When talking about the active camouflage nanotechnology, nano materials can make surfaces harder, smoother, and less liable to corrode, nanotechnologies offer the potential for both “stealth” coatings that minimize the radar detection and coatings that can control the color in order to camouflage in various environments. Surfaces with locally variable color, for example, through the use of mobile pigment particles can be used for camouflage. Surfaces with tailored absorption properties for electromagnetic radiation can reduce radar and thermal signatures. It is likely that camouflage paint schemes of the near future, applied on vehicles as “smart” coatings, could be controlled with an electrical circuit by simply changing pixel colors on a screen.
The idea of “invisibility cloaks” has been much publicized through the Harry Potter stories. Far from mere fantasy, these “cloaks” can be created relatively simply by projecting what is behind a military target onto its surface to all intents and purposes, thus making it effectively camouflaged as illustrated in image. Materials used are termed as “metamaterials,” which are basically artificially engineered materials having negative refractive index. Light is neither absorbed nor reflect by the meta material, but rather passes “like water fl wing around a rock.” As a result, only the light from behind the object can be seen. Applications are still very limited at this stage, as the meta-material can only be produced in small quantities.
Active camouflage nanotechnology – Soldier Protection
A military uniform needs to perform many tasks, such as providing bulletproof protection, the ability to automatically collect and transmit information, assist in the healing process if a soldier is wounded, and protect its wearer from extreme environments such as heat and cold and the threat of biological warfare. It needs to be lightweight, strong and cheap to produce.
Carbon nanotubes; “super-material” that help to textile applications that possessing some amazing properties. For example, carbon nanotubes have a similar tensile modulus to the current best carbon fibers but are nearly 20 times stronger. Like that, wow properties are true for their electrical and thermal conductivity.
New ways of sensing can also be achieved with networks of nanotubes embedded within a polymer matrix that can also form part of battle fatigues.These networks can be distorted by external stimuli, thus creating flexible sensors. Since most polymers are insulators, any distortion of the conductive network of the nanotubes will cause an increase in electrical resistance. Thus, the carbon nanotube network becomes an integrated analog switch, whose on/off characteristics will be a function of the host polymer. For example, a stimulus could be swelling of the polymer in the presence of water, a solvent or gas, or mechanical strain. In this way, nanotube networks enable the creation of smart, responsive textiles when incorporated in a polymer fiber.
The military always try to undetectable surveillance. In the past, the phone tapping and miniature cameras were the technologies of the day.Now, listening, imaging, and in formation processing devices are smaller and more efficient than could ever have been imagined in the past.Nanotechnology is enabling new forms of “invisible” surveillance using different technologies with IT, otherwise called ubiquitous computing, including radio-frequency identification chips (RFIDs), integrated circuits, quantum dot tags, minute (bio)sensors, intelligent fabrics, films and smart surfaces. Because surveillance techniques become smaller so effectively, the idea of using live insects (“spy” bees) or creating tiny robots that emulate insects to be fly into an enemy camps to record data has formed the basis of intensive research.