Hafnium Acetate Solutions are moderate to highly concentrated liquid solutions of Hafnium Acetate. They are an excellent source of Hafnium Acetate for applications requiring solubabilzed materials. American Elements can prepare dissolved homogenous solutions at customer specified concentrations or to the maximum stoichiometric concentration. Packaging is available in 55 gallon drums, smaller units and larger liquid totes. American Elements maintains solution production facilities in the United States, Northern Europe (Liverpool, UK), Southern Europe (Milan, Italy), Australia and China to allow for lower freight costs and quicker delivery to our customers. .American Elements metal and rare earth compound solutions have numerous applications, but are commonly used in petrochemical cracking and automotive catalysts, water treatment, plating, textiles, research and in optic, laser, crystal and glass applications. Ultra high purity and high purity compositions improve both optical quality and usefulness as scientific standards. Nanoscale (See also Nanotechnology Information and Quantum Dots) elemental powders and suspensions, as alternative high surface area forms, may be considered. We also produce Hafnium Acetate Powder.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.
Hafnium is a Block D, Group 4, Period 6 element. The number of electrons in each of Hafnium's shells is 2, 8, 18, 32, 10, 2 and its electronic configuration is [Xe] 4f14 5d2 6s2. In its elemental form hafnium's CAS number is 7440-58-6.The hafnium atom has a radius of 156.4.pm and it's Van der Waals radius is 200.pm. Hafnium is not toxic. Hafnium is one of the Group IV transition elements that is refined from various zirconic mineral deposits. Hafnium 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. It's primary uses are due to its ability as a nuclear "getter" or absorber of neutrons. It is a primary component in nuclear control rods for this purpose. It also finds uses as a dopant in the alloy of steel and titanium. It is also used in the production of mantles for high intensity incandescent lamps. Hafnium is replacing polysilicon as the principle gate or electrode material in metaloxide semiconductor field effect transistors (MOSFETs) which are the basis for all modern semiconductors. As semiconductors have gotten smaller, the limiting factor in further size reduction has been the ability of the silicon oxide gate to perform below 10 angstroms where leakage occurs. Recent research has been devoted to the development of High-k materials which can function as a di-electric barrier or gate with lower leakage. Using hafnium based alloys as this di-electric gate has allowed for the development of MOSFET gates smaller than 10 angstroms. This allows for further size reduction, reduced switching power requirements and improved performance. Hafnium was first discovered by Dirk Coster in 1923. See Hafnium research below.
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.
Fluorescence Signaling of Zr(4+) by Hydrogen Peroxide Assisted Selective Desulfurization of Thioamide.
Hwang J, Choi MG, Eor S, Chang SK.
Inorg Chem. 2012 Jan 19. [Epub ahead of print]
PMID:
22260347
[PubMed - as supplied by publisher]
Hafnium metallocene compounds used as cathode interfacial layers for enhanced electron transfer in organic solar cells.
Park K, Oh S, Jung D, Chae H, Kim H, Boo JH.
Nanoscale Res Lett. 2012 Jan 9;7(1):74. [Epub ahead of print]
PMID:
22230259
[PubMed - as supplied by publisher]
Synthesis of hafnium oxide-gold core-shell nanoparticles.
Dahal N, Chikan V.
Inorg Chem. 2012 Jan 2;51(1):518-22. Epub 2011 Dec 16.
PMID:
22221284
[PubMed - in process]
Di-?-hydroxido-bis-[tris-(4,4,4-trifluoro-1-phenyl-acetyl-acetonato-?O,O')hafnium(IV)] dimethyl-formamide disolvate.
Viljoen JA, Visser HG, Roodt A.
Acta Crystallogr Sect E Struct Rep Online. 2011 Dec 1;67(Pt 12):m1822-3. Epub 2011 Nov 25.
PMID:
22199601
[PubMed - in process]
Potential of high-Z contrast agents in clinical contrast-enhanced computed tomography.
Nowak T, Hupfer M, Brauweiler R, Eisa F, Kalender WA.
Med Phys. 2011 Dec;38(12):6469.
PMID:
22149830
[PubMed - in process]
Ni ion release, osteoblast-material interactions, and hemocompatibility of hafnium-implanted NiTi alloy.
Zhao T, Li Y, Zhao X, Chen H, Zhang T.
J Biomed Mater Res B Appl Biomater. 2011 Nov 28. doi: 10.1002/jbm.b.31989. [Epub ahead of print]
PMID:
22121018
[PubMed - as supplied by publisher]
Electrochemical oxide nanotube formation on the Ti-35Ta-xHf alloys for dental materials.
Moon BH, Jeong YH, Choe HC.
