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Energy Harvester and Cell Proliferation from Biocompatible PMLG Nanofibers Prepared Using Near-Field Electrospinning and Electrospray Technology

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This paper describes the application of piezoelectric fibers and films formed using near-field electrospinning (NFES) and electrospray (ESP) technology. Poly(γ-methyl L-glutamate) (PMLG), a biocompatible material, was mixed with poly(ethylene oxide) (PEO) and surfactant to obtain a solution of appropriate viscosity and conductance. Because the orientation of the dipoles in PMLG was enhanced upon applying an electric field, we could use the NFES and ESP processes to align dipoles and enhance the piezoelectric properties of the resulting fibrous materials. The maximum peak voltage of a fiber-based harvester prepared using this approach was 0.056 V. Because the fibers and films were non-toxic biological materials displaying excellent piezoelectric characteristics, we deposited them on glass substrates coated with indium tin oxide to observe their effects on the proliferation of cells. The negative charge of PMLG decreased the proliferation of mouse fibroblast cells (NIH3T3); indeed, decreasing the interspacing between the fibers slightly decreased the proliferation of these cells. Moreover, the migration of the cells was inhibited significantly, or even halted, when the coverage of the ESP films increased, implying a growth inhibition effect.
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Keywords: Electrospinning; Electrospray; Nanofiber; Piezoelectric Materials; Polypeptide

Document Type: Research Article

Affiliations: 1: Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan 2: Department of Mechanical Engineering, National Taiwan University, Taipei, 10617, Taiwan 3: Department of Mechanical Engineering, University of California, Berkeley, California 94720, USA 4: Department of Materials and Optoelectronic Science, Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan

Publication date: 01 January 2018

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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