US Government As Represented by the Secretary of the Army

Stevens Institute of Technology

James L Zunino, Iii

Brian Edward Fuchs

Woo Young Lee

Matthew Henderson Ervin

Linh Tung Le

De Kong

Zafar Iqbal

Daniel Stec, Iii

Anne Marie Petrock

Daniel P Schmidt

An electrical component includes an inkjet-printed graphene electrode. Graphene oxide flakes are deposited on a substrate in a graphene oxide ink using an inkjet printer. The deposited graphene oxide is thermally reduced to graphene. The electrical properties of the electrode are comparable to those of electrodes made using activated carbon, carbon nanotubes or graphene made by other methods. The electrical properties of the graphene electrodes may be tailored by adding nanoparticles of other materials to the ink to serve as conductivity enhancers, spacers, or to confer pseudocapacitance. Inkjet-printing can be used to make graphene electrodes of a desired thickness in preselected patterns. Inkjet printing can be used to make highly-transparent graphene electrodes. Inkjet-printed graphene electrodes may be used to fabricate double-layer capacitors that store energy by nanoscale charge separation at the electrode-electrolyte interface (i.e., 'supercapacitors').

Inkjet-printed flexible electronic components from graphene oxide

A reversible, colored thermal indicating composition, whose chromaticity provides a measure of the elapsed time within specific elevated temperature bands&#x2014;the composition containing one or more polydiacetylenes (PDAs) in combination with ZnO alloyed with a transition metal oxide, such as ZrOand/or TiO.

Thermal indicating composition

A method of forming a conductive ink bridge wire EED on either a flat or curved substrate, wherein a finely detailed bridge wire EED is printed on the substrate using a nano-particle conductive material applied with a commercially available piezoelectric drop-on-demand ink jet printer&#x2014;which bridge wire is subsequently coated with a first primary explosive layer, an optional second transition explosive layer, and a third secondary explosive layer&#x2014;such that upon creating a current through the bridge wire EED, the bridge wire is heated and the explosive layers detonate in turn, and in turn initiate the detonation of the device to which the detonator is attached.

Flexible detonator integrated with directly written energetics

Growing community of inventors

Boonton Township, NJ, United States of America

James L Zunino, Iii