October 2019 – Page 2 – Paul Wu's Blog

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).

Rubber Resilience Test

Bases on ASTM D2635, Rubber resilience is the ratio of rebound height to drop height of a metal plunger of prescribed mass and shape which is allowed to fall on the rubber specimen.

Some notes about ITO

Indium tin oxide (ITO) is tin-doped In₂O₃, a n-type wide-bandgap heavily doped (or degenerate) semiconductor with certain metal-like properties. Therefore it is a transparent conductor, and broadly used in variety of industries.

Optical path for reflection/transmission measurement in Perkin Elmer spectrophotometer

The following figure from Perkin Elmer shows the optical path for transmission and reflection measurements using an integrating sphere.

Release mechanism

In the publication, Silicone Release Coatings: A Closer Look at Release Mechanisms, Dr. Glenn V. Gordon et. al. from Dow-Corning explained the release mechanism for release liners in PSA applications.

Low-E glass basics

Low-emissivity (low-E) technology is broadly adopted to develop cost-effective, energy-efficient Low-E glass for buildings and vehicles.

Color and measurement (ASTM E1164)

The color of an object is determined by illuminant (light source), object, and observer (detector, eyes).

Cryopump and maintenance

Provided temperature is low enough, all gas molecules can be condensed onto a cold surface and thus creates vacuum in an enclosed chamber.

Gloss measurement-ASTM D 523

Gloss is a measure of object’s surface property, e.g. shiny, metallic, or matte. It measures the percentage of spectral reflection.

Nano-imprinting

In the publication (Nanoscale Research Letters 2011, 6:458), Shin et al introduced a nano-imprinting process, including fabrication of a flexible imprinting mold and using this mold, the micro- to nano-sized patterns of the original master Si template were replicated on a flat Si substrate and curved aryl substrate.