Effect of Morphology on the Electrical Resistivity of Silver Nanostructure Films.
Published
Journal Article
The relatively high temperatures (>200 °C) required to sinter silver nanoparticle inks have limited the development of printed electronic devices on low-cost, heat-sensitive paper and plastic substrates. This article explores the change in morphology and resistivity that occurs upon heating thick films of silver nanowires (of two different lengths; Ag NWs), nanoparticles (Ag NPs), and microflakes (Ag MFs) at temperatures between 70 and 400 °C. After heating at 70 °C, films of long Ag NWs exhibited a resistivity of 1.8 × 10-5 Ω cm, 4000 times more conductive than films made from Ag NPs. This result indicates the resistivity of thick films of silver nanostructures is dominated by the contact resistance between particles before sintering. After sintering at 300 °C, the resistivity of short Ag NWs, long Ag NWs, and Ag NPs converge to a value of (2-3) × 10-5 Ω cm, while films of Ag MFs remain ∼10× less conductive (4.06 × 10-4 Ω cm). Thus, films of long Ag NW films heated at 70 °C are more conductive than Ag NP films sintered at 300 °C. Adding 10 wt % nanowires to a film of nanoparticles results in a 400-fold improvement in resistivity.
Full Text
Duke Authors
Cited Authors
- Stewart, IE; Kim, MJ; Wiley, BJ
Published Date
- January 3, 2017
Published In
Volume / Issue
- 9 / 2
Start / End Page
- 1870 - 1876
PubMed ID
- 27981831
Pubmed Central ID
- 27981831
Electronic International Standard Serial Number (EISSN)
- 1944-8252
International Standard Serial Number (ISSN)
- 1944-8244
Digital Object Identifier (DOI)
- 10.1021/acsami.6b12289
Language
- eng