O.D. Osahon

The skin is the largest sensory organ in the human body and is crucial for protection, regulating temperature, and sensory detection. It acts as a complex boundary between the body and the outside world, reacting to electrical impulses, physical forces, and changes in temperature. A thorough understanding of the biophysical characteristics of the skin is essential for advancements in material science, biomedical engineering, dermatology, and biomedicine. This research explores how the mechanical, thermal, and electrical properties of human skin affect its functionality. The study examines skin elasticity, viscoelastic behavior, heat transfer mechanisms, and electrodermal activity through a comprehensive review of existing studies and experimental methods. This research review explored skin elasticity, viscoelastic behavior, heat transfer, and electrodermal activity. Using nanoindentation and stress- strain analysis, it found that skin elasticity varies by body region and age, with Young's modulus decreasing as we age. Creep and stress relaxation tests confirmed the skin's viscoelastic properties. Thermal properties were assessed using infrared thermography, indicating that well-hydrated skin dissipates heat more effectively. The skin's role in thermoregulation is reinforced by studies on vasodilation and sweating. V Electrodermal activity (EDA) and skin impedance spectroscopy reveal that skin conductivity changes with moisture levels and external stimuli, serving as important indicators of emotional and physiological states. This study also explores how sensory nerves convey tactile and thermal sensations to the nervous system. The findings enhance our understanding of the skin's multifunctionality and have potential applications in medical diagnostics, wearable technology, and prosthetics, aligning with existing research in biophysics and dermatology

Thin films of Strontium iodide (SrI2) were successfully deposited on glass slides at a temperature of 50°C in a chemical bath for 7½ hours, using improved solution growth technique (SGT) in different molar concentrations ranging from 0.03M. 0.06M, 0.09M, 0.12M and 0.15M. A Double beam spectrophotometer was used to obtain the spectra absorbance data while the other properties were calculated using the theory. The average optical and solid state properties include Absorbance (A)=0.149-0.541 Reflectance (R)- 0.141-0.203, Transmittance (T)=0.288-0.710, Absorbing Power (a)=0.342- 1.25, Refractive Index (n)=2.20-2.64. Film Thickness (0=0.937-0.972, and Band Gap (Eg)-3.318-3.419. While the Strontium thin films can be used as antireflection coatings, it is observed that thin films with refractive index greater than 1.9 can be used as Construction of Poultry house, solar cells, etc. The deposited thin films have band gap within light energy range from 1.5-3.0 eV of the electromagnetic spectrum and could be useful for applications in solar electricity for rural electrification which improves the standard of living. telecommunication