Top Of Glass Research Articles

Making glass disappear

To reduce the annoying glare from the surfaces of cell phones and eyeglasses, manufacturers often coat them with antireflective films. Yet these coatings are limited because they reduce the reflection of light only at certain optimal wavelengths.Now, by directly changing the morphology of glass in a process called nanotexturing, researchers can fabricate glass that cuts down on reflection from light across wide swaths of visible and infrared wavelengths, making the material close to invisible. The new glass could be useful in devices such as laser systems and solar cells, in which light loss causes inefficient performance. The researchers, led by Charles Black, a materials scientist at Brookhaven National Laboratory, began by creating a patterned polystyrene-b-poly(methyl methacrylate) block copolymer template. When placed over top of glass, the template enables the transfer of its pattern to the material via plasma etching. In this process, which the team had previously developed for silicon,

Modeling of cellular pearl chain formation using a double photoconductive layer biochip

A typical double photoconductive layer biochip focusing biological cells and forming specific pearl chains has been studied theoretically in this paper. It was composed of two photoconductive layers coated on the bottom and top of ITO-based glass. A light pattern was used to create face-to-face virtual electrodes and the resulting oscillatory spatial electric field was employed to induce the motion of polarizable neutral particles. In order to estimate the behaviors of the suspended particles, a numerical model including dielectrophoretic forces, dipole–dipole forces and other forces, was implemented by means of the Monte Carlo method. The results indicated that steady-state chains could be formed in a uniform electric field owing to the dipole moment effect. In a non-uniform electric field created by the use of a light pattern, the positive DEP force created a more focused pattern of chains. The work concerning the numerical simulation indicated that this chip could form fixed-length particle chains in perpendicular alignment to satisfy the structured assembly of tissues in the histological engineering application.

Examination of gunshot residues transfer using ToF‐SIMS

It has been proved that time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) is a very effective technique enabling detection of traces of gunshot residues (GSRs) which are usually transferred from the palm (fingers) of an attendant of criminal scene on a primary base, e.g. top of table, glass and mobile phone. From the fingerprint, the GSRs are lifted by adhesive tape and analyzed on this secondary base by ToF‐SIMS. The results are images, in different ions, which reveal distribution of GSRs on the fingerprint. Scanning electron microscope‐energy dispersive spectroscopy (SEM‐EDS) is commonly used in examination of morphology and elemental composition of GSR particles. It was shown that ToF‐SIMS provides much additional relevant information which is important for forensic investigation. Copyright © 2012 John Wiley & Sons, Ltd.

A Section-Smear Method for Plant Cytology

An improved method for making root tip preparations of plants with medium or small chromosomes is described. Division figures are oriented in polar view by cutting paraffin cross sections of roots; the pectic substance is removed from the middle lamellae and the sections then are smeared. The procedure recommended is as follows: Kill root tips in Navashin or other fluid containing chromic acid. Wash, dehydrate, embed in paraffin, and section transversely. Stain slides bearing the sections by a Feulgen technic following the modification of De Tomasi, except that the hydrolysis is prolonged to 45 minutes, and a 10-minute washing in running water is introduced between the fuchsia and the first bath in sulfite solution. Dehydrate and mount in thin Canada balsam; then apply local pressure to top of cover glass with the tip of a scalpel, while observing the action under low power of a microscope. The prolonged hydrolysis softens the tissue and removes sufficient pectic substance so that cells of the section sep...

I.—Account of some Experiments made in Different Parts of Europe, on Terrestrial Magnetic Intensity, particularly with reference to the Effect of Height

1. The Council of the Royal Society of Edinburgh having, on my application in 1832, entrusted me with Hansteen's Magnetic Intensity Apparatus, in their possession, I feel it to be my duty to communicate to the Society the results then and subsequently obtained with it.2. The instrument consists of a mahogany box 5 inches long, 4 broad, and 2 deep, with sides and top of glass, having also a wooden tube, screwing into the top, for containing a silk-worm's fibre about 5 inches long, by which the magnetic needle is suspended so as to place itself horizontally, and after being caused to deviate from its point of rest, the time of any given number of oscillations in a horizontal plane is measured,—whilst a graduated circle in the bottom of the box indicates its arc of vibration.