Gallium Arsenide is a semiconductor with superior electronic properties to silicon. It has a higher saturated electron velocity and higher electron mobility, allowing it to function at microwave frequencies.American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia)and follows applicable ASTM testing standards.Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.
Gallium is a Block P, Group 13, Period 4 element. The number of electrons in each of Gallium's shells is 2, 8, 18, 3 and its electronic configuration is [Ar] 3d10 4s2 4p1. In its elemental form gallium's CAS number is 7440-55-3. The gallium atom has a radius of 122.1.pm and it's Van der Waals radius is 187.pm. Gallium is not toxic. Gallium is one of three elements that naturally occur as a liquid at room temperature. The other two are mercury and cesium. The application of gallium that has received the most attention is the production of semiconducting compounds. Of these, the most important are the compounds of gallium with antimony, arsenic or phosphor. Nowadays gallium arsenide (Ga-As) is undoubtedly the most used. This compound is used in the production of several electronic parts such as diodes and transistors, made for voltage rectification, signal amplification, etc. Other gallium arsenide applications are the semiconductor "lasing" and microwave generation and also in sensors to measure temperature, light or magnetic field. Gallium was first discovered by Hans Christian Oersted in 1825. See Gallium research below.
Arsenic is a Block P, Group 15, Period 4 element. The number of electrons in each of Arsenic's shells is 2, 8, 18, 5 and its electronic configuration is [Ar] 3d10 4s2 4p3. In its elemental form arsenic's CAS number is 1327-53-3. The arsenic atom has a radius of 124.5.pm and it's Van der Waals radius is 185.pm. Arsenic in the organic form is not harmful but in the inorganic form it is extremely toxic even in very small amounts. Arsenic has numerous applications as a semiconductor and other electronic applications as Indium arsenide, silicon arsenide and tin arsenidea. Arsenic is finding increasing uses as a doping agent in solid-state devices such as transistors. Gallium arsenide is used as a laser material to convert electricity directly into coherent light. Arsenic is used in bronzing and for hardening and improving the sphericity of shot. Arsenic is available as metal and compounds with purities from 99% to 99.9999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder. Arsenic information, including Technical Data, Safety Data and its High Purity properties, research, applications and other useful facts are discussed here. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included. See Arsenic research below.
An arsenide, an anion with the charge -3, is a rare mineral group consisting of compounds of one or more metals with arsenic (As). Arsenide anions have no existence in solution since they are extremely basic. These solid salts have very high lattice energies and are toxic due to the inherent toxicity of arsenic. Arsenides have applications in semiconductors, laser and light-emitting diodes, quantum dots, and optical and pressure sensors.
American Elements semi conducting materials are crystal structures produced from ultra high purity starting materials synthesized by our high purity production facility which includes several large electric muffle furnaces, a tube furnace for hydrogen reduction, 50 gallon glass-lined Pfaudler reactors supported by our analytical laboratory containing X-ray diffraction, SEM, AA, BET surface area, and ICP Spectrometry for trace metals analysis. See a discussion of American Elements Ultra High Purity and Analytical capabilities. See Crystal Growth for processes used to fabricate semiconductor materials, which include:
Crystal "pulling" by the Czochaiski method for production of semiconductor materials
Flux growth and gradient freeze
Directional solidification of fluorites using both the Bridgman-Stockbarger and float zoning techniques
PACKAGING SPECIFICATIONS FOR BULK & RESEARCH QUANTITIES
Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Material Safety Data Sheet (MSDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes.
Synthesis of fluoranthenes by hydroarylation of alkynes catalyzed by gold(I) or gallium trichloride.
Pascual S, Bour C, de Mendoza P, Echavarren AM.
Beilstein J Org Chem. 2011;7:1520-5. Epub 2011 Nov 14.
PMID:
22238527
[PubMed - in process]
Radioguided surgery in neuroendocrine tumors using ga-68-labeled somatostatin analogs: a pilot study.
