378721 In Situ Formation of Silver Nanowire Networks on Paper and Plastic Substrates Using a Desktop Inkjet Printer

Wednesday, November 19, 2014: 4:53 PM
International 6 (Marriott Marquis Atlanta)
Pushkaraj Joshi, Shravan Kumar Parmar and Venugopal Santhanam, Department of Chemical Engineering, Indian Institute of Science, Bangalore, India

Simple, universally adaptable techniques for fabricating nanostructured films are required to translate lab scale innovations into low-cost solutions for the developing world. Silver nanowires have emerged as an attractive building block for fabricating a wide range of sensors and devices. Herein, we report the in situ formation of conductive silver-nanowire networks on paper, thereby, eliminating the need for either cost-intensive ink formulation or substrate preparation or complex post-deposition sintering steps. Reminiscent of the photographic process of ‘salt printing’, a desktop office printer was used to deposit desired patterns of silver bromide on paper/plastic substrates, which were subsequently overexposed to light from a halogen lamp and then immersed in a photographic developer. Percolating networks of silver nanowires (30-100 nm dia. and 1-2 µm length) that conformally coated the substrate were formed. Thus, films of silver nanowires can be fabricated over large areas at a low-cost by combining two widely used processes—inkjet printing and photographic development. These films show excellent performance characteristics as strain gauges and as SERS (Surface Enhanced Raman Spectroscopy) substrates.

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See more of this Session: Nanowires: Processing and Applications
See more of this Group/Topical: Nanoscale Science and Engineering Forum