In the present work, size-tunable ZnS-scotch tape nanocomposite materials were successfully prepared using SILAR method. Scanning electron microscopy (SEM), Atomic Force Microscopy (AFM), X-ray powder diffraction (XRD) and Brunauer-Emmett-Teller (BET) porosity measuring techniques were used for morphological, structural and porosity determination of the prepared nanocomposite materials. UV-Visible absorption and Fourier-Transform infrared (FTIR) spectroscopy techniques were used for investigation of optical properties of the prepared nanocomposite. The confinement of electrons and holes in semiconductor nanostructured materials in lower cycles of SILAR depicts a blue shift in the band gap, which obtained by UV-Visible absorption spectra and described by Effective Mass Approximation (EMA) and Hyperbolic Band Model (HBM). In higher cycles of SILAR, with increasing in particles sizes, a red shift was observed at the position of the peak in the absorption spectrum and consequently optical band gap decreases. Wettability measurement of ZnS-scotch tape nanocomposite materials was investigated by contact angle measurement of water drop on the surface. BET results show a various and alternative behavior. At initial cycles of SILAR, the special surfaces are decreases by increasing cycles of SILAR until 4 cycles, then after 4 cycles of SILAR, the special surfaces are increased with increasing cycles of SILAR, until 12 cycles, then, the special surfaces have decreased with increasing cycles until 16 cycles of SILAR.