Interested areas – Paul Wu's Blog

Determine the crystalline phases of PVDF film by FTIR

Poly (vinylidene fluoride), PVDF, has different crystalline phases, such as alfa, beta, gamma, delta, epsilon, depending on film processing methods. Among them, alfa, beta, and gamma are the major phases, particularly the beta phase which determines PVDF’s pyro-, piezo-, and ferroelectric properties.

Colorless PI

Polyimide (PI) film has been broadly used in industries due to its high mechanical strength, thermal stability, low coefficient of expansion (CTE), etc.

Vibrating sample magnetometer

Vibrating sample magnetometer is a good tool to investigate materials’ magnetic properties.

ITO basics

The following figure from literature explain some physics about Indium Tin Oxide (ITO).

Nitrides

Found a useful table for Nitrides from wikipedia.

Electrically Switchable Window -Suspended Particle Devices (SPDs)

Electrically switchable window technology typically includes Electrochromic (EC), Polymer Dispersed Liquid Crystal (PDLC), and Suspended particle device (SPD).

Polarizer

Polarizers are critical components for LCD display industry. The following slide summarizes the basics for the polarizers.

Optical path for HTPS projection engines

Optical path of a high temperature polysilicon (HTPS) projection engines is shown in the following Figure.

Water proof breathable membrane

US 3,953,566 teaches a method to make a water proof breathable membrane based expandable, amorphous locked Poly tetrafluoroethylene (ePTFE).

Aggregation-induced emission (AIE)

Contrary to the well-known aggregation caused quenching of chromophore, there are certain materials show no or weak emission at solution, but strong emission when aggregated, e.g. in solid films. The phenomenon is called aggregation induced emission (AIE).