Laser Fabrication of Polymer Ferroelectric Nanostructures for Nonvolatile Organic Memory Devices.
Polymer ferroelectric laser-induced periodic surface structures (LIPSS) have been prepared on ferroelectric thin films of a poly(vinylidene fluoride-trifluoroethylene) copolymer. Although this copolymer does not absorb light at the laser wavelength, LIPSS on the copolymer can be obtained by forming a bilayer with other light-absorbing polymers. The ferroelectric nature of the structured bilayer was proven by piezoresponse force microscopy measurements. Ferroelectric hysteresis was found on both the bilayer and the laser-structured bilayer. We show that it is possible to write ferroelectric information at the nanoscale. The laser-structured ferroelectric bilayer showed an increase in the information storage density of an order of magnitude, in comparison to the original bilayer.
Instituto de Estructura de la Materia (IEM-CSIC), C/Serrano 121, Madrid 28006, Spain.
Daniel E
DE
Martínez-Tong
Instituto de Estructura de la Materia (IEM-CSIC), C/Serrano 121, Madrid 28006, Spain.
Álvaro
Á
Rodríguez-Rodríguez
Instituto de Estructura de la Materia (IEM-CSIC), C/Serrano 121, Madrid 28006, Spain.
Aurora
A
Nogales
Instituto de Estructura de la Materia (IEM-CSIC), C/Serrano 121, Madrid 28006, Spain.
Mari-Cruz
MC
García-Gutiérrez
Instituto de Microelectrónica de Barcelona IMB-CNM (CSIC), Campus UAB 08193, Cerdanyola del Vallès (Bellaterra) Barcelona, Spain.
Francesc
F
Pérez-Murano
Instituto de Microelectrónica de Barcelona IMB-CNM (CSIC), Campus UAB 08193, Cerdanyola del Vallès (Bellaterra) Barcelona, Spain.
Jordi
J
Llobet
Instituto de Estructura de la Materia (IEM-CSIC), C/Serrano 121, Madrid 28006, Spain.
Tiberio A
TA
Ezquerra
Instituto de Química Física Rocasolano (IQFR-CSIC), C/Serrano 119, Madrid 28006, Spain.
Esther
E
Rebollar
laser-induced periodic surface structures; nanogratings; nonvolatile ferroelectric memories; piezoresponse force microscopy; polymer bilayers