Brewer Science, Rolla, Mo., introduces CNTRENE 4010, the first aqueous, surfactant-free, ready-to-use semiconducting carbon nanotube inks for microelectronics and printed electronics applications. They are stable, water-based materials prepared by a proprietary method developed by Brewer Science. Due to their unique formulation, the inks do not contain additives such as surfactants that require damaging and waste-producing post-deposition treatment (wash) steps.
These inks can be deposited easily onto a variety of rigid and flexible substrates with standard coating techniques including spray-coating and Aerosol Jet® printing. At Brewer Science’s Carbon Electronics Center, arrays of TFT devices have been prepared which have average on/off ratios of >4000 and mobilities of >0.2 cm2/V·s.
“Until now, users of semiconducting CNTs had to use surfactant-containing ink from material suppliers or produce surfactant-based inks themselves from raw semiconductor CNT sources. In either case, the deposited surfactant had to be washed from the film, which generated CNT-contaminated waste and could redistribute the deposited films, leading to performance variation,” said Jim Lamb, Director of Business Development, Carbon Electronics Center.
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