Nanowire Placement with Ink Jet Heads

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We have shown that thermal ink jet print heads can be used to place GaN nanowires on patterned substrates. The semiconductor nanowires had diameters ranging from 70 to 300 nm and lengths from 5 μm to 20 μm. They were dispersed in alcohol-water solutions for loading into ink reservoirs. To avoid clogging, the thermal ink jet heads were chosen with drop weights from 72 to 165 ng. The thermal ink jet method was successfully used to place nanowires across narrow gaps in metal patterns. When using a low-power optical microscope to align the nozzle with substrate pattern features, the placement accuracy is much higher than with micropipette placement. For unknown reasons, nanowires would not pass through piezoelectric ink jet heads. These experiments demonstrate that ink jet technology holds promise for low-cost, rapid, massively parallel placement and processing of nanowires for optoelectronic, electronic, and sensor applications.

Document Type: Research Article

Publication date: January 1, 2007

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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