Can you think of a machine, which can hold a fragile egg
without breaking it? Even robots with sensory components were not expected to
deal frail substances with delicacy, as they were lacking the quality which is
referred as "thin-skinned". Technology is that extravaganza that says
‘yes’ to all those ‘no’s of the common world. In this instance, the miracle is
initiated by the engineers at UC Berkeley who have formulated an electronic
material from semiconductor nanowires which are pressure-sensitive and could be
an answer for all the questions on the touching sense of robots.
Scientists were on a struggle to design robotic devices that
are able to adjust the measure of power required to hold and function various
objects. The newly discovered pressure-sensitive materials are projected to master
that serious problem. The UC Berkeley engineers detected a mode to produce bantam
"nanowires" from a silicon-germanium alloy. These nanowires are
planned to be formed on the exterior of a cylindrical drum, which can then be
rolled around a viscous film, to stick the wires in a consistent model.
The approximation of the entire discovery is evident in the
words of Mr. Ali Javey, the head of the UC Berkeley’s artificial skin
developing research team while he said "The idea is to have a material
that functions like the human skin, which means incorporating the ability to
feel and touch objects". The
research team refers the thin skin as “e-skin" and title it as the foremost
material created out of inorganic single crystalline semiconductors. Apart from
using it in Robotics technology, these nanowires are anticipated to restitute the
sensory faculty of touch to patients of prosthetic limbs that needs substantial
improvements in the consolidation of electronic sensors with the nervous system
of human beings as well.
All the former efforts to produce an artificial skin with flexible
organic materials failed because the poor semi conductivity of organic
materials. The electronic devices built out
of organic materials would need high voltage electricity to function the
circuitry, where as the inorganic materials like crystalline silicon, have splendid
electrical dimensions and thus can work even in low power. Inorganic materials
are chemically stable as well. The highly figured basic nature of inorganic
materials is inflexibility and easiness to crack. The new discovery has proved
that inorganic nanowires of very small size can be formed highly flexible.
To construct the e-skin, the engineers made the nanowires of
size 18-by-19 pixel square matrix with a length of 7 centimeters on each of its
sides. Each of these pixels comprised a transistor made of numerous
semiconductor nanowires. These Nanowire transistors are then incorporated with
a pressure sensitive rubber situated on top to furnish the sensing practicality.
The UC Berkeley engineers employed a groundbreaking manufacturing technique
that executes like a reverse lint roller where nanowire "hairs" are
deposited in it, instead of picking up fibers in a lint roller. Now, the days
are not very far where a robot could unload the dishes without breaking the
wine glasses during the process.
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