Controlled spontaneous generation of gold nanoparticles assisted by dual reducing and capping agents

Dumur, Frédéric; Guerlin, Audrey; Dumas, Eddy; Bertin, Denis; Gigmès, Didier; Mayer, Cédric R.

doi:10.1007/s13404-011-0018-5

Cited by 98 publications

(48 citation statements)

References 176 publications

(145 reference statements)

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“…Furthermore, the block copolymer-and supramolecule-mediated synthesis of gold nanoparticles has been developed because the block copolymers and supramolecules can display dual function: the reducing function for metal ions and capping (stabilizing) function for metal nanoparticles formed [22][23][24][25][26][27][28][29][30][31][32]. Silver (Ag) nanoparticles are synthesized through the citrate reduction, silver mirror reaction, polyol process, seed-mediated growth and light-mediated synthesis [19].…”

Section: Introductionmentioning

confidence: 99%

Block copolymer-mediated synthesis of silver nanoparticles from silver ions in aqueous media

Sakai

Ishihara

Alexandridis

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Section: Introductionmentioning

confidence: 99%

Block copolymer-mediated synthesis of silver nanoparticles from silver ions in aqueous media

Sakai

Ishihara

Alexandridis

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…There are a number of reports on the utilization of organic thiols as capping agents for gold nanoparticles including the pioneering work done by Brust et al [12]. On the other hand, the block copolymer-and supramolecule-mediated synthesis of gold nanoparticles has been recently developed because the block copolymers and supramolecules can display dual function: the reducing function for metal ions and capping (stabilizing) function for metal nanoparticles formed [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Block copolymer-mediated synthesis of gold nanoparticles in aqueous solutions: Segment effect on gold ion reduction, stabilization, and particle morphology

Sakai

Horiuchi

Alexandridis

et al. 2013

Journal of Colloid and Interface Science

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We report here on the segment effects of poly(ethylene oxide)-containing block copolymers (PEO-BCP) on the reduction activity for tetrachloride gold(III) ([AuCl 4 ] -), interfacial activity for gold surface, colloidal stability and morphology of gold nanoparticles formed in aqueous solutions. In particular, the effects of poly Consequently, the colloidal stability of gold nanoparticles formed in aqueous PEO-PPO-NH 2 solutions was extremely high compared with that in PEO, PEO-PPO-PEO and PE-PEO solutions. In addition, the size of gold nanoparticles formed in aqueous PEO-PPO-NH 2 solutions was much smaller than that in aqueous solutions of PEO-PPO-PEO, PEO or PE-PEO.

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“…In this way, the oily phase behaves at the same time as a reducing and a very efficient capping agent [15][16][17], leading to a simple method to prepare gold nanoparticles constituted by a very small number of atoms and even single-atom species. This effect of the essential oils shall be related to their specific chemical composition and the way their individual chemical components react with the aqua regia to yield complex mixtures of oxidation compounds.…”

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confidence: 99%

Generation of gold nanoparticles according to procedures described in the eighteenth century

et al. 2014

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Gold nanoparticles have received much attention in recent years due to their unique size-dependent properties, as they find useful applications in materials science [Mayoral et al. (Nanoscale 2:335-342, 2010) [Sperling et al. (Chem Soc Rev 37:1896-1908, 2008]. The preparation of such nanoparticles benefits from modern chemical knowledge, and a large variety of several procedures have been developed aiming at controlling the size and shape of these metal nanoparticles. Here, we show that two eighteenth-century recipes (Online Resource 1) used at that time to prepare drinkable solutions of gold, used as drugs, actually generate gold nanoparticles, clusters and even monoatomic species of gold. These simple methods involve the dissolution of gold in a solution of ammonium chloride in nitric acid (aqua regia) and the mixing of the resulting solution with rosemary or cinnamon essential oils. The complex mixture of compounds resulting from the fast reaction between aqua regia and the essential oils behave simultaneously as reductants and stabilisers of the nascent gold particles. These results not only prove that historical speculations on the presence of finely divided gold particles floating in these solutions were basically correct but they could also serve as a source of inspiration for new experimental approaches procuring the generation of stable sub-nanometer gold nanoparticles. Keywords Gold nanoparticles . STEM . Eighteenth-century recipes . Essential oilThere is a general agreement that the first scientific approach to the nature of what are now known as solutions of colloidal gold can be traced back to the works of the British scientist Michael Faraday. In a seminal paper published in 1857 [1, 2], he clearly concluded that the ruby or purple colours exhibited by solutions containing gold were due to the presence of very small particles of this metal, so small that they were invisible to the human eye, yet they could be easily detected by their effect in dispersing incident light.As important as this publication is as pioneering the foundation of modern colloid chemistry, Faraday was not the first in preparing such ruby-coloured solutions neither in suggesting the presence in them of gold in such an extremely divided state.There is a long tradition behind the preparation of colloidal gold, which can be briefly summarised as follows. Historically, two main research lines were developed aiming at two different purposes. One of them was directed toward the preparation of colloidal gold to be used for colouring the transparent glass into red colour, resulting in the much sought, valuable and beautiful ruby glass [3]. The second approach belongs to the field of medicine, where the goal was to prepare a gold drinkable solution which behaved as a powerful drug able to cure even the most severe ailments, the so-called potable gold, known in old Latin texts as aurum potabile [4,5]. Although its origin can be traced back to the Middle Ages, Electronic supplementary material The online version of this article

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Controlled spontaneous generation of gold nanoparticles assisted by dual reducing and capping agents

Abstract: International audienc

Cited by 98 publications

References 176 publications

Block copolymer-mediated synthesis of silver nanoparticles from silver ions in aqueous media

Block copolymer-mediated synthesis of silver nanoparticles from silver ions in aqueous media

Block copolymer-mediated synthesis of gold nanoparticles in aqueous solutions: Segment effect on gold ion reduction, stabilization, and particle morphology

Generation of gold nanoparticles according to procedures described in the eighteenth century

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