Kaemmerer D, Prasad V, Daffner W, Haugvik SP, Senftleben S, Baum RP, Hommann M.
Clin Nucl Med. 2012 Feb;37(2):142-7.
PMID:
22228336
[PubMed - in process]
Complexation of Metal Ions with TRAP (1,4,7-Triazacyclononane Phosphinic Acid) Ligands and 1,4,7-Triazacyclononane-1,4,7-triacetic Acid: Phosphinate-Containing Ligands as Unique Chelators for Trivalent Gallium.
Simecek J, Schulz M, Notni J, Plutnar J, Kubícek V, Havlícková J, Hermann P.
Inorg Chem. 2012 Jan 2;51(1):577-90. Epub 2011 Dec 20.
PMID:
22221285
[PubMed - in process]
A Sterically Demanding Iminopyridine Ligand Affords Redox-Active Complexes of Aluminum(III) and Gallium(III).
Myers TW, Berben LA.
Inorg Chem. 2012 Jan 5. [Epub ahead of print]
PMID:
22220939
[PubMed - as supplied by publisher]
Report from the 1(st )World Congress on Gallium-68 and Peptide Receptor Radio Nuclide Therapy (PRRNT), Bad Berka (Germany), June 23-26, 2011.
Jurgilewicz D.
Nucl Med Rev Cent East Eur. 2011;14(2):125-6. No abstract available.
PMID:
22219158
[PubMed - in process]
Molecular effects of gallium on osteoclastic differentiation of mouse and human monocytes.
Verron E, Loubat A, Carle GF, Vignes-Colombeix C, Strazic I, Guicheux J, Rochet N, Bouler JM, Scimeca JC.
Biochem Pharmacol. 2011 Dec 19. [Epub ahead of print]
PMID:
22202439
[PubMed - as supplied by publisher]
The ARRONAX Project.
Haddad F, Barbet J, Chatal JF.
Curr Radiopharm. 2011 Jul 1;4(3):186-96.
PMID:
22201708
[PubMed - in process]
Differential Cytostatic and Cytotoxic Action of Metallocorroles against Human Cancer Cells: Potential Platforms for Anticancer Drug Development.
Lim P, Mahammed A, Okun Z, Saltsman I, Gross Z, Gray HB, Termini J.
Chem Res Toxicol. 2012 Jan 10. [Epub ahead of print]
PMID:
22185566
[PubMed - as supplied by publisher]
Autonomic Restoration of Electrical Conductivity.
Blaiszik BJ, Kramer SL, Grady ME, McIlroy DA, Moore JS, Sottos NR, White SR.
Adv Mater. 2011 Dec 20. doi: 10.1002/adma.201102888. [Epub ahead of print]
PMID:
22183927
[PubMed - as supplied by publisher]
Dependence of the Redshifted and Blueshifted Photoluminescence Spectra of Single In_{x}Ga_{1-x}As/GaAs Quantum Dots on the Applied Uniaxial Stress.
Jöns KD, Hafenbrak R, Singh R, Ding F, Plumhof JD, Rastelli A, Schmidt OG, Bester G, Michler P.
Phys Rev Lett. 2011 Nov 18;107(21):217402. Epub 2011 Nov 15.
PMID:
22181923
[PubMed - in process]
Second line salvage chemotherapy for transplant-eligible patients with Hodgkin lymphoma resistant to platinum-containing first-line salvage chemotherapy.
Villa D, Seshadri T, Puig N, Massey C, Tsang R, Keating A, Crump M, Kuruvilla J.
Haematologica. 2011 Dec 16. [Epub ahead of print]
PMID:
22180434
[PubMed - as supplied by publisher]
Hole spin relaxation in Ge-Si core-shell nanowire qubits.
Hu Y, Kuemmeth F, Lieber CM, Marcus CM.