J Nanosci Nanotechnol. 2011 Aug;11(8):7428-32.
PMID:
22103212
[PubMed - indexed for MEDLINE]
Environmentally stable flexible metal-insulator-metal capacitors using zirconium-silicate and hafnium-silicate thin film composite materials as gate dielectrics.
Meena JS, Chu MC, Wu CS, Ravipati S, Ko FH.
J Nanosci Nanotechnol. 2011 Aug;11(8):6858-67.
PMID:
22103091
[PubMed]
In situ gas phase measurements during metal alkylamide atomic layer deposition.
Maslar JE, Kimes WA, Sperling BA.
J Nanosci Nanotechnol. 2011 Sep;11(9):8226-32.
PMID:
22097559
[PubMed]
Tetra-kis(5,7-dimethyl-quinolin-8-olato-?N,O)hafnium(IV) dimethyl-formamide disolvate.
Viljoen JA, Visser HG, Roodt A.
Acta Crystallogr Sect E Struct Rep Online. 2011 Oct 1;67(Pt 10):m1428-9. Epub 2011 Sep 30.
PMID:
22058710
[PubMed]
Synthesis, characterization, and materials chemistry of Group 4 silylimides.
Cosham SD, Johnson AL, Molloy KC, Kingsley AJ.
Inorg Chem. 2011 Dec 5;50(23):12053-63. Epub 2011 Nov 4.
PMID:
22053704
[PubMed - in process]
Preparation and physical properties of early-late heterobimetallic compounds featuring Ir-M bonds (M = Ti, Zr, Hf).
Curley JJ, Bergman RG, Tilley TD.
Dalton Trans. 2012 Jan 7;41(1):192-200. Epub 2011 Oct 21.
PMID:
22020701
[PubMed - in process]
New stable aryl-substituted acyclic imino-N-heterocyclic carbene: synthesis, characterisation and coordination to early transition metals.
Larocque TG, Badaj AC, Dastgir S, Lavoie GG.
Dalton Trans. 2011 Dec 21;40(47):12705-12. Epub 2011 Oct 18.
PMID:
22006062
[PubMed - in process]
Sterically demanding hetero-substituted [2]borametallocenophanes of group IV metals: synthesis, structure and reactivity.
Braunschweig H, Dörfler R, Mies J, Oechsner A.
Chemistry. 2011 Oct 17;17(43):12101-7. doi: 10.1002/chem.201101774. Epub 2011 Sep 9.
PMID:
21905138
[PubMed]
The role of electron localization in the atomic structure of transition-metal 13-atom clusters: the example of Co13, Rh13, and Hf13.
Piotrowski MJ, Piquini P, Cândido L, Da Silva JL.
Phys Chem Chem Phys. 2011 Oct 14;13(38):17242-8. Epub 2011 Aug 30.
PMID:
21879054
[PubMed - indexed for MEDLINE]
Monte Carlo dose enhancement studies in microbeam radiation therapy.
Martínez-Rovira I, Prezadoa Y.
Med Phys. 2011 Jul;38(7):4430-9.
PMID:
21859044
[PubMed - indexed for MEDLINE]
Electronic structure characterization of La incorporated Hf-based high-k gate dielectrics by NEXAFS.
Yamamoto T, Ogawa S, Kunisu M, Tsuji J, Kita K, Saeki M, Oku Y, Arimura H, Kitano N, Hosoi T, Shimura T, Watanabe H.
J Nanosci Nanotechnol. 2011 Apr;11(4):2823-8.
PMID:
21776638
[PubMed - indexed for MEDLINE]
Oxygen-containing gas-phase diatomic trications and tetracations: ReO(z+), NbO(z+) and HfO(z+) (z=3, 4).
Brites V, Franzreb K, Harvey JN, Sayres SG, Ross MW, Blumling DE, Castleman AW Jr, Hochlaf M.
Phys Chem Chem Phys. 2011 Sep 7;13(33):15233-43. Epub 2011 Jul 15.
PMID:
21761073
[PubMed]
Tris(?-cyclo-penta-dien-yl)hafnium(III).
Burlakov VV, Arndt P, Spannenberg A, Rosenthal U.
Acta Crystallogr Sect E Struct Rep Online. 2011 May 1;67(Pt 5):m629. Epub 2011 Apr 22.
PMID:
21754338
[PubMed]
Synthesis of freestanding HfO2 nanostructures.
Kidd T, O'Shea A, Boyle K, Wallace J, Strauss L.
Nanoscale Res Lett. 2011 Apr 5;6(1):294.
PMID:
21711786
[PubMed - in process]
Recent Research & Development for Acetates
Effect of different solvent extracts of Benincasa hispida T. on experimental hypochlorhydria in rat.
