Introduction Biomimicry is a field in which scientists, engineers, and even architects study models and concepts found in nature, and try to use them to design new technologies. Biomimicry in most cases had a great success because the natural systems being forced by Evolutionary pressure to become highly optimized and efficient – Natural systems materials solution serve as a guide. One of the early examples of biomimicry was the study of birds to enable human flight. The Wright Brothers, who finally did succeed in creating and flying the first airplane in 1903, also derived inspiration for their airplane from observations of pigeons in flight. There are a lot of examples we can say for biomimicry. In this paper we concentrate on three applications being developed using the concept of biomimicry.

WATER STRIDER

This one aims To develop a microrobot that takes advantage of the surface tension of water to stay and maneuver on water with power efficiency and agility.

Usually surface tension tends to prevent the water's surface from breaking, and the robot's legs from sinking in.

Carnegie Mellon University mechanical engineer Metin Sitti inspired by the insects floating on the water investigate different materials and leg shapes to improve the ability of the robot to float on water and maneuver.

Finally he made it. The robot's body is made of a super-light carbon fiber material. Its steel legs are coated with non-stick Teflon to repel water. A tiny battery gives it power.

Fish robots Fish robots are to control the environment for pollutants and providing feedback about the condition of the waters.These robots mimic the undulating movement of real fish and are equipped with tiny chemical sensors to find the source of potentially hazardous pollutants in the water, such as leaks from vessels in the port or underwater pipelines. When they recharge their batteries via a “charging hub” they will be able to transmit the information to the port’s control center. which will mimic the undulating movement of real fish, will be equipped with tiny chemical sensors to find the source of potentially hazardous pollutants in the water, such as leaks from vessels in the port or underwater pipelines. When they recharge their batteries via a “charging hub” they will be able to transmit the information to the port’s control center. efficient solar panelsMany plants are heliotropic, gradually tilting towards the sun to optimize solar energy capture. From an expressive standpoint, a solar panel that tilts towards the sun (like a sunflower) are more efficient at generating power than those that are mounted in a fixed position.A team of three MIT students (Forrest Liau, Vyom Sharma, and George Whitfield) designed such a system.Heliotropic flowers track the sun’s motion across the sky from East to West. During the night, the flowers may assume a random orientation, while at dawn they turn again towards the East

where the sun rises. The motion is performed by motor cells in a flexible segment just below the flower, called a pulvinus.

Some solar tracking plants are not purely heliotropic: in those plants the change of orientation is an innate circadian motion triggered by light, which continues for one or more periods if the light cycle is interrupted.Leaf heliotropism is the solar tracking behavior of plant leaves. Some plant species have leaves that orient themselves perpendicularly to the sun’s rays in the morning (diaheliotropism), and others have those that orient themselves parallel to these rays at midday (paraheliotropism). Floral heliotropism is not necessarily exhibited by the same plants that exhibit leaf heliotropism.

ConclusionIn this paper ,we have concentrated only on biomimicry in the field of nanotechnology. But there are many other things yet to be learnt from her. There is a big basket full of ideas but only few of those have been accomplished so far in practice. Hence we engineers have to join hands together and discover more in this field. It is our duty to unfasten the mysteries behind the various natural phenomena. This would definitely help us to march towards a new world.