Now researchers from Korea University, in Seoul, have developed an easy and microelectronics - compatible method to grow graphene and have successfully synthesized wafer - scale (four inches in diameter), high - quality, multi-layer graphene on
silicon substrates.
«Because of this, we can grow these lasers on larger and cheaper
silicon substrates.
In their new work, the team grew quantum dots directly on
silicon substrates using a technique known as molecular beam epitaxy, or MBE («epitaxy» refers to the process of growing one crystal on top of another, with the orientation of the top layer determined by that of the bottom).
Materials researchers at North Carolina State University have developed a technique that allows them to integrate graphene, graphene oxide (GO) and reduced graphene oxide (rGO) onto
silicon substrates at room temperature by using nanosecond pulsed laser annealing.
They deposit the III - V material onto
the silicon substrate, and its atoms self - assemble into a crystalline structure.
In the new technique, researchers start with
a silicon substrate.
What is more, this tiny laser can be bonded onto
a silicon substrate to make it compatible with compact photonics - on - a-chip technology.
In a paper published last week in the journal Nature Communications, researchers from the Department of Physics and the Department of Electronics Engineering at the UAB, and from the Birck Nanotechnology Center at Purdue University (USA), studied the heating of small current lines placed on top of
a silicon substrate, simulating the behavior of current transistors.
This is a chip - scale glass microspherical shell sensor array blown on
a silicon substrate.
The micrometer - scale device consists of a flexible aluminum plate that sits atop
a silicon substrate.
The silicon substrate is covered with cracked gold electric conducting tracks that can be pulled and stretched.
Whereas chips with horizontal racetracks alone could out - compete flash memory, creating «forests» of vertical racetracks on
a silicon substrate would yield three - dimensional memory chips with data - storage densities surpassing those of hard drives, Parkin says.
The MIT researchers deposited triangular layers of molybdenum disulfide on
a silicon substrate.
The resonator is flipped and suspended on top of an acoustic resonator, which consists of a thin aluminum nitride layer (green) deposited on a thick
silicon substrate.
«We fabricated an array of hollow microprobes with designed diameters, heights, and numbers from
a silicon substrate using microfabrication techniques.
In their study, the scientists from MIPT succeeded in growing an ultra-thin, tunnel - transparent film of this material on
a silicon substrate, while maintaining the ferroelectric properties.
Copper particles on
silicon substrate.
Imagine that rather than having a programmer's intentions written into a robot's
silicon substrate, we instead have a group of people physically carrying out the identical set of decisions and procedures.
Let us remember, though, that the essence of computation needn't be restricted to
a silicon substrate or to any metaphysically privileged medium.
Not exact matches
With their method, they were able to develop a material consisting of approximately one million mushroom - like structures on a 2.5 cm by 7.5 cm
silicon dioxide
substrate.
Conventional semiconductors are built using
silicon - based
substrates (the material upon which semiconductor devices are fabricated), but metal - insulator electronics can be made atop less pricey glass, metal or plastic
substrates.
Although such quantum dot lasers have been grown on
silicon before, their performance has not equaled that of quantum dot lasers grown on their native
substrates, which are platforms made of similar materials as the quantum dot lasers themselves.
Now Liu and his collaborators in Bowers and Gossard's groups have demonstrated a novel quantum dot laser that not only is grown on
silicon but that performs as well as similar lasers grown on their native
substrates.
«We then deposit the pieces onto
silicon wafers or other, more flexible
substrates,» Yang says.
Once a flat mica terrace has been established, Heinz says, it is no more difficult to prepare graphene on that
substrate than on traditional, somewhat rougher
substrates such as
silicon dioxide.
One reason it's tricky to make and hook up nanowires, made of single - crystal
silicon, or nanotubes, made of molecule - thick sheets of carbon, is that they are fragile and can easily break when transported from one
substrate to another.
To do this, they first had to resolve
silicon crystal lattice defects to a point where the cavities were essentially equivalent to those grown on lattice - matched gallium arsenide (GaAs)
substrates.
Thin transparent films have been cast onto n - doped
silicon (n - Si)
substrates and doped with iodine to form surfacebarrier solar cells.
Cahill explained that this work lies more on the fundamental side of thermal physics research, although materials like diamond and
silicon carbide are being actively developed as alternative
substrates for high powered radio - frequency (RF) devices.
This suppresses the electronic influence of the
silicon crystal while the graphene stays mechanically joined with the
substrate: quasi-free-standing monolayer graphene.
A major leap forward from a prototype device demonstrated in 2012, it is an ultra-thin, completely flat optical component made of a glass
substrate and tiny, light - concentrating
silicon antennas.
«It's also important in cleanroom procedures, nanofabrication and microprocessor formation,» said Schrader, who pointed out that microprocessors are fabricated on
silicon wafer
substrates with a thin layer of glass, upon which circuits are laid.
Although traditional nanofabrication techniques rely on a hard
substrate — usually glass or a
silicon wafer — Shih said researchers wanted a flexible nanostructure, which would be more suited to wearable electronics.
In this study, the researchers, from Arizona State University, used a process known as chemical vapour deposition to create a 41 micrometer - long nanosheet made from Cadmium Sulphide and Cadmium Selenide powders, using
silicon as a
substrate.
That transistor was assembled on a rigid
silicon wafer, however, and a more pliable
substrate would be needed for a truly skinlike implementation.
One of the main outcomes of the project will be to identify high - quality germanium
substrates that rival the performance of the well - established
silicon - on - insulator wafers.
Correlated electrical and microstructural studies of recrystallized
silicon thin films on bulk glass
substrates
Laser - induced crystallization of
silicon islands on amorphous
substrates: multilayer structures
The sensor read - out can be further optimized by coating a thin layer of
silicon nitride onto the glass
substrate.
display prototype with 3104 x 4128 resolution, about 385 ppi, that uses E Ink's electrophoretic ink on a
silicon thin - film transistor glass
substrate.
Unlike typical glass
silicon displays, the flexible plastic
substrates used in the reader allow the device to be both thinner, lighter and rugged.
The display technology used in the product's creation makes use of a rugged, metal - foil e-paper display and a flexible, stainless - steel
substrate for
silicon thin - film - transistors (TFT).
Most LEDs use GaN on a sapphire or
silicon carbide
substrate, but Soraa applies GaN onto a GaN
substrate to produce a more uniform, brighter and cheaper light.
Performed chemical reactions on silica,
silicon, and gold
substrates in order to develop SAMs (self assembled monolayers).