In situ μ-printed optical fiber-tip CO2 sensor using a photocrosslinkable poly(ionic liquid)
Abstract Carbon dioxide (CO 2 ) sensors play important roles in our daily life and production activities. However, it remains a challenge to develop a tiny device with remote sensing capability for detection of CO 2 concentration and related parameters. Here we present a new optical fiber-tip CO 2 sensor for simultaneous measurement of CO 2 concentration and temperature. A photocrosslinkable poly(ionic liquid), i.e. poly(1-allyl-3-vinylimidazolium bromide) (PAVB), with selective CO 2 adsorption capability was synthesized to fabricate miniature sensors via an in situ optical μ-printing technology. We directly printed several micrometer-scale Fabry–PErot interferometers (FPIs) on the end face of a multicore optical fiber using the PAVB and SU-8 epoxy, respectively. We have demonstrated that the PAVB FPI sensor can measure CO 2 concentration with a sensitivity up to ∼35 pm/% in a wide range of 0%–75%, and its rise and fall dynamic response times are about 6.1 and 8.0 min, respectively. Meanwhile, the SU-8 FPI sensor is able to measure temperature with a sensitivity 0.059 nm/°C. Such a tiny CO 2 sensor can remotely and simultaneously measure CO 2 concentration and temperature in very small spaces and is thus promising for many applications ranging from waste gas detection to food quality control. Highlights A photocrosslinkable poly(ionic liquid), i.e. poly(1-allyl-3-vinylimidazolium bromide) (PAVB), with a large number of imidazolium functional groups has been synthesized for reversible adsorption of CO 2 gas. An in situ optical μ-printing technology has been established to directly print microscale polymer Fabry–PErot interferometers (FPIs) on the small end faces of optical fibers. Two kinds of microscale FPIs using the PAVB and SU-8 epoxy have been fabricated on the end face of a multicore optical fiber for simultaneous measurement of CO 2 concentration and temperature, respectively. In addition to the excellent sensing performances (e.g. good selectivity, high sensitivity, and extremely wide dynamic operation range), the novel optical fiber-tip sensor has unique capabilities to remotely measure CO 2 concentration and temperature in very small spaces.
유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.
원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기