摘要： Near-field electrospinning (NFES) is a newly-established technique by electrically charged a polymer solution to produce the site addressable one-dimensional (1D) fibers or two-dimensional (2D) aligned fibrous meshes. Nevertheless, the direct electrospinning of fibers into controllable is still a nascent technology. In this paper, a new integration of paper-based self-powered sensors (PSS) and three-dimensional (3D) architectures of NFES electrospun polyvinylidene fluoride (PVDF) micro/nano fibers (MNFs) is demonstrated in a direct-write and in-situ poled manner. Owing to the principle of piezoelectricity, the uni-poled dipole moment will be accumulated across the electrospun fibers and the output voltage and current could reach to 4V and 100nA respectively. Such charge transfer grounds the locally deposited fibers and renders them the preferential sites for the deposition of subsequent fibers. We apply NFES to directly write arbitrarily shaped 3D structures through consistent and spatially controlled fiber-by-fiber stacking of PVDF fibers. An element central to the success of this 3D electrospinning is the use of a printing paper placed on the grounded conductive plate and acting as a fiber collector. Once deposited on the paper, residual solvents from near-field electrospun fibers can infiltrate the paper substrate, enhancing the charge transfer between the deposited fibers and the ground plate via the fibrous network within the paper. Such charge transfer grounds the deposited fibers and turns them into locally fabricated electrical poles, which attract subsequent in-flight fibers to deposit in a self-aligned manner on top of each other. Finger striking and pushing motions are validated the open-circuit voltage and short-circuit current can be harvested during one finger–striking motion is measured as ~1.2V/60nA. The proposed technique has the potential to advance the existing electrospinning technologies in constructing 3D structures for biomedical and wearable electronics. [Display omitted] •Paper-based self-powered sensors with three-dimensional PVDF fibers are demonstrated.•Output voltage and current of 4 V and 100 nA can be generated by spatially stacked PVDF fibers.•Advancement of 3D structures are promising for biomedical and wearable electronics. 出版者： Elsevier Ltd 出版日期： 2016-12 出處： Nano energy, 2016-12, Vol.30, p.677-683 版權： 2016 Elsevier Ltd 識別號： ISSN: 2211-2855 識別號： DOI: 10.1016/j.nanoen.2016.10.061
