Optical bistability of partial reflection-coated thin film of oil red O.

In this paper, a thin film of oil red O coated by partial dielectric mirrors (PRFORO) operating as an optical bistable device is proposed. The equation of the output-input intensity relation considering nonlinear absorption inside PRFORO is derived and the optical bistability (OB) of PRFORO is shown. Additionally, the influence of the nonlinear refractive, absorptive coefficients of oil red O (ORO), reflective coefficient of mirrors, and the thickness of thin film on the OB is numerically investigated and discussed.

Nanosilica Extracted from Hexafluorosilicic Acid of Waste Fertilizer as Reinforcement Material for Natural Rubber: Preparation and Mechanical Characteristics.

Nanosilica particles are extracted from waste water containing a hexafluorosilicic acid discharged from Vietnamese fertilizer plants as an effective way not only to reduce waste water pollution but also to enhance the value of their waste water. Amorphous nanosilica particles are produced with diameters ranging from 40 to 60 nm and then adopted as a reinforcing additive for natural rubber (NR) composites. Morphological, mechanical, rheological, and thermal behaviors of the nanosilica-added NR composites are examined.