Nanoscale, Electrified Liquid Jets for High-Resolution Printing of Charge
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- Nanoscale, Electrified Liquid Jets for High-Resolution Printing of Charge
- Park, Jang-Ung; Park, Jang-Ung; Lee, Sangkyu; Unarunotai, Sakulsuk; Sun, Yugang; Dunham, Simon; Song, Taeseup; Ferreira, Placid M.; Alleyene, Andrew G.; Paik, Ungyu; Rogers, John A.
- Charge printing; Electrohydrodynamics; Electrostatic doping; Jet printing; Semiconductor nanomaterials
- Issue Date
- AMER CHEMICAL SOC
- NANO LETTERS, v.10, no.2, pp.584 - 591
- Nearly all research in micro- and nanofabrication focuses on the formation of solid structures of materials that perform some mechanical, electrical, optical, or related function. Fabricating patterns of charges, by contrast, is a much less well explored area that is of separate and growing Interesting because the associated electric fields can be exploited to control the behavior of nanoscale electronic and mechanical devices, guide the assembly of nanomaterials. or modulate the properties of biological systems. This paper describes a versatile technique that uses fine, electrified liquid jets formed by electrohydrodynamics at micro- and nanoscale nozzles to print complex patterns of both positive and negative charges, with resolution that can extend into the submicrometer and nanometer regime. The reported results establish the basic aspects of this process and demonstrate the capabilities through printed patterns with diverse geometries and charge configurations in a variety of liquid inks, including suspensions of nanoparticles and nanowires. The use of printed charge to control the properties of silicon nanomembrane transistors provides an application example.
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