scholarly journals Polyamine Ligand-Mediated Self-Assembly of Gold and Silver Nanoparticles into Chainlike Structures in Aqueous Solution: Towards New Nanostructured Chemosensors

ChemistryOpen ◽  
2013 ◽  
Vol 2 (5-6) ◽  
pp. 166-166
Author(s):  
Adrián Fernández-Lodeiro ◽  
Javier Fernández-Lodeiro ◽  
Cristina Núñez ◽  
Rufina Bastida ◽  
José Luis Capelo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Self Assembly ◽  
Gold And Silver Nanoparticles

scholarly journals Polyamine Ligand-Mediated Self-Assembly of Gold and Silver Nanoparticles into Chainlike Structures in Aqueous Solution: Towards New Nanostructured Chemosensors

ChemistryOpen ◽  
2013 ◽  
Vol 2 (5-6) ◽  
pp. 200-207 ◽  
Author(s):  
Adrián Fernández-Lodeiro ◽  
Javier Fernández-Lodeiro ◽  
Cristina Núñez ◽  
Rufina Bastida ◽  
José Luis Capelo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Self Assembly ◽  
Gold And Silver Nanoparticles

scholarly journals Cover Picture: Polyamine Ligand-Mediated Self-Assembly of Gold and Silver Nanoparticles into Chainlike Structures in Aqueous Solution: Towards New Nanostructured Chemosensors (ChemistryOpen 5-6/2013)

ChemistryOpen ◽  
2013 ◽  
Vol 2 (5-6) ◽  
pp. 165-165
Author(s):  
Adrián Fernández-Lodeiro ◽  
Javier Fernández-Lodeiro ◽  
Cristina Núñez ◽  
Rufina Bastida ◽  
José Luis Capelo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Self Assembly ◽  
Gold And Silver Nanoparticles

Simultaneously Synthesis and Encapsulation of Metallic Nanoparticles Using Linear–Dendritic Block Copolymers of Poly(ethylene glycol)-Poly(citric acid)

2011 ◽  
Vol 478 ◽  
pp. 7-12 ◽  
Author(s):  
Ashkan Tavakoli Naeini ◽  
Manouchehr Vossoughi ◽  
Mohsen Adeli
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Citric Acid ◽  
Ethylene Glycol ◽  
Aqueous Solutions ◽  
Metallic Nanoparticles ◽  
Loading Capacity ◽  
Poly Ethylene Glycol ◽  
Gold And Silver Nanoparticles ◽  
Poly Ethylene

Linear-dendritic triblock copolymers of linear poly(ethylene glycol) and hyperbranched poly(citric acid) (PCA-PEG-PCA) were used as the reducing and capping agents to encapsulate gold and silver nanoparticles (AuNPs and AgNPs). PCA-PEG-PCA copolymers in four different molecular weights were synthesized using 2, 5, 10 and 20 citric acid/PEG molar ratios and were called A1, A2, A3 and A4, respectively. Nanoparticles were encapsulated simultaneously during the preparation process. AuNPs were simply synthesized and encapsulated by addition a boiling aqueous solution of HAuCl4 to aqueous solutions of A1, A2, A3 and A4. In the case of silver, an aqueous solution of AgNO3 was reduced using NaBH4 and AgNPs were encapsulated simultaneously by adding aqueous solutions of different PCA-PEG-PCA to protect the fabricated silver nanoparticles from aggregation. Encapsulated AuNPs and AgNPs were stable in water for several months and agglomeration did not occur. The synthesized silver and gold nanoparticles have been encapsulated within PCA-PEG-PCA macromolecules and have been studied using Transmission Electron Microscopy (TEM) and UV/Vis absorption spectroscopy. Studies reveal that there was a reverse relation between the size of synthesized AuNPs/AgNPs and the size of citric acid parts of PCA-PEG-PCA copolymers. For example, the prepared gold and silver nanoparticles by A3 copolymer are of an average size of 8 nm and 16 nm respectively. Finally, the loading capacity of A1, A2, A3 and A4 and the size of synthesized AuNPs and AgNPs were investigated using UV/Vis data and the corresponding calibration curve. It was found that the loading capacity of copolymers depends directly on the concentration of copolymers and their molecular weight.

Comparative Study of the Self-Assembly of Gold and Silver Nanoparticles onto Thiophene Oil

Langmuir ◽  
2014 ◽  
Vol 30 (39) ◽  
pp. 11520-11527 ◽  
Author(s):  
Manuel Gadogbe ◽  
Siyam M. Ansar ◽  
I-Wei Chu ◽  
Shengli Zou ◽  
Dongmao Zhang
Keyword(s):  
Silver Nanoparticles ◽  
Comparative Study ◽  
Self Assembly ◽  
The Self ◽  
Gold And Silver Nanoparticles

Self-assembly of silver nanoparticles into dendritic flowers from aqueous solution

2010 ◽  
Vol 5 (1) ◽  
pp. 10-16 ◽  
Author(s):  
Andrew L. Swatek ◽  
Zheng Dong ◽  
John Shaw ◽  
M. Rafiq Islam
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Self Assembly

Preparation of BSA Nanoparticles by Desolvation Technique Using Acetone as Desolvating Agent

2012 ◽  
Vol 5 (1) ◽  
pp. 1643-1647
Author(s):  
Krishna Sailaja A ◽  
Amareshwar P
Keyword(s):  
Aqueous Solution ◽  
Standard Deviation ◽  
Process Parameters ◽  
Self Assembly ◽  
Size Control ◽  
Polymeric Materials ◽  
Preparation Condition ◽  
Assembly Process ◽  
Average Size

In order to see the functionality and toxicity of nanoparticles in various food and drug applications, it is important to establish procedures to prepare nanoparticles of a controlled size. Desolvation is a thermodynamically driven self-assembly process for polymeric materials. In this study, we prepared BSA nanoparticles using the desolvation technique using acetone as desolvating agent. Acetone was added intermittently into 1% BSA solution at different pH under stirring at 700 rpm. Amount of acetone added, intermittent timeline of acetone addition, and pH of solution were considered as process parameters to be optimized. The effect of the process parameters on size of the nanoparticles was studied. The results indicated that the size control of BSA nanoparticles was achieved by adding acetone intermittently. The standard deviation of average size of BSA nanoparticles at each preparation condition was minimized by adding acetone intermittently. The intermittent addition in polymeric aqueous solution can be useful for size control for food or drug applications.  

Capillary flows and self-assembly of porous hydrate structures

2012 ◽  
Vol 9 (1) ◽  
pp. 22-25
Author(s):  
S.V. Amel’kin ◽  
D.Ye. Igoshin
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Self Assembly ◽  
Capillary Flow ◽  
Secondary Crystallization ◽  
Assembly Model ◽  
Physical Processes ◽  
Good Correspondence ◽  
Solution Formation ◽  
Capillary Flows

A self-assembly model for porous hydrate structures is proposed, which takes into account the sequence of basic physical processes: hydrate growth on the surface of the aqueous solution, formation of islet structure, capillary flow, separation and transfer of secondary crystallization nuclei to the meniscus. The model was studied within the cellular automata method. A good correspondence between the results of the simulation and the experimental data is obtained.

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