«This is the first observation of a significant pyroelectric effect in peptide microtubes similar to what's seen with semiconductor materials such as zinc oxide or
aluminum nitride,» Kholkin said.
They then coupled diamond, a material that changes its shape very little with electric voltage, with
aluminum nitride, a piezoelectric material, and embedded the IDT inside their new SAW device.
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.
They took a first step in 2010, when Cleland, then at the University of California, Santa Barbara (UCSB), siphoned every phonon out of an oscillating cantilever etched from
aluminum nitride, leaving it in its least energetic quantum ground state.
From top, light reflecting off surfaces made from aluminum, silicon, and
aluminum nitride.
The University of Minnesota chip is made with a silicon base coated with a layer of
aluminum nitride that conducts an electric change.
The resonator was
an aluminum nitride — containing structure that could dilate and contract at the very high frequency of 6 GHz.
Not exact matches
Obtaining the desired MXene usually involves a roundabout process: Layered carbides and
nitrides, known as MAX phases, are selectively etched with hydrofluoric acid to remove the layers of the «A» element, which is a group 13 or 14 element such as
aluminum, silicon, or germanium.
Compared to similar
aluminum gallium arsenide / gallium arsenide HEMTs, the gallium
nitride - based HEMTs are ten times more tolerant of radiation - induced displacement damage.
In other words, it is the internal structure itself that renders
aluminum gallium
nitride / gallium
nitride HEMTs rad - hard.
To concentrate the energy of laser light to an even finer area, the team patterned
aluminum dots of various sizes, from tens of micrometers down to 30 nanometers, across the surface of silicon, silicon germanium alloy, gallium arsenide, gallium
nitride, and sapphire.