Patents by Inventor Xuefeng Guo
Xuefeng Guo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240158208Abstract: The present invention discloses a centroid adjustment device suitable for different types of loads, which belongs to the field of transportation and support technology, including an upper adjustment assembly, a connecting module, and a loading device. The connecting module includes connecting pieces and chain connection assemblies adjustable in length, both upper ends of the connecting pieces and the chain connection assemblies are respectively mounted on opposite sides of the centroid of the upper adjustment assembly and can be adjusted to move toward or away from each other at an upper end of the upper adjustment assembly, and both lower ends of the connecting pieces and the chain connection assemblies are respectively mounted on opposite sides of the centroid of the loading device.Type: ApplicationFiled: November 14, 2023Publication date: May 16, 2024Inventors: Yubin YANG, Mingxing ZHANG, Zhimin LIU, Zhiqiang HAN, Feng GUO, Song CHEN, Xiangzhen CHENG, Hongliang LIU, Guojun MA, Yonggang XU, Jianhua WU, Shengneng CHEN, Xuefeng GAO, Lin ZHOU, Yumin JIANG
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Patent number: 11545640Abstract: Disclosed are a series of photoisomeric compounds, preparation method therefor and device comprising the compounds, wherein a photoisomeric compound-graphene molecular junction device is formed by linking the photoisomeric compound to a gap of two-dimensional monolayer graphene having a nano-gap array via an amide covalent bond. When a single photoisomeric compound is bridged to the gap of the two-dimensional monolayer graphene having a nano-gap array, the devices have a reversible light-controlled switching function and a reversible electrically-controlled switching function. A molecular switch device prepared by the method can achieve a high reversibility and a good reproducibility. The number of light-controlled switching cycles can exceed 104, and the number of electrically-controlled switching cycles can reach about 105 or greater. Moreover, the above-mentioned reversible molecular switch device remains stable within a period of more than one year.Type: GrantFiled: January 27, 2021Date of Patent: January 3, 2023Assignee: PEKING UNIVERSITYInventors: Xuefeng Guo, Chuancheng Jia, Na Xin, Hongliang Chen, Mingliang Li, Dahui Qu
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Patent number: 11472923Abstract: The present invention provides a process of using an alloy nanoparticle catalyst to catalyze one pot chemical reactions for synthesizing functional polymers with controlled polymerization and properties. In particular, the present invention provides a process of using an AuPd NP catalyst to catalyze one pot chemical reactions for synthesizing polybenzoxazole with controlled polymerization and improved chemical stability.Type: GrantFiled: March 24, 2020Date of Patent: October 18, 2022Assignee: Brown UniversityInventors: Shouheng Sun, Chao Yu, Xuefeng Guo, Christopher Seto
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Publication number: 20220162389Abstract: The present invention provides a process of using an alloy nanoparticle catalyst to catalyze one pot chemical reactions for synthesizing functional polymers with controlled polymerization and properties. In particular, the present invention provides a process of using an AuPd NP catalyst to catalyze one pot chemical reactions for synthesizing polybenzoxazole with controlled polymerization and improved chemical stability.Type: ApplicationFiled: March 24, 2020Publication date: May 26, 2022Inventors: Shouheng SUN, Chao YU, Xuefeng GUO, Christopher SETO
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Publication number: 20210234109Abstract: Disclosed are a series of photoisomeric compounds, preparation method therefor and device comprising the compounds, wherein a photoisomeric compound-graphene molecular junction device is formed by linking the photoisomeric compound to a gap of two-dimensional monolayer graphene having a nano-gap array via an amide covalent bond. When a single photoisomeric compound is bridged to the gap of the two-dimensional monolayer graphene having a nano-gap array, the devices have a reversible light-controlled switching function and a reversible electrically-controlled switching function. A molecular switch device prepared by the method can achieve a high reversibility and a good reproducibility. The number of light-controlled switching cycles can exceed 104, and the number of electrically-controlled switching cycles can reach about 105 or greater. Moreover, the above-mentioned reversible molecular switch device remains stable within a period of more than one year.Type: ApplicationFiled: January 27, 2021Publication date: July 29, 2021Inventors: Xuefeng GUO, Chuancheng JIA, Na XIN, Hongliang CHEN, Mingliang LI, Dahui QU
