Journal
SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep34894
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Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [NRF-2014R1A2A1A10050639, IBS-R011-D1]
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Silver has long been employed as an electrically conductive component, and morphology-dependent properties have been actively investigated. Here we present a novel scalable synthesis method of flower-shaped silver nanoparticles (silver nanoflowers, Ag NFs). The preferential affinity of citrate molecules on (111) surface of silver enabled spontaneous anisotropic growth of Ag NFs (bud size: 250 similar to 580 nm, single crystalline petal thickness: 9 similar to 22 nm) with high reproducibility and a high yield of > 99.5%. The unique hierarchical structure resulted in coalescence of petals over 80 similar to 120 degrees C which was practically employed in conductive inks to construct percolation pathways among Ag NFs. The ink with only 3 wt% of Ag NFs provided two orders of magnitude greater conductivity (1.008 x 10(5) Scm(-1)), at a low curing temperature of 120 degrees C, compared with the silver nanoparticle ink with a much higher silver concentration (50 wt%). This extraordinary property may provide an excellent opportunity for Ag NFs for practical applications in printable and flexible electronics.
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