Patents by Inventor Yuhuang Wang
Yuhuang Wang 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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Patent number: 8220317Abstract: Massive parallel printing of structures and nanostructures at high speed with high resolution and high quality using two dimensional arrays comprising cantilevers and tip-based transfer of material to a surface. The array is designed so only tips touch the surface. This can be accomplished by long tips and bent cantilevers and alignment. An article comprising: a two-dimensional array of a plurality of cantilevers, wherein the array comprises a plurality of base rows, each base row comprising a plurality of cantilevers, wherein each of the cantilevers comprise tips at the cantilever end away from the base, wherein the number of cantilevers is greater than 250, and wherein the tips have an apex height relative to the cantilever of at least four microns, and a support for the array. Combinatorial arrays and bioarrays can be prepared. The arrays can be manufactured by micromachining methods.Type: GrantFiled: March 23, 2007Date of Patent: July 17, 2012Assignees: Northwestern University, NanoInk, Inc.Inventors: Chad A. Mirkin, Khalid Salaita, Yuhuang Wang, Joseph S. Fragala, Raymond R. Shile
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Patent number: 8192794Abstract: Massive parallel printing of structures and nanostructures, including lipids, at high speed with high resolution and high quality using two dimensional arrays comprising cantilevers and tip-based transfer of material to a surface. The invention provides a nanolithographic method comprising (1) providing a two-dimensional array of a plurality of cantilevers, wherein the array comprises a plurality of base rows, each base row comprising a plurality of cantilevers extending from the base row, wherein each of the cantilevers comprising tips at the cantilever end away from the base row; wherein the two dimensional array has a support; (2) providing a patterning composition, wherein the composition comprises one or more lipids; (3) providing a substrate; (4) coating the tips of the cantilevers with the patterning composition; and (5) depositing at least some of the patterning composition from the tips to the substrate surface.Type: GrantFiled: December 12, 2007Date of Patent: June 5, 2012Assignees: Northwestern University, Karlsruhe Institute of TechnologyInventors: Chad A. Mirkin, Peng Sun, Yuhuang Wang, Steven Lenhert
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Patent number: 8080314Abstract: Methods and articles providing for precise aligning, positioning, shaping, and linking of nanotubes and carbon nanotubes. An article comprising: a solid surface comprising at least two different surface regions including: a first surface region which comprises an outer boundary and which is adapted for carbon nanotube adsorption, and a second surface region which is adapted for preventing carbon nanotube adsorption, the second region forming an interface with the outer boundary of the first region, at least one carbon nanotube which is at least partially selectively adsorbed at the interface. The shape and size of the patterns on the surface and the length of the carbon nanotube can be controlled to provide for selective interfacial adsorption.Type: GrantFiled: May 6, 2011Date of Patent: December 20, 2011Assignee: Northwestern UniversityInventors: Chad A. Mirkin, Yuhuang Wang, Daniel Maspoch
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Publication number: 20110212300Abstract: Methods and articles providing for precise aligning, positioning, shaping, and linking of nanotubes and carbon nanotubes. An article comprising: a solid surface comprising at least two different surface regions including: a first surface region which comprises an outer boundary and which is adapted for carbon nanotube adsorption, and a second surface region which is adapted for preventing carbon nanotube adsorption, the second region forming an interface with the outer boundary of the first region, at least one carbon nanotube which is at least partially selectively adsorbed at the interface. The shape and size of the patterns on the surface and the length of the carbon nanotube can be controlled to provide for selective interfacial adsorption.Type: ApplicationFiled: May 6, 2011Publication date: September 1, 2011Inventors: Chad A. MIRKIN, Yuhuang Wang, Daniel Maspoch
