Omnidirectional Printing of Flexible, Stretchable, and Spanning Silver Microelectrodes
Bok Y. Ahn,1,2
Eric B. Duoss,1,2
Michael J. Motala,1,3
Xiaoying Guo,1,2
Sang-Il Park,1,2
Yujie Xiong,1,2
Jongseung Yoon,1,2
Ralph G. Nuzzo,1,3
John A. Rogers,1,2,3
Jennifer A. Lewis1,2*
Flexible, stretchable, and spanning microelectrodes that carry
signals from one circuit element to another are needed for many
emerging forms of electronic and optoelectronic devices. We
have patterned silver microelectrodes by omnidirectional printing
of concentrated nanoparticle inks in both uniform and high–aspect
ratio motifs with minimum widths of approximately 2 micrometers
onto semiconductor, plastic, and glass substrates. The patterned
microelectrodes can withstand repeated bending and stretching
to large levels of strain with minimal degradation of their
electrical properties. With this approach, wire bonding to fragile
three-dimensional devices and spanning interconnects for solar
cell and light-emitting diode arrays are demonstrated.
2 Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
3 Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
* To whom correspondence should be addressed. E-mail: jalewis{at}illinois.edu
