Abstract: A method of making a semiconductor nanocrystal can include contacting an M-containing compound with an X donor having the formula X(Y(R)3)3, where X is a group V element and Y is a group IV element.

Abstract: A method and system for medical imaging employs an excitation source configured to cause an object having a plurality of cells to at least one of emit, reflect, and fluoresce light. An optical receptor is employed that is configured to receive the light from the object. A filter assembly receives the light from the optical receptor and filters the light. An image processor having a field of view (FOV) substantially greater than a diameter of a cell of the object and an analysis resolution substantially matched to the diameter of a cell of the object that receives the filtered light from the filter and analyzes the filtered light corresponding to each cell in the FOV. A feedback system is provided that is configured to provide an indication of a state of each cell in the FOV and a location of a cell in the FOV meeting a predetermined condition.

Abstract: A solar cell and method of making are disclosed. The solar cell includes an acceptor layer a donor layer treated with a first quantum dot (QD) ligand and a blocking layer treated with a second, different, QD ligand. The acceptor layer has an acceptor layer valence band and an acceptor layer conduction band. The donor layer has a donor layer valence band and a donor layer conduction band, the donor layer valence band is higher than the acceptor layer valence band, the donor layer conduction band is higher than the acceptor layer conduction band. The blocking layer least partially blocks electron flow in at least one direction, the blocking layer having a blocking layer valence band and a blocking layer conduction band, the blocking layer valence band is higher than the donor layer valence band, the blocking layer conduction band is higher than the donor layer conduction band.

Abstract: A white light emitting semiconductor nanocrystal includes a plurality of semiconductor nanocrystals.

Abstract: A nanocrystal capable of light emission includes a nanoparticle having photoluminescence having quantum yields of greater than 30%.

Abstract: A water soluble nanoparticle can include a ligand of formula (I). The ligand can provide zwitterionic character and can provide water solubility, small hydrodynamic diameter, chemical stability, and the capability to modify the nanoparticle with additional functional moieties such as a small molecule, nucleic acid, or protein.

Abstract: Disclosed are a device and a method for the design and fabrication of the device for enhancing the brightness of luminescent molecules, nanostructures, and thin films. The device includes a mirror, a dielectric medium or spacer, an absorptive layer, and a luminescent layer. The absorptive layer is a continuous thin film of a strongly absorbing organic or inorganic material. The luminescent layer may be a continuous luminescent thin film or an arrangement of isolated luminescent species, e.g., organic or metal-organic dye molecules, semiconductor quantum dots, or other semiconductor nanostructures, supported on top of the absorptive layer.

Abstract: Water soluble InAs(ZnCdS) semiconductor nanocrystals with bright and stable emission in the near infrared (NIR) wavelength range have been prepared. The NIR semiconductor nanocrystals can be functionalized to enable imaging of specific cellular proteins. In addition, the utility of the NIR region for in vivo biological imaging is clearly demonstrated by the superior ability of InAs(ZnCdS) semiconductor nanocrystals to image tumor vasculature.

Abstract: A method and system for medical imaging employs an excitation source configured to cause an object having a plurality of cells to at least one of emit, reflect, and fluoresce light. An optical receptor is employed that is configured to receive the light from the object. A filter assembly receives the light from the optical receptor and filters the light. An image processor having a field of view (FOV) substantially greater than a diameter of a cell of the object and an analysis resolution substantially matched to the diameter of a cell of the object that receives the filtered light from the filter and analyzes the filtered light corresponding to each cell in the FOV. A feedback system is provided that is configured to provide an indication of a state of each cell in the FOV and a location of a cell in the FOV meeting a predetermined condition.

Abstract: A method of imaging microscopic objects includes determining the relative depths of two or more semiconductor nanocrystals by analyzing images of the semiconductor nanocrystals at varying z-displacements.

Abstract: A light emitting device includes an electroluminescent material and semiconductor nanocrystals. The semiconductor nanocrystals accept energy from the electroluminescent material and emit light.

Abstract: A population of semiconductor nanocrystals can include cores including a II-V semiconductor material, e.g., Cd3As2. The population can be monodisperse and can have a quantum yield of 20% or greater. A size-series of populations can have emission wavelengths falling in the range of about 530 nm to about 2000 nm.

Abstract: Disclosed are a device and a method for the design and fabrication of the device for enhancing the brightness of luminescent molecules, nanostructures, and thin films. The device includes a mirror, a dielectric medium or spacer, an absorptive layer, and a luminescent layer. The absorptive layer is a continuous thin film of a strongly absorbing organic or inorganic material. The luminescent layer may be a continuous luminescent thin film or an arrangement of isolated luminescent species, e.g., organic or metal-organic dye molecules, semiconductor quantum dots, or other semiconductor nanostructures, supported on top of the absorptive layer.

Abstract: A nanomaterial can include an outer layer including a ligand. The ligand can include a first monomer unit including a first moiety having affinity for a surface of the nanocrystal, a second monomer unit including a second moiety having a high water solubility, and a third monomer unit including a third moiety having a selectively reactive functional group or a selectively binding functional group. The ligand can be a random copolymer.

Abstract: An optical resonator can include an optical feedback structure disposed on a substrate, and a composite including a matrix including a chromophore. The composite disposed on the substrate and in optical communication with the optical feedback structure. The chromophore can be a semiconductor nanocrystal. The resonator can provide laser emission when excited.

Abstract: The present invention provides compositions and methods for imaging, for example, tumor resections.

Abstract: A nanocrystal capable of light emission includes a nanoparticle having photoluminescence having quantum yields of greater than 30%.

Abstract: Microparticles and nanoparticles and compositions thereof are provided. The microparticles and nanoparticles and compositions may be used for the treatment of musculoskeletal disease, such as osteoarthritis and injury.

Abstract: A near-infrared light emitting device can include semiconductor nanocrystals that emit at wavelengths beyond 1 ?m. The semiconductor nanocrystals can include a core and an overcoating on a surface of the core.

Abstract: Nanoparticles for a selective, two stage delivery to tumors have been developed. The nanoparticles are initially sized so that they preferentially accumulate in the tumor tissue as a result of leakage through the defective vascular in the solid tumors. Once in the tumor tissue, the nanoparticles are cleaved hydrolytically and/or by enzymatic cleavage over time to release smaller nanoparticles carrying therapeutic, prophylactic or diagnostic agents into the necrotic interior of the tumors. This provides a simple, elegant and highly effective means of delivery drug selectively not just to tumors generally, but, more importantly, into the poorly vascularized necrotic interiors which drugs are normally unable to penetrate. The nanoparticles have a number of advantages: less toxicity due to selective accumulation only in the tumors; access into the poorly vascularized necrotic interiors of the tumor; and sustained release over a period of time within the tumor.