American Elements is a manufacturer and supplier specializing in producing Cadmium Telluride (CdTe) quantum dots with spectra emission ranges from 510 nanometers (nm) to 780 nanometers (nm) wavelengths. They are charged inorganic particles that are available as a powder or in dispersion. Cadmium Telluride quantum dots are nanoparticles of certain semiconductor crystals with the novel property of having an extremely narrow emission spectrum (Gaussian Distribution) that is directly proportional to the particle's size. The smaller the particle the more its emission is blue shifted and conversely the larger the particle size, the more its emission is red shifted, thus allowing for the emission of the complete light spectra of color from the same material. CdTe Quantum Dots have the potential to turn light emitting diodes (LED) from merely display devises to illumination devices creating the first solid state lighting sources. technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement. American Elements manufactures quantum dots from several semiconductor materials, including Cadmium Telluride (CdTe),
Cadmium Selenide/Zinc Sulfide (CdSe/ZnS),
Lead Selenide (PbSe)
and Zinc Cadmium Selenide/Zinc Sulfide (ZnCdSe/ZnS) nanoparticles with well-defined peak emission frequencies.
Cadmium is a Block D, Group 12, Period 5 element. The electronic configuration is [Kr] 4d10 5s2. In its elemental form cadmium's CAS number is 7440-43-9. The cadmium atom has a radius of 148.9.pm and it's Van der Waals radius is 158.pm. Cadmium is a component of some of the lowest melting alloys; it is used in bearing alloys with low coefficients of friction and great resistance to fatigue. Cadmium is used extensively in electroplating, which accounts for about 60% of its use. It is also used in many types of solder, for standard E.M.F. cells, for nickel-cadmium batteries, and as a barrier to control nuclear fission. Cadmium compounds are used in black and white television phosphors and in blue and green phosphors for color television tubes and CRT monitors. Cadmium in glass and ceramic glazes creates a distinctive cadmium yellow. It forms a number of compounds, of which the sulfate is most common; the sulfide is used as a yellow pigment. Cadmium is similar to carbon in that it has a capacity to form stable covalently bonded molecular networks. Cadmium was first discovered by Fredrich Stromeyer in 1817.
Tellurium is a Block P, Group 16, Period 5 element. The electronic configuration is [Kr] 4d10 5s2 5p4. In its elemental form tellurium's CAS number is 13494-80-9. The tellurium atom has a radius of 143.2.pm and it's Van der Waals radius is 206.pm. Tellurium is a p-type semiconductor, and shows greater conductivity in certain directions, depending on alignment of the atoms. It is grown in crystalline form with other elements such as indium telluride. Its conductivity increases slightly with exposure to light which makes many tellurides candidates for solar energy applications. . Tellurium improves the machinability of copper and stainless steel, and its addition to lead decreases the corrosive action of sulfuric acid on lead and improves its strength and hardness. Tellurium is used as a basic ingredient in blasting caps, and is added to cast iron for chill control. Tellurium is used in ceramics. Bismuth telluride has been used in thermoelectric devices. Iron is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder. Tellurium was first discovered by Franz Muller von Reichenstein in 1782. |
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Periodic table of the elements science and academic information, elements and advanced materials data, scientific presentations and all pages, designs, concepts, logos, and color schemes herein are the copyrighted proprietary rights and intellectual property of American Elements. American Elements is a U.S. Registered Trademark. © 2001-2009. American Elements. All rights reserved. |
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Recent Research & Development for Tellurium
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Expression of Aeromonas caviae ST pyruvate dehydrogenase complex components mediate tellurite resistance in Escherichia coli.
Castro ME, Molina RC, Díaz WA, Pradenas GA, Vásquez CC.
Biochem Biophys Res Commun. 2009 Jan 22. [Epub ahead of print]
PMID: 19168030 [PubMed - as supplied by publisher]
- Chlorine gas sensors using one-dimensional tellurium nanostructures.
Sen S, Sharma M, Kumar V, Muthe KP, Satyam PV, Bhatta UM, Roy M, Gaur NK, Gupta SK, Yakhmi JV.
Talanta. 2009 Mar 15;77(5):1567-72. Epub 2008 Oct 17.
PMID: 19159765 [PubMed - in process]
- Cloning, purification and characterization of Geobacillus stearothermophilus V uroporphyrinogen-III C-methyltransferase: evaluation of its role in resistance to potassium tellurite in Escherichia coli.
Araya MA, Tantaleán JC, Pérez JM, Fuentes DE, Calderón IL, Saavedra CP, Burra R, Chasteen TG, Vásquez CC.
Res Microbiol. 2009 Jan 3. [Epub ahead of print]
PMID: 19154787 [PubMed - as supplied by publisher]
- Reversible switching between p- and n-type conduction in the semiconductor Ag10Te4Br3.
Nilges T, Lange S, Bawohl M, Deckwart JM, Janssen M, Wiemhöfer HD, Decourt R, Chevalier B, Vannahme J, Eckert H, Weihrich R.
Nat Mater. 2009 Feb;8(2):101-8. Epub 2009 Jan 18.
