This talk will provide an overview of recent work on microfluidics/electrochemical sensors atPacific Northwest National Laboratory. A microfluidic platform was fabricated based on amulti-layer lamination method. Fluidic microchannels were produced by sandwiching laser-machined adhesive-backed polyimide gaskets between layers of the device. Individualcomponents, such as microfabr...

the use of panoramic radiography, due to its numerous advantages, is increasing. radiographic films used in this technique are of double emulsion (de) type which are used with intensifying screens. single emulsion (se) films can also be used. the purpose of this study was to determine the exposure parameters to achieve an appropriate optical density in these two types of films, and to estimate ...

The adhesive characteristics of thin films (0.2-2 μm) of linear poly(dimethylsiloxane) (PDMS) liquids with a wide range of molecular weights have been measured using an atomic force microscope with a colloid probe (diameters 5 and 12 μm) for different separation velocities. The data were consistent with a residual film in the contact region having a thickness of ∼6 nm following an extended dwel...

This communication describes the fabrication of three-dimensional structures of organic polymers using principles of design inspired by protein folding. The structures consist of rigid polyhedral components with dimensions of a few millimeters ("microdomains"), representing alpha-helical and beta-sheet secondary structures, connected with flexible linkers representing loops or turns. These stru...

Adhesive bonding is a well-established technique for composite materials. Despite advanced surface treatments and preparations, contamination application errors still occur, resulting in localised areas with reduced adhesion. The dramatic reduction of the bond strength limits applicability adhesive bonds hampers further industrial adaptation. This study aims to detect weak-bonds due manufacturi...

Common transparent polymer films such as cellophane and household tape are frequently used examples of birefringent materials in textbooks classroom demonstrations. Qualitatively, birefringence is often demonstrated by layering between crossed-polarizers. In this work, we describe an inexpensive experimental setup for the quantitative measurement common films, suitable senior high school or und...

The effect of accelerated ageing on the structure and properties of single, metallized and multilayer films used in food packaging was studied, by exposing specimens of the above films to repeated ageing cycles in a weatherometer, under the combined action of UV, humidity and heat. The investigated films were: biaxially oriented polypropylene film (BOPP), metallized BOPP film, polyethylene (PE)...

We demonstrated the microtransfer molding of Norland Optical Adhesive 81 (NOA81) thin films. NOA81 nanogrooves and flat films were transferred from a flexible polydimethylsiloxane (PDMS) working mold. In case nanogrooves, mold's feature area 15 × mm2 contains variety pattern dimensions in set smaller nanogroove fields few each. that at least six microtransfers can be performed same PDMS Within ...

Understanding morphological instabilities at soft interfaces is important in a variety of diverse problems, such as adhesion/debonding in polymer films and biological cells, friction, cavitation, and patterning. Non-specific interactions of electromagnetic origin play an important role in these instabilities. Spontaneous surface patterns appear in soft solid films that are in contact proximity ...

Self-assembled monolayers (SAMs) are emerging as materials that candidates of barriers used in back-end-of–line interconnects integrated circuits for future generations. In this study, SAMs were formed on the SiO2 and porous SiOCH (p-SiOCH) films by using decyltrimethoxysilane (DTMOS) precursor vapor phase at a temperature 100 °C. The effects formation surfaces p-SiOCH electrical characteristic...