Nat Nanotechnol. 2011 Dec 18;7(1):47-50. doi: 10.1038/nnano.2011.234.
PMID:
22179569
[PubMed - in process]
Synthesis, radiometal labeling and in vitro evaluation of a targeted PPIX derivative.
Behnam Azad B, Cho CF, Lewis JD, Luyt LG.
Appl Radiat Isot. 2012 Mar;70(3):505-11. Epub 2011 Dec 6.
PMID:
22178308
[PubMed - in process]
Leukemia, thyroiditis and gallium-67 scan.
Wiwanitkit V.
Indian J Med Paediatr Oncol. 2011 Apr;32(2):122. No abstract available.
PMID:
22174505
[PubMed - in process]
Unusual presentation of mycosis fungoides as a lump in the scalp.
Imran MB, Othman S, Shahid A.
Singapore Med J. 2011 Nov;52(11):e226-8.
PMID:
22173261
[PubMed - in process]
(68)Ga-labeling and in vivo evaluation of a uPAR binding DOTA- and NODAGA-conjugated peptide for PET imaging of invasive cancers.
Persson M, Madsen J, Ostergaard S, Ploug M, Kjaer A.
Nucl Med Biol. 2011 Dec 13. [Epub ahead of print]
PMID:
22172391
[PubMed - as supplied by publisher]
Cathodoluminescence spectra of gallium nitride nanorods.
Tsai CC, Li GH, Lin YT, Chang CW, Wadekar P, Chen QY, Rigutti L, Tchernycheva M, Julien FH, Tu LW.
Nanoscale Res Lett. 2011 Dec 14;6(1):631. [Epub ahead of print]
PMID:
22168896
[PubMed - as supplied by publisher]
Design of neutral lewis superacids of group 13 elements.
Mück LA, Timoshkin AY, Frenking G.
Inorg Chem. 2012 Jan 2;51(1):640-6. Epub 2011 Dec 14.
PMID:
22168307
[PubMed - in process]
Role of Gallium-67 scintigraphy in the evaluation of occult sepsis in the medical ICU.
Chen WC, Tsai KD, Chen CH, Lin MS, Chen CM, Shih CM, Chen W.
Intern Emerg Med. 2011 Dec 14. [Epub ahead of print]
PMID:
22167445
[PubMed - as supplied by publisher]
Susceptibility of Candida albicans to photodynamic therapy using methylene blue and toluidine blue as photosensitizing dyes.
Pupo YM, Gomes GM, Santos EB, Chaves L, Michel MD, Kozlowski VA Jr, Gomes OM, Gomes JC.
Acta Odontol Latinoam. 2011;24(2):188-92.
PMID:
22165318
[PubMed - in process]
Arsenic trioxide treatment decreases the oxygen consumption rate of tumor cells and radiosensitizes solid tumors.
Diepart C, Karroum O, Magat J, Feron O, Verrax J, Buc Calderon P, Grégoire V, Leveque P, Stockis J, Dauguet N, Jordan BF, Gallez B.
Cancer Res. 2011 Dec 2. [Epub ahead of print]
PMID:
22139377
[PubMed - as supplied by publisher]
Arsenic-Induced Straighthead: An Impending Threat to Sustainable Rice Production in South and South-East Asia!
Azizur Rahman M, Mamunur Rahman M, Hasegawa H.
Bull Environ Contam Toxicol. 2011 Dec 4. [Epub ahead of print]
PMID:
22139332
[PubMed - as supplied by publisher]
Comparative Soil Metal Analyses in Sudbury (Ontario, Canada) and Lubumbashi (Katanga, DR-Congo).
Narendrula R, Nkongolo KK, Beckett P.
Bull Environ Contam Toxicol. 2011 Dec 4. [Epub ahead of print]
PMID:
22139330
[PubMed - as supplied by publisher]
Purification, crystallization and preliminary X-ray diffraction studies of the arsenic repressor ArsR from Corynebacterium glutamicum.
