Modular, polymer-directed nanoparticle assembly for fabricating metamaterials

2016 ◽  
Vol 186 ◽  
pp. 489-502 ◽  
Author(s):  
Gurunatha K. Laxminarayana ◽  
Matthew Rozin ◽  
Stephanie Smith ◽  
Andrea R. Tao
Keyword(s):  
Self Assembly ◽  
High Yield ◽  
Plasmon Coupling ◽  
Modular Approach ◽  
Large Area ◽  
Polymer Thin Film ◽  
Polymer Templating ◽  
Surface Plasmon Coupling ◽  
Phase Sensitive ◽  
Meta Atom

We achieve the fabrication of plasmonic meta-atoms by utilizing a novel, modular approach to nanoparticle self-assembly that utilizes polymer templating to control meta-atom size and geometry. Ag nanocubes are deposited and embedded into a polymer thin-film, where the polymer embedding depth is used to dictate which nanocube faces are available for further nanocrystal binding. Horizontal and vertical nanocube dimers were successfully fabricated with remarkably high yield using a bifunctional molecular linker to bind a second nanocube. Surface plasmon coupling can be readily tuned by varying the size, shape, and orientation of the second nanoparticle. We show that meta-atoms can be fabricated to exhibit angle- and polarization-dependent optical properties. This scalable technique for meta-atom assembly can be used to fabricate large-area metasurfaces for polarization- and phase-sensitive applications, such as optical sensing.

scholarly journals Fabrication of Size-Controlled Metallic Nanogaps down to the Sub 3-Nm Level

2020 ◽  
Author(s):  
Sihai Luo ◽  
Andrea Mancini ◽  
Rodrigo Berté ◽  
Bård H. Hoff ◽  
Stefan A. Maier ◽  
...  
Keyword(s):  
Self Assembly ◽  
Surface Enhanced Raman Spectroscopy ◽  
High Yield ◽  
Large Area ◽  
Practical Applications ◽  
Molecular Diodes ◽  
Surface Enhanced Raman ◽  
Visible Light Active ◽  
Patterning Technique ◽  
Optical Applications

Metallic nanogaps are fundamental components of nanoscale photonic and electronic devices. However, the lack of reproducible high-yield fabrication methods with nanometric control over the gap-size has hindered practical applications. Here, we report a patterning technique based on molecular self-assembly and physical peeling that allows the gap-width to be tuned over the range 3 – 30 nm and enables the fabrication of massively parallel nanogap arrays containing hundreds of millions of ring-shaped nanogaps (RSNs). The method is used here to prepare molecular diodes across sub-3-nm metallic nanogaps and to fabricate visible-light-active plasmonic substrates based on large-area, gold-based RSN arrays. The substrates are applicable to a broad range of optical applications, and are used here as substrates for surface-enhanced Raman spectroscopy (SERS), providing high enhancement factors of up to 3e8 relative to similar, gap-free thin gold films.

scholarly journals Fabrication of Size-Controlled Metallic Nanogaps down to the Sub 3-Nm Level

2020 ◽  
Author(s):  
Sihai Luo ◽  
Andrea Mancini ◽  
Rodrigo Berté ◽  
Bård H. Hoff ◽  
Stefan A. Maier ◽  
...  
Keyword(s):  
Self Assembly ◽  
Surface Enhanced Raman Spectroscopy ◽  
High Yield ◽  
Large Area ◽  
Practical Applications ◽  
Molecular Diodes ◽  
Surface Enhanced Raman ◽  
Visible Light Active ◽  
Patterning Technique ◽  
Optical Applications

Metallic nanogaps are fundamental components of nanoscale photonic and electronic devices. However, the lack of reproducible high-yield fabrication methods with nanometric control over the gap-size has hindered practical applications. Here, we report a patterning technique based on molecular self-assembly and physical peeling that allows the gap-width to be tuned over the range 3 – 30 nm and enables the fabrication of massively parallel nanogap arrays containing hundreds of millions of ring-shaped nanogaps (RSNs). The method is used here to prepare molecular diodes across sub-3-nm metallic nanogaps and to fabricate visible-light-active plasmonic substrates based on large-area, gold-based RSN arrays. The substrates are applicable to a broad range of optical applications, and are used here as substrates for surface-enhanced Raman spectroscopy (SERS), providing high enhancement factors of up to 3e8 relative to similar, gap-free thin gold films.

Nanoscale Self-Assembly Using Ion and Electron Beam Techniques: A Rapid Review

MRS Advances ◽  
2020 ◽  
Vol 5 (64) ◽  
pp. 3507-3520
Author(s):  
Chunhui Dai ◽  
Kriti Agarwal ◽  
Jeong-Hyun Cho
Keyword(s):  
Electron Beam ◽  
Self Assembly ◽  
Ion Beam ◽  
Three Dimensional ◽  
The Self ◽  
Stress Generation ◽  
Rapid Review ◽  
High Yield ◽  
3D Nanostructures ◽  
Self Assembled

