LAUSR

Abstract Metal chelation-enhanced changes in surface plasmon resonance (SPR) band of gallic acid-functionalized AgNP solution to monitor aluminum ions (Al3+) is reported herein. In aqueous solution, Al3+ selectively induced a strong absorbance with large shifts up to ∼125 nm from the SPR band with color changing from orange to red. This study illustrates that hydroxyl groups of phenol affect the response of a probe that tunes the absorbance maxima to a longer wavelength at 525 nm. Moreover, the rapid formation of a AgNP-Al3+ coordination complex was demonstrated by real-time monitoring, adsorptive removal, and energy dispersive spectroscopy mapping.