Colorimetric detection of fluoride ion in an aqueous solution using a thioglucose-capped gold nanoparticle

Incorporation of the fluoride induced SiO bond cleavage and functionalized gold nanoparticle aggregation into one colorimetric probe for highly specific and sensitive detection of fluoride

“…However, studies on colorimetric anion recognition and sensing anions by AuNPs are limited [31][32][33][34][35][36]. Up to now, the thioglucose modified AuNPs had been developed for colorimetric detection of F − based on interparticle crosslink induced aggregation [37]. However, several issues in this method still have room to improve in term of the complication and over-consumption for thioglucose synthesis, besides its sensing relied on hydrogen-bond alone is susceptible to interference.…”

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“…Usually, the delay time depends on the size or molecular weight of this part. 【Conjugation】represents conjugating atoms or molecules such as thiol type -S- [4] or amid coupling -NHCO-type [8].…”

A colorimetric probe based on desensitized ionene-stabilized gold nanoparticles for single-step test for sulfate ions

“…Lots of colorimetric techniques based on AuNPs for the determination of different organic compounds [10][11][12][13][14][15][16][17][18], metal ions [19][20][21][22][23][24][25][26][27][28], and other analytes have been suggested for the past ten years. The AuNPs-based colorimetric platform has also found an application for sensing anions, including dihydrophosphate [29,30], hydrophosphate [31], fluoride [32,33], cyanide [34], nitrite [35], sulfide [36], and hypochlorite [37]. AuNPs have been only once reported as a colorimetric probe for the detection of sulfate [38].…”