The etching is done in a plasma chamber where the diamond is bombarded by argon and oxygen ions, ripping the carbon atoms out
of the diamond crystal.
Not exact matches
Inesa Dayan knows her
diamonds and as Director
of Diamond Industry, her focus is
crystal clear: Create shining and brilliant marketing strategies with clients and firms that will put them and their vision in a clear light.
If they could only have cast their minds further back, perhaps they might have recalled a lost paradise: green and yellow meadows stirred by tender winds, umbrageous forests and emerald groves, glass - blue mountain peaks melting into azure skies, glittering bays whose
diamond waters break in jade and turquoise surges on sands like powdered alabaster — where the rain falls gently, and is transformed by the setting sun into shimmering curtains
of gold — where, beyond verdant valleys and limestone caves, lies a palace filled with every delight the senses can endure, enclosing garden courtyards where
crystal fountains splash in porphyry basins, intoxicating perfumes hang upon the breezes, undying flowers
of every hue shine out amid the greenery's blue shadows...
An all - in - one turntable available in natural wood and glossy piano black, the Ion uses a conical,
diamond - tipped ceramic stylus and dual built - in speakers to bring all
of your favorite vinyl tunes to life with
crystal clear precision and depth.
But the researchers discovered an oddity that made them question whether the gems came from an asteroid at all: The
diamonds had grown around even smaller
crystals of iron and sulfur, which normally would repel each other like oil and water, says EPFL physicist Cécile Hébert.
As the
diamond crystals form, they can enclose tiny amounts
of fluid or rock from their surroundings.
These crashes were big and energetic and, in the case
of the
diamond - laden meteorite's parent body, caused catastrophic disruptions that the
crystals captured.
The researchers performed hundreds
of indentation tests on tiny olivine
crystals less than a centimeter square and found that the olivine
crystal became weaker as the size
of the
diamond tip increased.
The
diamonds were then coated with a thin layer
of alumina to prevent the hydrogen from diffusing into their
crystal structure and embrittling them.
Rarer than
diamonds, the wurtzite - like
crystal structure
of boron nitride is considerably harder.
The basic building blocks
of future quantum processors are, for example, atoms, superconducting quantum electronic circuits, spin
crystals in
diamonds, and photons.
An ice - cube - sized
crystal can be diced with a
diamond saw to make 1,000 identical rectangular prisms, a process that enthralls Agranat, even though he's watched it hundreds
of times.
The team crushed a sample containing tiny
crystals of osmium and liquid argon between the jeweled jaws
of a
diamond anvil, which exerts several hundred tons per square centimeter
of pressure.
And although scientists have been able to manufacture synthetic
diamonds since 1955, current techniques create a
diamond comprised
of many small
crystals.
These tiny, enigmatic
crystals hold promise both for industry and for the study
of how
diamond grows
By synthesizing pure, bulk samples
of Si - III, Strobel and his team were able to determine that Si - III is actually a semiconductor with an extremely narrow band gap, narrower than the band gap
of diamond - like silicon
crystals, which is the most - commonly utilized kind.
An electric field causes the
diamonds to flip into square shapes, changing the structure
of the
crystal and altering its overall length by up to 10 per cent.
The researchers studied the reflectivity
of the cubic
diamond - like inverse woodpile
crystals by numerical calculations and interpreted recent experiments.
Researchers led by Martina Menneken
of Westfälische Wilhelms - Universität in Germany found that the
diamonds are surrounded by zircon
crystals, which were dated between 3.1 billion and 4.3 billion years old.
«Thin
diamond crystal reflects many colors
of light in all directions.»
A study
of tiny mineral «inclusions» within
diamonds from Botswana has shown that
diamond crystals can take billions
of years to grow.
X-ray studies
of crystals compressed between a pair
of gem - quality
diamonds reveal a range
of responses to increased pressure.
«Unique
diamond impurities indicate water deep in Earth's mantle: Scientific analysis
of diamond impurities — known as inclusions — reveal naturally forming ice
crystals and point to water - rich regions deep below the Earth's crust.»
In a study led by Alexander Pines, a senior faculty scientist with Berkeley Lab's Materials Sciences Division and UC Berkeley's Glenn T. Seaborg Professor
of Chemistry, researchers recorded the first bulk room - temperature NMR hyperpolarization
of carbon - 13 nuclei in
diamond in situ at arbitrary magnetic fields and
crystal orientations.
Their focus over the past two years has been on
diamond crystals and an impurity called a nitrogen - vacancy (NV) center, in which optical and spin degrees
of freedom are coupled.
The research group
of Alex Pines has recorded the first bulk room - temperature NMR hyperpolarization
of carbon - 13 nuclei in
diamond in situ at arbitrary magnetic fields and
crystal orientations.
