Xerox Corporation

University of Toronto

Alphonsus Hon-Chung Ng

Yiliang Wu

Beng S Ong

Aaron Ray Wheeler

Ryan Fobel

Man Ho Stephen Ho

Disclosed herein is a surfactant additive, ethylenediamine tetrakis(ethoxylate-block-propoxylate) tetrol with 16 ethylene oxide repeat units and 18 propylene oxide repeat units (known by its trade name as Tetronic 90R4) used as a droplet-additive, or to coat DMF driving electrode surfaces which dramatically improves the capability to work with high-protein-content liquids (e.g., whole blood) on digital microfluidic chips. This surfactant prevents protein adsorption and fouling of DMF electrode surfaces to an extent that was heretofore impossible. Specifically, this surfactant allows for the manipulation of droplets of undiluted whole blood for &#x3e;1 hour per electrode (&#x3e;1 50 times better than what is possible for any known additive). This improvement in handling high protein content media will revolutionize blood-based diagnostics on digital microfluidic platforms.

Surfactant additives for digital microfluidic devices for high protein content droplets transport

An ambipolar transistor, including a p-type semiconductor region and an n-type semiconductor region near the p-type semiconductor region. Also a first terminal and second terminal contact both the p-type semiconductor region and the n-type semiconductor region. Furthermore, the p-type semiconductor region and the n-type semiconductor region substantially do not overlap each other. A method of manufacturing an ambipolar transistor is also disclosed, including forming a p-type semiconductor region, forming an n-type semiconductor region near the p-type semiconductor region, forming a first terminal contacting both the p-type semiconductor region and n-type semiconductor region, forming a second terminal contacting both the p-type semiconductor region and n-type semiconductor region; and wherein the p-type semiconductor region and the n-type semiconductor region substantially do not overlap, and have substantially no interfacial area.

Ambipolar transistor design

Growing community of inventors

North York, Canada

Alphonsus Hon-Chung Ng