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Functionalized Gold Nanoparticles with a Cohesion Enhancer for Robust Flexible Electrodes

Im, Jisun; Trindade, Gustavo F.; Quach, Tien Thuy; Sohaib, Ali; Wang, Feiran; Austin, Jonathan; Turyanska, Lyudmila; Roberts, Clive J.; Wildman, Ricky; Hague, Richard; Tuck, Christopher

Functionalized Gold Nanoparticles with a Cohesion Enhancer for Robust Flexible Electrodes Thumbnail


Jisun Im

Gustavo F. Trindade

Tien Thuy Quach

Ali Sohaib

Jonathan Austin

Professor of Multiphase Flow and Mechanics

Professor of Additive Manufacturing

Professor of Materials Engineering


The development of conductive inks is required to enable additive manufacturing of electronic components and devices. A gold nanoparticle (AuNP) ink is of particular interest due to its high electrical conductivity, chemical stability, and biocompatibility. However, a printed AuNP film suffers from thermally induced microcracks and pores that lead to the poor integrity of a printed electronic component and electrical failure under external mechanical deformation, hence limiting its application for flexible electronics. Here, we employ a multifunctional thiol as a cohesion enhancer in the AuNP ink to prevent the formation of microcracks and pores by mediating the cohesion of AuNPs via strong interaction between the thiol groups and the gold surface. The inkjet-printed AuNP electrode exhibits an electrical conductivity of 3.0 × 106 S/m and stable electrical properties under repeated cycles (>1000) of mechanical deformation even for a single printed layer and in a salt-rich phosphate-buffered saline solution, offering exciting potential for applications in flexible and 3D electronics as well as in bioelectronics and healthcare devices.

Journal Article Type Article
Acceptance Date Apr 6, 2022
Online Publication Date Apr 25, 2022
Publication Date May 27, 2022
Deposit Date Apr 7, 2022
Publicly Available Date Jun 8, 2022
Journal ACS Applied Nano Materials
Print ISSN 2574-0970
Electronic ISSN 2574-0970
Publisher American Chemical Society (ACS)
Peer Reviewed Peer Reviewed
Volume 5
Issue 5
Pages 6708-6716
Keywords General Materials Science
Public URL
Publisher URL


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