AbstractNanoscale self-assembly, as a technique to transform two-dimensional (2D) planar patterns into three-dimensional (3D) nanoscale architectures, has achieved tremendous success in the past decade. However, an assembly process at nanoscale is easily affected by small unavoidable variations in sample conditions and reaction environment, resulting in a low yield. Recently, in-situ monitored self-assembly based on ion and electron irradiation has stood out as a promising candidate to overcome this limitation. The usage of ion and electron beam allows stress generation and real-time observation simultaneously, which significantly enhances the controllability of self-assembly. This enables the realization of various complex 3D nanostructures with a high yield. The additional dimension of the self-assembled 3D nanostructures opens the possibility to explore novel properties that cannot be demonstrated in 2D planar patterns. Here, we present a rapid review on the recent achievements and challenges in nanoscale self-assembly using electron and ion beam techniques, followed by a discussion of the novel optical properties achieved in the self-assembled 3D nanostructures.

scholarly journals Constructing Large 2D Lattices Out of DNA-Tiles

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1502
Author(s):  
Johannes M. Parikka ◽  
Karolina Sokołowska ◽  
Nemanja Markešević ◽  
J. Jussi Toppari
Keyword(s):  
Self Assembly ◽  
Dna Nanotechnology ◽  
Building Blocks ◽  
High Yield ◽  
Dna Nanostructures ◽  
Liquid Interfaces ◽  
Basic Principles ◽  
Dna Tiles ◽  
One Step ◽  
Solid Liquid

The predictable nature of deoxyribonucleic acid (DNA) interactions enables assembly of DNA into almost any arbitrary shape with programmable features of nanometer precision. The recent progress of DNA nanotechnology has allowed production of an even wider gamut of possible shapes with high-yield and error-free assembly processes. Most of these structures are, however, limited in size to a nanometer scale. To overcome this limitation, a plethora of studies has been carried out to form larger structures using DNA assemblies as building blocks or tiles. Therefore, DNA tiles have become one of the most widely used building blocks for engineering large, intricate structures with nanometer precision. To create even larger assemblies with highly organized patterns, scientists have developed a variety of structural design principles and assembly methods. This review first summarizes currently available DNA tile toolboxes and the basic principles of lattice formation and hierarchical self-assembly using DNA tiles. Special emphasis is given to the forces involved in the assembly process in liquid-liquid and at solid-liquid interfaces, and how to master them to reach the optimum balance between the involved interactions for successful self-assembly. In addition, we focus on the recent approaches that have shown great potential for the controlled immobilization and positioning of DNA nanostructures on different surfaces. The ability to position DNA objects in a controllable manner on technologically relevant surfaces is one step forward towards the integration of DNA-based materials into nanoelectronic and sensor devices.

DNA-Mediated Au–Au Dimer-Based Surface Plasmon Coupling Electrochemiluminescence Sensor for BRCA1 Gene Detection

2021 ◽  
Vol 93 (6) ◽  
pp. 3308-3314
Author(s):  
Qian Zhang ◽  
Yu Tian ◽  
Zihui Liang ◽  
Zizhun Wang ◽  
Shuping Xu ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Brca1 Gene ◽  
Plasmon Coupling ◽  
Gene Detection ◽  
Surface Plasmon Coupling

scholarly journals Towards achieving a large-area and defect-free nano-line pattern via controlled self-assembly by sequential annealing

Giant ◽  
2021 ◽  
pp. 100078
Author(s):  
Tao Wen ◽  
Bo Ni ◽  
Yuchu Liu ◽  
Wei Zhang ◽  
Zi-Hao Guo ◽  
...  
Keyword(s):  
Self Assembly ◽  
Line Pattern ◽  
Large Area

Direct observation of one-dimensional plasmon coupling in metallic nanofibers prepared by evaporation-induced self-assembly with DNA

Nanoscale ◽  
2012 ◽  
Vol 4 (21) ◽  
pp. 6814 ◽  
Author(s):  
Hidenobu Nakao ◽  
Shiho Tokonami ◽  
Taichi Hamada ◽  
Hiroshi Shiigi ◽  
Tsutomu Nagaoka ◽  
...  
Keyword(s):  
Direct Observation ◽  
Self Assembly ◽  
Plasmon Coupling ◽  
One Dimensional ◽  
Evaporation Induced Self Assembly

Engineering the shape of Zinc Oxide crystals via sonochemical or hydrothermal solution-based methods

2008 ◽  
Vol 1087 ◽  
Author(s):  
Marco Palumbo ◽  
Simon J. Henley ◽  
Thierry Lutz ◽  
Vlad Stolojan ◽  
David Cox ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Self Assembly ◽  
Hydrothermal Solution ◽  
Good Control ◽  
Transparent Conductors ◽  
Zno Nanostructures ◽  
Large Area ◽  
Light Emitting Devices ◽  
Wide Range ◽  
Solution Methods

AbstractRecent results in the use of Zinc Oxide (ZnO) nano/submicron crystals in fields as diverse as sensors, UV lasers, solar cells, piezoelectric nanogenerators and light emitting devices have reinvigorated the interest of the scientific community in this material. To fully exploit the wide range of properties offered by ZnO, a good understanding of the crystal growth mechanism and related defects chemistry is necessary. However, a full picture of the interrelation between defects, processing and properties has not yet been completed, especially for the ZnO nanostructures that are now being synthesized. Furthermore, achieving good control in the shape of the crystal is also a very desirable feature based on the strong correlation there is between shape and properties in nanoscale materials. In this paper, the synthesis of ZnO nanostructures via two alternative aqueous solution methods - sonochemical and hydrothermal - will be presented, together with the influence that the addition of citric anions or variations in the concentration of the initial reactants have on the ZnO crystals shape. Foreseen applications might be in the field of sensors, transparent conductors and large area electronics possibly via ink-jet printing techniques or self-assembly methods.

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