Fluorescence turn-on detection of iodide, iodate and total iodine using fluorescein-5-isothiocyanate-modified gold nanoparticles

The Analyst ◽  
2009 ◽  
Vol 134 (10) ◽  
pp. 2106 ◽  
Author(s):  
Yi-Ming Chen ◽  
Tian-Lu Cheng ◽  
Wei-Lung Tseng
Keyword(s):  
Gold Nanoparticles ◽  
Total Iodine ◽  
Turn On ◽  
Fluorescence Turn On

Improved Detection of Hg2+ in Aqueous Solution with High Sensitivity and Selectivity by Using Mercury-Specific DNA, Sybr Green I and Gold Nanoparticles

2011 ◽  
Vol 239-242 ◽  
pp. 934-939
Author(s):  
Hui Xu ◽  
Shuli Gao ◽  
Jian Nong Chen ◽  
Quan Wen Liu
Keyword(s):  
Gold Nanoparticles ◽  
High Sensitivity ◽  
Sybr Green ◽  
Sybr Green I ◽  
Fluorescence Signal ◽  
Potassium Ions ◽  
Label Free ◽  
Turn On ◽  
Sensitivity And Selectivity ◽  
Fluorescence Turn On

We report a label-free, fast, fluorescence turn on assay for Hg2+detecton by using mercury-specific DNA (MSD), Sybr Green I (SG) and gold nanoparticles (AuNPs). SG efficiently discriminates MSD and MSD/Hg2+complex. The addition of gold nanoparticle decreases the background fluorescence signal further for MSD. The fluorescence intensity of MSD/Hg2+complex keeps constant after addition of AuNPs. This property improves the signal-to-background ratio and decreases the detection limitation further. In addition, the method shows improved selectivity compared with that in the absence of AuNPs. This strategy could be applied to the detection of potassium ions and showed good generality.

Coordinatively Self-Assembled Luminescent Gold Nanoparticles: Fluorescence Turn-On System for High-Efficiency Passive Tumor Imaging

2017 ◽  
Vol 9 (6) ◽  
pp. 5118-5127 ◽  
Author(s):  
Xuandi Lai ◽  
Lishan Tan ◽  
Xiulong Deng ◽  
Jinbin Liu ◽  
Aiqing Li ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
High Efficiency ◽  
Tumor Imaging ◽  
Turn On ◽  
Self Assembled ◽  
Fluorescence Turn On

Colorimetric and fluorescence “turn-on” methods for the sensitive detection of bromelain using carbon dots functionalized gold nanoparticles as a dual probe

RSC Advances ◽  
2016 ◽  
Vol 6 (38) ◽  
pp. 32025-32036 ◽  
Author(s):  
Karuna A. Rawat ◽  
Rakesh Kumar Singhal ◽  
Suresh Kumar Kailasa
Keyword(s):  
Gold Nanoparticles ◽  
Fluorescence Spectroscopy ◽  
Fluorescence Detection ◽  
Carbon Dots ◽  
Limit Of Detection ◽  
Functionalized Gold Nanoparticles ◽  
Turn On ◽  
Uv Visible ◽  
Fluorescence Turn On ◽  
Dual Probe

Carbon dots were functionalized on the surfaces of gold nanoparticles for the colorimetric and fluorescence detection of bromelain. The limit of detection for bromelain was 18.9 nM and 0.52 nM using UV-visible and fluorescence spectroscopy, respectively.

Fluorescence turn-on detection of mercury ions based on the controlled adsorption of a perylene probe onto the gold nanoparticles

The Analyst ◽  
2016 ◽  
Vol 141 (1) ◽  
pp. 346-351 ◽  
Author(s):  
Juanmin Li ◽  
Jian Chen ◽  
Yang Chen ◽  
Yongxin Li ◽  
Sohail Anjum Shahzad ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Au Nanoparticles ◽  
Mercury Ions ◽  
Turn On ◽  
Controlled Adsorption ◽  
Fluorescence Turn On

A novel fluorescence turn-on strategy based on Au nanoparticles and a perylene probe for the sensing of Hg2+ ions has been developed.

A Boronic Acid-Based Fluorescence Hydrogel for Monosaccharide Detection

2018 ◽  
Author(s):  
Suying Xu ◽  
Adam Sedgwick ◽  
Souad Elfecky ◽  
Wenbo Chen ◽  
Ashley Jones ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Boronic Acid ◽  
Binding Constants ◽  
Strong Fluorescence ◽  
Fluorescence Response ◽  
Turn On ◽  
Fluorescence Turn On ◽  
Hydrogel System

<p>A boronic acid-based anthracene fluorescent probe was functionalised with an acrylamide unit to incorporate into a hydrogel system for monosaccharide detection<i>. </i>In solution, the fluorescent probe<b> </b>displayed a strong fluorescence turn-on response upon exposure to fructose, and an expected trend in apparent binding constants, as judged by a fluorescence response where D-fructose > D-galactose > D-mannose > D-glucose. The hydrogel incorporating the boronic acid monomer demonstrated the ability to detect monosaccharides by fluorescence with the same overall trend as the monomer in solution with the addition of fructose resulting in a 10-fold enhancement (≤ 0.25 M). <b><u></u></b></p>

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