Track-etch membranes as templates enabled nano/micro technology: a review |
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Authors: | S K Chakarvarti |
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Institution: | (1) Department of Applied Physics, National Institute of Technology (Deemed University), Kurukshetra, 136 199, Haryana, India |
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Abstract: | Many techniques are being used in order to synthesize nano-micro materials falling under the realm of nanotechnology. It need
not be overemphasized that the miniaturization of devices and synthesis of new materials have a tremendous role in the development
of powerful electronics as well as material based technologies in other areas but for the laws of quantum mechanics posing
limitations besides the increasing cost and difficulties in manufacturing in such a small scale. The quest, therefore, for
the alternative technologies, have stimulated a surge of interest in nano-meter scale materials and devices in the recent
years. Metallic as well as semiconducting nano wires are the most attractive materials because of their unique properties
having myriad of applications like interconnects for nano-electronics, magnetic devices, chemical and biosensors, whereas
the hollow tubules are equally considered to be candidates for more potent applications — both in physical as well as biosciences.
Materials’ processing for nano-structured devices is indispensable to their rational design. The technique, known as “Template
Synthesis”, using electrochemical-electro less deposition is one of the most important processes for manufacturing nano-micro
structures, nano-composites and devices and is relatively inexpensive and simple. The technique involves using membranes —
ion crafted ones (popularly known as Particle Track-Etch Membranes or Nuclear Track Filters), alumite substrate membranes,
besides other types of membranes as templates. The parameters viz., diameter as well as length i.e., aspect ratio, shape and wall surface traits in these membranes are controllable.
In the present article a detailed review of this technique using track-etch membranes as templates in synthesis of nano-micro
materials including hybrid materials and devices like field-ion emitters, resonant tunneling diodes (RTDs) etc. is presented including most of the results obtained in our laboratory.
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Keywords: | Nanotechnology track-etch membrane synthesis |
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