Tetraaniline (TAN) nano flower

 Tetraaniline(TAN)nano flower

Aniline is a basic aromatic amine with the chemical formula C6H5NH2.TAN is a short π-conjugated oligomer of aniline containing four aniline units.  It could be a compound resulting from the polymerization of aniline or a specific derivative with unique properties. Owing to its short length, the main properties of this oligo(aniline) are good solubility and excellent processability. TAN has multiple different oxidation states, however the emeraldine-based state is the most desirable form, as it can be acidified to form the emeraldine salt (ES) state resulting in high conductivity (approximately 0.014 S m–1). As TAN is one of the most outstanding organic semiconductors that can be potentially used for many purposes, it represents an excellent high-permittivity conducting material. It is commonly used in the production of various chemicals, including dyes, pharmaceuticals, and polymers.

TAN flower
This nano flower is created with oligoaniline molecules, a plastic-like material that is both flexible and electrically conductive. The thin sheets that comprise the 'petals' and 'leaves' are about 20 nanometres thick, which is about 5,000 times smaller than the diameter of a human hair. These materials are promising for applications in bendable supercapacitors that can serve as power sources for electronics, or miniature sensors that can rapidly detect toxic compounds
Micro capacitor
With low grafting, the relative permittivity of the elastomer slowly increases because the conducting particles are dispersed far from each other in the polymer matrix. Adding conducting particles until a particular point wherein the conducting clusters are located very close together, but are separated by a very thin elastomer matrix layer, results in the formation of microcapacitors. A high degree of microcapacitors enhances the relative permittivity and capacitance of the composite significantly. However, if the loading content is too high, the percolation threshold will be reached and the permittivity of the material will decrease.

Synthesis of TAN
In a typical synthesis process, a 0.01 M NPPD solution isprepared in water and then, 5 ml of 1 M HNO3 isadded to 50 ml of an APS solution. Then, the acidified aqueous APS solution isadded to the NPPD solution and the reaction was allowed to proceed at room temperature. After 30 minutes, the reaction mixture turns light green at the interface of toluene and water and gradually, the entire aqueous phase turns green, which indicats the formation of TAN. The reaction isallowed to proceed for 5 hours. The aqueous phase is then filtered and washed several times periodically with acetone and water and finally dried under vacuum at room temperature.