AI Article Synopsis
- A cellulose nanofibril film is enhanced by attaching boronate-terminated conjugated polymer chains at C-6 carboxyl groups, creating a specialized fluorescent sensor for detecting nitroaromatic vapors.
- The modification results in a high fraction of accessible cavities in the film, which facilitates the penetration and diffusion of vapor, leading to improved sensitivity and rapid response to the analyte.
- The new sensor demonstrates a fluorescence quenching efficiency three times greater than traditional methods after exposure to DNT vapor for 600 seconds, along with good reversibility.
Article Abstract
A cellulose nanofibril film is modified by chemical assembly of boronate-terminated conjugated polymer chains at its specific sites, C-6 carboxyl groups. The modified cellulose nanofibril film is used as a fluorescent sensor for nitroaromatic vapor. Thanks to the specific reactive sites, numerous loose cavities or pathways located in the film sensor's out-layer have been formed, and the fraction of easily accessible cavities of the novel fluorescent film sensor is up to 0.97, which could benefit the penetration and diffusion of analyte vapor. Therefore, the novel fluorescent film sensor exhibits high sensitivity toward nitroaromatic vapor with a fast response. The fluorescence quenching efficiency of the chemical-assembly film sensor is about 3 times larger than that of the spin-cast film sensor using the same conjugated polymer for 600 s exposure to DNT vapor. In addition, the novel fluorescent film sensor shows good reversibility.
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| http://dx.doi.org/10.1016/j.carbpol.2014.03.042 | DOI Listing |
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