A 7-nm nanocolumn structure fabricated by using a ferritin iron-core mask and low-energy Cl neutral beams

2004 ◽  
Vol 84 (9) ◽  
pp. 1555-1557 ◽  
Author(s):  
Tomohiro Kubota ◽  
Tomohiro Baba ◽  
Seiji Samukawa ◽  
Hiroyuki Kawashima ◽  
Yukiharu Uraoka ◽  
...  
Keyword(s):  
Low Energy ◽  
Iron Core ◽  
Neutral Beams ◽  
Ferritin Iron

Low-damage fabrication of high aspect nanocolumns by using neutral beams and ferritin-iron-core mask

2007 ◽  
Vol 25 (3) ◽  
pp. 760 ◽  
Author(s):  
Tomohiro Kubota ◽  
Tomohiro Baba ◽  
Suguru Saito ◽  
Satoshi Yamasaki ◽  
Shinya Kumagai ◽  
...  
Keyword(s):  
Iron Core ◽  
Neutral Beams ◽  
Ferritin Iron

THE FORMATION, STRUCTURE AND DISSOLUTION OF THE FERRITIN IRON CORE STUDIED BY X-RAY ABSORPTION SPECTROSCOPY

1986 ◽  
Vol 47 (C8) ◽  
pp. C8-1155-C8-1157
Author(s):  
E. C. THEIL ◽  
D. E. SAYERS ◽  
C. Y. YANG ◽  
A. FONTAINE ◽  
E. DARTYGE
Keyword(s):  
Absorption Spectroscopy ◽  
Iron Core ◽  
X Ray ◽  
Ferritin Iron ◽  
X Ray Absorption

scholarly journals μ-1,2-Peroxobridged di-iron(III) dimer formation in human H-chain ferritin

2002 ◽  
Vol 364 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Fadi BOU-ABDALLAH ◽  
Georgia C. PAPAEFTHYMIOU ◽  
Danielle M. SCHESWOHL ◽  
Sean D. STANGA ◽  
Paolo AROSIO ◽  
...  
Keyword(s):  
Iron Oxidation ◽  
Iron Core ◽  
Intermediate Species ◽  
Direct Oxidation ◽  
Dimer Formation ◽  
Complex Species ◽  
Ferritin Iron ◽  
Human Ferritin ◽  
Mössbauer Parameters ◽  
Almost All

Biomineralization of the ferritin iron core involves a complex series of events in which H2O2 is produced during iron oxidation by O2 at a dinuclear centre, the ‘ferroxidase site’, located on the H-subunit of mammalian proteins. Rapid-freeze quench Mössbauer spectroscopy was used to probe the early events of iron oxidation and mineralization in recombinant human ferritin containing 24 H-subunits. The spectra reveal that a μ-1,2-peroxodiFe(III) intermediate (species P) with Mössbauer parameters δ (isomer shift) = 0.58mm/s and ΔEQ (quadrupole splitting) = 1.07mm/s at 4.2K is formed within 50ms of mixing Fe(II) with the apoprotein. This intermediate accounts for almost all of the iron in the sample at 160ms. It subsequently decays within 10s to form a μ-oxodiFe(III)—protein complex (species D), which partially vacates the ferroxidase sites of the protein to generate Fe(III) clusters (species C) at a reaction time of 10min. The intermediate peroxodiFe(III) complex does not decay under O2-limiting conditions, an observation suggesting inhibition of decay by unreacted Fe(II), or a possible role for O2 in ferritin biomineralization in addition to that of direct oxidation of iron(II).

A New Silicon Quantum-Well Structure with Controlled Diameter and Thickness Fabricated with Ferritin Iron Core Mask and Chlorine Neutral Beam Etching

2008 ◽  
Vol 1 ◽  
pp. 074002 ◽  
Author(s):  
Seiji Samukawa ◽  
Tomohiro Kubota ◽  
Chi-Hsien Huang ◽  
Takeshi Hashimoto ◽  
Makoto Igarashi ◽  
...  
Keyword(s):  
Quantum Well ◽  
Neutral Beam ◽  
Iron Core ◽  
Quantum Well Structure ◽  
Ferritin Iron ◽  
Neutral Beam Etching

Study of neutral-beam etching conditions for the fabrication of 7-nm-diameter nanocolumn structures using ferritin iron-core masks

2005 ◽  
Vol 23 (2) ◽  
pp. 534 ◽  
Author(s):  
Tomohiro Kubota ◽  
Tomohiro Baba ◽  
Hiroyuki Kawashima ◽  
Yukiharu Uraoka ◽  
Takashi Fuyuki ◽  
...  
Keyword(s):  
Neutral Beam ◽  
Iron Core ◽  
Ferritin Iron ◽  
Neutral Beam Etching

Coulomb-staircase observed in silicon-nanodisk structures fabricated by low-energy chlorine neutral beams

2007 ◽  
Vol 101 (12) ◽  
pp. 124301 ◽  
Author(s):  
Tomohiro Kubota ◽  
Takeshi Hashimoto ◽  
Masaki Takeguchi ◽  
Kensuke Nishioka ◽  
Yukiharu Uraoka ◽  
...  
Keyword(s):  
Low Energy ◽  
Neutral Beams ◽  
Coulomb Staircase

A comparison of an undecairon(III) complex with the ferritin iron core

1989 ◽  
Vol 36 (1) ◽  
pp. 51-62 ◽  
Author(s):  
Q.T. Islam ◽  
D.E. Sayers ◽  
E.C. Theil ◽  
S.M. Gorun
Keyword(s):  
Iron Core ◽  
Ferritin Iron
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