Crystallization of DNA‐Capped Gold Nanoparticles in High‐Concentration, Divalent Salt Environments

Tan, Shawn J.; Kahn, Jason S.; Derrien, Thomas; Campolongo, Michael J.; Zhao, Mervin; Smilgies, Detlef‐M.; Luo, Dan

doi:10.1002/anie.201307113

Cited by 47 publications

(45 citation statements)

References 28 publications

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“…In one approach, charged Langmuir monolayers have been used as templates that attract and crystallize capped nanoparticles from solutions [5][6][7]. In a different approach, it has been found that by manipulating salt concentrations in NPs suspensions, a Gibbs-like monolayer can be spontaneously formed and crystallized [8][9][10]. It should be emphasized that for all these assemblies, 2D or 3D, salts play a decisive role in tweaking the charge of the DNA strands and facilitate specific 3D assembly of NPs or migration of NPs to the liquid interface [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…In a different approach, it has been found that by manipulating salt concentrations in NPs suspensions, a Gibbs-like monolayer can be spontaneously formed and crystallized [8][9][10]. It should be emphasized that for all these assemblies, 2D or 3D, salts play a decisive role in tweaking the charge of the DNA strands and facilitate specific 3D assembly of NPs or migration of NPs to the liquid interface [5][6][7][8][9][10]. In fact, a recent study suggests that the underlying mechanism that drives DNA-capped AuNPs to the surface and to crystallization has to do with the role of salt in tweaking the hydrophobic-hydrophilic character of the DNA-capped AuNPs [10].…”

Section: Introductionmentioning

confidence: 99%

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Ionic depletion at the crystalline Gibbs layer of PEG-capped gold nanoparticle brushes at aqueous surfaces

Wang

Zhang

Mallapragada

et al. 2017

Phys. Rev. Materials

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In situ surface-sensitive x-ray diffraction and grazing incidence x-ray fluorescence spectroscopy (GIXFS) methods are combined to determine the ionic distributions across the liquid/vapor interfaces of thiolatedpolyethylene-glycol-capped gold nanoparticle (PEG-AuNP) solutions. Induced by the addition of salts (i.e., Cs2SO4) to PEG-AuNPs solutions, two-dimensional hexagonal lattices of PEG-AuNPs form spontaneously at the aqueous surfaces, as is demonstrated by x-ray reflectivity and grazing incidence small-angle x-ray scattering. By taking advantage of element specificity with the GIXFS method, we find that the cation Cs+ concentration at the crystalline film is significantly reduced in parts of the PEG-AuNP film compared with that in the bulk. DisciplinesCondensed Matter Physics | Nanoscience and Nanotechnology In situ surface-sensitive x-ray diffraction and grazing incidence x-ray fluorescence spectroscopy (GIXFS) methods are combined to determine the ionic distributions across the liquid/vapor interfaces of thiolatedpolyethylene-glycol-capped gold nanoparticle (PEG-AuNP) solutions. Induced by the addition of salts (i.e., Cs 2 SO 4 ) to PEG-AuNPs solutions, two-dimensional hexagonal lattices of PEG-AuNPs form spontaneously at the aqueous surfaces, as is demonstrated by x-ray reflectivity and grazing incidence small-angle x-ray scattering. By taking advantage of element specificity with the GIXFS method, we find that the cation Cs + concentration at the crystalline film is significantly reduced in parts of the PEG-AuNP film compared with that in the bulk.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ionic depletion at the crystalline Gibbs layer of PEG-capped gold nanoparticle brushes at aqueous surfaces

Wang

Zhang

Mallapragada

et al. 2017

Phys. Rev. Materials

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“…Assembling nanoparticles (NPs) into superlattices with specific symmetries is crucial for applications such as catalysis, optical devices, sensors, and energy storage . Although there has been considerable progress in assembling 2D and 3D superlattices of metallic and semiconductor NPs, the challenge of up‐scaling and stabilizing these crystals still remains . In this regard, self‐assembly of NPs driven by interparticle and thermodynamic forces has proven to be a promising approach for the formation of macroscale ordered assemblies …”

mentioning

confidence: 99%

Ordered Networks of Gold Nanoparticles Crosslinked by Dithiol‐Oligomers

Nayak

Horst

Zhang

et al. 2018

Part & Part Syst Charact

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Controlled aggregation of nanoparticles into superlattices is a grand challenge in material science, where ligand based self‐assembly is the dominant route. Here, the self‐assembly of gold nanoparticles (AuNPs) that are crosslinked by water soluble oligo‐(ethylene glycol)‐dithiol (oEG‐dithiol) is reported and their 3D structure by small angle X‐ray scattering is determined. Surprisingly, a narrow region is found in the parameter space of dithiol linker‐length and nanoparticle size for which the crosslinked networks form short‐ranged FCC crystals. Using geometrical considerations and numerical simulations, the stability of the formed lattices is evaluated as a function of dithiol length and the number of connected nearest‐neighbors, and a phase diagram of superlattice formation is provided. Identifying the narrow parameter space that allows crystallization facilitates focused exploration of linker chemical composition and medium conditions such as thermal annealing, pH, and added solutes that may lead to superior and more robust crystals.

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“…For DNA nanotechnology, DNA is always treated as a kind of polymer with four different units (GCAT) randomly coded along the chain . So its physical behavior is sensitive to the details of the design and surrounding environments . In order to form highly ordered lattices, careful design of DNA shells are requisite .…”

Section: Dynamic Superlatticesmentioning

confidence: 99%

“…Moreover, they can help to determine the types and symmetries of the lattices . Researchers investigated a series of factors which could induce the variation of DNA chains bridged between two nanoparticle cores, including ligand length, ionic strength, the interaction between the particles, and so on, in order to fulfill one goal: dynamic control over the behaviors of superlattices.…”

Section: Dynamic Superlatticesmentioning

confidence: 99%

3D Lattice Engineering of Nanoparticles by DNA Shells

Tian

2019

Small

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With the development of structural DNA nanotechnology, DNA has now far exceeded its original function: as a genetic code. It can, in principle, self‐assemble into desired shapes with accurate size. Moreover, it can perform as a functional linker to program other materials by grafting DNA onto these materials. Nanoparticles, both inorganic and organic, can now be programmatically assembled into complex 3D superlattices with high order when guided by DNA. By encoding functions into the as‐assembled nanoparticles, materials with excellent collective effects may be invented. Here, how nanoparticles with different shapes or functions are successfully fabricated into 3D lattices with the help of DNA shells coated on the surface and how scientists can produce desired lattices by design are reviewed. The cases to achieve dynamic superlattices of nanoparticles by affecting the environment where DNA survives are also discussed.

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Crystallization of DNA‐Capped Gold Nanoparticles in High‐Concentration, Divalent Salt Environments

Cited by 47 publications

References 28 publications

Ionic depletion at the crystalline Gibbs layer of PEG-capped gold nanoparticle brushes at aqueous surfaces

Ionic depletion at the crystalline Gibbs layer of PEG-capped gold nanoparticle brushes at aqueous surfaces

Ordered Networks of Gold Nanoparticles Crosslinked by Dithiol‐Oligomers

3D Lattice Engineering of Nanoparticles by DNA Shells

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