Patents by Inventor Hongwei Duan

Hongwei Duan 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).

  • Publication number: 20190366733
    Abstract: According to the present disclosure, an isotropic structural colour printing process is provided. The process comprising (a) providing an ink composition comprising ink particles (such as polymeric particles (e.g. polystyrene), metal-organic frameworks (MOFs) (e.g. ZIF-8)) in a liquid reagent; and (b) depositing the ink composition onto a surface of a substrate (e.g. anodic aluminium oxide membrane, photo papers). Due to capillary action and/or absorption of the liquid reagent, the ink particles form an amorphous arrangement of structures that lead to isotropic structural colour. In the preferred embodiment, the ink particles may further be coated with a catechol group (such as polydopamine). An apparatus for detecting a target substance in the gaseous phase, wherein the apparatus comprises a nanostructure capable of exhibiting a change in isotropic structural colour when one or more molecules of the target substance are entrapped as an indication that the target substance is present, is also provided.
    Type: Application
    Filed: December 21, 2017
    Publication date: December 5, 2019
    Inventors: Hongwei DUAN, Ling BAI
  • Publication number: 20190079014
    Abstract: A core-shell plasmonic nanogapped nanostructured material is provided. The core-shell nanogapped nanostructured material has a core and at least one shell surrounding the core, wherein the at least one shell comprises a first layer comprising a polymer having a catechol group, wherein the first layer defines the nanogap in the core-shell plasmonic nanostructured material, and a second layer comprises a metal disposed on the first layer. A method of preparing the core-shell plasmonic nanogap nanostructured material, and use of the core-shell plasmonic nanogap nanostructured material are also provided. As an embodiment, a polydopamine covalently bonded to a Raman probe or a fluorescent probe is used to prepare the first layer of the shell in said core-shell plasmonic nanogap nanostructured material, thereafter a gold shell is deposited onto the polydopamine to form a second layer of the shell.
    Type: Application
    Filed: March 24, 2017
    Publication date: March 14, 2019
    Inventors: Hongwei Duan, Jiajing Zhou
  • Publication number: 20170304796
    Abstract: A method for preparing a magnetic chain structure is provided. The method comprises providing a plurality of magnetic particles; dispersing the plurality of magnetic particles in a solution comprising a dopamine-based material to form a reaction mixture; applying a magnetic field across the reaction mixture to align the magnetic particles in the reaction mixture; and polymerizing the dopamine-based material on the aligned magnetic particles to obtain the magnetic chain structure. A magnetic chain structure prepared by the method is also provided.
    Type: Application
    Filed: November 25, 2015
    Publication date: October 26, 2017
    Inventors: Hongwei Duan, Jiajing Zhou, Yee Cheong Lam, Chun Yee Lim, Qirong Xiong
  • Publication number: 20170204540
    Abstract: A highly absorbent, super-soft composite yarn includes a core formed of microfibers and a covering layer formed of natural fibers which are twisted and surround the microfibers. The microfiber is a composite fiber having two or more components. In one structure, the two components are held together in an interleaved structure resembling an orange in cross-section. In another structure, the microfibers have undergone a splitting process and the two components are separated from each other, where the single filaments of the two components have a linear mass density below 0.55 dtex. The natural fibers of the covering layer cotton fibers, hemp fibers, wool fibers, bamboo fibers, silk fibers, or soybean fibers. The microfibers are functionalized with one or more additives, such as antibacterial, aromatic, and UV-blocking additives. A method for manufacturing the composite yarn and related textile is also described.
    Type: Application
    Filed: March 29, 2016
    Publication date: July 20, 2017
    Inventor: Hongwei DUAN
  • Patent number: 8578972
    Abstract: A fabric having a ground fabric, and a double layer terry or a double layer pile on either or both surfaces of the ground fabric, or a double layer terry on one surface and a double layer pile on the other surface. The double layer terry has an outer terry and an inner terry lower than the outer terry; the double layer pile has an outer pile and an inner pile lower than the outer pile. The outer terry or outer pile is a natural fiber, and the lower terry or lower pile is a microfiber. Methods of manufacturing the fabric are also disclosed.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: November 12, 2013
    Inventor: Hongwei Duan
  • Publication number: 20120255643
    Abstract: A fabric having a ground fabric, and a double layer terry or a double layer pile on either or both surfaces of the ground fabric, or a double layer terry on one surface and a double layer pile on the other surface. The double layer terry has an outer terry and an inner terry lower than the outer terry; the double layer pile has an outer pile and an inner pile lower than the outer pile. The outer terry or outer pile is a natural fiber, and the lower terry or lower pile is a microfiber. Methods of manufacturing the fabric are also disclosed.
    Type: Application
    Filed: March 21, 2012
    Publication date: October 11, 2012
    Inventor: Hongwei Duan
  • Publication number: 20110060036
    Abstract: Disclosed herein are compounds and compositions including a polyglycerol nanocarrier, a therapeutic agent or imaging agent, and optionally a targeting agent. In certain aspects the disclosed compounds include biocompatible hyperbranched polymer nanocarriers. Such compounds and compositions are useful for the targeted delivery of antitumor agents and imaging agents to tumors in vivo. Methods are also disclosed for detecting and treating such tumors.
    Type: Application
    Filed: September 23, 2010
    Publication date: March 10, 2011
    Applicant: EMORY UNIVERSITY
    Inventors: Shuming Nie, Hongwei Duan, Min Kuang