Three dimensional (3D) printing technology is rapidly evolving such that printing speed is now a crucial factor in technological developments and future applications. For printing heads based on the inkjet concept, the number of nozzles on the print head is a limiting factor of printing speed. This paper offers a method to practically increase the number of nozzles unlimitedly, and thus to dram...

Recently, there has been an upsurge in efforts dedicated to developing low-cost flexible electronics by exploiting innovative materials and direct printing technologies. This interest is motivated by the need for low-cost mass-production, shapeable, and disposable devices, and the rapid prototyping of electronics and sensors. This review, following a short overview of main printing processes, r...

This paper demonstrates a novel and low-cost additive manufacturing process for flexible and disposable microfluidics on virtually any substrate, with which the first “all-inkjet-printed” microfluidic microwave sensor is prototyped. A 30-μm-high 600-μm-wide SU-8 (polymer) 3-D microfluidic channel and an electromagnetic sensing setting are fabricated with sole reliance on multilayer inkjet-print...

In this paper, a novel “green” inkjet-printed antenna for UHF Radio Frequency Identification (RFID) tags is presented. A slotted Z-shaped monopole configuration is selected and fabricated using inkjet-printing technology on a flexible, low-cost paper substrate utilizing a simple, fast, and environmentally friendly process. The design characteristics of the antenna are verified and the simulated...

Current methods for engineering immobilized, 'solid-phase' growth factor patterns have not addressed the need for presentation of the growth factors in a biologically-relevant context. We developed an inkjet printing methodology for creating solid-phase patterns of unmodified growth factors on native biological material substrates. We demonstrate this approach by printing gradients of fluoresce...

A significant challenge for developers of inkjet printing technologies is achieving uniformity in areas of solid color. Non-uniformities can generally be classed as either twodimensional, including such phenomena as graininess, coalescence and mottle, or one-dimensional, usually termed banding. Banding is often the most objectionable print quality problem in digital prints. Much research has be...