A Review on the Potential Applications for Cadmium Selenide and Graphene Materials

The unique physical and chemical properties for nanomaterials make them suitable to be used in different applications such as optoelectronic devices, sensors, and biomedical applications. Physical and chemical methods are used to prepare material in nanoscale region. Physical methods depend on the technique used, temperature, and substrate. Cadmium selenide has high sensitive to technique used. Its absorbance and photoluminescence changed with increased size of particles. The surfaces of CdSe can adsorbent different atoms and molecules to saturate dangling bond. Therefore, CdSe nanoparticales are used in chemical and biological sensors. In this review some of recent applications and properties of CdSe are analyzed. Graphene considers one of the important material in the present time, because of unique properties such as high conductivity, high luminance, more hardness materials than diamonds. It is have wide applications in the physical and chemical sensor, also suitable material in the photonic device. In the present review paper we are present the application of graphene materials in the gas sensor and solar cell application.&nbsp

Degradation of Indigo Dye Using Quantum Mechanical Calculations

The semiempirical (PM3) and DFT quantum mechanical methods were used to investigate the theoretical degradation of Indigo dye. The chemical reactivity of the Indigo dye was evaluated by comparing the potential energy stability of the mean bonds. Seven transition states were suggested and studied to estimate the actually starting step of the degradation reaction. The bond length and bond angle calculations indicate that the best active site in the Indigo dye molecule is at C10=C11.  The most possible transition states are examined for all suggested paths of Indigo dye degradation predicated on zero-point energy and imaginary frequency. The first starting step of the reaction mechanism is proposed. The change in enthalpy, Gibbs free energy and change in entropy of the overall reaction are equal to -548268.223 kcal/mol, 30831.951 kcal/mol and 48.552 cal/mol.deg, respectively. The activation energy is 46176.405 kcal/mol. The reaction rate is equal to