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Nano energy v.31, 2017년, pp.239 - 246   SCIE
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Scalable single crystalline PMN-PT nanobelts sculpted from bulk for energy harvesting

Chen, Yan (Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstraße 20, 01069, Germany ); Zhang, Yang (Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstraße 20, 01069, Germany ); Zhang, Long (Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang, China ); Ding, Fei (Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstraße 20, 01069, Germany ); Schmidt, Oliver G. (Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstraße 20, 01069, Germany );
  • 초록  

    Abstract Microelectromechanical systems (MEMS) incorporating piezoelectric elements enable highly sensitive sensors/actuators and effective energy harvesting. The development of a facile method for fabricating high-quality, deterministically positioned piezoelectric nanostructures provides new opportunities to build MEMS devices with dramatically higher performance. Piezoelectric materials with superior piezoelectric response, such as the relaxor ferroelectric Pb(Mg,Nb)O 3 -PbTiO 3 (PMN-PT) represents a particularly interesting active material that functions as sensors/actuators and energy harvesters. Bottom-up synthesis of PMN-PT nanostructure suffers from polycrystallinity and stoichiometric deficiency. Yet, another main challenge is the deterministic positioning, aligning and integrating of as-synthesized nanostructures into functional arrays, in a similar manner to top-down strategies. Here, we fabricated scalable ordered single crystalline PMN-PT nanobelt (NB) arrays via a versatile top-down method. These NBs arrays, selectively sculpted from a single crystal bulk preserve well ferroelectric properties and exhibit the highest reported piezoelectric coefficient (~677pm/V). A flexible PMN-PT NB harvester was demonstrated based on these single crystalline NBs. The maximum output voltage and current reach ~6.0V and ~102μA, respectively under a 0.2% strain agitation. The result paves the way towards real application for top-down fabricated PMN-PT NBs as nanogenerators. Highlights Single-crystal PMN-PT nanobelt arrays have been obtained through a versatile top-down method. The PMN-PT nanobelts feature the highest reported piezoelectric coefficient (~677pm/V). The maximum output voltage and current of the PMN-PT-based nanogenerator are ~6.0V and ~102μA, respectively. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Top-down fabrication .   PMN-PT nanobelt array .   Piezoelectric .   Energy harvesting .   Nanogenerators.  

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