Lead selenide

Fig. Vni-3. (a) Atomic force microscope (AFM) and (b) transmission electron microscope (TEM) images of lead selenide particles grown under arachidic acid monolayers. (Pi Ref. 57.)...

Detector elements are prepared either by sublimation in the presence of a small partial pressure of O2 or by chemical deposition from alkaline solution containing a lead salt and thiourea or selenourea (63). Lead sulfide and lead selenide deposit from solutions as mirror-like coatings made up of cubic crystallites 0.2—1 p.m on a side. The reaction may nominally be represented by the following ... 

Selen-. selenium, selenlc, selenide of, seleno-.. ammonium, n. ammonium selenide. -dthyl, n. ethyl selenide. -blei, n. lead selenide. 

Aqueous electrolytes proposed in the literature for cathodic electrodeposition of lead selenide are generally composed of dissolved selenous anhydride and a lead salt, such as nitrate or acetate. Polycrystalline PbSe films have been prepared by conventional electrosynthesis from ordinary acidic solutions of this kind on polycrystalline Pt, Au, Ti, and Sn02/glass electrodes. The main problem with these applications was the PbSe dendritic growth. Better controlled deposition has been achieved by using EDTA in order to prevent PbSeOs precipitation, and also acetic acid to prevent lead salt hydrolysis. 

Meincke H, Ebling DG, Heinze J, Tacke M, Bbttner H (1998) Potentiostatic oxide formation on lead selenide single crystals in alkaline solutions. J Electrochem Soc 145 2806-2812... 

Zhu JJ, Aruna ST, Koltypin Y et al (2000) A novel method for the preparation of lead selenide pulse sonoelectrochemical synthesis of lead selenide nanoparticles. Chem Mater 12 143-147... 

Zhu Jun-Jie, Wang Hui, Xu Shu, Chen Hong-Yuan Chen (2002) Sonochemical method for the preparation of monodisperse spherical and rectangular lead selenide nanoparticles. Langmuir 18 3306-3310... 

Kanniainen,T. Lindroos, S. Ihanus, J. Leskela, M. 1996. Growth of lead selenide thin films by successive ionic layer adsorption and reaction (SILAR) technique. /. Mater. Chem. 6 983-986. 

While most other techniques use a limited amount of detectors (e.g., silica for visible, photomultipliers for UV) and MIR has a small number, NIR uses many types of semiconductors for detectors. The original PbS detectors are still one of the largest used in NIR, however, indium gallium arsenide (InGaAs), indium arsenide (InAs), indium antimonide (InSb), and lead selenide (PbSe) are among the semiconductor combinations used, both cooled and ambient. 

Although the topic of sonoelectrochemistry will be treated in the subsequent section, it should also be mentioned that pulsed sonoelectroreduction of metallic salts gives rise to finely divided reactive metals which can be employed in organometallic synthesis see above [85]. The synthesis of nanocompounds of semiconductors such as cadmium and lead selenides can also be achieved using similar methodology [169]. 

PbSe lead selenide RMSEP root-mean-squared error of... 

Gorer S, Albu-Yaron A, Hodes G (1995) Quantum size effects in chemically deposited, nanociystalline lead selenide thin film. J Phys Chem 99 16442-16448... 

Gobet and Matijevic (17) produced monodisperse submicrometer-size particles of cadmium selenide (CdSe) and lead selenide (PbSe) by reversible release of selenide ions from selenourea in solutions of the corresponding metal salts. The equilibrium between selenourea and selenide ions is written as follows ... 

To date, cadmium sulfide, zinc sulfide, lead sulfide, cadmium selenide, and lead selenide semiconductor particulate films have been grown, in situ, under... 

Two factors combine to lend a greater diversity in the stereochemistries exhibited by bivalent germanium, tin and lead compounds, the increased radius of Mn compared with that of Mw and the presence of a non-bonding pair of electrons. When the non-bonding pair of electrons occupies the isotropic valence level s orbital, as in, for example, the complex cations Pb[SC(NH2)2]6+ and Pb[antipyrine]6+, or when they are donated to conductance band levels, as in the binary tin and lead selenides or tellurides or the perovskite ternary phases CsMX3 (M = Sn, Pb X = Cl, Br, I), then the metal coordination is regular. However, in the majority of compounds an apparent vacancy in the coordination sphere of the metal is observed, which is usually ascribed to the presence of the non-bonding pair of electrons in a hybrid orbital and cited as evidence for a stereochemically active lone pair . 

Baudrimont7 obtained the tetrachloride by the action of phosphorus pentachloride vapour on lead selenide. 

INFRARED TECHNOLOGY AND RAMAN SPECTROSCOPY - INFRARED TECHNOLOGY] (Vol 14) Lead selenide sulfide [110987-37-6]... 

The most recent generation of NDIR analyzers have evolved to satisfy the frequently harsh industrial environments encountered. These analyzers utilize solid-state sensors for the detection of infrared radialion. Most frequently used sensors are lead selenide (PhSc). thermopiles, or pyroelectric detectors. The gas analyzers generally are configured as single-path instruments, dual-beam with a reference palh. or dual-channel with a reference filter. 

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