Abstract: A biological sensor that is to be affixed to a living body and is for acquiring a biological signal includes a cover member; and a porous substrate having a porous structure, the porous substrate being disposed on the cover member on a side of the living body. A sticking layer, including the porous substrate and a first adhesive layer that is disposed on the porous substrate on a side of the living body, exhibits a shear stress of from 5×104 N/m2 to 65×104 N/m2 when the sticking layer is deformed in a direction perpendicular to a thickness direction of the sticking layer by 5% to 15% of a length of the sticking layer. A moisture permeability of the sticking layer is within a range from 65 g/m2·day to 4000 g/m2·day.

Abstract: A biological sensor includes a sensor body for acquiring biological information; an electrode connected to the sensor body; a first layer member configured to store the sensor body, a first adhesive layer being disposed on one surface of the first layer member facing the electrode; and a second layer member being stuck onto the one surface of the first layer member, and having a shape for covering the sensor body and exposing the electrode, a second adhesive layer being disposed on a surface of the second layer member opposite to the first layer member. A sticking surface onto a living body is formed by the first layer member and the second layer member.

Abstract: The present invention provides a sensor cell that has excellent measurement accuracy in repetitive measurement. An optical waveguide of the present invention includes a cladding layer and a core layer buried in the cladding layer so that at least one surface of the core layer is exposed. A water contact angle of a surface of the cladding layer on which the core layer is exposed is 80° or more. An SPR sensor cell and a colorimetric sensor cell of the present invention each include the optical waveguide of the present invention.

Abstract: The present invention provides a sensor cell that has excellent measurement accuracy in repetitive measurement. An optical waveguide of the present invention includes a cladding layer and a core layer buried in the cladding layer so that at least one surface of the core layer is exposed. A water contact angle of a surface of the cladding layer on which the core layer is exposed is 80° or more. An SPR sensor cell and a colorimetric sensor cell of the present invention each include the optical waveguide of the present invention.

Abstract: A battery separator (13) of the present invention includes a porous film (12) serving as a substrate and a crosslinked polymer layer (11) supported on the porous film (12). The crosslinked polymer layer (11) contains a crosslinked polymer and inorganic particles, and is non-porous. The crosslinked polymer is obtained by reacting a reactive polymer having a functional group in its molecule with a polyfunctional compound reactive with the functional group so as to crosslink at least a part of the reactive polymer. A lithium ion secondary battery of the present invention includes a positive electrode (14), a negative electrode (15), the battery separator (13) of the present invention disposed between the positive electrode (14) and the negative electrode (15), and a non-aqueous electrolyte solution. The battery separator (13) is disposed so that the porous film (12) faces the negative electrode (15) and the crosslinked polymer layer (11) faces the positive electrode (14).

Abstract: A battery separator (13) of the present invention includes a porous film (12) serving as a substrate and a crosslinked polymer layer (11) supported on the porous film (12). The crosslinked polymer layer (11) contains a crosslinked polymer and inorganic particles, and is non-porous. The crosslinked polymer is obtained by reacting a reactive polymer having a functional group in its molecule with a polyfunctional compound reactive with the functional group so as to crosslink at least a part of the reactive polymer. A lithium ion secondary battery of the present invention includes a positive electrode (14), a negative electrode (15), the battery separator (13) of the present invention disposed between the positive electrode (14) and the negative electrode (15), and a non-aqueous electrolyte solution. The battery separator (13) is disposed so that the porous film (12) faces the negative electrode (15) and the crosslinked polymer layer (11) faces the positive electrode (14).

Abstract: The present invention relates to a cell culture substrate in which a polymer chain having a hydrophilic skeleton is grafted onto a surface of polystyrene or poly(?-caprolactone) having a water contact angle of from 75° to 100°. This cell culture substrate has excellent efficiency of cell culture without the necessity of immobilization and adsorption of a cell adhesion substance on a surface of a substrate.