A one-dimensional network from the self-assembly of gold nanoparticles by a necklace-like polyelectrolyte template mediated by metallic ion coordination

Zhang, Jia; Wang, Juan; Xu, Xiaowen; Zhu, Hui; Wang, Zhongjun; Zhang, Bailin; Yang, Xiurong

doi:10.1088/0957-4484/20/29/295603

Cited by 5 publications

(5 citation statements)

References 34 publications

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“…We used noble metal nanoparticles to obtain a multivalent display as these nanoparticles are increasingly being used for a variety of applications that include cancer imaging , , self-assembled nano/microstructures , , targeted delivery , , and antiadhesives . Glycan encapsulated gold nanoparticles (GNP) are excellent biomaterials as they offer a multivalent display of glycans similar to the glycocalyx structures covering the surface of cells.…”

Section: Introductionmentioning

confidence: 99%

Glycan Encapsulated Gold Nanoparticles Selectively Inhibit Shiga Toxins 1 and 2

et al. 2010

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Shiga toxins (Stx) released by Escherichia coli O157:H7 and Shigella dysentriae, cause lifethreatening conditions that include hemolytic-uremic syndrome (HUS), kidney failure and neurological complications. Cellular entry is mediated by the B subunit of the AB5 toxin, which recognizes cell surface glycolipids present in lipid raft like structures. We developed gold glyconanoparticles that present a multivalent display similar to the cell surface glycolipids to compete for these toxins. These highly soluble glyconanoparticles were nontoxic to the Vero monkey kidney cell line and protected Vero cells from Stx-mediated toxicity in a dose dependent manner. The inhibition is highly dependent on the structure and density of the glycans; selective inhibition of Stx1 and the more clinically relevant Stx2 was achieved. Interestingly, natural variants of Stx2, Stx2c and Stx2d, possessing minimal amino acid variation in the receptor binding site of the B subunit or changes in the A subunit were not neutralized by either the Stx1-or Stx2-specific gold glyconanoparticles. Our results suggest that tailored glyconanoparticles that mimic the natural display of glycans in lipid rafts could serve as potential therapeutics for Stx1 and Stx2. However, a few amino acid changes in emerging Stx2 variants can change receptor specificity, and further research is needed to develop receptor mimics for the emerging variants of Stx2.

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Section: Introductionmentioning

confidence: 99%

Glycan Encapsulated Gold Nanoparticles Selectively Inhibit Shiga Toxins 1 and 2

et al. 2010

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“…A popular way to achieve 1D necklace-like nanostructures is to utilize the self-assembly behaviors of building blocks (i.e., spherical NPs, nanodisks, and nanorods) based on their intrinsic interactions, such as hydrogen-bonding, [39,41,[96][97][98] hydrophobic interaction, [99,100] host-guest interaction, [101][102][103] dipole-dipole attraction, [55,56,104] and electrostatic interactions, [17,42,43,[105][106][107][108] or by external fields, [11,20,40,[109][110] and solvent effect [111][112][113][114][115][116][117] (Scheme 2).…”

Section: Self-assemblymentioning

confidence: 99%

Necklace‐Like Nanostructures: From Fabrication, Properties to Applications

et al. 2022

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or loop shapes. The particles (i.e., building blocks) could be spherical spheres, cubes, rods, disks, bipyramids, etc. Another type of NNs are formed when the particles are connected by linkers or threaded onto a string or stem (type II). The strings or stems could be polymer chains, nanowires, nanorods, nanotubes, nanobelts, etc. The third type of NNs is comprised of particles that are deposited on a robust support to form a periodic arrangement that resembles a necklace (type III). The supports could be polymers, nanorods, nanotubes, nanofibers, etc.Although these three types of necklacelike nanostructures are quite different from each other in shape and morphology, they all possess some common features, such as intrinsic high surface area, abundant transport channels, exposure of each component to the surface, and multiscale roughness of the surface (as compared to other 1D nanogeometries such as rods, wires, fibers, tubes, and belts). Most type I necklace-like nanostructures are discontinuous structures that consist of 1D aligned building blocks. The interparticle distance between the building blocks is crucial to the properties of the necklace-like nanostructures. When the interparticle distance is sufficiently short, coherent optical properties are obtained through near-field coupling of their surface plasmon resonances. [11] Additionally, electromagnetic coupling between isolated nanoparticles (NPs) is much lower than the electromagnetic interactions between NPs in close proximity in a necklace-like nanostructure. [12] The static electromagnetic interactions between neighboring metallic NPs in necklacelike nanostructures may contribute to an enhancement of nonlinear optical properties and surface-enhanced Raman scattering (SERS) effect. For type II necklace-like nanostructures, the bead-on-string architecture may provide facile electron transfer and percolation, an open scaffold for ion accessibility, maximized surface area to volume ratio, and good strain tolerance, all of which are highly conducive to energy storage. [13] For type III necklace-like nanostructures, the percolating clusters of metallic or semiconductor NPs show different electrical properties because of their interparticle electron transport. [14] Thus, decorating metallic or semiconductor NPs over a robust support to form necklace-like structures is a promising strategy to craft single-electron devices. [15] Notably, NNs possess a unique surface morphology that is distinctly different from the smooth surface of nanorods, nanotubes, and nanowires. Necklace-like structures possess multiscale roughness, which renders themThe shape-controlled synthesis of nanocrystals remains a hot research topic in nanotechnology. Particularly, the fabrication of 1D structures such as wires, rods, belts, and tubes has been an interesting and important subject within nanoscience in the last few decades. 1D necklace-like micro/nanostructures are a sophisticated geometry that has attracted increasing attention due to their anisotropic and periodic structure, in...

