A seed-less method for synthesis of ultra-thin gold nanosheets by using a deep eutectic solvent and gum arabic and their electrocatalytic application

Tohidi, Maryam; Mahyari, Farzaneh Aghakhani; Safavi, Afsaneh

doi:10.1039/c4ra17053a

Cited by 47 publications

(24 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Gold nanoparticles (AuNPs) of varying morphologies are especially sought after as they have many applications in catalysis [11][12][13] , biosensing [14][15][16][17][18] and therapeutics 19,20 . Anisotropic particles, in particular gold nanosheets and core@shell particles have gained particular attention [21][22][23][24][25][26][27] as they possess enhanced optical properties for the treatment of tumours 20 , enhanced Raman detection 28 and optical sensors 29,30 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Gold Nanoparticles Using the Interface of an Emulsion Droplet

Sachdev¹,

Maugi²,

Woolley³

et al. 2017

Langmuir

View full text Add to dashboard Cite

A facile and rapid method for synthesizing single crystal gold spherical or platelet (nonspherical) particles is reported. The reaction takes place at the interface of two immiscible liquids where the reducing agent decamethylferrocene (DmFc) was initially added to hexane and gold chloride (AuCl) to an aqueous phase. The reaction is spontaneous at room temperature, leading to the creation of Au nanoparticles (AuNP). A flow focusing microfluidic chip was used to create emulsion droplets, allowing the same reaction to take place within a series of microreactors. The technique allows the number of droplets, their diameter, and even the concentration of reactants in both phases to be controlled. The size and shape of the AuNP are dependent upon the concentration of the reactants and the size of the droplets. By tuning the reaction parameters, the synthesized nanoparticles vary from nanometer to micrometer sized spheres or platelets. The surfactant used to stabilize the emulsion was also shown to influence the particle shape. Finally, the addition of other nanoparticles within the droplet allows for core@shell particles to be readily formed, and we believe this could be a versatile platform for the large scale production of core@shell particles.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis of Gold Nanoparticles Using the Interface of an Emulsion Droplet

Sachdev¹,

Maugi²,

Woolley³

et al. 2017

Langmuir

View full text Add to dashboard Cite

show abstract

“…[30] Briefly, a 10-mL solution of aqueous 0.01% (w6 v) DES containing 15 mg of GA was prepared. Different volumes of HAuCl 4 solution (0.05 M) were added to the above solution with continuous stirring under ambient conditions.…”

Section: Synthesis Of Gnpsmentioning

confidence: 99%

A new X-ray contrast agent based on highly stable gum arabic-gold nanoparticles synthesised in deep eutectic solvent

Shahidi

Iranpour

et al. 2014

Journal of Experimental Nanoscience

Self Cite

View full text Add to dashboard Cite

(2015) A new X-ray contrast agent based on highly stable gum arabic-gold nanoparticles synthesised in deep eutectic solvent, Journal of Experimental Nanoscience, 10:12, 911-924, DOI: 10.1080/17458080.2014 To link to this article: https://doi.org/10.1080/17458080.2014.933493 This paper reports a novel method of fabricating gum arabic coated gold nanoparticles (GA-GNPs) synthesised in a deep eutectic solvent (DES) for use as a new X-ray contrast agent. GA-GNPs were prepared simply by mixing a solution of 0.01% DES, GA and tetra chloroauric (III) acid at room temperature. DES was prepared using choline chloride (ChCl), gallic acid and glycerol as the precursors. A complete characterisation study of GA-GNPs was undertaken using transmission electron microscopy, dynamic light scattering, X-ray diffraction analysis. In vitro study of the as-prepared GA-GNPs revealed the high potential of these nanoparticles as X-ray contrast agents. Compared with the common clinically available CT contrast agent, Visipaque, the synthesised GA-GNPs showed more than three fold X-ray attenuation coefficient. GA-GNPs were found to be remarkably stable in biological media. The development of such nontoxic, biocompatible nanostructures could be an advancement in diagnostic nanomedicine.

show abstract

“…Many efforts have been devoted to the shape-controlled synthesis of Au NCs with different morphologies, such as nanospheres, nanorods, nanowires, nanodendrites, nanosheets, nanocombs and pentagon-shaped particles. [21][22][23][24][25][26] In general, Au NCs are prepared by using wet chemistry, hydrothermal synthesis, seeded growth and electrochemical synthesis. 27 Using chemical reduction methods, undesirable excessive reducing agents may increase the cost in mass production, contaminate the chemically reduced Au NCs, and affect the electrocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Shape-controlled electrochemical synthesis of Au nanocrystals in reline: control conditions and electrocatalytic oxidation of ethylene glycol

Chen

Duan

et al. 2017

RSC Adv.

View full text Add to dashboard Cite

Gold nanocrystals (NCs) as advanced catalysts towards ethylene glycol (EG) electrooxidation in direct alcohol fuel cells (DAFCs) have some advantages, such as good poisoning-resistance and high electrocatalytic activity. The shape and size control of Au NCs are crucial to their electrocatalytic activity.In this work, the control of morphologies and sizes of prepared Au NCs in reline are systematically investigated by changing electrodeposition conditions: the applied potential, electrodeposition temperature, HAuCl 4 concentration and electrodeposition time. Results show that reline (a deep eutectic solvent (DES), a mixture of choline chloride and urea at the molar ratio of 1 : 2) plays an important part in the nucleation and growth of the star-like Au NCs. This approach for preparing star-like Au NCs in reline does not need any supporting electrolyte and organic solvent, and thus is more environmentally friendly than water as a medium. The electrode modified by the as-prepared Au nanostars (NSs) exhibits a good poisoning-resistance ability and electrocatalytic activity for EG electrooxidation in alkaline media. This strategy is a significant way for shape-controlled synthesis of noble metal nanomaterials in DESs that may have potential applications in fields of electrochemical sensors, electrocatalysis and fuel cells.

show abstract

A seed-less method for synthesis of ultra-thin gold nanosheets by using a deep eutectic solvent and gum arabic and their electrocatalytic application

Abstract: Ultra-thin and large gold nanosheets were easily synthesized by using a deep eutectic solvent as a reducing and directing agent with gum arabic as a stabilizer and shape-controlling agent through a seed-less protocol.

Cited by 47 publications

References 68 publications

Synthesis of Gold Nanoparticles Using the Interface of an Emulsion Droplet

Synthesis of Gold Nanoparticles Using the Interface of an Emulsion Droplet

A new X-ray contrast agent based on highly stable gum arabic-gold nanoparticles synthesised in deep eutectic solvent

Shape-controlled electrochemical synthesis of Au nanocrystals in reline: control conditions and electrocatalytic oxidation of ethylene glycol

Contact Info

Product

Resources

About