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Publication number: 20210024560Abstract: The application relates to a strongly-polarized molecule of the following general formula: wherein A denotes a group having a polarizability greater than 2 C·m2/V; R1 and R2 are respectively hydrogen, halogen, a hydroxyl group, an amino group, a cyano group, a nitro group, a carboxyl group, a C1-12 alkyl group, a C1-12 alkoxy group, a halogenated C1-12 alkyl group, a halogenated C1-12 alkoxy group, a hydroxyl C1-12 alkyl group, a hydroxyl C1-12 alkoxy group, or a C1-12 alkyl amino group; x1 and x2 denote 0 or an integer no less than 1, respectively; and y1 and y2 denote 0 or an integer no less than 1, respectively. The application further relates to a strongly-polarized molecule-graphene molecule heterojunction, and a single molecule field effect transistor comprising a substrate, a gate, a dielectric layer and the strongly-polarized molecule-graphene molecule heterojunction; and the dielectric layer is located between the gate and the strongly-polarized molecule-graphene molecule heterojuction.Type: ApplicationFiled: March 29, 2019Publication date: January 28, 2021Applicant: Peking UniversityInventors: Xuefeng GUO, Na XIN, Weining ZHANG, Linan MENG
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Publication number: 20200212328Abstract: Disclosed are a series of photoisomeric compounds, preparation method therefor and device comprising the compounds. A photoisomeric compound-grephene molecular junction device is formed by linking the photoisomeric compound to a gap of two-dimensional monolayer graphene having a nano-gap array via an amide covalent bond. When a single photoisomeric compound is bridged to the gap of the two-dimensional monolayer graphene having a nano-gap array, the devices have a reversible light-controlled switching function and a reversible electrically-controlled switching function. A molecular switch device prepared by the method can achieve high reversibility and good reproducibility. The number of light-controlled switching cycles can exceed 104, and the number of electrically-controlled switching cycles can reach about 105 or greater. The reversible molecular switch device remains stable within a period of more than one year.Type: ApplicationFiled: May 24, 2017Publication date: July 2, 2020Inventors: Xuefeng GUO, Chuancheng JIA, Na XIN, Hongliang CHEN, Mingliang LI, Dahui QU
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Publication number: 20190330695Abstract: Disclosed is a DNA sequencing method. The DNA sequencing method provided in the present invention comprises the following steps in order: (1) adding a tag sequence at the 3? terminus of the DNA to be sequenced so as to form a DNA to be sequenced including the tag sequence, the nucleotide sequence of said tag sequence being the reverse complement of the nucleotide sequence of the sequencing primer; (2) mixing the DNA to be sequenced including the tag sequence and the sequencing primer so as to form a product having a 5? terminus double strand and a single main strand; (3) after step (2) is completed, the product is mixed separately with dATP, dCTP, dTTP, and dGTP to obtain four systems, each system is separately added to a single-molecule device modified by a DNA polymerase, and electric signals are read. Experiments verify that the method provided in the present invention performs DNA sequencing and has important application value.Type: ApplicationFiled: October 30, 2017Publication date: October 31, 2019Inventors: Xuefeng GUO, Xiaolong WANG, Haina CI
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Publication number: 20180025362Abstract: Complaint records and a complaint log are created in a complaining method, and a correlation between the complaint records and the complaint log is saved. Relevant people can readily obtain a complaint record relevant to the complaint and an associated log so that fault scenes can be conveniently reproduced. The fault of the tool can be effectively solved.Type: ApplicationFiled: July 19, 2017Publication date: January 25, 2018Inventor: Xuefeng Guo
