scholarly journals Review of the Electrical Characterization of Metallic Nanowires on DNA Templates

2018 ◽  
Vol 19 (10) ◽  
pp. 3019 ◽  
Author(s):  
Türkan Bayrak ◽  
Nagesh Jagtap ◽  
Artur Erbe
Keyword(s):  
Electronic Properties ◽  
Self Assembly ◽  
Dna Nanotechnology ◽  
Electrical Characterization ◽  
Dna Nanostructures ◽  
Metallic Nanowires ◽  
Electronic Circuits ◽  
Electrically Conducting ◽  
Dna Strands

The use of self-assembly techniques may open new possibilities in scaling down electronic circuits to their ultimate limits. Deoxyribonucleic acid (DNA) nanotechnology has already demonstrated that it can provide valuable tools for the creation of nanostructures of arbitrary shape, therefore presenting an ideal platform for the development of nanoelectronic circuits. So far, however, the electronic properties of DNA nanostructures are mostly insulating, thus limiting the use of the nanostructures in electronic circuits. Therefore, methods have been investigated that use the DNA nanostructures as templates for the deposition of electrically conducting materials along the DNA strands. The most simple such structure is given by metallic nanowires formed by deposition of metals along the DNA nanostructures. Here, we review the fabrication and the characterization of the electronic properties of nanowires, which were created using these methods.

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.

scholarly journals Controlling Matter at the Molecular Scale with DNA Circuits

2019 ◽  
Vol 21 (1) ◽  
pp. 469-493 ◽  
Author(s):  
Dominic Scalise ◽  
Rebecca Schulman
Keyword(s):  
Self Assembly ◽  
Dna Computing ◽  
Chemical Information ◽  
Dna Nanostructures ◽  
Program Complex ◽  
Responsive Materials ◽  
Dna Crystals ◽  
Dna Strands ◽  
Particle Assemblies ◽  
Specific Sequences

In recent years, a diverse set of mechanisms have been developed that allow DNA strands with specific sequences to sense information in their environment and to control material assembly, disassembly, and reconfiguration. These sequences could serve as the inputs and outputs for DNA computing circuits, enabling DNA circuits to act as chemical information processors to program complex behavior in chemical and material systems. This review describes processes that can be sensed and controlled within such a paradigm. Specifically, there are interfaces that can release strands of DNA in response to chemical signals, wavelengths of light, pH, or electrical signals, as well as DNA strands that can direct the self-assembly and dynamic reconfiguration of DNA nanostructures, regulate particle assemblies, control encapsulation, and manipulate materials including DNA crystals, hydrogels, and vesicles. These interfaces have the potential to enable chemical circuits to exert algorithmic control over responsive materials, which may ultimately lead to the development of materials that grow, heal, and interact dynamically with their environments.

Automated self-assembly and electrical characterization of nanostructured films

2018 ◽  
Vol 8 (02) ◽  
pp. 283-288 ◽  
Author(s):  
Rafael C. Hensel ◽  
Kevin L. Rodrigues ◽  
Vinicius do L. Pimentel ◽  
Antonio Riul ◽  
Varlei Rodrigues
Keyword(s):  
Self Assembly ◽  
Electrical Characterization ◽  
Nanostructured Films ◽  
Image Position

Abstract

scholarly journals Self-assembly of large RNA structures: learning from DNA nanotechnology

2016 ◽  
Vol 2 (1) ◽  
Author(s):  
Jaimie Marie Stewart ◽  
Elisa Franco
Keyword(s):  
Self Assembly ◽  
De Novo ◽  
Dna Nanotechnology ◽  
De Novo Design ◽  
Dna Nanostructures ◽  
Rna Structures ◽  
Functional Nanostructures ◽  
Rna And Dna ◽  
Unique Chemical

AbstractNucleic acid nanotechnology offers many methods to build self-assembled structures using RNA and DNA. These scaffolds are valuable in multiple applications, such as sensing, drug delivery and nanofabrication. Although RNA and DNA are similar molecules, they also have unique chemical and structural properties. RNA is generally less stable than DNA, but it folds into a variety of tertiary motifs that can be used to produce complex and functional nanostructures. Another advantage of using RNA over DNA is its ability to be encoded into genes and to be expressed in vivo. Here we review existing approaches for the self-assembly of RNA and DNA nanostructures and specifically methods to assemble large RNA structures. We describe de novo design approaches used in DNA nanotechnology that can be ported to RNA. Lastly, we discuss some of the challenges yet to be solved to build micron-scale, multi stranded RNA scaffolds.

Electrical Characterization Of Defects Introduced During Plasma-Based Processing Of GaAs

1996 ◽  
Vol 442 ◽  
Author(s):  
F. D. Auret ◽  
G. Myburg ◽  
W. E. Meyer ◽  
P. N. K. Deenapanray ◽  
H. Nordhoff ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Electrical Characterization ◽  
Ion Bombardment ◽  
High Energy ◽  
Wet Etching ◽  
Low Energy ◽  
Characteristic Set ◽  
Si Doped ◽  
Metastable Defect

AbstractDLTS revealed that each plasma type (He and SiCl4) introduced its own characteristic set of defects. Some of the defects created during He processing and one defect introduced by SiCl4 etching had identical electronic properties to those introduced during high energy (MeV) He ion bombardment. SiC14etching introduced only two prominent defects, one of which is metastable with electronic properties similar to a metastable defect previously reported in high and low energy He-ion bombardment of Si-doped GaAs. IV measurements demonstrated that the characteristics of SBDs fabricated on He-ion processed surfaces were very poor compared to those of control diodes (diodes fabricated on surfaces cleaned by conventional wet etching). In contrast, the properties of SBDs fabricated on SiCl4 etched surfaces were as good as, and in some cases superior to, those of control diodes. SBDs fabricated on annealed (at 450°C for 30 minutes) He-processed samples exhibited improved but still poor rectification. In contrast, SBDs fabricated on annealed SiCl4 etched surfaces had virtually the same characteristics as those fabricated on unannealed SiCl4 etched samples.

