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Nano Electronics

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Nanoelectronics refer to the field of study which is concerned with understanding, exploring and exploiting the characteristics of devices and instruments, which have directional dimensions at the nano scale. Its one of the most powerful and useful study which has helped engineers to implement new properties. it is used for building the nano electronics components just like transistors. Devices and machines are developed at the rate of 100 nanometers which is extremely small and efficient rate for processing. Nano electronics is also known as the disruptive technology because of its various properties.

Approaches in Nanoelectronics

There are essentially two different approaches to creating very small devices.

  1. Firstly there is the increasingly precise 'top-down' approach of finely machining and finishing the materials, which can be compared to a sculptor carving a statue out of marble.
  2. The second approach is called the 'bottom-up' approach, where individual atoms and molecules are placed or are self-assembled precisely where they are needed. This is a close approximation to understanding how nature works. For many years chemists have been using the 'bottom-up' approach to synthesis molecules to produce millions of different molecular structures. Nanotechnology researches have been developing a set of techniques known as molecular self-assembly and produced nanoelectronic components, such as molecular switches, molecular wires and molecular transistor.

Future perception of Nanoelectronics
 
Nanoelectronics is flourishing its manufacturing day by day scientists are exploring new characteristics of natural resources with the help of nanaoelectronics. Smallest featured integrated circuit chip which are further inserted into robots are the inventions of nanaoelectronics. Micro electronics is also evolving gradually in the nano electronics which would of great use to the technological world in the coming future. Researchers are now predicting that intelligent devices like computers will be assembled in the future by using molecules which would be the major achievement of nanoelectronics.

Recent Update in Nano electronics

Better Nanostructures for Advanced Electronics through Breakthrough Nanofabrication Technique. An international group of researchers from the University of Minnesota, Argonne National Laboratory and Seoul National University have discovered a groundbreaking technique in manufacturing nanostructures that has the potential to make electrical and optical devices smaller and better than ever before. A surprising low-tech tool of Scotch Magic tape ended up being one of the keys to the discovery.

Nanostructured Materials

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Nanostructured surfaces can be broadly defined as substrates in which the typical features have dimensions in the range 1–100 nm (although the upper limit of 100 nm may be relaxed to greater sizes in some cases, depending on the material and the specific property being investigated). The recent surge of interest in these systems stems from the remarkable effects that may arise from the critical size reduction. Interesting novel properties (catalytic, magnetic, ferroelectric, mechanical, optical and electronic) occur as we reduce the dimensions from a practically infinite (and periodic) solid crystal to a system composed of a relatively small number of atoms. So far, nanostructured materials or nanomaterials are perhaps the only sub-field of nanoscience that has made the transition from fundamental science to real world applications, thus becoming a technology (a good example of this are nanostructured surface coatings)

Nanostructured Holograms:
Nanostructured Holograms for Broadband Manipulation of Vector Beams. Nanostructured device controls the intensity, phase, and polarization of light for wide applications in optics.Applied physicists at the Harvard School of Engineering and Applied Sciences (SEAS) have demonstrated that they can change the intensity, phase, and polarization of light rays using a hologram-like design decorated with nanoscale structures.

As a proof of principle, the researchers have used it to create an unusual state of light called a radially polarized beam, which—because it can be focused very tightly—is important for applications like high-resolution lithography and for trapping and manipulating tiny particles like viruses.This is the first time a single, simple device has been designed to control these three major properties of light at once.

Nanostructured carbon materials:
Irradiating solids with energetic particles is usually thought to introduce disorder, normally an undesirable phenomenon. But recent experiments on electron or ion irradiation of various nanostructures demonstrate that it can have beneficial effects and that electron or ion beams may be used to tailor the structure and properties of nanosystems with high precision. Moreover, in many cases irradiation can lead to self-organization or self-assembly in nanostructures. In this review we survey recent advances in the rapidly evolving area of irradiation effects in nanostructured materials, with particular emphasis on carbon systems because of their technological importance and the unique ability of graphitic networks to reconstruct under irradiation. We dwell not only on the physics behind irradiation of nanostructures but also on the technical applicability of irradiation for nanoengineering of carbon and other systems.

Nanotech Engineering

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In simple terms, nanotechnology can be defined as ‘engineering at a very small scale’, and this term can be applied to many areas of research and development – from medicine to manufacturing to computing, and even to textiles and cosmetics. It can be difficult to imagine exactly how this greater understanding of the world of atoms and molecules has and will affect the everyday objects we see around us, but some of the areas where nanotechnologies are set to make a difference are described below.

Sub-Areas:

The field is loosely divided into four subareas: micro and nano instruments, nanoelectronics, nano-biosystems, and nanoengineered materials. The first addresses some of the most far-reaching yet practical applications of miniature instruments for measuring atoms or molecules in chemical, clinical, or biochemical analysis; in biotechnology for agent detection; and environmental analysis. The second category, nano electronics, concerns the development of systems and materials required for the electronics industry to go beyond current technological limits – producing even finer detail than features in a high-performance microprocessor chip. Also in this category is a new generation of electronics based on plastics, which is expected to create new markets with applications ranging from smart cards to tube-like computers. The third class, nano-bio systems, can be described as molecular manipulation of biomaterials and the associated miniaturization of analytical devices such as DNA, peptide, protein, and cell chips. The last subarea, nanoengineered materials, looks at several classes of advanced materials including nano crystalline materials and nanopowders used in electronics and photonics applications, as catalysts in automobiles, in the food and pharmaceutical industries, as membranes for fuel cells, and for industrial-scale polymers.

Future Impact:

For many, nanotechnology is viewed as merely a way to make stronger and lighter tennis rackets, baseball bats, hockey sticks, racing bikes, and other athletic equipment. But nanotechnology promises to do so much more. A more realistic view is that it will leave virtually no aspect of life untouched and is expected to be in widespread use by 2020. Mass applications are likely to have great impact particularly in industry, medicine, new computing systems, and sustainability.

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