Xerox Corporation

National Research Council of Canada

Palo Alto Research Center Inc.

Yujie Zhu

Sarah Jane Vella

Chad Steven Smithson

Warren Bruce Jackson

Biby Esther Abraham

Kurt I Halfyard

Ethan Shen

Alexandros Vasileiou

Chad S Smithson

Edward Graham Zwartz

Jennifer Lynne Belelie

Robert Anthony Street

Ping Mei

Kent J Evans

Guiqin Song

Gregory McGuire

Yulin Wang

Janos Veres

Chantal Paquet

Robert Claridge

Tianxiao Xu

David Lawton

Carbon supported surface functionalized silver nanoparticles and a method for preparing the same are disclosed. For example, a composition includes carbon supported surface functionalized silver nanoparticles, The methods include preparing a liquid-containing composition comprising a plurality of silver nanoparticles and adding a carbon structure with the liquid-containing composition to form the carbon supported silver nanoparticles in-situ or mixing a composition comprising a carbon structure, a plurality of silver nanoparticles, and a liquid to grow silver nanoparticles on the carbon structure in-situ.

Carbon supported surface functionalized silver nanoparticles

Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles non-covalently interacting with at least a portion of a polymer material via π-π bonding, hydrogen bonding, electrostatic interactions stronger than van der Waals interactions, or any combination thereof. The piezoelectric particles may be dispersed in the polymer material and remain substantially non-agglomerated when combined with the polymer material. The polymer material may comprise at least one thermoplastic polymer, optionally further including a polymer precursor. The compositions may define an extrudable material that is a composite having a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste. Additive manufacturing processes using the compositions may comprise forming a printed part by depositing the compositions layer-by-layer.

Piezoelectric composites featuring noncovalent interactions and use thereof in additive manufacturing

Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a component present therein. Composite filaments suitable for additive manufacturing may comprise a continuous polymer phase of a first thermoplastic polymer and a second thermoplastic polymer that are immiscible with one another, and electrically conductive particles distributed in the continuous polymer phase, such as microparticles, nanoparticles, or any combination thereof. The first thermoplastic polymer is dissolvable or degradable and the second thermoplastic polymer is insoluble or non-degradable under specified conditions. Removal of the first thermoplastic polymer from a printed part may introduce porosity thereto, thereby inducing or enhancing piezoresistivity within the printed part. An aqueous mixture comprising the electrically conductive particles and the first and second thermoplastic polymers may have water removed therefrom, and the resulting composite residue may be extruded to form the composite filaments.

Piezoresistive composites via additive manufacturing and composite filaments associated therewith

Systems and methods for detecting item placement on a surface are provided. The system includes a pressure-sensitive conductive sheet and a resistive grid connected to the pressure-sensitive conductive sheet. The resistive grid includes an electrically non-conductive polymer. The resistive grid includes one or more lines arranged in a pattern. The lines may include parallel lines, parallel and perpendicular lines, concentric circles, arcs of expanding radius, and/or any other suitable types of lines and/or any combination thereof. The resistive grid may include one or more distinct lines and/or shapes positioned at various points along the pressure-sensitive sheet layer.

Systems and methods for improved sensing performance of pressure-sensitive conductive sheets

A method is disclosed. For example, the method includes applying a clear coat layer on a substrate, drying the clear coat layer to form random microstructures in the clear coat layer, dispensing a printing fluid to print a graphical pattern on the clear coat layer, and generating a physical unclonable function (PUF) pattern by drying the printing fluid that fills the random microstructures formed in the clear coat layer.

Printed physical unclonable function patterns

A printable flexible overcoat ink composition that can be digitally printed is disclosed. For example, the printable flexible overcoat ink composition includes a mixture of a thermoplastic polyurethane (TPU) and a solvent. The mixture is mixed to have a viscosity of 1 centipoise to 2,000 centipoise to allow the mixture to be digitally printed via an inkjet printhead or an aerosol jet printhead.

Printable flexible overcoat ink compositions

A print feedstock has a base material and a marker material, the base material and the marker material having different physical properties. A system to validate objects includes at least one printer to print feedstock onto an object, the feedstock comprising a base material and a marker material, the base material and a marker material having different properties, a device to create a unique identifier for the object based upon a pattern of the feedstock, and a store in which the unique identifier can be stored.

Printable unclonable function patterns

An ink composition comprises a thermoplastic polyurethane; particles comprising silver; and at least one diluent liquid. The thermoplastic polyurethane has the property of exhibiting an elongation at break ranging from about 200% to about 1500% at 23&#xb0; C. when in pure polymer form.

Conductive ink composition and article of manufacture made therefrom

A method for producing flexible conductive printed circuit with a printed overcoat is disclosed. For example, the method includes forming conductive printed circuit lines on a flexible substrate, detecting locations on the flexible substrate where the conductive printed circuit lines are formed, and printing an overcoat over the conductive printed circuit lines at the locations that are detected on the flexible substrate, wherein the overcoat comprises a mixture of thermoplastic polyurethane (TPU) and a solvent having a viscosity of 1 centipoise to 2,000 centipoise to allow the mixture to be printed.

Flexible conductive printed circuits with printed overcoats

A temperature sensitive ink composition including a metal oxide nanoparticle; a binder; a solvent; an optional dispersant; and an optional surfactant; wherein the ink composition is a thermistor ink that exhibits a change in resistance which is dependent on temperature. A process for preparing the ink composition. A process including depositing the ink composition onto a substrate to form deposited features; and optionally, heating the deposited features on the substrate to form temperature sensitive features on the substrate, wherein depositing can include ink jet printing or aerosol jet printing.

Temperature sensor ink composition with metal oxide nanoparticles

There is described a point-of-purchase display and method. The display includes one or more sheets. The one or more sheets when unfolded and assembled form the display. The display includes a back wall, a front wall, at least a side wall and a bottom wall. A printed electronic device is affixed to a surface of the one or more sheets. The printed electronic device is selected from the group consisting of: wires, insulators, resistors, capacitors, inductors, transformers, transistors, antennas, OLEDs and sensors. A microcontroller electrically is coupled to the printed electronic device. A connection device is coupled to the printed electronic device. A modular electronic component is coupled to the connection device.

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Mississauga, Canada

Yujie Zhu