Physio-mechanical Materials Testing Using Scanning Contact Potentiometry Method

Scanning Tunneling Potentiometry of Semiconductor Junctions

A method for performing scanning tunneling potentiometry of semiconductor heterojunctions is described. The method yields a direct measure of the electrostatic potential distribution across the interface, with microscopic resolution. The measurement is accomplished by scanning the probe tip at constant sample-tip separation across the junction, and adjusting the sample-tip voltage to maintain a...

Mechanical Testing of Engineering Materials

Pharmaceutical Amorphous Organic Materials Characterization by Using the Differential Scanning Calorimetry and Dynamic Mechanical Analysis

This research has been carried out in order to demonstrate the use of differential scanning calorimetry (DSC) in detecting and measuring αand β-relaxation processes in amorphous pharmaceutical systems. DSC has been employed to study amorphous samples of poly (vinylpyrrolidone) (PVP), indomethacin (InM), and ursodeoxycholic acid (UDA) that are annealed at temperature (Ta) around 0.8 of their gla...

Quantitative analysis of methacycline hydrochloride by direct potentiometry using the internal solid contact sensor.

An internal solid contact sensor (ISCS) for the determination of methacycline hydrochloride (MC.Cl), Pt/PPy/PVC(MC-PT), is described, based on the use of conducting poly(pyrrole) (PPy) as solid contact material and MC-phosphotungstate (PT) as the ion exchanger and dibutyl phthalate (DBP) as the plasticizer. A direct potentiometric method for the quantitative analysis of MC.Cl is also described....

Electro-Mechanical Testing of Conductive Materials Used in Flexible Electronics

The use of flexible electronics has increased in recent years. In order to have robust and long lasting flexible displays and sensors, the combined electro-mechanical behavior needs to be assessed. The most common method to determine electrical and mechanical behavior of conductive thin films used in flexible electronics is the fragmentation test or uniaxial tensile straining of the film and su...