Santha S, Pandaranayaka EP, Rosen BP, Thiyagarajan S.
Acta Crystallogr Sect F Struct Biol Cryst Commun. 2011 Dec 1;67(Pt 12):1616-8. Epub 2011 Nov 26.
PMID:
22139180
[PubMed - in process]
Arsenic contamination and speciation in surrounding waters of three old cinnabar mines.
Larios R, Fernández-Martínez R, Silva V, Loredo J, Rucandio I.
J Environ Monit. 2011 Dec 5. [Epub ahead of print]
PMID:
22139034
[PubMed - as supplied by publisher]
Arsenic Exposure and Hypertension: A Systematic Review.
Abhyankar LN, Jones MR, Guallar E, Navas-Acien A.
Environ Health Perspect. 2011 Dec 2. [Epub ahead of print]
PMID:
22138666
[PubMed - as supplied by publisher]
Metals in biology: defining metalloproteomes.
Yannone SM, Hartung S, Menon AL, Adams MW, Tainer JA.
Curr Opin Biotechnol. 2011 Dec 2. [Epub ahead of print]
PMID:
22138493
[PubMed - as supplied by publisher]
Total and inorganic arsenic concentrations in different species of economically important algae harvested from coastal zones of Chile.
Díaz O, Tapia Y, Muñoz O, Montoro R, Velez D, Almela C.
Food Chem Toxicol. 2011 Nov 25. [Epub ahead of print]
PMID:
22138359
[PubMed - as supplied by publisher]
Zamzam water: Concentration of trace elements and other characteristics.
Shomar B.
Chemosphere. 2011 Dec 2. [Epub ahead of print]
PMID:
22138338
[PubMed - as supplied by publisher]
Removal of methylated arsenic using a nanostructured zirconia-based sorbent: Process performance and adsorption chemistry.
Zheng YM, Yu L, Chen JP.
J Colloid Interface Sci. 2011 Oct 12. [Epub ahead of print]
PMID:
22137855
[PubMed - as supplied by publisher]
Humans seem to produce arsenobetaine and dimethylarsinate after a bolus dose of seafood.
Molin M, Ulven SM, Dahl L, Telle-Hansen VH, Holck M, Skjegstad G, Ledsaak O, Sloth JJ, Goessler W, Oshaug A, Alexander J, Fliegel D, Ydersbond TA, Meltzer HM.
Environ Res. 2011 Dec 1. [Epub ahead of print]
PMID:
22137101
[PubMed - as supplied by publisher]
A modified batch reactor system to study equilibrium-reactive transport problems.
Jeppu GP, Clement TP, Barnett MO, Lee KK.
J Contam Hydrol. 2011 Oct 20. [Epub ahead of print]
PMID:
22136983
[PubMed - as supplied by publisher]
Identification of the GST-T1 and GST-M1 Null Genotypes using High Resolution Melting Analysis.
Drobna Z, Del Razo LM, Garcia-Vargas G, Sanchez-Ramirez B, Gonzalez-Horta C, Ballinas ML, Loomis D, Styblo M.
Chem Res Toxicol. 2011 Dec 2. [Epub ahead of print]
PMID:
22136492
[PubMed - as supplied by publisher]
Uranium and trace elements in phosphate fertilizers-saudi arabia.
Khater AE.
Health Phys. 2012 Jan;102(1):63-70.
PMID:
22134079
[PubMed - in process]
Natural attenuation of arsenic in soils near a highly contaminated historical mine waste dump.
Drahota P, Filippi M, Ettler V, Rohovec J, Mihaljevic M, Sebek O.
Sci Total Environ. 2011 Nov 29. [Epub ahead of print]
PMID:
22134035
[PubMed - as supplied by publisher]
Removing arsenic from synthetic groundwater with iron electrocoagulation: An Fe and As K-edge EXAFS study.
van Genuchten CM, Addy SE, Pena J, Gadgil A.