Mandal U, De D, Ali KM, Biswas A, Ghosh D.
J Adv Pharm Technol Res. 2012 Jan;3(1):41-6.
PMID:
22470892
[PubMed - in process]
The effect of nitrogen enrichment on c(1)-cycling microorganisms and methane flux in salt marsh sediments.
Irvine IC, Vivanco L, Bentley PN, Martiny JB.
Front Microbiol. 2012;3:90. Epub 2012 Mar 19.
PMID:
22470369
[PubMed - in process]
PKCα phosphorylation of RhoGDI2 at Ser31 disrupts interactions with Rac1 and decreases GDI activity.
Griner EM, Churchill ME, Brautigan DL, Theodorescu D.
Oncogene. 2012 Apr 2. doi: 10.1038/onc.2012.124. [Epub ahead of print]
PMID:
22469974
[PubMed - as supplied by publisher]
Influence of precursor solvent properties on drug release rates from nanoparticle aerosol lipid matrices.
Pawar AA, Chen DR, Venkataraman C.
Int J Pharm. 2012 Mar 23. [Epub ahead of print]
PMID:
22469694
[PubMed - as supplied by publisher]
Sex hormone-binding globulin as a marker for the thrombotic risk of hormonal contraceptives.
Raps M, Helmerhorst F, Fleischer K, Thomassen S, Rosendaal F, Rosing J, Ballieux B, van Vliet H.
J Thromb Haemost. 2012 Mar 31. doi: 10.1111/j.1538-7836.2012.04720.x. [Epub ahead of print]
PMID:
22469296
[PubMed - as supplied by publisher]
Protective role of chrysin against oxidative stress in d-galactose-induced aging in an experimental rat model.
Anand KV, Mohamed Jaabir MS, Thomas PA, Geraldine P.
Geriatr Gerontol Int. 2012 Apr 2. doi: 10.1111/j.1447-0594.2012.00843.x. [Epub ahead of print]
PMID:
22469068
[PubMed - as supplied by publisher]
Modulation of Metallophilic Bonds: Solvent-Induced Isomerization and Luminescence Vapochromism of a Polymorphic Au-Cu Cluster.
Koshevoy IO, Chang YC, Karttunen AJ, Haukka M, Pakkanen TA, Chou PT.
J Am Chem Soc. 2012 Apr 2. [Epub ahead of print]
PMID:
22469012
[PubMed - as supplied by publisher]
Experiment on formulation and drug release behavior of porosity asymmetric membrane capsules in vitro.
Fu HX, Li H, Zhang FZ, Zhao YZ, Wan CW, Chen MT, Jia XC, Yan L, Sun CC, Xu YY.
Drug Dev Ind Pharm. 2012 Apr 3. [Epub ahead of print]
PMID:
22469006
[PubMed - as supplied by publisher]
An overview of the development of combined oral contraceptives containing estradiol: focus on estradiol valerate/dienogest.
Fruzzetti F, Trémollieres F, Bitzer J.
Gynecol Endocrinol. 2012 Apr 2. [Epub ahead of print]
PMID:
22468839
[PubMed - as supplied by publisher]
A novel approach to test the relative recovery of liquid-phase standard in sorbent-tube analysis of gaseous VOCs.
Kim YH, Kim KH.
Anal Chem. 2012 Apr 2. [Epub ahead of print]
PMID:
22468653
[PubMed - as supplied by publisher]
[Purification of complicated industrial organic waste gas by complex absorption].
Chen DS, Cen CP, Tang ZX, Fang P, Chen ZH.
Huan Jing Ke Xue. 2011 Dec;32(12):3680-4. Chinese.
PMID:
22468539
[PubMed - in process]
Determination of natural pesticides in fresh fruits using liquid chromatography/mass spectrometry.
Ruiz I, Morales A, Barba A, Oliva J.
J AOAC Int. 2012 Jan-Feb;95(1):238-43.
PMID:
22468366
[PubMed - in process]
Bacteria, colonic fermentation, and gastrointestinal health.
Macfarlane GT, Macfarlane S.
J AOAC Int. 2012 Jan-Feb;95(1):50-60.
PMID:
22468341
[PubMed - in process]
Effect of Vitamin E on sP-Selectin Levels in Pre-Eclampsia.
Wangkheimayum S, Kumar S, Suri V.
Indian J Clin Biochem. 2011 Apr;26(2):169-71. Epub 2011 Jan 13.
PMID:
22468044
[PubMed - in process]
Serum cystatin C levels in renal transplant recipients.
Krishnamurthy N, Arumugasamy K, Anand U, Anand CV, Aruna V, Venu G.
