Polyaniline-7,7,8,8-tetracyanoquinodimethanane (PANI-TCNQ) complex thin films were successfully grown by vacuum evaporation.The atomic force microscope (AFM) images showed that the rough PANI film is loosely construct...Polyaniline-7,7,8,8-tetracyanoquinodimethanane (PANI-TCNQ) complex thin films were successfully grown by vacuum evaporation.The atomic force microscope (AFM) images showed that the rough PANI film is loosely constructed from many large spherical clusters.While the PANI-TCNQ film,closely packed with many small powder-like clusters,is densified and flat.The microstructure of the complex film can be made better by vacuum annealing.Charge transfer,from PANI chains to TCNQ molecule,was observed from Fourier transfer infrared spectrum of the complex film.The charge transfer can be intensified by vacuum annealing.The relationship between the microstructure and the electric properties of the film was discussed.展开更多
The unique two dimensional chiral “seahorse” like fractal aggregates of pure tetracyanoquinodimethane (TCNQ) and PANI TCNQ complex thin films,deposited by vacuum evaporation,were observed and reported.The influence ...The unique two dimensional chiral “seahorse” like fractal aggregates of pure tetracyanoquinodimethane (TCNQ) and PANI TCNQ complex thin films,deposited by vacuum evaporation,were observed and reported.The influence of some experimental factors,such as electrostatic field,substrates and deposition rate,on the fractal pattern formation was discussed in detail.It was found that the electrostatic effects,induced by charged particles,do not play a crucial role in the pattern growth process.We suggest that the key to the formation of the patterns lies in the special molecular structure and the unique process of the crystal growth of TCNQ thin films,and a new growth model was proposed.展开更多
文摘Polyaniline-7,7,8,8-tetracyanoquinodimethanane (PANI-TCNQ) complex thin films were successfully grown by vacuum evaporation.The atomic force microscope (AFM) images showed that the rough PANI film is loosely constructed from many large spherical clusters.While the PANI-TCNQ film,closely packed with many small powder-like clusters,is densified and flat.The microstructure of the complex film can be made better by vacuum annealing.Charge transfer,from PANI chains to TCNQ molecule,was observed from Fourier transfer infrared spectrum of the complex film.The charge transfer can be intensified by vacuum annealing.The relationship between the microstructure and the electric properties of the film was discussed.
文摘The unique two dimensional chiral “seahorse” like fractal aggregates of pure tetracyanoquinodimethane (TCNQ) and PANI TCNQ complex thin films,deposited by vacuum evaporation,were observed and reported.The influence of some experimental factors,such as electrostatic field,substrates and deposition rate,on the fractal pattern formation was discussed in detail.It was found that the electrostatic effects,induced by charged particles,do not play a crucial role in the pattern growth process.We suggest that the key to the formation of the patterns lies in the special molecular structure and the unique process of the crystal growth of TCNQ thin films,and a new growth model was proposed.