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Patent number: 7959974Abstract: Methods and articles providing for precise aligning, positioning, shaping, and linking of nanotubes and carbon nanotubes. An article comprising: a solid surface comprising at least two different surface regions including: a first surface region which comprises an outer boundary and which is adapted for carbon nanotube adsorption, and a second surface region which is adapted for preventing carbon nanotube adsorption, the second region forming an interface with the outer boundary of the first region, at least one carbon nanotube which is at least partially selectively adsorbed at the interface. The shape and size of the patterns on the surface and the length of the carbon nanotube can be controlled to provide for selective interfacial adsorption.Type: GrantFiled: December 4, 2006Date of Patent: June 14, 2011Assignee: Northwestern UniversityInventors: Chad A. Mirkin, Yuhuang Wang, Daniel Maspoch
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Patent number: 7954166Abstract: An improved method of loading tips and other surfaces with patterning compositions or inks for use in deposition. A method of patterning is described, the method comprising: (i) providing at least one array of tips; (ii) providing a plurality of patterning compositions; (iii) ink jet printing at least some of the patterning compositions onto some of the tips; and (iv) depositing at least some of the patterning compositions onto a substrate surface; wherein the ink jet printing is adapted to prevent substantial cross-contamination of the patterning composition on the tips. Good printing reproducibility and control of printing rate can be achieved. The surfaces subjected to ink jet printing can be treated to encourage localization of the ink at the tip. The method is particularly important for high density arrays.Type: GrantFiled: August 8, 2008Date of Patent: May 31, 2011Assignee: Northwestern UniversityInventors: Chad A. Mirkin, Yuhuang Wang, Louise R. Giam, Matthew Park
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Patent number: 7727504Abstract: The present invention is directed to fibers of epitaxially grown single-wall carbon nanotubes (SWNTs) and methods of making same. Such methods generally comprise the steps of: (a) providing a spun SWNT fiber; (b) cutting the fiber substantially perpendicular to the fiber axis to yield a cut fiber; (c) etching the cut fiber at its end with a plasma to yield an etched cut fiber; (d) depositing metal catalyst on the etched cut fiber end to form a continuous SWNT fiber precursor; and (e) introducing feedstock gases under SWNT growth conditions to grow the continuous SWNT fiber precursor into a continuous SWNT fiber.Type: GrantFiled: December 1, 2005Date of Patent: June 1, 2010Assignee: William Marsh Rice UniversityInventors: W. Carter Kittrell, Yuhuang Wang, Myung Jong Kim, Robert H. Hauge, Richard E. Smalley, Irene Morin Marek, legal representative
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Publication number: 20100115672Abstract: A dual tip probe for scanning probe epitaxy and a method of forming the dual tip probe are disclosed. The dual tip probe includes first and second tips disposed on a cantilever arm. The first and second tips can be a reader tip and a synthesis tip, respectively. The first tip can remain in contact with a substrate during writing and provide in situ characterization of the substrate and or structures written, while the second tip can perform in non-contact mode to write and synthesis nanostructures. This feature can allow the dual tip probe to detect errors in a printed pattern using the first tip and correct the errors using the second tip.Type: ApplicationFiled: May 13, 2009Publication date: May 6, 2010Applicant: NORTHWESTERN UNIVERSITYInventors: Chad A. Mirkin, Chang Liu, Yuhuang Wang, Adam B. Braunschweig, Xing Liao, Louise R. Giam, Byung Y. Lee, Shifeng Li
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Publication number: 20100071098Abstract: A dual tip probe for scanning probe epitaxy is disclosed. The dual tip probe includes first and second tips disposed on a cantilever arm. The first and second tips can be a reader tip and a synthesis tip, respectively. The dual tip probe further includes a rib disposed on the cantilever arm between the first and second tips. The dual tip probe can also include a strain gauge disposed along the length of the cantilever arm.Type: ApplicationFiled: May 13, 2009Publication date: March 18, 2010Applicants: NORTHWESTERN UNIVERSITY, Nanolnk, Inc.Inventors: Chad A. Mirkin, Chang Liu, Yuhuang Wang, Adam B. Braunschweig, Xing Liao, Louise R. Giam, Byung Y. Lee, Shifeng Li, Joseph S. Fragala, Albert K. Henning
