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나노 구조 물리 연구단
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Hierarchically-structured silver nanoflowers for highly conductive metallic inks with dramatically reduced filler concentration

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Title
Hierarchically-structured silver nanoflowers for highly conductive metallic inks with dramatically reduced filler concentration
Author(s)
Muhammed Ajmal C.; Faseela K. P.; Swati Singh; Seunghyun Baik
Publication Date
2016-10
Journal
SCIENTIFIC REPORTS, v.6, no., pp.34894 -
Publisher
NATURE PUBLISHING GROUP
Abstract
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:250~580 nm, single crystalline petal thickness: 9~22 nm) with high reproducibility and a high yield of >99.5%. The unique hierarchical structure resulted in coalescence of petals over 80~120 °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 × 105 Scm−1), at a low curing temperature of 120 °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. © The Author(s) 2016
URI
http://pr.ibs.re.kr/handle/8788114/2848
DOI
10.1038/srep34894
ISSN
2045-2322
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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