Label-free colorimetric logic gates based on free gold nanoparticles and the coordination strategy between cytosine and silver ions

2016 ◽  
Vol 40 (6) ◽  
pp. 5516-5522 ◽  
Author(s):  
Yan Zhang ◽  
Meng Li ◽  
Haiyun Liu ◽  
Shenguang Ge ◽  
Jinghua Yu
Keyword(s):  
Gold Nanoparticles ◽  
Silver Ions ◽  
Logic Gates ◽  
Label Free ◽  
Colorimetric Sensing ◽  
Coordination Strategy ◽  
Free Gold

A colorimetric sensing strategy combined with logic gates was demonstrated by taking advantage of the dispersion and aggregation of gold nanoparticles.

A Fluorescence Sensor for Lead (II) Ions Determination Based on Label-Free Gold Nanoparticles (GNPs)-DNAzyme Using Time-Gated Mode in Aqueous Solution

2016 ◽  
Vol 27 (2) ◽  
pp. 643-649 ◽  
Author(s):  
Xiao-Yu Wang ◽  
Cheng-Gang Niu ◽  
Li-Juan Guo ◽  
Liu-Yin Hu ◽  
Sheng-Quan Wu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Fluorescence Sensor ◽  
Label Free ◽  
Free Gold

scholarly journals Label free colorimetric sensing of thiocyanate based on inducing aggregation of Tween 20-stabilized gold nanoparticles

The Analyst ◽  
2012 ◽  
Vol 137 (11) ◽  
pp. 2682 ◽  
Author(s):  
Zhiyang Zhang ◽  
Jun Zhang ◽  
Chengli Qu ◽  
Dawei Pan ◽  
Zhaopeng Chen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Tween 20 ◽  
Label Free ◽  
Colorimetric Sensing

Colorimetric Detection of DNA Sequences Using an Organic Solvent to Induce the Aggregation of Label-Free Gold Nanoparticles

2013 ◽  
Vol 13 (6) ◽  
pp. 3805-3809 ◽  
Author(s):  
Huning Jia ◽  
Xiaomei Cao ◽  
Cong Fu ◽  
Jianping Wang ◽  
Zhiyao Chen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Organic Solvent ◽  
Dna Sequences ◽  
Colorimetric Detection ◽  
Label Free ◽  
Free Gold

Determination of cysteamine using label-free gold nanoparticles

2012 ◽  
Vol 4 (10) ◽  
pp. 3193 ◽  
Author(s):  
Vladimir V. Apyari ◽  
Stanislava G. Dmitrienko ◽  
Viktoriya V. Arkhipova ◽  
Aydar G. Atnagulov ◽  
Yuri A. Zolotov
Keyword(s):  
Gold Nanoparticles ◽  
Label Free ◽  
Free Gold

Highly selective and sensitive detection of Cr6+ ions using size-specific label-free gold nanoparticles

2017 ◽  
Vol 251 ◽  
pp. 683-691 ◽  
Author(s):  
Rajalakshmi Kanagaraj ◽  
Yun-Sik Nam ◽  
Sung Jin Pai ◽  
Sang Soo Han ◽  
Kang-Bong Lee
Keyword(s):  
Gold Nanoparticles ◽  
Sensitive Detection ◽  
Label Free ◽  
Free Gold ◽  
Specific Label

A colorimetric logic gate based on free gold nanoparticles and the coordination strategy between melamine and mercury ions

2013 ◽  
Vol 49 (39) ◽  
pp. 4196-4198 ◽  
Author(s):  
Jianjun Du ◽  
Shengyan Yin ◽  
Lin Jiang ◽  
Bing Ma ◽  
Xiaodong Chen
Keyword(s):  
Gold Nanoparticles ◽  
Logic Gate ◽  
Mercury Ions ◽  
Coordination Strategy ◽  
Free Gold

scholarly journals Specific pH effect for selective colorimetric assay of glutathione using anti-aggregation of label-free gold nanoparticles

RSC Advances ◽  
2017 ◽  
Vol 7 (22) ◽  
pp. 13426-13432 ◽  
Author(s):  
Jian-Fang Li ◽  
Peng-Cheng Huang ◽  
Fang-Ying Wu
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Assay ◽  
Ph Effect ◽  
Colorimetric Method ◽  
Label Free ◽  
Free Gold

An operationally simple colorimetric method for measuring glutathione (GSH) concentration was developed using anti-aggregation of gold nanoparticles (AuNPs) in this work.

scholarly journals Colorimetric Sensing with Gold Nanoparticles on Electrowetting-Based Digital Microfluidics

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1423
Author(s):  
Zhen Gu ◽  
Jing-Jing Luo ◽  
Le-Wei Ding ◽  
Bing-Yong Yan ◽  
Jia-Le Zhou ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Low Cost ◽  
Digital Microfluidics ◽  
High Sensitivity ◽  
Bulk Solution ◽  
Label Free ◽  
Colorimetric Sensing ◽  
Wide Range ◽  
The Stability ◽  
Digital Microfluidic

Digital microfluidic (DMF) has been a unique tool for manipulating micro-droplets with high flexibility and accuracy. To extend the application of DMF for automatic and in-site detection, it is promising to introduce colorimetric sensing based on gold nanoparticles (AuNPs), which have advantages including high sensitivity, label-free, biocompatibility, and easy surface modification. However, there is still a lack of studies for investigating the movement and stability of AuNPs for in-site detection on the electrowetting-based digital microfluidics. Herein, to demonstrate the ability of DMF for colorimetric sensing with AuNPs, we investigated the electrowetting property of the AuNPs droplets on the hydrophobic interface of the DMF chip and examined the stability of the AuNPs on DMF as well as the influence of evaporation to the colorimetric sensing. As a result, we found that the electrowetting of AuNPs fits to a modified Young–Lippmann equation, which suggests that a higher voltage is required to actuate AuNPs droplets compared with actuating water droplets. Moreover, the stability of AuNPs was maintained during the processing of electrowetting. We also proved that the evaporation of droplets has a limited influence on the detections that last several minutes. Finally, a model experiment for the detection of Hg2+ was carried out with similar results to the detections in bulk solution. The proposed method can be further extended to a wide range of AuNPs-based detection for label-free, automatic, and low-cost detection of small molecules, biomarkers, and metal ions.

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