Methods of forming colloidal nanocrystal (NC)-based thin film devicesare disclosed. The methods include the steps of depositing a dispersion of NCs on a substrate to form a NC thin-film, wherein at least a portion of the NCs is capped with chalcogenocyanate (xCN)-based ligands; and doping the NC thin-film with a metal.

Disclosed is a method of manufacturing an electroconductive nanowire network using an electron beam, the method comprising: forming a nanowire network using electroconductive nanowires; and welding junctions of the electroconductive nanowires by irradiating an electron beam on the nanowire network, wherein the electroconductive nanowires comprise silver (Ag) nanowires and the forming of the nanowire network comprises forming the nanowire network by spin-coating a suspension in which isopropyl alcohol (IPA) and the Ag nanowires are mixed.

A method of synthesis of two-dimensional (2D) nanoflakes comprises the cutting of prefabricated nanoparticles. The method allows high control over the shape, size and composition of the 2D nanoflakes, and can be used to produce material with uniform properties in large quantities. Van der Waals heterostructure devices are prepared by fabricating nanoparticles, chemically cutting the nanoparticles to form nanoflakes, dispersing the nanoflakes in a solvent to form an ink, and depositing the ink to form a thin film.

The discrimination ability of a chemical sensing cross-reactive arrays is enhanced by constructing sensing elements in two dimensions, first in the x-y plane of the substrate, second in the z dimension so that the sensors are vertically stacked on top of one another. Stacking sensing elements on top of one another adds to the discrimination ability by enabling the characteristic measurement of how fast target chemicals are passing through the stack of sensors. The new invention also allows the ability to discriminate components in a sample mixture by separating them using their innate difference in diffusional rates. Multi-sensor response patterns at each z level of sensors and time delay information from the sample passing from one level to the next are used to generate the response vector. The response vector is used to identify individual component samples and components in a mixture sample.

In one aspect, compositions comprising copper-silica (CuSiO.sub.2) core-shell nanoparticles are described herein. The core-shell nanoparticles comprise copper (Cu) core components and silica (SiO.sub.2) shell components encapsulating the core components. In some embodiments, the nanoparticle compositions comprise a continuous aqueous phase and a population of copper-silica (CuSiO.sub.2) core-shell nanoparticles dispersed in the aqueous phase.

The invention is a SPR sensor that comprises a multi-layered plasmonic structure on a substrate for sensing. The SPR sensor has an enhanced figure of merit and lower limit of detection (system noise divided by the sensitivity) by at least two orders of magnitude than prior art SPR sensors. The plasmonic structure of the invention comprises a Nanostructured Porous Metal Layer (NPML) and at least one of: (a) buried dielectric layer under the nano-porous metal layer; (b) a nano-dimensional high index layer on top of the metal layer; and (c) a molecular layer for bio-functionalization adjacent to an analyte layer. The invention also encompasses many embodiments of measuring systems that comprise the SPR sensors of the invention with improved signal to noise ratio.

In various embodiments the present disclosure provides a core/shell nanocrystal comprising a core and a shell formed on the core, wherein the core/shell nanocrystal is co-doped with at least one metal dopant and at least one trivalent cation. In some embodiments, the trivalent cation is a Group 13 element. Methods of making and using the core/shell nanocrystal are also described.

A broad-band photodetector utilizes perovskite hybrid material and quantum dots as light harvesters. In particular, the photodetector is configured so that the structural defects on the surface of a quantum dot layer are passivated with perovskite hybrid material. As a result, the trap states on the surface of the quantum dot material is reduced, allowing leakage currents in the quantum dot material to be significantly reduced. As such, the photodetector is able to achieve broad-band operation, with enhanced photoresponsitivity and detectivity.

An object of the present invention is to provide a method for accurately forming an antenna substrate as well as an antenna substrate with wiring line and electrode by a coating method. One aspect of the present invention provides a method for producing an antenna substrate with wiring line and electrode including the steps of: (1) forming a coating film using a photosensitive paste containing a conductive material and a photosensitive organic component on an insulating substrate; (2-A) processing the coating film into a pattern corresponding to an antenna by photolithography; (2-B) processing the coating film into a pattern corresponding to a wiring line; (2-C) processing the coating film into a pattern corresponding to an electrode; (3-A) curing the pattern corresponding to an antenna into an antenna; (3-B) curing the pattern corresponding to a wiring line into a wiring line; and (3-C) curing the pattern corresponding to an electrode into an electrode.

Systems and methods are described that relate to an optical system including an image sensor optically-coupled to at least one nanophotonic element. The image sensor may include a plurality of superpixels. Each respective superpixel of the plurality of superpixels may include at least a respective first pixel and a respective second pixel. The at least one nanophotonic element may have an optical phase transfer function and may include a two-dimensional arrangement of sub-wavelength regions of a first material interspersed within a second material, the first material having a first index of refraction and the second material having a second index of refraction. The nanophotonic element is configured to direct light toward individual superpixels in the plurality of superpixels, and to direct light toward the first or second pixel in each individual superpixel based on a wavelength dependence or a polarization dependence of the optical phase transfer function.