in this research work nano porous silicon layers with different porosity were prepared by using electrochemical etching. surface morphology and size of pores were investigated by scanning electron microscopy (sem).tio2 thin films with ebpvd method have been deposited on the surface of psi layers. the influence of anodization conditions such as anodization time interval and current density on el...

Background: The management of a hyperdivergent growth pattern is one the most challenging in orthodontics and different treatments are advocated. present study analyses effectiveness elastodontic therapy with AMCOP® devices treating children class II malocclusion effect on upper airway patency. Methods: group included 21 patients (10 males 11 females, mean age 8.22 ± 1.17 years) treated devices...

PURPOSE The authors investigated the extent to which differences in mobility device use existed by race/ethnicity and whether the effects were modified by age. METHOD Using Phase II of the National Health Interview Survey on Disability, the authors identified 7,148 mobility-impaired adults. Logistic regression models provided estimates of race/ethnicity, adjusting for predictors of device use...

Microfluidic fiber channels with switchable water transport are fabricated in flexible textile PET/PP materials using a preprogrammed yarn-based fabric and a yarn-selective surface modification method. The developed robust and scalable fabrication method is based on the selective functionalization of the PET yarns with an epoxide-containing polymer that is then followed by grafting patterns of ...

Poly(dimethylsiloxane) (PDMS)-based microfluidic devices are increasing in popularity due to their ease of fabrication and low costs. Despite this, there is a tremendous need for strategies to rapidly and easily tailor the surface properties of these devices. We demonstrate a one-step procedure to covalently link polymers to the surface of PDMS microchannels by ultraviolet graft polymerization....

The exploitation of nature's machinery at length scales below the dimensions of a cell is an exciting challenge for biologists, chemists and physicists, while advances in our understanding of these biological motifs are now providing an opportunity to develop real single molecule devices for technological applications. Single molecule studies are already well advanced and biological molecular m...

Rapid progress has been made in the last few years in the development direct-write, femtosecond laser micro-structuring and waveguide writing techniques in various materials, particularly semiconductor and other photo-sensitive glasses. There is considerable potential for this becoming a disruptive technology in photonic device fabrication, perhaps even leading to the development of devices tha...

This article presents use of electric field for manipulation of biological cells and modification of their physical properties in microfluidic chambers. Some fabrication procedures of electrodes and microfluidic chambers are presented, from thin film metal electrodes to three-dimensional structures. Strong electric field pulses induce formation of pores in cell membrane (electroporation), which...

The purpose of the present study was to examine the effectiveness of fluorine and silver ions implanted and deposited into acrylic resin (poly(methyl methacrylate)) using a hybrid process of plasma-based ion implantation and deposition. The surface characteristics were evaluated by X-ray photoelectron spectroscopy (XPS), contact angle measurements, and atomic force microscopy. In addition, an a...