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Publication number: 20150171326Abstract: The disclosed subject matter provides a techniques for precisely and/or functionally cutting carbon nanotubes, e.g., single walled carbon nanotubes (“SWNTs”) and integrating a single nucleic acid molecule (e.g., a DNA molecule) into a gap formed into the carbon nanotubes. In one aspect, a method of fabricating a molecular electronic device includes disposing a SWNT on a base layer, forming a gap in the SWNT using a lithographic process, and disposing a single DNA strand across the gap so that each end of the nucleic acid contacts a gap termini. The disclosed subject matter also provides techniques for measuring the electrical properties (charge transport) of a DNA molecule which is integrated into an SWNT. Furthermore, a molecular electronic device including an SWNT with an integrated nucleic acid molecule is disclosed.Type: ApplicationFiled: March 3, 2015Publication date: June 18, 2015Applicants: The Trustees of Columbia University in the City of New York, California Institute of TechnologyInventors: Xuefeng Guo, Colin Nuckolls, James Hone, Alon Gorodetsky, Jacqueline K. Barton
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Patent number: 8649764Abstract: A method and system for implementing debit card service based on callback. The method is applied to a mobile terminal set with an automatic dialing function unit, automatic dialing function of the automatic dialing function unit is activated, and a number corresponding to the mobile terminal is bound with one debit card. The method includes the following steps: a preset callback access number is dialed before the called number by the automatic dialing function unit in the mobile terminal to connect the call to a debit card service platform when the mobile terminal calls the called number; the debit card service platform releases the call and calls back the mobile terminal; the called number is continued by the debit card service platform after the mobile terminal answers the callback; the debit card service based on callback is implemented.Type: GrantFiled: May 11, 2010Date of Patent: February 11, 2014Assignee: ZTE CorporationInventors: Fang Xie, Jianjun Yang, Sanping Zhang, Xuefeng Guo
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Publication number: 20120225637Abstract: A method and system for implementing debit card service based on callback. The method is applied to a mobile terminal set with an automatic dialing function unit, automatic dialing function of the automatic dialing function unit is activated, and a number corresponding to the mobile terminal is bound with one debit card. The method includes the following steps: a preset callback access number is dialed before the called number by the automatic dialing function unit in the mobile terminal to connect the call to a debit card service platform when the mobile terminal calls the called number; the debit card service platform releases the call and calls back the mobile terminal; the called number is continued by the debit card service platform after the mobile terminal answers the callback; the debit card service based on callback is implemented.Type: ApplicationFiled: May 11, 2010Publication date: September 6, 2012Applicant: ZTE CORPORATIONInventors: Fang Xie, Jianjun Yang, Sanping Zhang, Xuefeng Guo
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Publication number: 20110275062Abstract: The disclosed subject matter provides a techniques for precisely and/or functionally cutting carbon nanotubes, e.g., single walled carbon nanotubes (“SWNTs”) and integrating a single nucleic acid molecule (e.g., a DNA molecule) into a gap formed into the carbon nanotubes. In one aspect, a method of fabricating a molecular electronic device includes disposing a SWNT on a base layer, forming a gap in the SWNT using a lithographic process, and disposing a single DNA strand across the gap so that each end of the nucleic acid contacts a gap termini. The disclosed subject matter also provides techniques for measuring the electrical properties (charge transport) of a DNA molecule which is integrated into an SWNT. Furthermore, a molecular electronic device including an SWNT with an integrated nucleic acid molecule is disclosed.Type: ApplicationFiled: November 29, 2010Publication date: November 10, 2011Applicants: California Institute Of Technology, The Trustees of Columbia University In the City of New YorkInventors: Xuefeng Guo, Colin Nuckolls, James Hone, Alon Gorodetsky, Jacqueline K. Barton
