CAS: 12069-00-0; Lead Selenide

专利信息

专利号:US-7118627-B2
优先权日:2003-12-04
标 题 :Synthesis of colloidal PbS nanocrystals with size tunable NIR emission
发明人：HINES MARGARET A; SCHOLES GREGORY D
权利人:HINES MARGARET A; SCHOLES GREGORY D
摘要:The present invention discloses a method for synthesis of narrowly dipsersed colloidal PbS nanocrystals that offer size-tunable near-infrared emission. The stability and processibility of these near-infrared emitting quantum dots makes them ideal materials for device applications. The use of cost-effective and non-pyrophoric precursors as well as the success of larger scale reactions means the present invention provides a method for the industrial scale production of PbS nanocrystals.

专利号:US-10125311-B1
优先权日:2015-03-20
标题 :Functionalized fluorescent nanoparticles, methods of synthesis and methods of use
发明人：MEYLEMANS HEATHER A; CAMBREA LEE R; KOOIMA MADELINE
权利人:US NAVY
摘要:A method for the fluorescence detection of metal ions and other environmental hazards utilizing ligand functionalized fluorescent nanoparticles. Synthesis of the non-toxic, air, and water stable nanoparticles has been optimized. The fluorescent nanoparticles of the present invention are made from varying ratios of metals including zinc, silver, copper, and indium and sulfur. By varying the ratios of these metals we are able to synthesize nanoparticles that emit over a large range of the visible spectrum. Charge transfer between a target molecule and the nanoparticle is readily identified by a fluorescence change allowing for a fast, simple, visual detection system without the need for expensive analytical instrumentation.

专利号:US-9505618-B2
优先权日:2013-11-27
标 题:Synthesis and characterization of lead selenide capped with a benzoate ligand
发明人：SANTIAGO BERRÃ?OS MITK'EL B; RODRÃ?GUEZ RODRÃ?GUEZ WEYSHLA A
权利人:SANTIAGO BERRÃ?OS MITK'EL B; RODRÃ?GUEZ RODRÃ?GUEZ WEYSHLA A; ANA G MÉNDEZ UNIV SYSTEM
摘要:Semiconductor materials offer several potential benefits as active elements in the development of harvesting-energy conversion technologies. In particular, lead selenide (PbSe) semiconductors have been used and proposed to design solar energy harvesting devices, IR sensors, FET devices, amongst others. The present disclosure provides a simple, low cost synthesis of lead selenide using benzoic acid as the capping ligand in an opened environment. The use of an aromatic ligand, and mores specifically benzoic acid, provides robustness and more durability to the lead selenide, and therefore prevents the lead selenide from breaking or cracking easily. Also the aromatic ligand prevents the degradation and oxidation of the lead selenide, without affecting any of the lead selenide electronic and chemical characteristics.

专利号:US-9273410-B2
优先权日:2009-01-16
标 题 :Low-temperature synthesis of colloidal nanocrystals
发明人：BARTL MICHAEL H; SIY JACQUELINE T
权利人:BARTL MICHAEL H; SIY JACQUELINE T; UNIV UTAH RES FOUND
摘要:Low-temperature organometallic nucleation and crystallization-based synthesis methods for the fabrication of semiconductor and metal colloidal nanocrystals with narrow size distributions and tunable, size- and shape-dependent electronic and optical properties. Methods include (1) forming a reaction mixture in a reaction vessel under an inert atmosphere that includes at least one solvent, a cationic precursor, an anionic precursor, and at least a first surface stabilizing ligand while stirring at a temperature in a range from about 50° C. to about 130° C. and (2) growing nanocrystals in the reaction mixture for a period of time while maintaining the temperature, the stirring, and the inert-gas atmosphere.

专利号:US-10119953-B1
优先权日:2015-03-20
标 题 :Metal chalcogenide quantum dots for the detection of nitroaromatic chemicals
发明人：BACA ALFRED J; MEYLEMANS HEATHER A; CAMBREA LEE R; BALDWIN LAWRENCE
权利人:US NAVY; US NAVY
摘要:The synthesis of AgInS 2 based quantum dots and their use as fluorometric probes for the selective detection of nitroaromatic explosive chemicals, without the use of ligands specific to nitroaromatic explosive chemicals. These quantum dots allow the detection of nitroaromatic explosive molecules by eye. The present invention also represents a simple patterning method for quantum dots on substrates, including low cost filter paper. The ease of fabrication, use of less toxic materials, and the selectivity to nitroaromatic explosive chemicals results in a practical solution to the development of a portable fluorescent probe based on quantum dots for the detection of nitroaromatic explosive chemicals.

专利号:US-8137457-B2
优先权日:2004-07-23
标题 :One-pot synthesis of high-quality metal chalcogenide nanocrystals without precursor injection
发明人：CAO YUNWEI CHARLES; CHEN OU
权利人:CAO YUNWEI CHARLES; CHEN OU; UNIV FLORIDA
摘要:A method of forming monodisperse metal chalcogenide nanocrystals without precursor injection, comprising the steps of: combining a metal source, a chalcogen oxide or a chalcogen oxide equivalent, and a fluid comprising a reducing agent in a reaction pot at a first temperature to form a liquid comprising assembly; increasing the temperature of the assembly to a sufficient-temperature to initiate nucleation to form a plurality of metal chalcogenide nanocrystals; and growing the plurality of metal chalcogenide nanocrystals without injection of either the metal source or the chalcogen oxide at a temperature equal to or greater than the sufficient-temperature, wherein crystal growth proceeds substantially without nucleation to form a plurality of monodisperse metal chalcogenide nanocrystals. Well controlled monodispersed CdSe nanocrystals of various sizes can be prepared by choice of the metal source and solvent system.