A series of benefits in the field of the solid state compounds synthesis by solvothermal technology have been developed from the water-thermal method.The solvent

water in the hydrothermal reaction was replaced by the organic solvent in the solvothermal reaction.The organic solvents have lower boiling point

different permittivity

polarity and viscosity.It was convenient to design a new synthesis processes in the different solvents

and to produce the goal products.Many nanosized metal chalcogenides crystallites such as CdS

In

2

S

3

Sb

2

S

3

CoS

2

and SnS

2

have been synthesized by choosing the non-aqueous solvent such as benzene

toluene

tetrahytrofuran

1

2-dimethoxyethane

ethylenediamine at a lower temperature.Nanosize CdS semiconductor particles and PANI film were synthesized using the solvothermal technique and the electro-chemistry method onto the indium-tin oxide glass (ITO) respectively.The CdS structure was characterized by means of XRD

TEM and ED techniques.The nanoparticles were doped on PANI film by dipping process

and the self-assembled nanoparticles-PANI composite film was acquired.The photoelectric properties of the self-assembled film was studied by PL and Z-scan method.The result concluded that the fluorescence radiation and nonlinear absorption coefficient can be unambiguously enhanced when PANI film was decorated with CdS nanoparticles.