Building plasmonic nanostructures with DNA

Tan, Shawn J.; Campolongo, Michael J.; Luo, Dan; Cheng, Wenlong

doi:10.1038/nnano.2011.49

Cited by 754 publications

(654 citation statements)

References 121 publications

Supporting

Mentioning

635

Contrasting

Unclassified

Order By: Relevance

“…Integrating different metallic NCs into a HMNC can introduce new and enhanced properties, or multi-functionality not found in the parent metal NCs [1][2][3][4][5][6][7] . The properties of a HMNC are clearly architecture dependent [7][8][9][10][11][12][13][14][15][16][17] . Therefore, architectural engineering of HMNCs can significantly increase the possibilities to create new and more varied properties for application explorations.…”

Section: Spatial Arrangement Edge Satellitementioning

confidence: 99%

Engineering the architectural diversity of heterogeneous metallic nanocrystals

et al. 2013

View full text Add to dashboard Cite

Similar to molecular engineering where structural diversity is used to create more property variations for application explorations, the architectural engineering of heterogeneous metallic nanocrystals (HMNCs) can likewise increase the versatility of metallic nanocrystals (NCs). Here we present a synthesis strategy capable of engineering the architectural diversity of HMNCs through rational and independent programming of every architecture-determining element, that is, the shape and size of the component NCs and their spatial arrangement. The strategy is based on the galvanic replacement reaction of a self-sustaining layer formed by underpotential deposition on a polyhedral NC. The selective deposition of satellite NCs on specific site of the central NC is realized by creating a geometry-dependent heterogeneous electron distribution. This site-selective deposition approach is applicable to central NCs in various polyhedral shapes and sizes. The satellite NCs can further develop their own shape and size through crystal growth kinetics control.

show abstract

Section: Spatial Arrangement Edge Satellitementioning

confidence: 99%

Engineering the architectural diversity of heterogeneous metallic nanocrystals

et al. 2013

View full text Add to dashboard Cite

show abstract

“…A particularly exciting sensing application utilizing plasmons has been the creation of metallic nanostructures using doublestranded DNA (dsDNA) linkers 22,23 as well as DNA origami 24 . The oscillations of conduction electrons create localized surface plasmons in metal nanoparticles (NPs) which enhance local fields in a small volume around the NP 25,26 .…”

mentioning

confidence: 99%

DNA origami based assembly of gold nanoparticle dimers for surface-enhanced Raman scattering

et al. 2014

View full text Add to dashboard Cite

Plasmonic sensors are extremely promising candidates for label-free single-molecule analysis but require exquisite control over the physical arrangement of metallic nanostructures. Here we employ self-assembly based on the DNA origami technique for accurate positioning of individual gold nanoparticles. Our innovative design leads to strong plasmonic coupling between two 40 nm gold nanoparticles reproducibly held with gaps of 3.3±1 nm. This is confirmed through far field scattering measurements on individual dimers which reveal a significant red shift in the plasmonic resonance peaks, consistent with the high dielectric environment due to the surrounding DNA. We use surface-enhanced Raman scattering (SERS) to demonstrate local field enhancements of several orders of magnitude through detection of a small number of dye molecules as well as short single-stranded DNA oligonucleotides. This demonstrates that DNA origami is a powerful tool for the high-yield creation of SERS-active nanoparticle assemblies with reliable sub-5 nm gap sizes.

show abstract

“…For example, a variety of supramolecular structures have been formed through the secondary association of various organic building blocks 6 including block copolymer (BCP) micelles [7][8][9][10][11][12] . Higher order structures have also been formed by the self-assembly of inorganic nanoparticles (NPs), including particles with different but complementary shapes, and rod-like particles coated at the ends with DNA or synthetic polymers [13][14][15][16][17] . Other types of structures have been generated using BCP micelles, viruses or other scaffolds as templates for decoration with small inorganic NPs 13,18 .…”

mentioning

confidence: 99%

A design strategy for the hierarchical fabrication of colloidal hybrid mesostructures

et al. 2014

View full text Add to dashboard Cite

Advances in nanotechnology depend upon expanding the ability to create new and complex materials with well-defined multidimensional mesoscale structures. The creation of hybrid hierarchical structures by combining colloidal organic and inorganic building blocks remains a challenge due to the difficulty in preparing organic structural units of precise size and shape. Here we describe a design strategy to generate controlled hierarchical organic-inorganic hybrid architectures by multistep bottom-up self-assembly. Starting with a suspension of large inorganic nanoparticles, we anchor uniform block copolymer crystallites onto the nanoparticle surface. These colloidally stable multi-component particles can initiate the living growth of uniform cylindrical micelles from their surface, leading to three-dimensional architectures. Structures of greater complexity can be obtained by extending the micelles via addition of a second core-crystalline block copolymer. This controlled growth of polymer micelles from the surface of inorganic particles opens the door to the construction of previously inaccessible colloidal organic-inorganic hybrid structures.

show abstract

Building plasmonic nanostructures with DNA

Cited by 754 publications

References 121 publications

Engineering the architectural diversity of heterogeneous metallic nanocrystals

Engineering the architectural diversity of heterogeneous metallic nanocrystals

DNA origami based assembly of gold nanoparticle dimers for surface-enhanced Raman scattering

A design strategy for the hierarchical fabrication of colloidal hybrid mesostructures

Contact Info

Product

Resources

About