Tannic acid-coated gold nanorod as a spectrometric probe for sensitive and selective detection of Al3+ in aqueous system

다국어 초록 (Multilingual Abstract)

This work introduces an efficient probe for sensitive and selective detection of Al3+ based on goldnanorods (AuNRs) with tannic acid (TA) surface modification. TA, which containsfive digalloyl estergroups covalently attached to a glucose core, exhibits preferential complexation and binding to Al3+,leading to the formation of side-by-side assembly of AuNRs and consequently inducing a change in theUV–vis absorbance spectra of their aqueous suspension. By increasing the Al3+ concentration to 7.4 mM, arapid, linear blue-shift in the longitudinal LSPR band and a decrease in its intensity are exhibited, with a0.09 mM limit of detection (LOD). Furthermore, the probe shows good selectivity to Al3+, along with thecapability of detecting this cation in real water samples.

참고문헌 (Reference)

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