Asymmetric gold nanoparticles synthesized in the presence of maltose-modified poly(ethyleneimine)

Köth, Anja; Appelhans, Dietmar; Prietzel, Claudia; Koetz, Joachim

doi:10.1016/j.colsurfa.2012.08.004

Cited by 18 publications

(7 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…24,25 It was also shown that the functionalization of amine groups with alkyl chains or maltose units could significantly affect the morphology of gold NPs, including the appearance of anisometric nanohybrids. 26,27…”

Section: Introductionmentioning

confidence: 99%

Preparation of Gold Nanocomposites with Tunable Charge and Hydrophobicity via the Application of Polymer/Surfactant Complexation

et al. 2017

View full text Add to dashboard Cite

During the synthesis of gold nanoparticle (NP) assemblies, the interfacial charge and hydrophobicity of the primary particles play a distinguished role. In the present article, we demonstrate that the association of poly(ethyleneimine) (PEI) capped gold NPs with sodium alkyl sulfates provide a powerful route for the manipulation of these interfacial properties. Dynamic light-scattering, electrophoretic mobility, UV–vis–near-infrared spectroscopy, nanoparticle tracking analysis, and transmission electron microscopy measurements were used to characterize the PEI/surfactant/gold nanoassemblies. The results indicate the formation of gold NPs surrounded by a PEI/surfactant shell with composition-dependent charge and hydrophobicity. The mean size and the aggregation of the nanoassemblies can be fine tuned by the amount of surfactant bound to the primary gold NPs as well as by the application of controlled mixing methods. The specific features of the prepared nanocomposites may be further exploited in next-generation applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Preparation of Gold Nanocomposites with Tunable Charge and Hydrophobicity via the Application of Polymer/Surfactant Complexation

et al. 2017

View full text Add to dashboard Cite

show abstract

“…In earlier studies, Koetz and others have used polyelectrolytes as reducing as well as stabilizing agents in surfactant stabilized mini/microemulsion templates. [5][6][7] The polyelectrolyte modied, surfactant stabilized microemulsions were successfully used as a template to control the size and shape of the nanoparticles during the formation process. For instance, the cationic polyelectrolyte poly(diallyldimethylammonium chloride) (PDADMAC) incorporated microemulsion droplets were used as reactors for the synthesis of BaSO 4 nanoparticles with different shapes and sizes.…”

mentioning

confidence: 99%

Building triangular nanoprisms from the bottom-up: a polyelectrolyte micellar approach

Ding¹,

Lin²,

Yao³

et al. 2013

J. Mater. Chem. B

View full text Add to dashboard Cite

“…38 Additionally, Koẗh et al, 2012, proposed a possible mechanism for the GNT formation in the aqueous phase by the preferential absorption of vesicles on the crystal facets. 23 The authors argued that first crystalline seeds are formed. Then, the nuclei continue growing into thin plates, whose top and bottom surfaces are composed by {111} facets.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Our approach is inspired by the central role played by the liposomes as a template that directs the nanoparticle (NP) growth and the stabilization that is provided by the surface charge as well as their biocompatible, 20 bioadhesion, 21 and biodegradable 22 properties. Although extensive studies have emerged on the GNT synthesis exploiting the template phase method, 23,24 there is still no precise control on the NP shape. In consequence, synthetic reagents (sometimes, they might be very toxic) are used for shape and size control, limiting the biocompatibility of the final NPs.…”

Section: ■ Introductionmentioning

confidence: 99%

Biofabrication of Gold Nanotriangles Using Liposomes as a Dual Functional Reductant and Stabilizer

et al. 2021

View full text Add to dashboard Cite

Negatively charged liposomes accomplished both functions as a reducing and stabilizing agent in the synthesis of gold nanotriangles (GNTs). Liposomes are based on a mixture of phospholipids phosphatidylcholine/phosphoglycerol, and they were used as a template phase to perform the GNTs. The method was evaluated under different conditions such as temperature, reaction time, phosphoglycerol chain length, and precursor concentration. Isotropic and anisotropic gold nanoparticles are formed simultaneously during the synthesis. Therefore, by combining centrifugation and depletion flocculation strategies, the sample was concentrated in terms of GNTs from 15% crude to 80% by using sodium dodecyl sulfate (SDS). As a result, a green colored dispersion was obtained containing highly purified, well-defined, negatively charged GNTs, where the edge length of most particles is centered in the range of 60–80 nm with an average thickness of 7.8 ± 0.1 nm. By this purification process, it was possible to highly increase the yield in terms of GNTs. Other surfactants [cetyltrimethylammonium chloride (CTAC), hexadecyltrimethylammonium bromide (CTAB), Tween 20, and dodecyldimethylammonium bromide] were evaluated during the purification stage, and both CTAB and CTAC show similar results to those obtained by using SDS. These GNTs are potential candidates for future applications in molecular imaging, photothermal therapy, drug delivery, biosensing, and photodynamic therapy.

show abstract

Asymmetric gold nanoparticles synthesized in the presence of maltose-modified poly(ethyleneimine)

Cited by 18 publications

References 59 publications

Preparation of Gold Nanocomposites with Tunable Charge and Hydrophobicity via the Application of Polymer/Surfactant Complexation

Preparation of Gold Nanocomposites with Tunable Charge and Hydrophobicity via the Application of Polymer/Surfactant Complexation

Building triangular nanoprisms from the bottom-up: a polyelectrolyte micellar approach

Biofabrication of Gold Nanotriangles Using Liposomes as a Dual Functional Reductant and Stabilizer

Contact Info

Product

Resources

About