Metal-induced aggregation of mononucleotides-stabilized gold nanoparticles: an efficient approach for simple and rapid colorimetric detection of Hg(ii)

2011 ◽  
Vol 47 (21) ◽  
pp. 6039 ◽  
Author(s):  
Yunyao Xu ◽  
Li Deng ◽  
Hao Wang ◽  
Xiangyuan Ouyang ◽  
Jing Zheng ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Efficient Approach ◽  
Induced Aggregation

Chitosan-functionalized gold nanoparticles for colorimetric detection of mercury ions based on chelation-induced aggregation

2014 ◽  
Vol 182 (3-4) ◽  
pp. 611-616 ◽  
Author(s):  
Zhengbo Chen ◽  
Chenmeng Zhang ◽  
Yuan Tan ◽  
Tianhui Zhou ◽  
He Ma ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Mercury Ions ◽  
Functionalized Gold Nanoparticles ◽  
Induced Aggregation

scholarly journals Rapid and visual readout of vitamin B1 based on the electrostatic interaction induced aggregation of gold nanoparticles

RSC Advances ◽  
2018 ◽  
Vol 8 (62) ◽  
pp. 35850-35854
Author(s):  
Liping Lin ◽  
Jiajing Wang ◽  
Wei Liu ◽  
Yaxin Luo ◽  
Yanling Xiao ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Electrostatic Interaction ◽  
Colorimetric Detection ◽  
Vitamin B1 ◽  
Induced Aggregation

Schematic illustration for colorimetric detection of VB1 with AuNPs based on the electrostatic interaction.

scholarly journals Target-Induced Aggregation of Gold Nanoparticles for Colorimetric Detection of Bisphenol A

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Sung Hyun Hwang ◽  
Sehan Jeong ◽  
Hyung Joo Choi ◽  
Hyunmin Eun ◽  
Min Geun Jo ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Bisphenol A ◽  
Tap Water ◽  
Colorimetric Detection ◽  
Daily Intake ◽  
Consumer Products ◽  
Dna Aptamer ◽  
Site Quality ◽  
Local Market ◽  
Induced Aggregation

Bisphenol A (BPA) is used in a wide variety of consumer products owing to its beneficial properties of optical clarity, shatter resistance, and heat resistance. However, leached BPA has been shown to disturb the endocrine system and could cause cancer even at low concentrations, which has led to public concern. To reduce the toxic effects caused by BPA, it is important to monitor the BPA levels and its presence in products in a simple, rapid, and on-site manner. Here, we propose a new colorimetric strategy for the simple and rapid detection of BPA employing a DNA aptamer, a cationic surfactant, and gold nanoparticles (AuNPs). Using the developed system, the presence of BPA can be successfully determined based simply on a visually detectable color change from red to blue, triggered by aggregate formation of the AuNPs, which can be monitored even with the naked eye. Under the optimized conditions, this system could detect BPA with excellent selectivity and sensitivity, and its high performance was validated in the receipt obtained from local market and BPA-spiked tap water samples, ensuring its practical applicability. Moreover, the limit of the detection of the system was determined to be 97 nM, which is below the current tolerable daily intake level, demonstrating its suitability for toxicity assessment and on-site quality control in a more economical manner when compared with conventional methods.

Bio-dots assembly-induced aggregation of gold nanoparticles for highly sensitive and selective colorimetric detection of methionine

2017 ◽  
Vol 244 ◽  
pp. 1031-1036 ◽  
Author(s):  
Lan Kuang ◽  
Li Zhang ◽  
Ai-Zhen Xu ◽  
Zhi-Mei Li ◽  
Ru-Ping Liang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Highly Sensitive ◽  
Induced Aggregation

Facile colorimetric detection of human chorionic gonadotropin based on the peptide-induced aggregation of gold nanoparticles

2015 ◽  
Vol 7 (1) ◽  
pp. 29-33 ◽  
Author(s):  
Chia-Chen Chang ◽  
Chen-Yu Chen ◽  
Chie-Pein Chen ◽  
Chii-Wann Lin
Keyword(s):  
Gold Nanoparticles ◽  
Chorionic Gonadotropin ◽  
Human Chorionic Gonadotropin ◽  
Detection Method ◽  
Colorimetric Detection ◽  
Optical Detection ◽  
Binding Peptide ◽  
Induced Aggregation

A facile and rapid optical detection method of human chorionic gonadotropin (hCG) was developed by using the hCG-binding peptide and the anti-aggregation of gold nanoparticles (AuNPs).

scholarly journals A Transparency Sheet-Based Colorimetric Device for Simple Determination of Calcium Ions Using Induced Aggregation of Modified Gold Nanoparticles

2019 ◽  
Vol 20 (12) ◽  
pp. 2954
Author(s):  
Paweenar Duenchay ◽  
Orawon Chailapakul ◽  
Weena Siangproh
Keyword(s):  
Gold Nanoparticles ◽  
Calcium Ions ◽  
Self Assembly ◽  
Electrostatic Interactions ◽  
Low Cost ◽  
Colorimetric Detection ◽  
Absorption Spectrometry ◽  
Alternative Approach ◽  
Induced Aggregation

A simple and novel transparency sheet-based colorimetric detection device using gold nanoparticles (AuNPs) modified by 4-Amino-6-hydroxy-2-mercaptopyrimidine monohydrate (AHMP) was fabricated and developed for the determination of calcium ions (Ca2+). The detection was based on a colorimetric reaction as a result of the aggregation of modified AuNPs induced by Ca2+ due to the ability to form strong electrostatic interactions between positively charged Ca2+ and negatively charged modified AuNPs. Probe solution changes color from red to blue in the presence of Ca2+ and can be observed by the naked eyes. To verify the complete self-assembly of the AHMP onto the AuNP surface, the modified AuNPs were characterized using ultraviolet–visible spectroscopy and zeta potential measurements. Under optimal conditions, a quantitative linearity was 10 to 100 ppm (R2 = 0.9877) with a detection limit of 3.05 ppm. The results obtained by the developed method were in good agreement with standard atomic absorption spectrometry (AAS) results and demonstrated that this method could reliably measure Ca2+. Overall, this novel alternative approach presents a low-cost, simple, sensitive, rapid, and promising device for the detection of Ca2+.

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