Indian J Clin Biochem. 2011 Apr;26(2):120-4. Epub 2010 Nov 19.
PMID:
22468036
[PubMed - in process]
Intravaginal ring delivery of tenofovir disoproxil fumarate for prevention of HIV and herpes simplex virus infection.
Mesquita PM, Rastogi R, Segarra TJ, Teller RS, Torres NM, Huber AM, Kiser PF, Herold BC.
J Antimicrob Chemother. 2012 Mar 30. [Epub ahead of print]
PMID:
22467632
[PubMed - as supplied by publisher]
Identification of pesticide transformation products in agricultural soils using liquid chromatography/quadrupole-time-of-flight mass spectrometry.
Padilla-Sánchez JA, Michael Thurman E, Plaza-Bolaños P, Ferrer I.
Rapid Commun Mass Spectrom. 2012 May 15;26(9):1091-9. doi: 10.1002/rcm.6206.
PMID:
22467459
[PubMed - in process]
Determination of organophosphorus pesticide residues in vegetables by an enzyme inhibition method using α-naphthyl acetate esterase extracted from wheat flour.
Wang JL, Xia Q, Zhang AP, Hu XY, Lin CM.
J Zhejiang Univ Sci B. 2012 Apr;13(4):267-73.
PMID:
22467368
[PubMed - in process]
MICE LACKING MACROPHAGE 12/15-LIPOXYGENASE ARE RESISTANT TO EXPERIMENTAL HYPERTENSION.
Kriska T, Cepura C, Magier D, Siangjong L, Gauthier KM, Campbell WB.
Am J Physiol Heart Circ Physiol. 2012 Mar 30. [Epub ahead of print]
PMID:
22467300
[PubMed - as supplied by publisher]
Development and validation of a UPLC-ESI-MS/MS method for the determination of N-butylscopolamine in human plasma: Application to a bioequivalence study.
Favreto WA, Pugens Pinto AM, Manfio JL, Fiametti KG, Percio MF, Santos MB.
Drug Test Anal. 2012 Mar;4(3-4):215-21. doi: 10.1002/dta.403.
Proud sponsors of Aeromat 2012. Please join us and our customers & co-sponsors Boeing and ATI on
June 18-20, 2012
in Charlotte, North Carolina
Hafnium Acetate Solutions are moderate to highly concentrated liquid solutions of Hafnium Acetate. They are an excellent source of Hafnium Acetate for applications requiring solubabilzed 
materials. American Elements can prepare dissolved homogenous solutions at customer specified concentrations or to the maximum stoichiometric concentration. Packaging is available in 55 gallon drums, smaller units and larger liquid totes. American Elements maintains solution production facilities in the United States, Northern Europe (Liverpool, UK), Southern Europe (Milan, Italy), Australia and China to allow for lower freight costs and quicker delivery to our customers. .American Elements metal and rare earth compound solutions have numerous applications, but are commonly used in petrochemical cracking and automotive catalysts, water treatment, plating, textiles, research and in optic, laser, crystal and glass applications. Ultra high purity and high purity compositions improve both optical quality and usefulness as scientific standards. Nanoscale (See also Nanotechnology Information and Quantum Dots) elemental powders and suspensions, as alternative high surface area forms, may be considered. We also produce Hafnium Acetate Powder.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.
Hafnium is a Block D, Group 4, Period 6 element. The number of electrons in each of Hafnium's shells is 2, 8, 18, 32, 10, 2 and its electronic configuration is [Xe] 4f14 5d2 6s2. In its elemental form hafnium's CAS number is 7440-58-6.The hafnium atom has a radius of 156.4.pm and it's Van der Waals radius is 200.pm. Hafnium is not toxic. Hafnium is one of the Group IV transition elements that is refined from various zirconic mineral deposits. Hafnium 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. It's primary uses are due to its ability as a nuclear "getter" or absorber of neutrons. It is a primary component in nuclear control rods for this purpose. It also finds uses as a dopant in the alloy of 
steel and 
titanium. It is also used in the production of mantles for high intensity incandescent lamps. Hafnium is replacing polysilicon as the principle gate or electrode material in metal oxide semiconductor field effect transistors (MOSFETs) which are the basis for all modern semiconductors. As semiconductors have gotten smaller, the limiting factor in further size reduction has been the ability of the silicon oxide gate to perform below 10 angstroms where leakage occurs. Recent research has been devoted to the development of High-k materials which can function as a di-electric barrier or gate with lower leakage. Using hafnium based alloys as this di-electric gate has allowed for the development of MOSFET gates smaller than 10 angstroms. This allows for further size reduction, reduced switching power requirements and improved performance. Hafnium was first discovered by Dirk Coster in 1923. See Hafnium research below.