PMID: 19151704 [PubMed - in process]
- New vanadium(IV) and titanium(IV) oxyfluorotellurates(IV): V2Te2O7F2 and TiTeO3F2.
Laval JP, Boukharrata NJ.
Acta Crystallogr C. 2009 Jan;65(Pt 1):i1-6. Epub 2008 Dec 13.
PMID: 19129587 [PubMed]
- Atomic Layer Deposition of Metal Tellurides and Selenides Using Alkylsilyl Compounds of Tellurium and Selenium.
Pore V, Hatanpa¨a¨ T, Ritala M, Leskela¨ M.
J Am Chem Soc. 2009 Jan 5. [Epub ahead of print]
PMID: 19123860 [PubMed - as supplied by publisher]
- A convenient alignment approach for x-ray imaging experiments based on laser positioning devices.
Da Z, Donovan M, Wu X, Liu H.
Med Phys. 2008 Nov;35(11):4907-10.
PMID: 19070224 [PubMed - indexed for MEDLINE]
- CdTe nanocrystals sensitized chemiluminescence and the analytical application.
Wang Z, Li J, Liu B, Li J.
Talanta. 2009 Jan 15;77(3):1050-6. Epub 2008 Aug 22.
PMID: 19064090 [PubMed - indexed for MEDLINE]
- Synthesis of CdTe nanocrystals with mercaptosuccinic acid as stabilizer.
Wang C, Ma Q, Su X.
J Nanosci Nanotechnol. 2008 Sep;8(9):4408-14.
PMID: 19049034 [PubMed - indexed for MEDLINE]
- Well-defined stibonic and tellurinic acids.
Beckmann J, Finke P, Hesse M, Wettig B.
Angew Chem Int Ed Engl. 2008;47(51):9982-4. No abstract available.
PMID: 19006136 [PubMed - indexed for MEDLINE]
- A temperature-driven reversible phase transfer of 2-(diethylamino)ethanethiol-stabilized CdTe nanoparticles.
Qin B, Zhao Z, Song R, Shanbhag S, Tang Z.
Angew Chem Int Ed Engl. 2008;47(51):9875-8. No abstract available.
PMID: 19003838 [PubMed - indexed for MEDLINE]
- Sonication treatment of CdTe/CdS semiconductor nanocrystals and their bio-application.
Lee SJ, Kim KN, Bae PK, Chang HJ, Kim YR, Park JK.
Chem Commun (Camb). 2008 Nov 21;(43):5574-6. Epub 2008 Sep 24.
PMID: 18997956 [PubMed - indexed for MEDLINE]
- Synthesis, characterization and oxidizing properties of a diorgano tellurone carrying bulky aromatic substituents.
Oba M, Okada Y, Nishiyama K, Shimada S, Ando W.
Chem Commun (Camb). 2008 Nov 14;(42):5378-80. Epub 2008 Sep 17.
PMID: 18985216 [PubMed - indexed for MEDLINE]
- Human erythrocyte hemolysis induced by selenium and tellurium compounds increased by GSH or glucose: a possible involvement of reactive oxygen species.
Schiar VP, Dos Santos DB, Paixão MW, Nogueira CW, Rocha JB, Zeni G.
Chem Biol Interact. 2009 Jan 15;177(1):28-33. Epub 2008 Oct 15.
PMID: 18983990 [PubMed - indexed for MEDLINE]
- Thermal stabilization of tellurium in mineral acids solutions: Use of permanent modifiers for its determination in sulfur by GFAAS.
Pedro J, Stripekis J, Bonivardi A, Tudino M.
Talanta. 2006 Mar 15;69(1):199-203. Epub 2005 Oct 27.
PMID: 18970554 [PubMed - in process]
- Coprecipitation with yttrium phosphate as a separation technique for iron(III), lead, and bismuth from cobalt, nickel, and copper matrices.
Kagaya S, Araki Y, Hirai N, Hasegawa K.
Talanta. 2005 Jul 15;67(1):90-7. Epub 2005 Mar 23.
PMID: 18970141 [PubMed - in process]
- The importance of cerium substituted phosphates as cation exchanger-some unique properties and related application potentials.
Nilchi A, Khanchi A, Ghanadi Maragheh M.
Talanta. 2002 Mar 4;56(3):383-93.
PMID: 18968510 [PubMed - in process]
- Liquid-liquid extraction study of tellurium(IV) with N-n-octylaniline in halide medium and its separation from real samples.
Sargar BM, Anuse MA.
Talanta. 2001 Sep 13;55(3):469-78.
PMID: 18968391 [PubMed - in process]
- Simultaneous determination of arsenic, antimony, selenium and tin by gas phase molecular absorption spectrometry after two step hydride generation and preconcentration in a cold trap system.
Cabredo S, Galbán J, Sanz J.
Talanta. 1998 Aug;46(4):631-8.
PMID: 18967186 [PubMed - in process]
- Multielemental speciation of As, Se, Sb and Te by HPLC-ICP-MS.
Guerin T, Astruc M, Batel A, Borsier M.
Talanta. 1997 Dec 1;44(12):2201-8.
PMID: 18966969 [PubMed - in process]
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