Harvard College

Daniele Foresti

Jennifer Ann Lewis

Dimos Poulikakos

Manish Kumar Tiwari

Armand Kurum

Aleksandra Markovic

A method of acoustophoretic printing comprises generating an acoustic field at a first end of an acoustic chamber fully or partially enclosed by sound-reflecting walls. The acoustic field interacts with the sound-reflecting walls and travels through the acoustic chamber. The acoustic field is enhanced in a chamber outlet at a second end of the acoustic chamber. An ink is delivered into a nozzle positioned within the acoustic chamber. The nozzle has a nozzle opening projecting into the chamber outlet. The ink travels through the nozzle and is exposed to the enhanced acoustic field at the nozzle opening, and a predetermined volume of the ink is ejected from the nozzle opening and out of the acoustic chamber.

Apparatus and method for acoustophoretic printing

A subwavelength resonator for acoustophoretic printing comprises a hollow resonator body for local enhancement of an acoustic field integrated with a nozzle body for delivery of an ink into the acoustic field. The nozzle body has a first end outside the hollow resonator body and a second end inside the hollow resonator body, and includes a fluid channel extending between a fluid inlet at the first end and a fluid outlet at the second end. The fluid channel passes through a side wall of the hollow resonator body and includes at least one bend. During acoustophoretic printing, an ink delivered through the fluid channel of the nozzle body and out of the fluid outlet is exposed to a high-intensity acoustic field.

Subwavelength resonator for acoustophoretic printing

The present invention contains a printing apparatus and a method, e.g., for ejecting inks (i.e., pure liquids, mixtures, colloids, etc.) for a very broad range of physical properties (such as viscosity). Acoustic forcesmay be generated by an emitterand a reflectorto detach dropletsfrom a nozzle. The ink may be advanced through the nozzleby a standard back pressure system. A reflectorless chambermay enhance acoustic forcesand the dropletsmay be ejected at a bottomof said chamber, so that dropletsmay be deposited on any substrate

Acoustophoretic printing apparatus and method

The present invention contains a printing apparatus and a method, e.g., for ejecting inks (i.e. pure liquids, mixtures, colloids, etc.) for a very broad range of physical properties (such as viscosity). Acoustic forcesmay be generated by an emitterand a reflectorto detach dropletsfrom a nozzle. The ink may be advanced through the nozzleby a standard back pressure system. A reflectorless chambermay enhance acoustic forcesand the dropletsmay be ejected at a bottomof said chamber, so that dropletsmay be deposited on any substrate

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Somerville, MA, United States of America

Daniele Foresti