TRIBOLOGICAL PROPERTIES OF COBALT DOPED ZINC OXIDE NANO THIN FILMS GROWN BY SILAR METHOD S. Balamurali1,2, R. Chandramohan2, M. Karunakaran2 and T. Mahalingam3 1.Research Scholar, Department of Physics, Manonmaniam Sundaranar University, Tirunelveli -627 012, India. 2. Annamalai Chettiar Research Centre, Physics Department, Sree Sevugan Annamalai College, Devakottai- 630303, India 3. Department of Physics, Karunya University, Coimbatore-641114, India.
rathinam.chandramohan@gmail.com
Fig 1: X-RD pattern for 80 & 100 Dipping Fig 2: ZnO Coated on Glass Plate at RT
Fig 4:Variation of hardness after annealing at 3000 C for 30 minutes
Fig 5:Variation of hardness after annealing at 4000 C for 30 minutes
Fig 3: Cobalt doped at RT
Fig 6:Variation of hardness after annealing at 4500 C for 30 minutes
Introduction : The shored hardness (Sh.N) is evaluated by the surface area of the indentation and is calculated from the indentation depth at the maximum force under the assumption of an ideal pyramid with a truncation. To obtain the true hardness value, evaluating the true contact surface area is very important. This determines the tribological property of thin films over soft substrates
Fig 7: Dipping Vs Avg Hardness of the Cobalt doped On ZnO thin films Glass Plate annealed at various Temp
Application : Cobalt doped ZnO thin films are used in the fabrication of Bio-Sensors. Especially for the Glucose detection from the Enzymes it is potential candidate. This poster gives the tribological property of the film which is determining the life time of the devices.
Conclusion: The studies reveal that the hardness value(Sh.N) of the thin films depend on the annealing temperaturer. When the annealing temperature is increased, the hardness value also increases depending on the thickness of the films which depends on the number of dipping. The studies reveal that the hardness value can be tailored by the proper choice of number of dipping and annealing temperature and durations of annealing.