«Our results in this study represent an NMR signal enhancement equivalent to that achieved in the pioneering experiments
of Lucio Frydman and coworkers at the Weizmann Institute
of Science, but using microwave - induced dynamic nuclear hyperpolarization in
diamonds without the need for precise control over magnetic field and
crystal alignment,» Pines says.
The
diamond crystals have an edge length
of between three and eight millimeters, and are then separated from the substrate and polished using a laser.
To help with understanding the
crystal structure, Steve Hackney, professor
of materials science at Michigan Tech, was able to provide crucial high - resolution images and diffraction patterns using transmission electron microscopy on ultrathin samples prepared with a
diamond knife by Owen Mills, director
of Michigan Tech's Applied Chemical & Morphological Analysis Laboratory.
The technique exploits quantum effects in tiny
diamond crystals, or «nanodiamonds», to detect changes down to a few thousandths
of a degree.
But Q - carbon can also be used to create a variety
of single -
crystal diamond objects.
But so far, decoherence, a degradation
of the delicate states caused by noise in the environment, has prevented researchers from storing more than a few bits
of linked quantum information in a
diamond crystal at a time.
Disrupted oscillations The researchers focused on nitrogen — vacancy (NV) centers, imperfections in
diamond that arise where an atom
of nitrogen and an empty space replace carbon atoms at two neighboring spots in the
crystal lattice.
When a nitrogen atom replaces a carbon in the
crystal structure
of diamond, it creates a nitrogen - vacancy center, which can store information that is written and read out using light.
Washington, DC — The U.S. Patent & Trademark Office has issued a patent to the Carnegie Institution for a method
of creating high quality
diamond crystals larger than 10 carats.
The outcome
of the new work is that so - called lonsdaleite is the same as the regular cubic form
of diamond, but it has been subjected to shock or pressure that caused defects within the
crystal structure.
X-ray spectroscopy helped to investigate the
diamond crystals collected on the fields in Africa, China, Zaire and Sierra Leone, and to find in them microinclusions ordinary water ice, but in a rare cubic phase
of ice VII.
Moreover, with the development
of diamond CVD growth in the 80s, electronic grade single
crystals became commercially available.
Methods have been developed to produce single -
crystal diamond at low pressure having a broad range
of properties.
Microdermabrasion uses either aluminum oxide
crystals or a
diamond tipped wand — hence the price tag
of some spa services.
«Alouette» strapless sweetheart wedding dress with pleated bodice and butterfly silk organza peplum skirt, featuring a delicate beaded band
of Swarovski
crystals at waist, paired with a beaded cathedral veil in
diamond white, Ines Di Santo
Givenchy
Crystal and Mother -
of - Pearl Ear Cuff $ 1,130 / / Vickisarge Swarovski
Crystal Ear Cuff $ 330 / / Ryan Storer Rose Gold - Plated Pearl Ear Cuff $ 275 / / Pamela Love Amethyst Feather Ear Cuff $ 175 / / Jennie Kwon Hanging
Diamonds Ear Cuff $ 720
Wear with a
crystal maang tikka,
diamond studs, and stacks
of melodious glass bangles on both hands.
The actress trots out yet another insanely flattering dress (a Giambattista Valli Haute Couture mini with pale - pink
crystal embellishments and a curtainlike skirt), perfect hair (shocking) and more major
diamonds on the set
of Le Grand Journal.
Each tip
of the
Crystal Branches 6 - Light Wall Sconce by Elk Lighting has a faceted, diamond - shaped crystal that exudes unprecedented sparkle and
Crystal Branches 6 - Light Wall Sconce by Elk Lighting has a faceted,
diamond - shaped
crystal that exudes unprecedented sparkle and
crystal that exudes unprecedented sparkle and shine.
The watch features a silver dial with 32
diamond - set inner bezel
of approx 1 carat and set within two scratch - resistant sapphire
crystal plates containing seven white gold - mounted floating
diamonds (0.39 ct approx.)
Accessorise with a pair
of diamond studs and a
crystal encrusted bracelet, and carry a contrasting sling bag to look like a fashion goddess.
Go monochromatic with a few pops
of color by dressing up your tank and fancy pants with the Anthropologie Captured Gems Bracelet ($ 178.00), Frayed
Diamonds Necklace in Grey ($ 168.00), Alexis Bittar
Crystal - Studded Earrings ($ 175.00), the Soon - to - Scatter Ring ($ 98.00) and Urban Outfitters» Sequin Box Purse in Lilac / Silver ($ 38.00).
Complete with a T - strap which is detailed with metallic beading, chains, and
crystals coming together in the form
of two
diamonds.
Alexis Bittar's chain link stud earrings,
crystal encrusted draping ring, and
diamond spear necklace lend just the right amount
of sparkle to our look so we feel appropriately chic all night long.