Determination of fractal rough surface of polypyrrole film: AFM and electrochemical analysis

2014 ◽  
Vol 191 ◽  
pp. 104-112 ◽  
Author(s):  
Ahmad Sharifi-viand ◽  
Mohammad Ghasem Mahjani ◽  
Majid Jafarian
Keyword(s):  
Rough Surface ◽  
Electrochemical Analysis ◽  
Fractal Rough Surface ◽  
Polypyrrole Film

Dynamics of Deformable Fractal Surface in Contact with Harmonically Excited Rigid Flat

2017 ◽  
Vol 7 (2) ◽  
pp. 38-62
Author(s):  
Tamonash Jana ◽  
Anirban Mitra ◽  
Prasanta Sahoo
Keyword(s):  
Rough Surface ◽  
Dynamic Properties ◽  
Element Model ◽  
Harmonic Excitation ◽  
System Response ◽  
Fractal Surface ◽  
Fractal Rough Surface ◽  
Mass Damper ◽  
Relationship Of ◽  
Force Displacement

Dynamics of contact between a deformable fractal rough surface and a rigid flat is studied under harmonic excitation to the flat surface. Fractal surface is generated from the modified Weierstrass-Mandelbrot function and is imported to ANSYS to construct the finite element model of the same. A parameter called ‘nonlinearity exponent', is obtained from the force-displacement relationship of the rough surface and is used to find out the dynamic properties of the contacting interface using single spring-mass-damper model. The effect of variation in surface roughness and material properties on the system response is analyzed. The system exhibits superharmonic responses for different values of the nonlinearity exponent. The phase plot and time-displacement plots for the system are also furnished.

Determination of the dew point using laser light and a rough surface

1992 ◽  
Vol 91 (1-2) ◽  
pp. 5-8 ◽  
Author(s):  
Shigeaki Matsumoto ◽  
Satoru Toyooka
Keyword(s):  
Rough Surface ◽  
Laser Light ◽  
Dew Point

Electrochemical Analysis of Sulfamethoxazole by Differential Pulse Voltammograms Method

2020 ◽  
Author(s):  
Ahmad Khalaf Alkhawaldeh
Keyword(s):  
Limit Of Detection ◽  
Differential Pulse ◽  
Electrochemical Analysis ◽  
Molybdenum Oxides ◽  
Modified Glassy Carbon Electrode ◽  
Pharmaceutical Dosage Form ◽  
Maximum Peak ◽  
Peak Separation ◽  
Limit Of Quantitation

Manganese and Molybdenum oxides are well-known electro-catalysts in fuel cells systems; they are usually used as anodic materials for the oxidation of low molecular weight alcohols. The utilization of MoO2 and MnO2 as catalysts in the pharmaceutical analysis is not common yet an analytical method for the determination of Sulfamethoxazole (SMX) antibacterial agents in Pharmaceutical Dosage form is developed. The method is based on the voltammetric determination of SMX using modified glassy carbon electrode by molybdenum oxide. The two components are oxidized at the modified electrode surface with the development of current that is linearly proportional to their concentrations in the range of 7.04*10-7- 1*10-3 M for SMX. The oxidation reaction of the two components is pH-dependent, in which the buffer used is Britton-Robinson at pH = 7.00 where maximum peak current and maximum peak separation is obtained. The regression factors obtained from the calibration curves are 0.9790 for SMX and 0.9812 for TMP. The method of analysis was validated, where the limit of detection (LOD) and the limit of quantitation (LOQ) of SMX were calculated to be 1.44*10-4 M, 4.36*10-4 M and 1.27*10-4 M, 3.84*10-4 M respectively, The percentage recovery of both components was also calculated to 81 % for SMX.

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