Abstract
A new fiber-optic pH sensor based on a thin-core fiber modal interferometer (TCFMI) with electrostatic self-assembled nanocoating is presented in this paper. By using layer-by-layer (LBL) electrostatic self-assembly technique, polydiallyldimethylammonium chloride (PDDA) and poly(acrylic acid) (PAA) are deposited on the side surface of TCFMI for pH sensing. Quartz crystal microbalance (QCM) is employed to monitor the thickness growth, and the morphology of the nanocoating is characterized by using atomic force microscopy (AFM). A linear, fast, and monotonic response of the sensor in both acidic and alkaline solutions (pH range: 2~10) with resolution of 0.0082 pH unit was experimentally demonstrated. OCIS codes: 060.2310, 060.2370, 060.2340.
Original language | English |
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Title of host publication | IMEKO TC2 Symposium on Photonics in Measurements 2010 |
Pages | 30-39 |
Number of pages | 10 |
Publication status | Published - 1 Dec 2010 |
Externally published | Yes |
Event | IMEKO TC2 Symposium on Photonics in Measurements 2010 - Hangzhou, China Duration: 13 Sept 2010 → 14 Sept 2010 |
Conference
Conference | IMEKO TC2 Symposium on Photonics in Measurements 2010 |
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Country/Territory | China |
City | Hangzhou |
Period | 13/09/10 → 14/09/10 |
Keywords
- Electrostatic self-assembly
- Fiber modal interferometer
- Fiber-optic pH sensor
ASJC Scopus subject areas
- Electrical and Electronic Engineering