ASEPE
Company
Product Description
ASEPE
Nanotechnology
Lead (II) Sulfide
(PbS)
XRD
Lead (II) sulfide (also spelled sulphide) is an inorganic compound
with the formula PbS. PbS, also known as galena, is the principal
ore, and most important compound of lead. It is a semiconducting
material with niche uses. Lead sulfide-containing nanoparticle and
quantum dots have been well studied. Traditionally, such materials
are produced by combining lead salts with a variety of sulfide
sources. PbS nanoparticles have been recent examined for use in
solar cells. PbS was once used as a black pigment, but current
applications exploit its semiconductor properties, which have long
been recognized. PbS is one of the oldest and most common
detection element materials in various infrared detectors. As an
infrared detector, PbS functions as a photon detector, responding
directly to the photons of radiation, as opposed to thermal
detectors, which respond to a change in detector element
temperature caused by the radiation. A PbS element can be used to
measure radiation in either of two ways: by measuring the tiny
photocurrent the photons cause when they hit the PbS material, or
by measuring the change in the material's electrical resistance that
the photons cause. Measuring the resistance change is the more
commonly used method. At room temperature, PbS is sensitive to
radiation at wavelengths between approximately 1 and 2.5 μm. This
range corresponds to the shorter wavelengths in the infrared
portion of the spectrum, the so-called short-wavelength infrared
(SWIR). Only very hot objects emit radiation in these wavelengths.
Cooling the PbS elements, for example using liquid nitrogen or a
Peltier element system, shifts its sensitivity range to between
approximately 2 and 4 μm. Objects that emit radiation in these
wavelengths still have to be quite hot—several hundred degrees
Celsius—but not as hot as those detectable by uncooled sensors.
(Other compounds used for this purpose include indium antimonide
(InSb) and mercury-cadmium telluride (HgCdTe), which have
somewhat better properties for detecting the longer IR
wavelengths.) The high dielectric constant of PbS leads to relatively
slow detectors (compared to silicon, germanium, InSb, or HgCdTe).
Lead (II) sulfide is so insoluble that it is almost nontoxic, but
pyrolysis of the material, as in smelting, gives dangerous fumes.
Lead sulfide is insoluble and a stable compound in the pH of blood
and so is probably one of the less toxic forms of lead. A large safety
risk occurs in the synthesis of PbS using lead carboxylates, as they
are particularly soluble and can cause negative physiological
conditions. Lead sulfide is toxic if it is heated to decomposition,
which forms lead and sulfur oxides.
Our company is able to produce this product with sizes 1-100 nm.
Nanoparticles
and Colloids (PbS)
Product Information
1.
Type: Powder
2.
Size: 20 nm
3.
Product number: SN0020
4.
Color: Light Purple, Grey
5.
Formula Weight: 239.27 g/mol
6.
CAS Number:
7.
MDL:
8.
Formula: PbS
9.
Purity: 99.9%
10.
Density: 7.5 g/mL
1314-87-0
MFCD00016280
Packaging
10, 20, 50, 100, 500, 1000 g
1.
Academic Research
2.
Agriculture
3.
Photonics
4.
Chemical R&D
SEM Picture
5.
Clinical Diagnostics
6.
Cosmetics & Personal Care
(Particle Size: 20 nm )
7.
Diagnostic Manufacturing
8.
Energy & Display
9.
Environmental & IH
10. Flavors & Fragrances
Potential Applications
1.
Application
Categories
PbS is one of the oldest and most common
detection element materials in various infrared detectors
2.
Solar Cells
3.
Photo optic applications
4.
Slip property modifier used in friction industry for
11. Food & Beverage
6.
Infrared sources (LEDs)
7.
Gas Sensing
8.
Mass detector
12. Forensics Testing
13. Medical Materials
14. Pharma Manufacturing
15. Pharma Research
16. Semiconductors
enhancing heat conduction and regulating friction coefficient.
Contact Us
5.
ASEPE Company
Infrared Technology such as Camera
Tel/Fax: +98 41 33815781
[email protected]
www.asepe-company.com
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