Abstract: The present disclosure provides an etching mask, a method for manufacturing the same, a method for manufacturing a porous membrane using the same, a porous membrane, a fine dust blocking mask including the same, and a method for manufacturing a surface enhanced Raman scattering active substrate. In this connection, the etching mask includes an organic film; and a pattern layer disposed on the organic film, wherein the pattern layer has openings defined therein having a uniform size, wherein each of the openings includes a micro-scale or nano-scale hole.

Abstract: In one aspect of the present disclosure, there is provided an electrolyte solution for a thermoelectric device, the solution comprising: a redox couple; water; and a polar organic solvent.

Abstract: There is provided a flow-resistance reducing laminate comprising: a substrate; and a flow-resistance reducing layer formed on the substrate, wherein the flow-resistance reducing layer has a surface portion facing a liquid, wherein a flow interface is formed between the liquid and the laminate upon relative movement between the liquid and the laminate, wherein the flow-resistance reducing layer is configured such that an air layer defines the flow interface.

Abstract: The present disclosure provides a method for producing an ionic liquid, the method comprising: reacting a nitrogen-containing heterocyclic compound or an amine-based compound with an ammonium salt along with trialkyl orthoformate to acquire an alkylated nitrogen-containing heterocyclic compound or an alkylated nitrogen-containing amine-based compound, wherein the alkylated nitrogen-containing heterocyclic compound or the alkylated nitrogen-containing amine-based compound as a cation of the ionic liquid is ionically bonded to an anion included in the ammonium salt to form the ionic liquid.