Nanoscale features as small as 65 +/- 5 nm have been formed reproducibly by using 520 nm femtosecond pulsed excitation of a 4,4'-bis(di-n-butylamino)biphenyl chromophore to initiate crosslinking in a triacrylate blend. Dosimetry studies of the photoinduced polymerization were performed on chromophores with sizable two-photon absorption cross-sections at 520 and 730 nm. These studies show that s...

The compositional dependence of the polymerization kinetics of multiacrylate copolymers with acrylic acid (AA) was examined. The multiacrylates considered were dior triacrylate esters of oligo(ethylene glycol) (OEG). The multiacrylate polymerization rate increased with the OEG chain length in the absence of added AA. This monomer size dependence was due to mobility-related effects on the pendan...

We report on the laser action of pyrromethene 567 incorporated into polymeric matrices and pumped longitudinally with the green line of a copper-vapor laser. When the dye was dissolved in a copolymer of methyl methacrylate and pentaerythritol triacrylate, 290 mW average power at 1 kHz ~37% lasing efficiency! was obtained. The laser output decreased to 150 mW after 30 min irradiation time (1.831...

A monolithic stationary phase was prepared for liquid chromatography by in situ copolymerization of pentaerythritol triacrylate (PETA) and triallyl isocyanurate (TAIC). The morphology of monolithic column and pressure drop across the column were characterized. The effect of the porogen on the pore structure was characterized by SEM. Under the comparison condition, the monolith was suceessfully ...

This study investigates the influence of triacrylate monomer structure on volume shrinkage, tensile properties, and viscosity vat polymerization (VP) resins. The amount kept constant as 20%wt. to prevent excessive shrinkage effect. Results indicated that ethoxylated propoxylated structures are beneficial reduce VP However, these flexible chain led a reduction in properties elastic modulus resin...

Images of scantily clad women are used by advertisers to make products more attractive to men. This "sex sells" approach is increasingly employed to promote ethical causes, most prominently by the animal-rights organization PETA. Yet sexualized images can dehumanize women, leaving an unresolved paradox--is it effective to advertise an ethical cause using unethical means? In Study 1, a sample of...

High Performance Computing (HPC) has historically been the impetus for new technologies. However, in dealing with power related issues HPC has lagged behind. Power has recently been recognized as one of the major obstacles to fielding a Peta-Flop class system. In this paper we will discuss power related topics by leveraging what is currently a rare capability of examining real power usage at a ...