DNA-directed self-assembly of gold nanoparticles into binary and ternary nanostructures

Yao, Huaxiong; Yi, Changqing; Tzang, Chi-Hung; Zhu, Jun‐Jie; Yang, Mengsu

doi:10.1088/0957-4484/18/1/015102

Cited by 68 publications

(75 citation statements)

References 37 publications

(72 reference statements)

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“…1. The first stage of the process was adapted from the work of Yao et al 44 and is necessary to form the base of the 3D nanostructures. The same procedure was followed for all oligonucleotide strands to form nanoparticles functionalized with strands of the necessary oligonucleotide, which we label as S1, S3 and S4.…”

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confidence: 99%

The surface plasmon modes of self-assembled gold nanocrystals

et al. 2012

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The three-dimensional (3D) self-assembly of nanocrystals constitutes one of the most important challenges in materials science. A key milestone is the synthesis of simple, regular structures, such as platonic solids, composed of nanocrystal building blocks. Such objects are predicted to have unique optical and electronic properties such as polarization-independent light-scattering and intense local fields. Here we present a two-stage process for fabricating well-defined and highly symmetric, 3D gold nanocrystal structures, including tetrahedra, 3D pentamers and 3D hexamers. Polarized scattering spectra are used to elucidate the plasmon modes present in each structure, and these are compared with computational models. We conclude that self-assembly of highly symmetric, polarization-independent structures with interparticle spacings of order 0.5 nm can now be fabricated. Drastically, enhanced local fields, 1000 times higher than the incident field strength, are produced within the interstices. Fano resonances are generated if the symmetry is broken.

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confidence: 99%

The surface plasmon modes of self-assembled gold nanocrystals

et al. 2012

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“…The TEM images clearly show that direct contact between the gold nanoparticle surfaces is avoided due to the presence of the shell. Other examples to achieve such small separations are alkyl ligands [116][117][118], DNA [107,[119][120][121][122], or short-chain PEG-ligands [123], amongst others. Utilizing larger molecules as ligands gives access to larger d s .…”

Section: Particle Functionalizationmentioning

confidence: 99%

Colloidal self-assembly concepts for light management in photovoltaics

et al. 2015

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Colloidal particles show interaction with electromagnetic radiation at optical frequencies. At the same time clever colloid design and functionalization concepts allow for versatile particle assembly providing monolayers of macroscopic dimensions. This has led to a significant interest in assembled colloidal structures for light harvesting in photovoltaic devices. In particular thin-film solar cells suffer from weak absorption of incoming photons. Consequently light management using assembled colloidal structures becomes vital for enhancing the efficiency of a given device. This review aims at giving an overview of recent developments in colloid synthesis, functionalization and assembly with a focus on light management structures in photovoltaics. We distinguish between optical effects related to the single particle properties as well as collective optical effects, which originate from the assembled structures.Colloidal templating approaches open yet another dimension for controlling the interaction with light. We focus in this respect on structured electrodes that have received much attention due to their dual functionality as light harvesting systems and conductive electrodes and highlight the impact of interparticle spacing for templating.

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“…As these assemblies were shown to provide interesting tools for biodiagnostics and sensing applications (see Biomedical Applications of Magnetic Nanoparticles), 71 several groups have studied extended two-and three-dimensional DNAmediated particle assemblies since then. 72, 73 Recently, Li et al have utilized linear arrays of DNA triple crossover (TX) molecules together with the strong biotin -streptavidin interaction to control the assembly of 5-nm Au nanoparticles. 74 Seven oligonucleotides were hybridized to form three doublestranded helices lying in a plane and linked by strand exchange at four immobile crossover points.…”

Section: Dna-based Systemsmentioning

confidence: 99%

Biologically Templated Nanostructure Assemblies

Behrens¹

2011

Encyclopedia of Inorganic and Bioinorganic Chemistry

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Living organisms are able to manufacture a variety of sophisticated inorganic materials with precise control over chemical composition, crystal structure, and shape. Biomolecules offer unique functionalities such as specific recognition capabilities or catalytic activity. On the basis of these recognition capabilities, biological subunits are able to self‐assemble into defined superstructures with unique shapes. Furthermore, they may respond to multiple physical, chemical, or biological stimuli, and therefore provide a potential means for manufacturing nanomachines. However, naturally occurring inorganic materials are typically based on protein scaffolds with inorganic minerals, e.g., iron oxide or calcium carbonate, which limits their technical application. Hence, the knowledge of biological concepts, functions, and design features has recently been exploited for manufacturing new, technologically important, and functional inorganic nanomaterials that have no isomorphous complement in nature. One major challenge in manufacturing nanostructures by biotemplating has been the need to either modify traditional methodologies derived from chemistry or microelectronics, or to develop new synthetic pathways, in order to make the material synthesis compatible with the relatively labile biotemplates. Various chemical procedures illustrated by selected examples have been elaborated to direct the nucleation and deposition of inorganic materials (e.g., metals, alloys, or semiconductors) on bioassemblies or to link preformed inorganic building blocks to functional biomolecules. Bioassemblies template complex, multidimensional, and inorganic nanoarchitectures that are typically not available by conventional material synthesis. Recently, the templating ability of natural bioassemblies has been improved by means of genetic engineering. Moreover, it has been demonstrated that the biological functionality of the system may be retained under appropriate conditions, which allows the manufacturing of inorganic nanostructures with motility functions. The use of diverse nanostructured bioassemblies based on both proteins (e.g., cell components such as microtubules, microfilaments, S‐layers) or microorganisms (i.e., viruses, diatoms) and deoxyribonucleic acid (DNA) is discussed for their potential of templating of inorganic nanoarchitectures.

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DNA-directed self-assembly of gold nanoparticles into binary and ternary nanostructures

Cited by 68 publications

References 37 publications

The surface plasmon modes of self-assembled gold nanocrystals

The surface plasmon modes of self-assembled gold nanocrystals

Colloidal self-assembly concepts for light management in photovoltaics

Biologically Templated Nanostructure Assemblies

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