Princeton University

Other

Tag Optics Inc.

Craig B Arnold

Euan McLeod

Alexandre Mermillod-Blondin

John Cannarella

Jeffrey J Schwartz

Stephen B Bandini

Joshua Spechler

Xinyi M Liu

Carl Nist-Lund

Jake Herb

Miles Joseph Cole

Christian Theriault

Polymeric substrates, optionally in sheet form, treated with a thin layer of photoresist are perforated by laser ablation. Following removal of the photoresist the polymer substrates perforated with holes are patterned in stripes by photolithography, which is followed by synthesis of a cell-adhesive organometallic/self-assembled monolayer of phosphonate (SAMP) interface in the exposed regions, providing well-aligned continuous stripes for various levels of perforation. Cells plated on each of these 2-dimensional (2D) perforated surfaces attach to the interface and spread in alignment with pattern fidelity that is as high as that measured on a non-perforated, patterned substrate. A stack of such 2D patterned polymers yields a 3-dimensional (3D) device which facilitates cell growth and viability via the perforations.

Three-dimensional (3D) tissue scaffold with cell alignment

Disclosed is a portable medical device that can automatically sense the location of a vein and inject a needle to precisely pierce the vein without damaging surrounding tissue. The disclosed device does not require additional assistance for a person to use it on oneself. The disclosed device may optionally employ a basic arm cuff style, and can be used, inter alia, in hospital, military, home infusion, infusion treatment center, emergency response, school, or disaster relief settings.

Automatic intravenous injection device

Disclosed is a class of organic salts and electrolytes, generally for use with electrochemical devices. Some of these salts enable the transport of magnesium ions without the presence of any additives, such as halide ions. Precursors are generated using simple fluorinated alcohols as well as abundant reagents. These precursors, often dissolved in ethereal solvents, may be combined with an appropriate Lewis acid to result in solutions that are able to conduct ions and allow for reversible electrodeposition.

Electrolytes for magnesium-ion batteries

An anomalous battery operating detection device, which includes a sensing unit capable of measuring mechanical properties of a battery, coupled to a processor for determining whether anomalous behavior has been detected. These devices measure a mechanical property, identifying a difference in the property, and based on that difference, making a determination of anomalous behavior. Non-mechanical properties may also be utilized when making the determination. Responsive actions can be taken once the anomalous behavior is detected. The battery can be intercalated, and may be a lithium-ion battery cell. Alternatively, the sensing unit may measure strain. In addition, more than one sensing unit may be utilized, or a separate light source may be introduced. The system may be configured to allow the processor to determine the potential for failure before the battery fails.

Device and method for mechanically detecting anomalous battery operation

Mechanical energy harvesting is an increasingly important method of providing power to distributed sensor networks where physical connection to a power source is impractical. Conventional methods use vibrations to actuate a piezoelectric element, coil/magnet assembly, or capacitor plates, thereby generating an electric current. The low charge-density of these devices excludes their application in low frequency and static load sources, with the lowest frequency reported devices limited to 10 Hz. These frequency limitations can be overcome by exploiting the piezoelectrochemical effect, a similar but physically distinct effect from the piezoelectric effect whereby an applied mechanical load alters the thermodynamics of an electrochemical reaction to produce a voltage/current. Piezoelectrochemical energy harvesters are expected to produce orders of magnitude more energy per load cycle than piezoelectrics and comparable power capabilities. These characteristics make piezoelectrochemical energy harvesters ideal for application in low-frequency and static loading scenarios for which conventional mechanical energy harvesting technology is poorly suited. Examples of such load sources include, but are not limited to, human footsteps, vehicular loads, and pressure vessels.

Device for harvesting mechanical energy through a piezoelectrochemical effect

A tunable acoustic gradient index of refraction (TAG) lens and system are provided that permit, in one aspect, dynamic selection of the lens output, including dynamic focusing and imaging. The system may include a TAG lens and at least one of a source and a detector of electromagnetic radiation. A controller may be provided in electrical communication with the lens and at least one of the source and detector and may be configured to provide a driving signal to control the index of refraction and to provide a synchronizing signal to time at least one of the source and the detector relative to the driving signal. Thus, the controller is able to specify that the source irradiates the lens (or detector detects the lens output) when a desired refractive index distribution is present within the lens, e.g. when a desired lens output is present.

Tunable acoustic gradient index of refraction lens and system

An apparatus, system and method for microscopy. The apparatus, system and method includes a stage configured to receive an item; a tunable acoustic gradient index of refraction (TAG) lens having a first aspect positioned to image the received item, wherein the first aspect of the TAG lens is configured to have an optical power profile in accordance with an operational frequency of the TAG lens; one or more lenses configured to magnify an image of the received item at a viewing point; and at least one pulsed light source configured to illuminate the received item and to pulse at one or more points within the optical power profile of the TAG lens.

Microscope with tunable acoustic gradient index of refraction lens enabling multiple focal plan imaging

A battery management system for use with a battery under test is disclosed. The system includes a container configured to hold the battery. The system also includes a stress/strain sensor. The container is configured to hold the battery in fixed relationship with respect to the stress/strain sensor. A processor is coupled to the stress/strain sensor, the processor being configured to measure the stress/strain on the battery and determine the state of health (SOH) of the battery based on the measured stress/strain and previously stored SOH relationship data for the battery. The processor may be configured to determine a state of charge (SOC) of the battery based on the measured stress/strain, the SOH of the battery and previously stored SOC relationship data for the battery.

Mechanical measurement of state of health and state of charge for intercalation batteries

A microscope, comprising a stage onto which is placed an item, a lens having a tunable acoustic gradient index of refraction (TAG lens) sufficiently proximate to said stage to magnify an image of the item, a viewing point for providing for viewing of the magnified image, and a pulsed illuminator capable of illuminating the stage and synchronously pulsed with an operating frequency of the TAG lens.

Growing community of inventors

Princeton, NJ, United States of America

Craig B Arnold