Method of using an absorptive sensor element

Patent metadata

Field	Value
Publication number	US-9279792-B2
Application number	US-201214007106-A
Country	US
Kind code	B2
Filing date	Mar 27, 2012
Priority date	Apr 13, 2011
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

A method of using an absorptive sensor element includes: providing the absorptive sensor element, heating the absorptive sensor element to a temperature in a range of from 30° C. to 100° C., exposing the absorptive sensor element to an analyte vapor, and measuring a capacitance-related property of the absorptive sensor element and/or a spectral feature upon reflection of incident light. The absorptive sensor element comprises: a substrate, a first member disposed on the substrate, a second member, and a detection layer comprising a polymer of intrinsic microporosity disposed between and contacting the first member and the second member.

First claim

What is claimed is:

1. A method of using an absorptive sensor element, the method comprising the steps:
a) providing the absorptive sensor element, wherein the absorptive sensor element comprises: a first member, a second member, and a detection layer comprising a polymer of intrinsic microporosity disposed between and contacting the first member and the second member;
b) heating the absorptive sensor element to an elevated temperature in a range of from 30° C. to 100° C.;
while the absorptive sensor element is at the elevated temperature, performing step c) and d):
c) exposing the absorptive sensor element to an analyte vapor; and
d) measuring at least one of:
i) a capacitance-related property of the absorptive sensor element, wherein the first member and the second member are conductive, and wherein the detection layer is dielectric;
ii) at least one spectral feature of reflected light, wherein the first member is reflective, the second member is semi-reflective, and the detection layer is optically transmissive, wherein a portion of the reflected light is reflected by the first member and wherein a portion of the reflected light is reflected by the second member; or
iii) both i) and ii).

2. A method according to claim 1 , wherein the first member is supported on a substrate.

3. A method according to claim 1 , wherein the second member is supported on a substrate.

4. A method according to claim 1 , wherein step d) comprises i).

5. A method according to claim 1 , wherein step d) comprises ii).

6. A method according to claim 1 , wherein the elevated temperature is in a range of from 40° C. to 80° C.

7. A method according to claim 1 , wherein the elevated temperature is in a range of from 50° C. to 65° C.

8. A method according to claim 1 , wherein step d) comprises measuring iii).

Assignees

• Palazzotto Michael C
• Gryska Stefan H
• Kang Myungchan
• Wendland Michael S
• 3M Innovative Properties Co

Inventors

• Palazzotto Michael C
• Gryska Stefan H
• Kang Myungchan
• Wendland Michael S

Classifications

• G01N33/0047

  Organic compounds · CPC title

• G01N27/227

  Sensors changing capacitance upon adsorption or absorption of fluid components, e.g. electrolyte-insulator-semiconductor sensors, MOS capacitors (G01N27/225 takes precedence) · CPC title

• G01N21/783 Primary

  for analysing gases · CPC title

• G01N27/22

  by investigating capacitance · CPC title

• G01N21/55

  Specular reflectivity · CPC title