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“…Metal nanoparticle networks can be generated using selected combinations of ligands and metal ions as in the case of peptide and 3-mercaptopropionic acid functionalized gold nanoparticles with mercuric and cupric ions respectively. 15,16 Examples of template-mediated network formations include the DNA-directed assembly of trimethyl(mercaptoundecyl)ammonium monolayer coated gold nanoparticles 17 and the organization of gold nanoparticles on peptide nanofibers 18,19 and polyelectrolytes. 16,20 An interesting case of nanoparticle network formation exploits dielectrophoresis forces induced by a non-uniform electric field.…”

Section: Introductionmentioning

confidence: 99%

“…15,16 Examples of template-mediated network formations include the DNA-directed assembly of trimethyl(mercaptoundecyl)ammonium monolayer coated gold nanoparticles 17 and the organization of gold nanoparticles on peptide nanofibers 18,19 and polyelectrolytes. 16,20 An interesting case of nanoparticle network formation exploits dielectrophoresis forces induced by a non-uniform electric field. 21 The Langmuir-Blodgett (LB) technique commonly used to fabricate mono and multilayer films of amphiphilic molecules, through steered rather than self-assembly, can be used to organize metal nanoparticles and nanowires in ultrathin films.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle assembly following Langmuir–Hinshelwood kinetics on a Langmuir film and chain networks captured in LB films

Maganti

Jash

Nair

et al. 2015

Phys. Chem. Chem. Phys.

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The Langmuir-Blodgett (LB) technique is an elegant protocol for the steered assembly of metal nanoparticles, the deposition pressure serving as a convenient parameter to tune the assembly. Adsorption of nanoparticles from the subphase to the air-water interface can provide further control of the process. Citrate-stabilized gold nanoparticles in the aqueous subphase are shown to assemble into extended 2-dimensional chain networks following adsorption on a cationic amphiphile Langmuir film at the air-water interface. Kinetic investigations show that the process can be visualized as a surface-catalyzed reaction and explained in terms of the Langmuir-Hinshelwood mechanism. The LB deposition proves to be a unique route to capture the reaction product together with the amphiphile film. The deposition pressure is used to tune the density of nanoparticle chain networks in the LB film, and their optical extinction spectrum. The unusual blue shift of the extinction observed with increasing deposition pressure is attributed to the impact of the amphiphile monolayer environment. The extent of formation of the chain network is analyzed in terms of the pathways in the corresponding graph representation, and shown to scale with the deposition pressure. The current investigation highlights the use of a charged monolayer as a heterogeneous catalyst surface, provides fundamental insight into the kinetics of nanoparticle assembly at interfaces, and demonstrates the utility of the LB technique in tuning the formation of 2-dimensional nanoparticle chain networks.

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A one-dimensional network from the self-assembly of gold nanoparticles by a necklace-like polyelectrolyte template mediated by metallic ion coordination

Cited by 5 publications

References 34 publications

Glycan Encapsulated Gold Nanoparticles Selectively Inhibit Shiga Toxins 1 and 2

Glycan Encapsulated Gold Nanoparticles Selectively Inhibit Shiga Toxins 1 and 2

Necklace‐Like Nanostructures: From Fabrication, Properties to Applications

Nanoparticle assembly following Langmuir–Hinshelwood kinetics on a Langmuir film and chain networks captured in LB films

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