title: Self-powered pH sensor based on a flexible organic-inorganic hybrid composite nanogenerator.
abstract: In this study, we developed an innovative, flexible, organic-inorganic hybrid composite nanogenerator, which was used to drive a self-powered microwire-based pH sensor. The hybrid composite nanogenerator was fabricated using ZnO nanowire and piezoelectric polymer poly(vinylidene fluoride), through a simple, inexpensive solution-casting technique. The fabricated hybrid composite nanogenerator delivered a maximum open-circuit voltage of 6.9 V and a short-circuit current of 0.96 μA, with an output power of 6.624 μW under uniaxial compression. This high-performance, electric poling free composite nanogenerator opens up the possibility of industrial-scale fabrication. The hybrid nanogenerator demonstrated its ability to drive five green LEDs simultaneously, without using an energy-storage device. Additionally, we constructed a self-powered pH sensor, using a ZnO microwire powered with our hybrid nanogenerator. The output voltage varied according to changes in the pH level. This study demonstrates the feasibility of using a hybrid nanogenerator as a self-powered device that can be extended for use as a biosensor for environmental monitoring and/or as a smart, wearable, vibration sensor in future applications.
authors: Nanomaterials and System Lab, Department of Mechatronics Engineering, Jeju National University , Jeju 690-756, Republic of Korea.
authors: Balasubramaniam
authors: B
authors: Saravanakumar
authors: Shin
authors: S
authors: Soyoon
authors: Sang-Jae
authors: SJ
authors: Kim
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D004560:Electricity; D006863:Hydrogen-Ion Concentration; D007287:Inorganic Chemicals / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D009930:Organic Chemicals / Q000737:chemistry*; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: D007287:Inorganic Chemicals; D009930:Organic Chemicals; D015034:Zinc Oxide