The Effect of Membrane Charge on Gold Nanoparticle Synthesis via Surfactant Membranes

Markowitz, Michael A.; Dunn, Derren; Chow, Gan Moog; Zhang, Jin

doi:10.1006/jcis.1998.5932

Cited by 26 publications

(21 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Again micelles sometime refresh the surfaces of catalyst particles [55,56,58], and are used in various ratios to control the particle shape and size [59]. However, the exact mechanism of interaction between metal particles and the surfactant stabilizer has not yet been resolved [60,61].…”

Section: Studies In Micellesmentioning

confidence: 99%

Photochemical deposition of SERS active silver nanoparticles on silica gel and their application as catalysts for the reduction of aromatic nitro compounds

Kundu

Mandal

Ghosh

et al. 2004

Journal of Colloid and Interface Science

123

View full text Add to dashboard Cite

Section: Studies In Micellesmentioning

confidence: 99%

Photochemical deposition of SERS active silver nanoparticles on silica gel and their application as catalysts for the reduction of aromatic nitro compounds

Kundu

Mandal

Ghosh

et al. 2004

Journal of Colloid and Interface Science

123

View full text Add to dashboard Cite

“…Moreover, to examine the internalization of vesicles inside the cell, the presence of metal nanoparticles, such as highly electron dense gold nanoparticles (GNPs) within vesicles, will be effective as it can be easily followed by electron microscopy 13–16. In this context, synthesis of GNPs in vesicles in a mild process without using any external reducing agent17 is always preferred. To the best of our knowledge, amino acid‐based cationic surfactants capable of forming vesicles spontaneously have not yet been used to obtain GNP‐containing vesicles.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous Formation of Biocompatible Vesicles in Aqueous Mixtures of Amino Acid‐Based Cationic Surfactants and SDS/SDBS

2010

View full text Add to dashboard Cite

The spontaneous formation of vesicles by six amino acid-based cationic surfactants and two anionic surfactants (sodium dodecylbenzene sulfonate (SDBS) and sodium dodecyl sulfate (SDS)) is reported. The head-group structure of the cationic surfactants is minutely altered to understand their effect on vesicle formation. To establish the regulatory role of the aromatic group in self-aggregation, both aliphatic and aromatic side-chain-substituted amino acid-based cationic surfactants are used. The presence of aromaticity in any one of the constituents favors the formation of vesicles by cationic/anionic surfactant mixtures. The formation of vesicles is primarily dependent on the balance between the hydrophobicity and hydrophilicity of both cationic and anionic surfactants. Vesicle formation is characterized by surface tension, fluorescence anisotropy, transmission electron microscopy, dynamic light scattering, and phase diagrams. These vesicles are thermally stable up to 65 °C, determined by temperature-dependent fluorescence anisotropy. According to the MTT assay, these catanionic vesicles are nontoxic to NIH3T3 cells, thus indicating their wider applicability as delivery vehicles to cells. Among the six cationic surfactants examined, tryptophan- and tyrosine-based surfactants have the ability to reduce HAuCl(4) to gold nanoparticles (GNPs), which is utilized to obtain in-situ-synthesized GNPs entrapped in vesicles without the need for any external reducing agent.

show abstract

“…22 One approach for controlling biocompatibility is the use of green synthetic methods such as selecting benign reagents from renewable sources. [23][24][25][26] A common method of preparing biocompatible nanoparticles is to use biogenic extracts as has been done with lemongrass, 27 tea leaves, 24 and pears. 28 This approach is particularly promising for nanomaterials being developed for biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

A minor lipid component of soy lecithin causes growth of triangular prismatic gold nanoparticles

Ayres

Reed

2014

Environ. Sci.: Nano

View full text Add to dashboard Cite

Reduction of bromoauric acid by ascorbic acid in the presence of crude soybean lecithin produced a mixture of spherical and triangular prismatic nanoparticles while higher purity phosphatidylcholine (PC) produced only spherical nanoparticles. The triangular prismatic nanoparticles made with lecithin had an average edge length of 90 nm and a localized surface plasmon resonance between 700 and 1050 nm, depending on the synthetic conditions used. Although crude soy lecithin is composed of 75% PC and phosphatidylethanolamine, additional lipids and other small molecules are present. Preparatory gel electrophoresis was used to separate the different nanoparticle shapes and phosphatidic acid (PA) was identified as bound to the triangular prismatic nanoparticles by mass spectrometry of the gel-purified nanoprisms. Furthermore, PA proved essential to the asymmetric growth. When bromoauric acid was reduced by ascorbic acid using a mixture of pure PA and pure PC, triangular prismatic gold nanoparticles also resulted, confirming the role of PA and providing a second route to these near infrared active nanoparticles. Nanoparticles prepared in soy lecithin or PA-PC mixtures exhibited extended stability with no aggregation after months of storage, in contrast to nanoparticles prepared in pure PC. These nanoparticles were prepared without the use of the alkyl ammonium salts that have limited in vivo applications with other asymmetric gold nanoparticles. This is a versatile synthetic method providing stable, shape-controlled gold nanoparticles using a mild reducing agent and soy lecithin as an environmentally benign ligand source. Nano impactPlant-derived lipids have the potential to function as versatile, environmentally benign ligands for nanoparticle synthesis, although the complex chemistry of the lipids must be understood in order to use them effectively. This work adds to the growing list of nanoparticle syntheses performed using renewable, plant-derived ligands in place of fossil fuel derived chemicals. This synthetic route provides control over the shape and the optical properties of the gold nanoparticles, making the resultant materials useful for biomedical, catalytic, and photonic applications. One critical impact of this work comes from the identification of a specific molecular component in soy lecithin that is responsible for causing asymmetric growth. Through this molecular level understanding it becomes possible to optimize the nanoparticle synthesis both from the perspective of the desired application of the nanoparticles and from the perspective of the environmental impact of their synthesis.

show abstract

The Effect of Membrane Charge on Gold Nanoparticle Synthesis via Surfactant Membranes

Cited by 26 publications

References 57 publications

Photochemical deposition of SERS active silver nanoparticles on silica gel and their application as catalysts for the reduction of aromatic nitro compounds

Photochemical deposition of SERS active silver nanoparticles on silica gel and their application as catalysts for the reduction of aromatic nitro compounds

Spontaneous Formation of Biocompatible Vesicles in Aqueous Mixtures of Amino Acid‐Based Cationic Surfactants and SDS/SDBS

A minor lipid component of soy lecithin causes growth of triangular prismatic gold nanoparticles

Contact Info

Product

Resources

About