Spontaneous Formation of Gold Nanoparticles in Aqueous Solution of Sugar-Persubstituted Poly(amidoamine)dendrimers

Langmuir ◽  
2000 ◽  
Vol 16 (6) ◽  
pp. 2978-2980 ◽  
Author(s):  
Kunio Esumi ◽  
Tomoyuki Hosoya ◽  
Akihiro Suzuki ◽  
Kanjiro Torigoe
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Spontaneous Formation

Spontaneous Formation of Giant Phospholipid Vesicles

1988 ◽  
Vol 43 (11-12) ◽  
pp. 938-947 ◽  
Author(s):  
Rolf-M. Servuss
Keyword(s):  
Aqueous Solution ◽  
Light Microscopy ◽  
Fluid Phase ◽  
Significant Part ◽  
Phospholipid Vesicles ◽  
Electrostatic Repulsion ◽  
Giant Vesicles ◽  
Spontaneous Formation

The spontaneous formation of giant (diameter > 10 μm) vesicles from a number of phospholipids in excess aqueous solution has been studied by light-microscopy. Electrically neutral as well as charged phospholipids swell to form giant vesicles only if the lipids are in the fluid phase. This shows that electrostatic repulsion alone cannot explain the spontaneous formation of giant vesicles. The results confirm the suggestion that steric forces between extended membranes play a significant part in this process.

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

Gold Nanoparticles of Multiple Shapes Synthesized in l-Tryptophan Aqueous Solution

2018 ◽  
Vol 24 (5) ◽  
pp. 401-414
Author(s):  
Jinsheng Sun ◽  
Guangxin Liu ◽  
Sheng Fu ◽  
Fang Cai ◽  
Hong Yin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles

Cationic polymers and aptamers mediated aggregation of gold nanoparticles for the colorimetric detection of arsenic(iii) in aqueous solution

2012 ◽  
Vol 48 (37) ◽  
pp. 4459 ◽  
Author(s):  
Yuangen Wu ◽  
Shenshan Zhan ◽  
Faze Wang ◽  
Lan He ◽  
Wenting Zhi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Cationic Polymers

Colorimetric Detection of Trace Arsenic(III) in Aqueous Solution Using Arsenic Aptamer and Gold Nanoparticles

2014 ◽  
Vol 67 (5) ◽  
pp. 813 ◽  
Author(s):  
Minglei Yu
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Detection Limit ◽  
Colorimetric Assay ◽  
Colorimetric Detection ◽  
Colour Change ◽  
Colorimetric Sensing ◽  
Detection Range ◽  
Colorimetric Indicator ◽  
Blue Solution

In this study, trace arsenic(iii) (AsIII) in aqueous solution was detected by applying a classical aptamer-based gold nanoparticles colorimetric sensing strategy. An arsenic aptamer was used as a sensing probe and gold nanoparticles as a colorimetric indicator. In the absence of AsIII, the gold nanoparticles were stabilised by the arsenic aptamer and remained dispersed at high NaCl concentrations, displaying a red solution. Contrarily, in the presence of AsIII, the gold nanoparticles were prone to aggregation, owing to the formation of aptamer–AsIII complex between the arsenic aptamer and AsIII, and thus exhibited a blue solution. By monitoring the colour change, a simple and fast colorimetric assay for AsIII was established with a detection range of 1.26–200 ppb and a detection limit of 1.26 ppb. Because this colorimetric assay only involves common reagents and can be assessed visually, it holds great potential for arsenic(iii) monitoring in environment-related and other applications.

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