scholarly journals Increasing Complexity in Wireframe DNA Nanostructures

Molecules ◽  
2020 ◽  
Vol 25 (8) ◽  
pp. 1823 ◽  
Author(s):  
Petteri Piskunen ◽  
Sami Nummelin ◽  
Boxuan Shen ◽  
Mauri A. Kostiainen ◽  
Veikko Linko
Keyword(s):  
Dna Nanotechnology ◽  
Design Procedure ◽  
Single Layer ◽  
Cost Effective ◽  
Shape Space ◽  
Structure Design ◽  
Biological Research ◽  
Dna Nanostructures ◽  
Dna Strands ◽  
Potential Applications

Structural DNA nanotechnology has recently gained significant momentum, as diverse design tools for producing custom DNA shapes have become more and more accessible to numerous laboratories worldwide. Most commonly, researchers are employing a scaffolded DNA origami technique by “sculpting” a desired shape from a given lattice composed of packed adjacent DNA helices. Albeit relatively straightforward to implement, this approach contains its own apparent restrictions. First, the designs are limited to certain lattice types. Second, the long scaffold strand that runs through the entire structure has to be manually routed. Third, the technique does not support trouble-free fabrication of hollow single-layer structures that may have more favorable features and properties compared to objects with closely packed helices, especially in biological research such as drug delivery. In this focused review, we discuss the recent development of wireframe DNA nanostructures—methods relying on meshing and rendering DNA—that may overcome these obstacles. In addition, we describe each available technique and the possible shapes that can be generated. Overall, the remarkable evolution in wireframe DNA structure design methods has not only induced an increase in their complexity and thus expanded the prevalent shape space, but also already reached a state at which the whole design process of a chosen shape can be carried out automatically. We believe that by combining cost-effective biotechnological mass production of DNA strands with top-down processes that decrease human input in the design procedure to minimum, this progress will lead us to a new era of DNA nanotechnology with potential applications coming increasingly into view.

scholarly journals DNA Modified with Metal Nanoparticles: Preparation and Characterization of Ordered Metal-DNA Nanostructures in a Solution and on a Substrate

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Nina Kasyanenko ◽  
Mikhail Varshavskii ◽  
Eugenii Ikonnikov ◽  
Evgenii Tolstyko ◽  
Roman Belykh ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Silicon Surface ◽  
Discharge Plasma ◽  
Silver Ions ◽  
Dna Interaction ◽  
Silver Nanoclusters ◽  
Aluminum Nanoparticles ◽  
Dna Nanostructures ◽  
Dna Strands

DNA interaction with silver and aluminum nanoparticles in a solution has been investigated with the AFM, SEM, dynamic light scattering, viscometry, and spectral methods. The comparison of DNA interaction with nanoparticles synthesized by the reduction of Ag+ions and with nanoparticles obtained by the electric discharge plasma method was done. DNA metallization in a solution and onn-silicon surface with metal nanoparticles or by the reduction of silver ions after their binding to DNA was executed and studied. It was shown that DNA strands with regular location of silver or aluminum nanoparticles can be prepared. The conditions for the formation of silver nanoparticles and silver nanoclusters on DNA were analyzed.

GROWTH AND CHARACTERIZATION OF ATOMIC AND NANOMETER SCALE WIRES ON THE SILICON SURFACE

2000 ◽  
Vol 07 (05n06) ◽  
pp. 555-560 ◽  
Author(s):  
J. NOGAMI
Keyword(s):  
Transport Properties ◽  
Electronic Properties ◽  
Self Assembly ◽  
Silicon Surface ◽  
Growth Behavior ◽  
The Self ◽  
Nanometer Scale ◽  
Semiconductor Surfaces ◽  
Length Scales

Growth of metals on semiconductor surfaces can result in the self-assembly of a variety of 1D or 2D structures whose lateral dimensions range from one atom to tens of atoms. Over this range in length scales, STM gives information about the structure, the growth behavior and the electronic properties of these small structures. STM and STS data on several different systems are presented. In addition, ongoing and future efforts to measure the transport properties of these small structures are described.

Electrical Characterization of Laser-Irradiated 4H-SiC Wafer

2002 ◽  
Vol 719 ◽  
Author(s):  
I. Salama ◽  
N. R Quick ◽  
A. Kar ◽  
Gilyong Chung
Keyword(s):  
Electronic Properties ◽  
Electrical Characterization ◽  
Electric Resistance ◽  
Current Voltage ◽  
Impurity Doping ◽  
Current Voltage Characteristics ◽  
P Type ◽  
Sic Wafer ◽  
Conventional Annealing

AbstractHighly conductive tracks are generated in low-doped epilayers on 4H-SiC wafers using a laserdirect write technique. The current-voltage characteristics are measured to study the effect of the applied voltage on the electric resistance and the surface contact of the irradiated tracks. The effect of multiple irradiations on the electronic properties of the fabricated tracks was investigated and compared with the effect of the conventional annealing process. A laser doping process was used to achieve n-type as well as p-type impurity doping in the substrate. The electronic properties of the doped tracks are measured and compared with those of the untreated wafers. Microstructural observation and surface analysis of the irradiated tracks are studied. Laser fabrication of rectifying contact on SiC substrates is demonstrated.

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