期刊
ACS APPLIED NANO MATERIALS
卷 2, 期 8, 页码 4711-4716出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.9b01182
关键词
organic monolayer; nanoparticle; charge retention; polaron; Kelvin probe force microscopy; density functional theory; nonvolatile memory
资金
- Organic Inorganic Nano composites KC3104 program, Office of Science, the Office of Basic Energy Sciences (BES), Materials Sciences and Engineering (MSE) Division of the U.S. Department of Energy (DOE) [DE-ACO2-05CH11231]
- University of Illinois
- NSF [CHE-1300180]
- Marie Curie FP7 ILSES project [612620]
- Nanotwinning FP7 grant [NN294952]
- Chateaubriand fellowship
- University of Seville
- Office of Science of the U.S. Department of Energy
- University of Texas at Dallas
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.
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