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公开(公告)号：US11982005B2
公开(公告)日：2024-05-14
申请号：US17155180
申请日：2021-01-22
发明人： Jingshan Du , Qian Rong , Vinayak P. Dravid
CPC分类号： C25B1/04 , C01G53/04 , C01G53/40 , C23C18/1216 , C23C18/1225 , C23C18/1266 , C01P2002/50 , C01P2002/72 , C01P2002/85 , C01P2004/04 , C01P2004/24 , C01P2006/40
摘要： Electrocatalytic materials and methods of making the electrocatalytic materials are provided. Such a method may comprise forming precursor nanosheets comprising a precursor metal on a surface of a substrate; exposing the precursor nanosheets to a modifier solution comprising a polar, aprotic solvent and a metal salt at a temperature and for a period of time, the metal salt comprising a metal cation and an anion, thereby forming modified precursor nanosheets; and calcining the modified precursor nanosheets for a period of time to form an electrocatalytic material comprising structurally modified nanosheets and the substrate, each nanosheet extending from the surface of the substrate and having a solid matrix. The solid matrix defines pores distributed throughout the solid matrix and comprises a precursor metal oxide and domains of another metal oxide distributed throughout the precursor metal oxide; or the solid matrix comprises the precursor metal oxide and nanoparticles of the another metal oxide distributed on a surface of the solid matrix.
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公开(公告)号：US20240141468A1
公开(公告)日：2024-05-02
申请号：US18406317
申请日：2024-01-08
发明人： Xiaobing Hu , Shaozun Liu , Chunxu Wang , Yong Li , Vinayak P. Dravid
摘要： A medium heavy alloy (MHA) and a fabrication method thereof are disclosed. The MHA includes a composition designed and processed such that the MHA has properties comprising a tensile strength of about 1527 MPa, a proof strength of about 1337 MPa, and an impact toughness of about 180 J, when the MHA is forged, and the tensile strength of about 1746 MPa, the proof strength of about 1571 MPa, and the impact toughness of about 55 J, when the MHA is agedly treated. The method includes providing a composition designed according to design specifications of the MHA; forming a cast alloy from the composition by a metallurgy process; and forged the cast alloy at a first temperature to form the MHA having properties that are the design specifications.
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公开(公告)号：US11905585B2
公开(公告)日：2024-02-20
申请号：US17606484
申请日：2020-05-04
发明人： Xiaobing Hu , Shaozun Liu , Chunxu Wang , Yong Li , Vinayak P. Dravid
摘要： A novel medium heavy alloy (MHA) a composition designed and processed such that the MHA has properties comprising a tensile strength of about 1527 MPa, a proof strength of about 1337 MPa, and an impact toughness of about 180 J, when the MHA is forged, and the tensile strength of about 1746 MPa, the proof strength of about 1571 MPa, and the impact toughness of about 55 J, when the MHA is agedly treated. The superior strength-toughness is attributed to the face-centered cubic matrix and/or the nano-sized secondary phases. The superior dynamic performance is attributed to the widening of adiabatic shear bands.
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公开(公告)号：US20230286047A1
公开(公告)日：2023-09-14
申请号：US18118031
申请日：2023-03-06
发明人： Chad A. Mirkin , Vinayak P. Dravid , Liban Jibril
摘要： A method of forming a nanoparticle can include admixing an aqueous solution into an oil-phase to thereby form an emulsion of droplets of the aqueous solution in the oil phase, the aqueous solution comprising a nanostructure precursor and a polymer, adding a silane precursor and catalyst to form a silica shell around each of the droplets to nanoreactors; annealing at a first temperature below the decomposition temperature of the polymer to aggregate the nanostructure precursor within the nanoreactor; and annealing at a second temperature above the decomposition temperature of the polymer to convert the aggregated nanostructure precursor to the nanostructure and decompose the polymer.
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公开(公告)号：US20230018759A1
公开(公告)日：2023-01-19
申请号：US17782613
申请日：2020-12-04
发明人： Chad A. Mirkin , Jingshan Du , Donghoon Shin , Vinayak P. Dravid
IPC分类号： C01G21/16 , C09D11/322
摘要： A method of forming a halide perovskite nanocrystal array having a plurality of halide perovskite nanocrystals arranged in a pattern can include coating an array of pens with a first ink comprising at least one first perovskite precursor having the formula AX and at least one second perovskite precursor having the formula BX′2 dissolved in a solvent. A is a cation, B is a metal, and X and X′ are each a halogen. The method further includes contacting a substrate with the coated pen array to thereby deposit the first ink indias a pattern of printed indicia on the substrate. The printed indicia form nanoreactors on the substrate and a halide perovskite nanocrystal nucleates and grows within each nanoreactor to form the halide perovskite nanocrystal array.
