METHOD FOR FORMING FILM, BASE PLATE WITH FILM, SENSOR, AND LIQUID COMPOSITION

Abstract

A method for forming a film comprises: preparing a liquid composition containing a substance for detecting an object and a polyether derivative having a weight-average molecular weight of 2000 or less; supplying the liquid composition to a side adjacent to a first surface of a base plate by using a droplet discharge method to form a liquid film; and drying the liquid film to form a detection film containing the substance.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements.

FIG. 1 is a longitudinal cross-sectional view schematically illustrating the structure of a sensor of an embodiment of the invention.

FIG. 2 is a schematic view illustrating a method for manufacturing the sensor shown in FIG. 1.

Claims

1. A method for forming a film, comprising: preparing a liquid composition containing a substance for detecting an object and a polyether derivative having a weight-average molecular weight of 2000 or less;supplying the liquid composition to a side adjacent to a surface of a base plate by using a droplet discharge method to form a liquid film; anddrying the liquid film to form a detection film containing the substance.

2. The method for forming a film according to claim 1, wherein A divided by B is from 9 to 105 where a content of the polyether derivative in the liquid composition is A wt % while a content of the substance in the liquid is B wt %.

3. The method for forming a film according to claim 1, wherein the liquid composition includes 10 wt % or less of the substance.

4. The method for forming a film according to claim 1, wherein the liquid composition includes 90 wt % or more of the polyether derivative.

5. The method for forming a film according to claim 1, wherein viscosity of the liquid composition is 20 cP or less at normal temperature.

6. The method for forming a film according to claim 1, wherein surface tension of the liquid composition is from 20 mN/m to 70 mN/m at normal temperature.

7. The method for forming a film according to claim 1, wherein a variation of the polyether derivative is within a range of ±0.2 C where C is a weight-average molecular weight of the polyether derivative.

8. The method for forming a film according to claim 1, wherein the polyether derivative includes a main chain made of polyether and a functional group that is provided at least one end of the main chain and bonds the substance.

9. The method for forming a film according to claim 8, wherein the main chain has the functional group at both ends thereof.

10. The method for forming a film according to claim 8, wherein the polyether derivative and the substance are joined by bonding the substance and the functional group in preparing the liquid composition.

11. The method for forming a film according to claim 1, wherein the polyether derivative mainly contains a polyethylene glycol derivative.

12. The method for forming a film according to claim 1, wherein the detection substance is protein.

13. The method for forming a film according to claim 12, wherein the protein is an enzyme.

14. A base plate with a film, comprising a detection film formed at the side adjacent to the surface of the base plate by the method for forming a film according to claim 1.

15. A base plate with a film, comprising a detection film containing a substance for detecting an object, wherein the detection film includes the substance and a polyether derivative having a weight-average molecular weight of 2000 or less.

16. A sensor, comprising the base plate with the film according to claim 14.

17. A liquid composition, comprising: a substance having a physiological activity; anda polyether derivative having a weight-average molecular weight of 2000 or less.