Japanese researchers have optimized the design of synthetic diamond grown in the laboratory. This has led to further advances in biosensing applications such as enhanced brain magnetic imaging. The advantages of this sandwich-type layered diamond structure are described in the latest issue of the Applied Physics Letters of the American Association of Physics (AIP) Publishing Group.

Chemical processes are used to create large pieces of diamond for industrial use. Synthetic diamond can be grown on a variety of surfaces to increase stiffness and reduce tool wear, or to utilize the high thermal conductivity of diamond as a heat sink for electronic devices. Scientists can manipulate the properties of synthetic diamond by changing the chemical composition. This chemical operation is called doping. These "doped" diamonds have proven to be an inexpensive alternative to a range of technologies from quantum information to biosensing. Otherwise, developing these technologies will be extremely expensive.

Diamonds with a nitrogen-vacancy (NV) center detect magnetic field changes and are therefore powerful tools for biosensing technology and are used for medical testing and disease diagnosis. For example, magnetoencephalography (MEG) is a neuroimaging technique used to map brain activity and track pathological abnormalities such as epilepsy tissue.

“MEG has commercial applications and is used in some hospitals, but it is so expensive that not many MEGs are used,” said Norikazu Mizuochi, one of the authors of the paper. Mizuochi explained that using diamonds with NV centers can reduce the cost of instruments for MEG diagnostics.

However, these biosensing techniques require light excitation that induces NV center charge transfer. Since the uncharged NV center cannot accurately detect the magnetic field, the introduction of charge transfer has always been a challenge for diamond utilization. “Only negative charges can be used for this type of sensing application, so achieving stabilization of the NV center is very important for the entire operation,” Mizuochi said.

Researchers have previously spiked phosphorus into a simple diamond structure to keep the NV center stable. Doped phosphorus pushes more than 90% of the NV center into a negative charge state, making magnetic field detection possible. However, phosphorus introduces noise into the readings and thus fails from positive results.

In the latest study, the Mizuochi team adjusted the diamond design strategy to maintain a stable NV center, but removed the noise induced by phosphorus. They used a sandwich-like multilayer structure in which diamond-doped diamond was like bread and was surrounded by 10 micron thick NV center packing. This stabilizes 70% to 80% of the NV center in a negative charge state while reducing the noise previously seen in the system.

High Speed Door Accessories

About high speed Door Accessories:

1.Driving system: High Speed Door Servo System motor and control, motor SNMA / SEJ +reducer+flang+encoder+control box

2.Other accessories: Middle aluminium bar, bottom aluminium bar, aluminium vertical track, stainless steel vertical track, brushes,round nylon strip, PVC roll, rolling steel tube complete, drum be;;s for rolling tube, side end covers, stainless steel cover, steel tubes, air bag sensor system, safety light beam, Microwave sensor 24 Gigahertz,PVC welding machine, smoke and fire sensors, PVC transparent window, magnetic loop, photocell, remote control, manual push button, sound warning alarm Led lamp traffic light

For some main accessories, here is detain introduction:

1).24G radar sensor:

Brand: Hofic

Technology: Microwave processor

Maintain time: 0.5s

Protection: IP54

Transmitting frequency: 24.125GHz

Maximum installation height: <5meter

Transmitting power density: <5mw/cm2

Power consumption: <1W(VA)

Installation angle: 0-90°(lengthways) -30-30°(crosswise)

Supply voltage: AC&DC 12V-30V

2).Photocell:

Approval CE & ISO9001

Power supply AC/DC 12-30V

Static current 25A

Action current 40mA

Mounting distance Max 10m

NO or NC contact Done by NO./NC. contact selection

Working environment temperature -42℃ to +45℃

Working environment humidity 10 to 90%RH

Appearance dimensions( controller) 123*50*32mm(L*W*H)

Appearance dimensions(Magic eye head) 19*13mm(L*D)

3). Remote control

Operating Voltage: AC220V/50HZ+-20%

Transmit power:≤100mW;Super regenerative module, strong anti-interference

Operating temperature:-30℃-+70℃

Working frequency: 433MHZ;transmitter 1527, millions of encoding chip

Accept sensitivity:≤110dB

Manipulation method: electric remote control

Configure the quantity: Wireless number; factory configuration transmitter two. Can be equipped with PT2272 digital decoder chip

Configure the function: Up, down, stop, anti-lock full-featured reproduction

4). Magnetic loop

Voltage: 12V AC/DC +-10% 24V 115V AC+-10% 230V

Power: <2VA

Continued electrical output: 7A / 250V AC

Frequency range: 20 to 200K Hz

Response time: infinity (factory setting) or adjust maintain time

Sensitivity: 0.01% to 0.1% divided into 3 levels

Protection level: IP30

Electromagnetic compatibility (EMC) Complies with EM50081-1 and EN50082-2

Detection loop inductance: the limit of 40uH to 100uH ideal value 80uH to 300uH

Operating temperature: -25 ℃ to 70 ℃

Storage temperature: -40 ℃ to 85 ℃

Relative humidity: <90% non-condensing

Temperature compensation: automatic compensation up to 50 ℃ / h

Connection type: 11 pin DIN rail socket

Dimensions: 41 * 78 * 85 mm (width * height * length)

Weight: 250 grams

5). manual push button

This exit switch button is made of ABS and has built-in indicator light make it looks more elegant and fashionbale. It can be widely used in public entrance gates, public door, home, office, hotel, etc.

Door Exit Button Push To Exit Switch Door Opener For Access Control Security

Main Feature

Fashionable appearance

Made of ABS Plastic

Easy to install and operate

Used for access control

Specification

Mechanical Life: 500,000 test

Material: Plastic

6). Limit switch encoder

Voltage: DC5V-24V

Output voltage: high voltage≥85%Vcc, low voltage≤0.5V

Maximum mechanical speed:6000rpm

Anti-vibration: 50m/s,10-200HZ,XYZeach way 2 times.

Current consumption:≤30mA

Response frequency: 0-100KHZ

Protection: waterproof,oil proof,dust prevention, IP54

The output code system: binary code

Operating life: MTBF≥30000(+25℃,2000rpm)

Rotational inertia:4.0x10-8kgm²

Maximum load:radial direction20N

Axial direction:10N

Weight: about 0.4kg

High Speed Door Accessories,High Speed Door,Electronic High Speed Door Accessories

Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfgaragedoor.com