects: Implications for Nonvolatile Memory, Neuromorphic Computing, and High Dielectric Breakdown Devices'. Together they form a unique fingerprint.

Cite this