| 摘要 |
An optical chemical sensor comprising: an optical fibre having a core and a cladding layer (3) and a recess (4) in the cladding layer (3) containing chemically responsive material; the recess (4) being arranged so that at least part of the chemically responsive material interacts with the evanescent field of light passing along the optical fibre; the chemically responsive material having a bulk refractive index close to a refractive index of the core and comprising a polymer matrix loaded with chemically responsive particles, such that the chemically responsive particles respond to the presence of a particular chemical by changing the optical properties of the chemically responsive material. The chemically responsive material may be a nanoparticle of titanium oxide, palladium, platinum or rhodium embedded in a polymer matrix such as an interpenetrating polymer network (IPN). |
