Carbon aerogels are composed of particles with sizes in the nanometer range, covalently bonded together. They have very high porosity (over 50%, with pore diameter under 100 nm) and surface areas ranging between 400–1,000 m2/g. They are often manufactured as composite paper: non-woven paper made of carbon fibers, impregnated with resorcinol-formaldehyde aerogel, and pyrolyzed. Depending on the density, carbon aerogels may be electrically conductive, making composite aerogel paper useful for electrodes in capacitors or deionization electrodes. Due to their extremely high surface area, carbon aerogels are used to create supercapacitors, with values ranging up to thousands of farads based on a capacitance of 104 F/g and 77 F/cm3. Carbon aerogels are also extremely "black" in the infrared spectrum, reflecting only 0.3% of radiation between 250 nm and 14.3 µm, making them efficient for solar energy collectors.

The term "aerogel" has been incorrectly used to describe airy masses of carbon nanotubes produced through certain chemical vapor deposition techniques—such materials can be spun into fibers with strength greater than Kevlar, and unique electrical properties. These materials are not aerogels, however, since they do not have a monolithic internal structure and do not have the regular pore structure characteristic of aerogels.

Android root function is to give full rights to Android users to access the Android system. By doing root, user can add, delete, or modify files or data that is located on the Android system which when in the default state (not root) the files are not accessible.

If analogous to the Windows computer operating system, it is almost same like giving administrator privilege to the user. And not just the user, it also gives “administrator privilege” to some applications that need to access file system. By rooting Android phone, it will not directly increase performance or capabilities of Android phones. It is only “unlock the door” for you to develop this operating system.
http://cellphone88.com/what-is-root-androi...rooting-android