Environ Sci Technol. 2011 Dec 1. [Epub ahead of print]
PMID:
22132945
[PubMed - as supplied by publisher]
Embryotoxicity assessment of developmental neurotoxicants using a neuronal endpoint in the embryonic stem cell test.
Baek DH, Kim TG, Lim HK, Kang JW, Seong SK, Choi SE, Lim SY, Park SH, Nam BH, Kim EH, Kim MS, Park KL.
J Appl Toxicol. 2011 Dec 1. doi: 10.1002/jat.1747. [Epub ahead of print]
PMID:
22131109
[PubMed - as supplied by publisher]
Comparing different means of signal treatment for improving the detection power in HPLC-ICP-MS.
Prikler S, Pick D, Einax JW.
Anal Bioanal Chem. 2011 Dec 1. [Epub ahead of print]
PMID:
22130722
[PubMed - as supplied by publisher]
Biological monitoring versus air monitoring strategies in assessing environmental-occupational exposure.
Jakubowski M.
J Environ Monit. 2011 Dec 1. [Epub ahead of print]
PMID:
22130625
[PubMed - as supplied by publisher]
Overexpression of alfalfa mitochondrial HSP23 in prokaryotic and eukaryotic model systems confers enhanced tolerance to salinity and arsenic stress.
Lee KW, Cha JY, Kim KH, Kim YG, Lee BH, Lee SH.
Biotechnol Lett. 2011 Nov 30. [Epub ahead of print]
PMID:
22127759
[PubMed - as supplied by publisher]
Gallium Arsenide is a semiconductor with superior electronic properties to silicon. It has a higher saturated electron velocity and higher electron mobility, allowing it to function at microwave frequencies.American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia)and follows applicable ASTM testing standards.Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement. 
Gallium is a Block P, Group 13, Period 4 element. The number of electrons in each of Gallium's shells is 2, 8, 18, 3 and its electronic configuration is [Ar] 3d10 4s2 4p1. In its elemental form gallium's CAS number is 7440-55-3. The gallium atom has a radius of 122.1.pm and it's Van der Waals radius is 187.pm. Gallium is not toxic. Gallium is one of three elements that naturally occur as a liquid at room temperature. The other two are mercury and cesium. The application of gallium that has received the most attention is the production of semiconducting compounds. Of these, the 
most
important are the compounds of gallium with antimony, arsenic or phosphor. Nowadays gallium arsenide (Ga-As) is undoubtedly the most used. This compound is used in the production of several electronic parts such as diodes and transistors, made for voltage rectification, signal amplification, etc. Other gallium arsenide applications are the semiconductor "lasing" and microwave generation and also in sensors to measure temperature, light or magnetic field. Gallium was first discovered by Hans Christian Oersted in 1825. See Gallium research below.
Arsenic is a Block P, Group 15, Period 4 element. The number of electrons in each of Arsenic's shells is 2, 8, 18, 5 and its electronic configuration is [Ar] 3d10 4s2 4p3. In its elemental form arsenic's CAS number is 1327-53-3.
The arsenic atom has a radius of 124.5.pm and it's Van der Waals radius is 185.pm. Arsenic in the organic form is not harmful but in the inorganic form it is extremely toxic even in very small amounts. Arsenic has numerous applications as a semiconductor and other electronic applications as Indium arsenide, silicon arsenide and tin arsenidea. Arsenic is finding increasing uses as a doping agent in solid-state devices such as transistors. Gallium arsenide is used as a laser material to convert electricity directly into coherent light. Arsenic is used in bronzing and for hardening and improving the sphericity of shot. Arsenic is available as metal and compounds with purities from 99% to 99.9999% (ACS grade to ultra-high purity); metals in 
the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder. Arsenic information, including Technical Data, Safety Data and its High Purity properties, research, applications and other useful facts are discussed here. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included. See Arsenic research below. 
