Seed-less amino-sugar mediated synthesis of gold nanostars

Moukarzel, Waêl; Fitremann, Juliette; Marty, Jean‐Daniel

doi:10.1039/c1nr10418g

Cited by 45 publications

(42 citation statements)

References 23 publications

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“…The length of the thorns on the nanostars can be tailored by controlling the Au/Ag ratio in the growth solution. By using aminosugars, a series of multipodal gold nanostructures has been obtained via a onepot chemical reduction method in aqueous solution and at room temperature [ 47 ]. The size and shape of these nanoparticles were controlled either by adjusting the amount of reducing agent or by quenching the reaction at a given time.…”

Section: Synthesis Of Gold Nanostars: An Overview Of Synthetic Stratementioning

confidence: 99%

Gold Nanostar Synthesis and Functionalization with Organic Molecules

Pallavicini

Cabrini

Borzenkov

2015

SpringerBriefs in Materials

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Section: Synthesis Of Gold Nanostars: An Overview Of Synthetic Stratementioning

confidence: 99%

Gold Nanostar Synthesis and Functionalization with Organic Molecules

Pallavicini

Cabrini

Borzenkov

2015

SpringerBriefs in Materials

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“…Therefore, the solution remains stable for weeks. [92] In a typical synthesis, 400 μL of an aqueous solution of NaOH (1 mol L À 1 ), 5 mL of a glucosamine · HCl solution (10 À 1 mol L À 1 ) and 5 mL solution of HAuCl 4 (10 À 2 mol L À 1 ) were mixed in 90 mL of ultrapure H 2 O. Within 30 min, solutions with magnetic stirring at 25°C, experienced color transition from colorless to purple-blue.…”

Section: Preparation Of Spherical Nanoparticlesmentioning

confidence: 99%

“…The plasmon band shift is also more sensitive in the case of anisotropic or hollow (gold shells) nanoparticles and for this reason rod, branched or hollow nanoparticles are preferentially used for this purpose . In this work, we used a surfactant‐free method, based on the reduction of the gold tetrachloroauric acid by glucosamine for generating branched gold nanoparticles …”

Section: Introductionmentioning

confidence: 99%

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Polysiloxanes Modified by Thiol‐Ene Reaction and Their Interaction with Gold Nanoparticles

Lemonier

Marty

Fitremann

2019

Helvetica Chimica Acta

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A poly(vinylmethyl‐co‐dimethyl)siloxane has been functionalized with phenylethanethiol, N‐methylmercaptoacetamide and heptadecafluoro‐1‐decanethiol by a thermal radical thiol‐ene reaction initiated by azobisisobutyronitrile. The resulting polymers were obtained in good yields with most of the time a complete conversion of the vinyl groups. The reaction also preserved the fragile polysiloxane backbone. The polymer, grafted with about 25 % of mercapto‐acetamide groups is soluble in polar solvents such as dimethylformamide and dimethyl sulfoxide, opening the way for further functionalization with polar molecules such as unprotected carbohydrates. Spherical and branched gold nanoparticles were coated with these polymers. This coating induced a surface resonance plasmon shift resulting from the interaction of the grafted polysiloxanes with the nanoparticle surface. The shift can be explained by the variation of the refractive index of the side groups but may be also related to the self‐organization of polysiloxanes and their interactions with the gold surface depending on their polarity.

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“…The seedless way represents another simpler means of assembling AuNSs. It involves in situ formation of nanocrystal seeds and subsequent branched growth (Kedia and Kumar 2013;Moukarzel et al 2011;Umadevi et al 2014). For example, 2-[4-(2-hydroxyethyl)-1-piperazinyl] ethanesulfonic acid (HEPES) (Xie et al 2008) and glucosamine (Moukarzel et al 2011) can be applied to reduce Au 3?…”

Section: Introductionmentioning

confidence: 99%

One-pot synthesis of gold nanostars using plant polyphenols for cancer photoacoustic imaging and photothermal therapy

et al. 2016

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Branched plasmonic nanostructures have been found to exhibit strong enhancement of the electromagnetic field surrounding their multibranched petals. This feature endows them with improved performance in catalysis, surface-enhanced Raman scattering, photoacoustic imaging, and photothermal therapy. Albeit several synthesis techniques have been developed, the precisely controlled growth of highly branched nanostructures with a one-pot surfactant-free procedure is still challenging. Herein, we present a simple seedless route to synthesize gold nanostars (AuNSs) using a natural plant polyphenol, gallic acid (GA), as a reducing and stabilizing agent. The size and shape of AuNSs can be tuned by simply adjusting the amount of added GA. Under the optimum condition, the as-prepared AuNSs with diameters about 100 nm exhibit strong near-infrared absorption, good photothermal efficiency, and high biocompatibility. We demonstrate that AuNSs can be utilized for simultaneous photoacoustic imaging and photothermal therapy in living cancer cells. This study highlights facile synthesized AuNSs could serve as a promising platform for cancer diagnosis and therapy.

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Seed-less amino-sugar mediated synthesis of gold nanostars

Cited by 45 publications

References 23 publications

Gold Nanostar Synthesis and Functionalization with Organic Molecules

Gold Nanostar Synthesis and Functionalization with Organic Molecules

Polysiloxanes Modified by Thiol‐Ene Reaction and Their Interaction with Gold Nanoparticles

One-pot synthesis of gold nanostars using plant polyphenols for cancer photoacoustic imaging and photothermal therapy

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