Self-assembly of length-tunable gold nanoparticle chains in organic solvents

Liao, Junlong; Chen, K.J.; Xu, Lina; Ge, Cunwang; Wang, J.; Huang, Lan; Gu, Ning

doi:10.1007/s00339-002-1716-x

Cited by 40 publications

(21 citation statements)

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“…If compared with AuNP assemblies induced by small organic molecules or organic solvents no such defined spacing between NPs can be observed 16,38 . Assuming a rigid gold sphere with perfect spherical shape of r AuNP ¼ 5 nm with x ¼ 2 nm as the radius of the void inner cavity of the Hcp1_cys3 protein ring, a maximal penetration distance of the sphere into the protein ring is calculated to be 0.42 nm (for details see Supplementary Note 2).…”

Section: Resultsmentioning

confidence: 99%

Molecular protein adaptor with genetically encoded interaction sites guiding the hierarchical assembly of plasmonically active nanoparticle architectures

et al. 2015

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The control over the defined assembly of nano-objects with nm-precision is important to create systems and materials with enhanced properties, for example, metamaterials. In nature, the precise assembly of inorganic nano-objects with unique features, for example, magnetosomes, is accomplished by efficient and reliable recognition schemes involving protein effectors. Here we present a molecular approach using protein-based 'adaptors/ connectors' with genetically encoded interaction sites to guide the assembly and functionality of different plasmonically active gold nanoparticle architectures (AuNP). The interaction of the defined geometricaly shaped protein adaptors with the AuNP induces the self-assembly of nanoarchitectures ranging from AuNP encapsulation to one-dimensional chain-like structures, complex networks and stars. Synthetic biology and bionanotechnology are applied to co-translationally encode unnatural amino acids as additional site-specific modification sites to generate functionalized biohybrid nanoarchitectures. This protein adaptor-based nanoobject assembly approach might be expanded to other inorganic nano-objects creating biohybrid materials with unique electronic, photonic, plasmonic and magnetic properties.

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Section: Resultsmentioning

confidence: 99%

Molecular protein adaptor with genetically encoded interaction sites guiding the hierarchical assembly of plasmonically active nanoparticle architectures

et al. 2015

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“…Most of the silver nanoparticles were less than 40 nm in size and the average diameter of the silver nanoparticles was 33.33 ± 19.01 nm. In water, asymmetrical charge distribution on surface of metal nanoparticles may be counteracted by dissociated water and metal nanoparticles may be hindered in their aggregation (Liao et al, 2003;Tilaki, Zad, & Mahdavi, 2006). Silver nanoparticles in this study were in water and the aggregation of silver nanoparticles would be also hindered.…”

Section: Characterization Of the Treated Cotton Fibersmentioning

confidence: 95%

Antibacterial cotton fibers treated with silver nanoparticles and quaternary ammonium salts

Kang¹,

Kim

et al. 2016

Carbohydrate Polymers

109

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“…Such behavior was observed in all types of material, including metals and oxides. [28][29][30] Tang et al [30] in their article on the one-dimensional assembly of nanoparticles indicated several driving forces that can lead to template-free self-assembly forming chain-like agglomeration. Out of these, magnetic dipole moments and crystallographically oriented agglomeration are relevant to LGC.…”

Section: Discussionmentioning

confidence: 98%

Synthesis of FeCu Nanopowder by Levitational Gas Condensation Process

Sivaprahasam

Sriramamurthy

Vijayakumar

et al. 2010

Metall Mater Trans B

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Condensation from the vapor state is an important technique for the preparation of nanopowders. Levitational gas condensation is one such technique that has a unique ability of attaining steady state. Here, we present the results of applying this technique to an iron-copper alloy (96Fe-4Cu). A qualitative model of the process is proposed to understand the process and the characteristics of resultant powder. A phase diagram of the alloy system in the liquid-vapor region was calculated to help understand the course of condensation, especially partitioning and coring during processing. The phase diagram could not explain coring in view of the simultaneous occurrence of solidification and the fast homogenization through diffusion in the nanoparticles; however, it could predict the very low levels of copper observed in the levitated drop. The enrichment of copper observed near the surface of the powder was considered to be a manifestation of the lower surface energy of copper compared with that of iron. Heat transfer calculations indicated that most condensed particles can undergo solidification even when they are still in the proximity of the levitated drop. It helped us to predict the temperature and the cooling rate of the powder particles as they move away from the levitated drop. The particles formed by the process seem to be single domain, single crystals that are magnetic in nature. They, thus, can agglomerate by forming a chain-like structure, which manifests as a threedimensional network enclosing a large unoccupied space, as noticed in scanning electron microscopy and transmission electron microscopy studies. This also explains the observed low packing density of the nanopowders.

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Self-assembly of length-tunable gold nanoparticle chains in organic solvents

Cited by 40 publications

References 0 publications

Molecular protein adaptor with genetically encoded interaction sites guiding the hierarchical assembly of plasmonically active nanoparticle architectures

Molecular protein adaptor with genetically encoded interaction sites guiding the hierarchical assembly of plasmonically active nanoparticle architectures

Antibacterial cotton fibers treated with silver nanoparticles and quaternary ammonium salts

Synthesis of FeCu Nanopowder by Levitational Gas Condensation Process

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