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Publication number: 20090325816Abstract: Massive parallel printing of structures and nanostructures, including lipids, at high speed with high resolution and high quality using two dimensional arrays comprising cantilevers and tip-based transfer of material to a surface. The array is designed so only tips touch the surface. This can be accomplished by long tips and bent cantilevers and alignment. An article comprising: a two-dimensional array of a plurality of cantilevers, wherein the array comprises a plurality of base rows, each base row comprising a plurality of cantilevers, wherein each of the cantilevers comprise tips at the cantilever end away from the base, wherein the number of cantilevers is greater than 250, and wherein the tips have an apex height relative to the cantilever of at least four microns, and a support for the array. Combinatorial arrays and bioarrays can be prepared. The arrays can be manufactured by micromachining methods.Type: ApplicationFiled: December 12, 2007Publication date: December 31, 2009Inventors: Chad A. Mirkin, Peng Sun, Yuhuang Wang, Steven Lenhert
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Publication number: 20090280188Abstract: Disclosed herein are asymmetrically functionalized nanoparticles. Further disclosed herein are methods of preparing asymmetrically functionalized nanoparticles. Asymmetrically functionalized nanoparticles can be used in various therapeutic methods.Type: ApplicationFiled: June 25, 2007Publication date: November 12, 2009Applicant: Northwestern UniversityInventors: Chad A. Mirkin, Fengwei Huo, Abigail K.R. Lytton-Jean, Xiaoyang Xu, Nathaniel L. Rosi, Yuhuang Wang
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Patent number: 7585420Abstract: The present invention is generally directed to catalyzed hot stamp methods for polishing and/or patterning carbon nanotube-containing substrates. In some embodiments, the substrate, as a carbon nanotube fiber end, is brought into contact with a hot stamp (typically at 200-800° C.), and is kept in contact with the hot stamp until the morphology/patterns on the hot stamp have been transferred to the substrate. In some embodiments, the hot stamp is made of material comprising one or more transition metals (Fe, Ni, Co, Pt, Ag, Au, etc.), which can catalyze the etching reaction of carbon with H2, CO2, H2O, and/or O2. Such methods can (1) polish the carbon nanotube-containing substrate with a microscopically smooth finish, and/or (2) transfer pre-defined patterns from the hot stamp to the substrate. Such polished or patterned carbon nanotube substrates can find application as carbon nanotube electrodes, field emitters, and field emitter arrays for displays and electron sources.Type: GrantFiled: December 14, 2005Date of Patent: September 8, 2009Assignee: William Marsh Rice UniversityInventors: Yuhuang Wang, Robert H. Hauge, Howard K. Schmidt, Myung Jong Kim, W. Carter Kittrell
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Publication number: 20090133169Abstract: An improved method of loading tips and other surfaces with patterning compositions or inks for use in deposition. A method of patterning is described, the method comprising: (i) providing at least one array of tips; (ii) providing a plurality of patterning compositions; (iii) ink jet printing at least some of the patterning compositions onto some of the tips; and (iv) depositing at least some of the patterning compositions onto a substrate surface; wherein the ink jet printing is adapted to prevent substantial cross-contamination of the patterning composition on the tips. Good printing reproducibility and control of printing rate can be achieved. The surfaces subjected to ink jet printing can be treated to encourage localization of the ink at the tip. The method is particularly important for high density arrays.Type: ApplicationFiled: August 8, 2008Publication date: May 21, 2009Inventors: Chad A. Mirkin, Yuhuang Wang, Louise R. Giam, Matthew Park
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Patent number: 7494639Abstract: The present invention is directed to methods of purifying carbon nanotubes (CNTs). In general, such methods comprise the following steps: (a) preparing an aqueous slurry of impure CNT material; (b) establishing a source of Fe2+ ions in the slurry to provide a catalytic slurry; (c) adding hydrogen peroxide to the catalytic slurry to provide an oxidative slurry, wherein the Fe2+ ions catalyze the production of hydroxyl radicals; and (d) utilizing the hydroxyl radicals in the oxidative slurry to purify the CNT material and provide purified CNTs.Type: GrantFiled: December 28, 2005Date of Patent: February 24, 2009Assignee: William Marsh Rice UniversityInventors: Irene Morin Marek, legal representative, Yuhuang Wang, Robert H. Hauge, Hongwei Shan, Richard E. Smalley
