Abstract: An electro-conductive hydrogel composite material that may be suitable as an artificial skin satisfies all four requirements of artificial skin, namely, flexibility, electrical conductivity, healing property, and biocompatibility. The electro-conductive hydrogel composite material includes a hydrogel composition including water and a cross-linkable polymer which reversibly forms cross-linkage by hydrogen bonding; and an electro-conductive material dispersed in the hydrogen bond-based hydrogel.

Abstract: Provided is a hydrogen peroxide sensitive metal nanoparticle including: a metal nanoparticle including a biocompatible metal and a hydrogen peroxide reactive ion which is bonded to a surface of the metal nanoparticle and is oxidized by hydrogen peroxide.

Abstract: Provided are a conductive layered structure including a DNA hydrogel and a composite layer disposed on the DNA hydrogel. The composite layer may include a polymer electrolyte and a conductive material. Also provided are an electrode and a supercapacitor, each including the conductive layered structure. Further provided is a method of manufacturing the conductive layered structure. Thus, a biocompatible, implantable electrode having a large specific surface area and a high conductivity may be manufactured through simple processes.

Abstract: Provided is an example method of preparing a porous metal oxide structure, the method including adsorbing a metal oxide precursor onto a template having a networked structure of branched polynucleotides, decomposing and converting the adsorbed metal oxide precursor into a metal oxide, and removing the template. The networked structure of branched polynucleotides may be used as a template so as to facilitate control of the pore structure of a porous metal oxide structure.

Abstract: Provided is a method of preparing a porous metal material. The method includes: obtaining a composite of a DNA hydrogel and a metal precursor by mixing the DNA hydrogel and the metal precursor; and reducing the composite of the DNA hydrogel and the metal precursor.

Abstract: Provided is an example method of preparing a porous metal oxide structure, the method including adsorbing a metal oxide precursor onto a template having a networked structure of branched polynucleotides, decomposing and converting the adsorbed metal oxide precursor into a metal oxide, and removing the template. The networked structure of branched polynucleotides may be used as a template so as to facilitate control of the pore structure of a porous metal oxide structure.

Abstract: An electro-conductive hydrogel composite material that may be suitable as an artificial skin satisfies all four requirements of artificial skin, namely, flexibility, electrical conductivity, healing property, and biocompatibility. The electro-conductive hydrogel composite material includes a hydrogel composition including water and a cross-linkable polymer which reversibly forms cross-linkage by hydrogen bonding; and an electro-conductive material dispersed in the hydrogen bond-based hydrogel.

Abstract: Provided are a nanoparticle assembly including a DNA hydrogel and gold nanoparticles, methods of preparing thereof, and an active material delivering composite including the same. The nanoparticle assembly has an excellent biocompatibility, an ability to prevent an accumulation of the nanoparticle assembly in a body, and is capable of being used to provide physical and chemical treatment.

Abstract: Provided is a method of preparing a porous metal material. The method includes: obtaining a composite of a DNA hydrogel and a metal precursor by mixing the DNA hydrogel and the metal precursor; and reducing the composite of the DNA hydrogel and the metal precursor.

Abstract: An odor compound release device includes a support that is deformed when an external stimulus is applied, and when the external stimulus is not applied, restored to its original state. A plurality of spaces are located in the support, have upper portions closed by the support, and are to be filled with odor compounds, wherein the upper portions are opened or closed by deformation or restoration of the support due to the application of the external stimulus. A member that is located in the support or on a surface of the support and applies the external stimulus to the support.

Abstract: Provided is a hydrogen peroxide sensitive metal nanoparticle including: a metal nanoparticle including a biocompatible metal and a hydrogen peroxide reactive ion which is bonded to a surface of the metal nanoparticle and is oxidized by hydrogen peroxide.

Abstract: Provided are a conductive layered structure including a DNA hydrogel and a composite layer disposed on the DNA hydrogel. The composite layer may include a polymer electrolyte and a conductive material. Also provided are an electrode and a supercapacitor, each including the conductive layered structure. Further provided is a method of manufacturing the conductive layered structure. Thus, a biocompatible, implantable electrode having a large specific surface area and a high conductivity may be manufactured through simple processes.

Abstract: Kits for detecting a target material and methods of detecting a target material by using the kits are provided, the kits include a target material binding portion including a first molecule and a probe linked to the first molecule, and a target material detection portion including a plurality of nanoparticles each having a surface to which a compound having a zwitterion and a second molecule are linked. The first molecule is specifically bound to the second molecule in a pair.

Abstract: A method of forming a stretchable conductive pattern includes forming a base substrate; forming a plurality of non-linear trench lines that include peaks and valleys arranged at constant intervals in the base substrate; forming a polymer-metal precursor mixture pattern by filling the trench lines with a mixture of the polymer-metal precursor; converting the polymer-metal precursor mixture of the polymer-metal precursor mixture pattern into a polymer gel/metal nano-particle complex to form a polymer gel/metal nano-particle complex pattern; and primarily transferring the polymer gel/metal nano-particle complex pattern in the base substrate onto an acceptor base substrate.

Abstract: Example embodiments relate to stretchable conductive nanofibers including at least one stretchable nanofiber and a conductive layer on a structure of the stretchable nanofiber. The conductive layer may include carbon nanotubes and metal nanoparticles on the surface of the stretchable nanofiber. The carbon nanotubes and metal nanoparticles may form a percolation network. The stretchable nanofiber includes stretchable polymers.

Abstract: A method of forming an organic thin film may include providing a substrate; providing an organic solution including an organic solute and a solvent having a boiling point of about 85° C. or less; dipping the substrate into the organic solution; removing the substrate from the organic solution; and/or precipitating the organic solute on the substrate to provide an organic thin film, wherein the removing the substrate from the organic solution is performed at a speed of about 10 to about 300 ?m/s from one end of the substrate to the other end of the substrate. Accordingly, an organic thin film having advantageous characteristics and a wide area may be obtained.

Abstract: An odor compound release device includes a support that is deformed when an external stimulus is applied, and when the external stimulus is not applied, restored to its original state. A plurality of spaces are located in the support, have upper portions closed by the support, and are to be filled with odor compounds, wherein the upper portions are opened or closed by deformation or restoration of the support due to the application of the external stimulus. A member that is located in the support or on a surface of the support and applies the external stimulus to the support.