A nanogenerator has been developed using lead-free nanomaterials. By introducing a mechanical deformation of ~ 0.1%, the nanogenerator generated a current and voltage of 0.13 μ A and 5.3 V, respectively. The working principle relies on the geometry of the unipolar assembly ( Pzy ) in the triangular-belt structure, which produces a piezotronic potential across the nanogenerator, thereby driving a flow of induced charges between the top and bottom electrodes. This is a novel discovery as it is the first demonstration of high output power from a lead-free material nanogenerator that employed a simple, cost-effective, and scalable technology which can be developed for further industrial applications.

 

 

 

 

We are the first to use a simple direct ultraviolet (UV, λ=365 nm, I=76 mWcm-2) light in the decomposition process to fabricate ZnO nanowires on flexible substrate using a zinc acetylacetonate hydrate precursor in ambient air. The ZnO nanowires excellent photocatalystic activities under illumination of Visible light.

 

 

 

 

We demonstrated a flexible strain sensor based on nanowires/microwires. On the basis of our experimental observation and theoretical calculation, the characteristic I-V curves revealed that our strain sensors had ultra-high sensitivity, which is attributed to the piezopotential-modulated change in Schottky barrier height (SBH), i.e., piezotronic effect. The on/off ratio of our device is ~587 and a gauge factor of ~3,740 has been demonstrated.