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Publication number: 20080105648Abstract: The present invention is generally directed to catalyzed hot stamp methods for polishing and/or patterning carbon nanotube-containing substrates. In some embodiments, the substrate, as a carbon nanotube fiber end, is brought into contact with a hot stamp (typically at 200-800° C.), and is kept in contact with the hot stamp until the morphology/patterns on the hot stamp have been transferred to the substrate. In some embodiments, the hot stamp is made of material comprising one or more transition metals (Fe, Ni, Co, Pt, Ag, Au, etc.), which can catalyze the etching reaction of carbon with H2, CO2, H2O, and/or O2. Such methods can (1) polish the carbon nanotube-containing substrate with a microscopically smooth finish, and/or (2) transfer pre-defined patterns from the hot stamp to the substrate. Such polished or patterned carbon nanotube substrates can find application as carbon nanotube electrodes, field emitters, and field emitter arrays for displays and electron sources.Type: ApplicationFiled: December 14, 2005Publication date: May 8, 2008Applicant: William Marsh Rice UniversityInventors: Yuhuang Wang, Robert H. Hauge, Howard K. Schmidt, Myung Jong Kim, W. Carter Kittrell
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Publication number: 20080105042Abstract: Massive parallel printing of structures and nanostructures at high speed with high resolution and high quality using two dimensional arrays comprising cantilevers and tip-based transfer of material to a surface. The array is designed so only tips touch the surface. This can be accomplished by long tips and bent cantilevers and alignment. An article comprising: a two-dimensional array of a plurality of cantilevers, wherein the array comprises a plurality of base rows, each base row comprising a plurality of cantilevers, wherein each of the cantilevers comprise tips at the cantilever end away from the base, wherein the number of cantilevers is greater than 250, and wherein the tips have an apex height relative to the cantilever of at least four microns, and a support for the array. Combinatorial arrays and bioarrays can be prepared. The arrays can be manufactured by micromachining methods.Type: ApplicationFiled: March 23, 2007Publication date: May 8, 2008Inventors: Chad A. Mirkin, Khalid Salaita, Yuhuang Wang, Joseph S. Fragala, Raymond R. Shile
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Publication number: 20070154714Abstract: Methods and articles providing for precise aligning, positioning, shaping, and linking of nanotubes and carbon nanotubes. An article comprising: a solid surface comprising at least two different surface regions including: a first surface region which comprises an outer boundary and which is adapted for carbon nanotube adsorption, and a second surface region which is adapted for preventing carbon nanotube adsorption, the second region forming an interface with the outer boundary of the first region, at least one carbon nanotube which is at least partially selectively adsorbed at the interface. The shape and size of the patterns on the surface and the length of the carbon nanotube can be controlled to provide for selective interfacial adsorption.Type: ApplicationFiled: December 4, 2006Publication date: July 5, 2007Inventors: Chad Mirkin, Yuhuang Wang, Daniel Maspoch
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Publication number: 20070065975Abstract: The present invention is directed to methods of purifying carbon nanotubes (CNTs). In general, such methods comprise the following steps: (a) preparing an aqueous slurry of impure CNT material; (b) establishing a source of Fe2+ ions in the slurry to provide a catalytic slurry; (c) adding hydrogen peroxide to the catalytic slurry to provide an oxidative slurry, wherein the Fe2+ ions catalyze the production of hydroxyl radicals; and (d) utilizing the hydroxyl radicals in the oxidative slurry to purify the CNT material and provide purified CNTs.Type: ApplicationFiled: December 28, 2005Publication date: March 22, 2007Applicant: William Marsh Rice UniversityInventors: Richard Smalley, Irene Marek, Yuhuang Wang, Robert Hauge, Hongwei Shan
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Publication number: 20070009421Abstract: The present invention is directed to fibers of epitaxially grown single-wall carbon nanotubes (SWNTs) and methods of making same. Such methods generally comprise the steps of: (a) providing a spun SWNT fiber; (b) cutting the fiber substantially perpendicular to the fiber axis to yield a cut fiber; (c) etching the cut fiber at its end with a plasma to yield an etched cut fiber; (d) depositing metal catalyst on the etched cut fiber end to form a continuous SWNT fiber precursor; and (e) introducing feedstock gases under SWNT growth conditions to grow the continuous SWNT fiber precursor into a continuous SWNT fiber.Type: ApplicationFiled: December 1, 2005Publication date: January 11, 2007Applicant: William Marsh Rice UniversityInventors: W. Kittrell, Yuhuang Wang, Myung Kim, Robert Hauge, Richard Smalley, Irene Marek