Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 24, Issue 40, Pages 6262-6269Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201401599
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Funding
- NRF grant - Ministry of Science, ICT AMP
- Future Planning (MSIP) [2010-0029106, 2009-0083540]
- Human Resources Development Program of KETEP grant - Korea government Ministry of Trade, Industry and Energy [20134010200600]
- Samsung Research Funding Center of Samsung Electronics [SRFC-MA1301-07]
- National Research Foundation of Korea [2010-0029106, 21A20131812182] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Perovskite nanoparticle-based nanocomposite thin films strictly tailored using unconventional layer-by-layer (LbL) assembly in organic media for piezoelectric nanogenerators (NGs) are demonstrated. By employing sub-20-nm BaTiO3 nanoparticles stabilized by oleic acid ligands (i.e., OA-BTONPs) and carboxylic acid (COOH)-functionalized polymers, such as poly(acrylic acid) (PAA), the resulting OA-BTONP/PAA nanocomposite multilayers are prepared by exploiting the high affinity between the COOH groups of PAA and the BTONPs. The ferroelectric and piezoelectric performance of the (PAA/OA-BTONP)(n) thin films can be precisely controlled by altering the bilayer number, inserted polymer type, and OA-BTONP size. It is found that the LbL assembly in nonpolar solvent media can effectively increase the quantity of adsorbed OA-BTONPs, resulting in the dramatic enhancement of electric power output from the piezoelectric NGs. Furthermore, very low leakage currents are detected from the (PAA/OA-BTONP)(n) thin films for obtaining highly reliable power-generating performance of piezoelectric NGs.
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