Abstract
Silk fibroin-based biodegradable composite-type nanogenerators are demonstrated with controllable lifetime for powering to the implantable devices. The 2D thin film- and 1D wire-type composites consist of the well-dispersed lead-free ferroelectric (BaTiO3, ZnSnO3, Bi0.5(Na0.82K0.18)0.5TiO3, and K0.5Na0.5Nb0.995Mn0.005O3) nanoparticles. Ag nanowires are used to enhance the dispersion of the nanoparticles and polyvinylpyrrolidone prevents Ag nanowires from connecting with each other. A maximum output voltages and current densities of 2.2V and 0.12μA/cm2 in the thin film, and 1.8V and 0.1μA/cm2 in the wire are obtained under the motion of a foot step for when 30wt% KNN:Mn nanoparticles are well-dispersed in the solution because of the largest piezoelectric coupling figure of merit. The properties of water-soluble composite films are also controlled with the glycerol content up to two days.
Original language | English |
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Pages (from-to) | 87-94 |
Number of pages | 8 |
Journal | Nano Energy |
Volume | 14 |
DOIs | |
Publication status | Published - 2015 May |
Bibliographical note
Funding Information:This work was supported by Samsung Research Funding Center of Samsung Electronics under Project Number SRFC-TA1403-06 . We are very thankful to Prof. Ju-Young Kim and Prof. Wook Jo (UNIST) for great contribution in this article.
Publisher Copyright:
© 2015 Elsevier Ltd.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Electrical and Electronic Engineering