Seed-mediated biomineralizaton toward the high yield production of gold nanoprisms

Geng, Xi; Roth, Kristina L.; Freyman, Megan C.; Liu, Jianzhao; Grove, Tijana Ž.

doi:10.1039/c6cc04708d

Cited by 8 publications

(4 citation statements)

References 54 publications

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“…Their use has resulted in the synthesis of cuboctahedrons, , octahedrons, , nanocubes, , tetrahexahedrons, core–shell, , nanoshell, core–void–shell, and dimer structures . By establishing a protocol for the synthesis of seeds lined with planar defects, it should prove possible to adapt other prominent colloidal Au nanoplate protocols ,,,− to the substrate surface. This work should also significantly expand the breadth of nanostructure architectures accessible to the substrate platform because planar structures with variable shape, a bimetallic character, and which use nanoplates as a starting template for the generation of more sophisticated structures − may now be synthetically viable.…”

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confidence: 99%

Plasmon-Mediated Synthesis of Periodic Arrays of Gold Nanoplates Using Substrate-Immobilized Seeds Lined with Planar Defects

et al. 2019

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The seed-mediated growth of noble metal nanostructures with planar geometries requires the use of seeds lined with parallel stacking faults so as to provide a break in symmetry in an otherwise isotropic metal. Although such seeds are now routinely synthesized using colloidal pathways, equivalent pathways have not yet been reported for the fabrication of substrate-based seeds with the same internal defect structures. The challenge is not merely to form seeds with planar defects but to do so in a deterministic manner so as to have stacking faults that only run parallel to the substrate surface while still allowing for the lithographic processes needed to regulate the placement of seeds. Here, we demonstrate substrate-imposed epitaxy as a viable synthetic control able to induce planar defects in Au seeds while simultaneously dictating nanostructure in-plane alignment and crystallographic orientation. The seeds, which are formed in periodic arrays using nanoimprint lithography in combination with a vapor-phase assembly process, are subjected to a liquid-phase plasmon-mediated synthesis that uses light as an external stimuli to drive a reaction yielding periodic arrays of hexagonal Au nanoplates. These achievements not only represent the first of their kind demonstrations but also advance the possibility of integrating wafer-based technologies with a rich and exciting nanoplate colloidal chemistry.

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confidence: 99%

Plasmon-Mediated Synthesis of Periodic Arrays of Gold Nanoplates Using Substrate-Immobilized Seeds Lined with Planar Defects

et al. 2019

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“…Grove et al . gained AuTNPs with high yield by combining seed‐mediated method and biomineralization together for the first time [56] . This method involved consensus sequence tetrapeptide repeat (CTPR) protein, Br − , 3‐( N ‐morpholine)propanesulfonic acid (MOPS) and CTPR‐stabilized silver seed, where MOPS was the reducing agent, CTPR and Br − were the shape guiding agents.…”

Section: Synthetic Methodologymentioning

confidence: 99%

“…Grove et al gained AuTNPs with high yield by combining seedmediated method and biomineralization together for the first time. [56] This method involved consensus sequence tetrapeptide repeat (CTPR) protein, Br À , 3-(N-morpholine)propanesulfonic acid (MOPS) and CTPR-stabilized silver seed, where MOPS was the reducing agent, CTPR and Br À were the shape guiding agents. In the absence of Br À , the products were dominated by AuNSs due to the self-induced nucleation process that could be circumvent by the innate planar twinning structure of CTPRstable silver seeds.…”

Section: Seed-mediated Methodsmentioning

confidence: 99%

Gold Triangular Nanoprisms: Anisotropic Plasmonic Materials with Unique Structures and Properties

2023

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As a novel type of anisotropic inorganic nanomaterials, gold triangular nanoprisms (AuTNPs) have been widely studied for their well‐defined structures and excellent plasmonic properties. This review starts with synthetic methodology, combing through the early thermal solution method to the mature seed‐mediated method and seedless method. The possible mechanisms proposed by predecessors and the problems needed to be solved are also arranged. Along with this, the important morphological evolution process of AuTNPs during synthesis and post‐synthesis stages are revealed, which is of great significance for further understanding the structure of AuTNPs and developing new synthesis strategies. Finally, the applications of AuTNPs, especially associated with plasmonic properties, are listed and summarized where surface‐enhanced Raman scattering (SERS), catalysis, phototherapy and biosensor are included, so that researchers can quickly comprehend the current situation, and provide a basis for further development and exploration of AuTNPs.

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“…By far the most successful approach to gold NPrs [8][9][10][11] involves the use of cytotoxic surfactants cetyltrimethylammonium bromide (CTAB) or chloride (CTAC), but their toxicity is a serious limitation for applications involving direct contact of the material with healthy tissues [12]. CTAB-free preparation of gold NPrs typically involves mild reducing conditions in combination with a directing agent which can be other surfactants, synthetic [13][14][15][16][17][18] or natural [19] polymers, liquid crystals [20], or alkaline halides [21]. Spherical nanoparticle side-product should be removed since they consume precious active or vectorization molecules when bioconjugation steps are required and the presence of more particles could lead to a greater immune response and increase of toxicity.…”

Section: Introductionmentioning

confidence: 99%

Surfactant-Free Synthesis and Scalable Purification of Triangular Gold Nanoprisms with Low Non-Specific Cellular Uptake

et al. 2020

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Gold nanoprisms possess remarkable optical properties that make them useful for medical biotechnology applications such as diagnosis and photothermal therapy. However, shape-selective synthesis of gold nanoprisms is not trivial and typically requires either toxic surfactants or time-consuming purification protocols, which can limit their applicability. Here, we show how triangular gold nanoprisms of different sizes can be purified by precipitation using the non-toxic glutathione ligand, thereby removing the need for toxic surfactants and bottleneck purification techniques. The protocol is amenable for direct scaling up as no instrumentation is required in the critical purification step. The new purification method provides a two-fold increased yield in gold nanoprisms compared to electrophoretic filtration, while providing nanoprisms of similar localized surface plasmon resonance wavelength. Crucially, the gold nanoprisms isolated using this methodology show fewer non-specific interactions with cells and lower cellular internalization, which paves the way for a higher selectivity in therapeutic applications.

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Seed-mediated biomineralizaton toward the high yield production of gold nanoprisms

Cited by 8 publications

References 54 publications

Plasmon-Mediated Synthesis of Periodic Arrays of Gold Nanoplates Using Substrate-Immobilized Seeds Lined with Planar Defects

Plasmon-Mediated Synthesis of Periodic Arrays of Gold Nanoplates Using Substrate-Immobilized Seeds Lined with Planar Defects

Gold Triangular Nanoprisms: Anisotropic Plasmonic Materials with Unique Structures and Properties

Surfactant-Free Synthesis and Scalable Purification of Triangular Gold Nanoprisms with Low Non-Specific Cellular Uptake

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