Gold Nanoparticle-Based Fluorometric and Colorimetric Sensing of Copper(II) Ions

2005 ◽  
Vol 17 (23) ◽  
pp. 2811-2815 ◽  
Author(s):  
X. He ◽  
H. Liu ◽  
Y. Li ◽  
S. Wang ◽  
Y. Li ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Colorimetric Sensing

scholarly journals Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4166 ◽  
Author(s):  
Guangyang Liu ◽  
Meng Lu ◽  
Xiaodong Huang ◽  
Tengfei Li ◽  
Donghui Xu
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Rapid Testing ◽  
Colorimetric Sensing ◽  
Preparation Methods ◽  
Particle Spacing ◽  
Advantages And Disadvantages ◽  
Site Monitoring ◽  
Biological Affinity ◽  
Food Quality And Safety

Due to their unique optical properties, narrow size distributions, and good biological affinity, gold nanoparticles have been widely applied in sensing analysis, catalytic, environmental monitoring, and disease therapy. The color of a gold nanoparticle solution and its maximum characteristic absorption wavelength will change with the particle size and inter-particle spacing. These properties are often used in the detection of hazardous chemicals, such as pesticide residues, heavy metals, banned additives, and biotoxins, in food. Because the gold nanoparticles-colorimetric sensing strategy is simple, quick, and sensitive, this method has extensive applications in real-time on-site monitoring and rapid testing of food quality and safety. Herein, we review the preparation methods, functional modification, photochemical properties, and applications of gold nanoparticle sensors in rapid testing. In addition, we elaborate on the colorimetric sensing mechanisms. Finally, we discuss the advantages and disadvantages of colorimetric sensors based on gold nanoparticles, and directions for future development.

A duplex DNA–gold nanoparticle probe composed as a colorimetric biosensor for sequence-specific DNA-binding proteins

The Analyst ◽  
2016 ◽  
Vol 141 (6) ◽  
pp. 2040-2045 ◽  
Author(s):  
Junho Ahn ◽  
Yeonweon Choi ◽  
Ae-Ree Lee ◽  
Joon-Hwa Lee ◽  
Jong Hwa Jung
Keyword(s):  
Dna Binding ◽  
Gold Nanoparticle ◽  
Binding Proteins ◽  
Dna Binding Proteins ◽  
Duplex Dna ◽  
Colorimetric Sensing

The SPL-12-mediated change of Au aggregation via duplex DNA–SPL-12 interactions could be utilized for colorimetric sensing of SPL-12 using duplex DNA–Au.

Gold nanoparticle aggregation enables colorimetric sensing assays for enzymatic decarboxylation

2017 ◽  
Vol 9 (19) ◽  
pp. 2784-2787 ◽  
Author(s):  
Mohamed Nilam ◽  
Andreas Hennig ◽  
Werner M. Nau ◽  
Khaleel I. Assaf
Keyword(s):  
Gold Nanoparticle ◽  
Fundamental Importance ◽  
Colorimetric Sensing ◽  
Nanoparticle Aggregation ◽  
Biological Phenomena ◽  
Gold Nanoparticle Aggregation ◽  
Enzymatic Decarboxylation

Monitoring enzymatic processes is of fundamental importance for the understanding of the associated biological phenomena.

Gold nanoparticle-based nano-probe for the colorimetric sensing of Cr3+and Cr2O72−by the coordination strategy

Nanoscale ◽  
2017 ◽  
Vol 9 (48) ◽  
pp. 19139-19144 ◽  
Author(s):  
Jianjun Du ◽  
Haoying Ge ◽  
Quanyong Gu ◽  
Hong Du ◽  
Jiangli Fan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Quantitative Determination ◽  
Gold Nanoparticle ◽  
Colorimetric Sensing ◽  
Coordination Strategy

The Eyedropper function in Microsoft PowerPoint was introduced into the gold nanoparticles-based colorimetric recognition of Cr3+and Cr2O72−, which makes the quantitative determination easier, more convenient and more accurate.

Application of modifier-free gold nanoparticle colorimetric sensing for rapid screening and detection of vitamin B1

2020 ◽  
Vol 44 (22) ◽  
pp. 9223-9229 ◽  
Author(s):  
Paweenar Duenchay ◽  
Kantima Kaewjua ◽  
Orawon Chailapakul ◽  
Weena Siangproh
Keyword(s):  
Gold Nanoparticle ◽  
Vitamin B1 ◽  
Urine Samples ◽  
Rapid Screening ◽  
Colorimetric Sensing ◽  
Selective Determination ◽  
Sensing Platform ◽  
Free Gold

A simple and fast alternative colorimetric sensing platform for selective determination of vitamin B1 in urine samples was proposed.

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