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公开(公告)号：US20220118422A1
公开(公告)日：2022-04-21
申请号：US17417684
申请日：2019-12-20
发明人： Vikas Nandwana , Vinayak P. Dravid
IPC分类号： B01J20/26 , C09K3/32 , B01J20/20 , B01J20/06 , B01J20/28 , B01J20/32 , C02F1/28 , C10G25/00 , C11B13/04
摘要： Oleophilic-hydrophobic-magnetic (OHM) porous materials are provided. In embodiments, an OHM porous material comprises a porous substrate having a solid matrix defining a plurality of pores distributed through the solid matrix, the OHM porous material further comprising a coating of a nanocomposite on surfaces of the solid matrix. The nanocomposite comprises a multilayer stack of a plurality of layers of a two-dimensional, layered material having nucleation sites interleaved between a plurality of layers of magnetic nanoparticles, wherein individual layers of magnetic nanoparticles in the plurality of layers of magnetic nanoparticles are each directly anchored on a surface of a layer of the plurality of layers of the two-dimensional, layered material via the nucleation sites, and are each separated by multiple layers of the plurality of layers of the two-dimensional, layered material. Methods of making and using the OHM porous materials are also provided.
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公开(公告)号：US20220059839A1
公开(公告)日：2022-02-24
申请号：US17417328
申请日：2019-12-20
发明人： Vikas Nandwana , Vinayak P. Dravid
摘要： Methods of forming a nanocomposite of a base material and a plurality of nanoparticles are provided. In embodiments, the method comprises combining a first input stream of flowing fluid comprising a base material having nucleation sites, a second input stream of flowing fluid comprising a nanoparticle precursor material, and a third input stream of flowing fluid comprising a nanoparticle nucleation agent, to form an output stream of flowing fluid; heating or sonicating or both heating and sonicating the output stream for a period of time; and collecting a nanocomposite formed within the fluid of the output stream, the nanocomposite comprising the base material and a plurality of nanoparticles directly anchored onto a surface of the base material via the nucleation sites. The nanocomposites are also provided.
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公开(公告)号：US11120968B2
公开(公告)日：2021-09-14
申请号：US16758326
申请日：2018-10-25
发明人： Karl A. Hujsak , Vinayak P. Dravid
IPC分类号： H01J37/28 , G01N23/2251
摘要： Aspects of the present disclosure involve applying a Multi-Objective Autonomous Dynamic Sampling algorithm in an electron or other radiation/charged-particle microscope for the characterization of elemental, chemical, and crystallographic information with over an order of magnitude improvement in time and exposure.
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29.发明申请公开(公告)号：US20210199604A1
公开(公告)日：2021-07-01
申请号：US16771176
申请日：2019-01-31
IPC分类号： G01N23/203 , G06T7/30 , G01N23/207 , G06N20/00 , G01N23/2251
摘要： A system to generate orientation maps includes a measurement system configured to capture a plurality images of a sample and a computing device in operable communication with the measurement system. The computing device is configured to align the plurality of images of the sample and process the aligned plurality of images to detect one or more regions of interest. The computing device is also configured to generate one or more electron channeling patterns (ECPs) corresponding to the sample based on the one or more regions of interest. The computing device is further configured to generate an orientation map of the sample based on the one or more ECPs.
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公开(公告)号：US20210107792A1
公开(公告)日：2021-04-15
申请号：US16638548
申请日：2018-08-14
发明人： Vikas Nandwana , Vinayak P. Dravid
摘要： Methods for making nanocomposites are provided. In an embodiment, such a method comprises combining a first type of nanostructure with a bulk material in water or an aqueous solution, the first type of nanostructure functionalized with a functional group capable of undergoing van der Waals interactions with the bulk material, whereby the first type of nanostructure induces exfoliation of the bulk material to provide a second, different type of nanostructure while inducing association between the first and second types of nanostructures to form the nanocomposite.
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