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Patent number: 7928432Abstract: The present invention generally relates to the fabrication of molecular electronics devices from molecular wires and Single Wall Nanotubes (SWNT). In one embodiment, the cutting of a SWNT is achieved by opening a window of small width by lithography patterning of a protective layer on top of the SWNT, followed by applying an oxygen plasma to the exposed SWNT portion. In another embodiment, the gap of a cut SWNT is reconnected by one or more difunctional molecules having appropriate lengths reacting to the functional groups on the cut SWNT ends to form covalent bonds. In another embodiment, the gap of a cut SWNT gap is filled with a self-assembled monolayer from derivatives of novel contorted hexabenzocoranenes. In yet another embodiment, a device based on molecular wire reconnecting a cut SWNT is used as a sensor to detect a biological binding event.Type: GrantFiled: June 13, 2008Date of Patent: April 19, 2011Assignee: The Trustees Of Columbia University In The City Of New YorkInventors: Colin Nuckolls, Xuefeng Guo, Philip Kim
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Publication number: 20090027036Abstract: The present invention generally relates to the fabrication of molecular electronics devices from molecular wires and Single Wall Nanotubes (SWNT). In one embodiment, the cutting of a SWNT is achieved by opening a window of small width by lithography patterning of a protective layer on top of the SWNT, followed by applying an oxygen plasma to the exposed SWNT portion. In another embodiment, the gap of a cut SWNT is reconnected by one or more difunctional molecules having appropriate lengths reacting to the functional groups on the cut SWNT ends to form covalent bonds. In another embodiment, the gap of a cut SWNT gap is filled with a self-assembled monolayer from derivatives of novel contorted hexabenzocoranenes. In yet another embodiment, a device based on molecular wire reconnecting a cut SWNT is used as a sensor to detect a biological binding event.Type: ApplicationFiled: June 13, 2008Publication date: January 29, 2009Applicant: The Trustees Of Columbia University In The City Of New YorkInventors: Colin Nuckolls, Xuefeng Guo, Philip Kim, Shengxiong Xiao, Mathew Benjamin Myers
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Publication number: 20090017571Abstract: The present invention generally relates to the fabrication of molecular electronics devices from molecular wires and Single Wall Nanotubes (SWNT). In one embodiment, the cutting of a SWNT is achieved by opening a window of small width by lithography patterning of a protective layer on top of the SWNT, followed by applying an oxygen plasma to the exposed SWNT portion. In another embodiment, the gap of a cut SWNT is reconnected by one or more difunctional molecules having appropriate lengths reacting to the functional groups on the cut SWNT ends to form covalent bonds. In another embodiment, the gap of a cut SWNT gap is filled with a self-assembled monolayer from derivatives of novel contorted hexabenzocoranenes. In yet another embodiment, a device based on molecular wire reconnecting a cut SWNT is used as a sensor to detect a biological binding event.Type: ApplicationFiled: June 13, 2008Publication date: January 15, 2009Applicant: The Trustees Of Columbia University In The City Of New YorkInventors: Colin Nuckolls, Xuefeng Guo, Philip Kim
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Publication number: 20070292601Abstract: The present invention generally relates to the fabrication of molecular electronics devices from molecular wires and Single Wall Nanotubes (SWNT). In one embodiment, the cutting of a SWNT is achieved by opening a window of small width by lithography patterning of a protective layer on top of the SWNT, followed by applying an oxygen plasma to the exposed SWNT portion. In another embodiment, the gap of a cut SWNT is reconnected by one or more difunctional molecules having appropriate lengths reacting to the functional groups on the cut SWNT ends to form covalent bonds. In another embodiment, the gap of a cut SWNT gap is filled with a self-assembled monolayer from derivatives of novel contorted hexabenzocoranenes. In yet another embodiment, a device based on molecular wire reconnected a cut SWNT is used as a sensor to detect a biological binding event.Type: ApplicationFiled: December 4, 2006Publication date: December 20, 2007Inventors: Colin Nuckolls, Xuefeng Guo, Philip Kim, Shengxiong Xiao, Matthew Myers