Responsive disassembly of the gold nanoparticle aggregates triggered by the competitive adsorption for lighting up the colorimetric sensing

2013 ◽  
Vol 5 (13) ◽  
pp. 3242 ◽  
Author(s):  
Yali Liu ◽  
Yamei Yang ◽  
Xijuan Zhao ◽  
Zhongde Liu ◽  
Yuanfang Li
Keyword(s):  
Gold Nanoparticle ◽  
Competitive Adsorption ◽  
Colorimetric Sensing ◽  
Nanoparticle Aggregates

Preparation of controlled gold nanoparticle aggregates using a dendronization strategy

2012 ◽  
Vol 384 (1) ◽  
pp. 10-21 ◽  
Author(s):  
Julieta I. Paez ◽  
Eduardo A. Coronado ◽  
Miriam C. Strumia
Keyword(s):  
Gold Nanoparticle ◽  
Nanoparticle Aggregates

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.

Dynamic motions and architectural changes in DNA supramolecular aggregates visualized via transmission electron microscopy without liquid cells

Nanoscale ◽  
2021 ◽  
Vol 13 (37) ◽  
pp. 15928-15936
Author(s):  
Zhuoyang Lu ◽  
Xiangyang Liu ◽  
Maogang He ◽  
Jiangang Long ◽  
Jiankang Liu
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ionic Liquids ◽  
Gold Nanoparticle ◽  
Dynamic Processes ◽  
Nanometer Resolution ◽  
Transmission Electron ◽  
Nanoparticle Aggregates ◽  
Supramolecular Aggregates

The nonvolatility and remarkable solvation property of ionic liquids is exploited to image the dynamic processes of DNA supramolecular aggregates and gold nanoparticle aggregates at nanometer resolution in an unsealed manner.

Metabolizable dopamine-coated gold nanoparticle aggregates: preparation, characteristics, computed tomography imaging, acute toxicity, and metabolism in vivo

2016 ◽  
Vol 4 (6) ◽  
pp. 1090-1099 ◽  
Author(s):  
Yao Yu ◽  
Youshen Wu ◽  
Jiajun Liu ◽  
Ke Li ◽  
Daocheng Wu
Keyword(s):  
Computed Tomography ◽  
Acute Toxicity ◽  
Gold Nanoparticle ◽  
Circulation Time ◽  
Computed Tomography Imaging ◽  
Lower Toxicity ◽  
Tomography Imaging ◽  
Imaging Results ◽  
Nanoparticle Aggregates

We prepared metabolizable MSA AuNPs@DPA aggregates, which exhibit improved CT imaging results, much lower toxicity and much longer circulation time in vivo.

Reversible Generation of Gold Nanoparticle Aggregates with Changeable Interparticle Interactions by UV Photoactivation

Langmuir ◽  
2004 ◽  
Vol 20 (3) ◽  
pp. 575-578 ◽  
Author(s):  
Anjali Pal ◽  
Sujit Kumar Ghosh ◽  
Kunio Esumi ◽  
Tarasankar Pal
Keyword(s):  
Gold Nanoparticle ◽  
Interparticle Interactions ◽  
Nanoparticle Aggregates

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

pH-Induced Reversible Expansion/Contraction of Gold Nanoparticle Aggregates

Small ◽  
2008 ◽  
Vol 4 (12) ◽  
pp. 2191-2194 ◽  
Author(s):  
Yi Chen ◽  
Chengde Mao
Keyword(s):  
Gold Nanoparticle ◽  
Nanoparticle Aggregates

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.

Structural correlations with shifts in the extended plasma resonance of gold nanoparticle aggregates

2005 ◽  
Vol 27 (7) ◽  
pp. 1197-1203 ◽  
Author(s):  
Thaddeus J. Norman ◽  
Christian D. Grant ◽  
Adam M. Schwartzberg ◽  
Jin Z. Zhang
Keyword(s):  
Gold Nanoparticle ◽  
Plasma Resonance ◽  
Extended Plasma ◽  
Nanoparticle Aggregates
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