Nonvolatile write-once-read-many-times memory device with functionalized-nanoshells/PEDOT:PSS nanocomposites

We have investigated the memory effect of the nanocomposites of functionalized carbon nanoshells (f-CNSs) mixed with poly(3,4- ethylenedioxythiophene) doped with polystyrenesulfonate (PEDOT:PSS) polymer. The f-CNSs were synthesized by the spray pyrolysis method and functionalized in situ with functional groups (OH, COOH, C-H, C-OH) with the aim of improving their compatibility in the aqueous dispersion of PEDOT:PSS. The current-voltage (I-V) sweep curves at room temperature for the Al/f-CNSs, for certain concentrations range, embedded in a PEDOT:PSS layer/Al devices showed electrical bistability for write-once-read-many-times (WORM) memory devices. The memory effect observed in the devices can be explained due to the existence of trapped charges in the f-CNSs/PEDOT:PSS layer. The carrier transport mechanisms for the memory devices is studied and discussed. © 2011 Elsevier B.V. All rights reserved.

Carbon nanostructures; PEDOT:PSS; WORM memoy Aqueous dispersions; Carbon Nanostructures; Current voltage; Electrical Bistability; Ethylenedioxythiophenes; Functionalized; In-situ; Memory device; Memory effects; Nanoshells; Non-volatile; PEDOT:PSS; Polystyrene sulfonate; Room temperature; Spray pyrolysis method; Transport mechanism; Trapped charge; WORM memoy; Write-once-read-many; Functional groups; Functional polymers; Nanocomposites; Nanostructures; Polystyrenes; Spray pyrolysis; Conducting polymers

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