Surface structural evolution in iron oxide thin films.

19:30 EDT 31st July 2015 | BioPortfolio

Summary of "Surface structural evolution in iron oxide thin films."

Ordered iron oxide ultrathin films were fabricated on a single-crystal Mo(110) substrate under ultrahigh vacuum conditions by either depositing Fe in ambient oxygen or oxidizing preprepared Fe(110) films. The surface structure and electronic structure of the iron oxide films were investigated by various surface analytical techniques. The results indicate surface structural transformations from metastable FeO(111) and O-terminated Fe(2)O(3)(0001) to Fe(3)O(4)(111) films, respectively. The former depends strongly on the oxygen pressure and substrate temperature, and the latter relies mostly upon the annealing temperature. Our experimental observations are helpful in understanding the mechanisms of surface structural evolution in iron oxides. The model surfaces of Fe-oxide films, particularly O-terminated surfaces, can be used for further investigation in chemical reactions (e.g., in catalysis).

Affiliation

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, PR China.

Journal Details

This article was published in the following journal.

Name: Langmuir : the ACS journal of surfaces and colloids
ISSN: 1520-5827
Pages: 11-4

Links

PubMed Articles [18887 Associated PubMed Articles listed on BioPortfolio]

Fabrication of thin films of α-Fe2O3 via atomic layer deposition using iron bisamidinate and water under mild growth conditions.

Atomic layer deposition (ALD) has been shown to be an ex-cellent method for depositing thin films of iron oxide. With limited iron precursors available, the methods widely used require harsh condition...

Iron atom exchange between hematite and aqueous Fe(II).

Aqueous Fe(II) has been shown to exchange with structural Fe(III) in goethite without any significant phase transformation. It remains unclear, however, whether aqueous Fe(II) undergoes similar exchan...

First observation of the temperature-dependent light-induced response of Ge25As10Se65 thin films.

Ge-rich ternary chalcogenide glasses (ChGs) exhibit photobleaching (PB) when illuminated with bandgap light. This effect originates from the combined effects of intrinsic structural changes and photo-...

Morphological evolution of gyroid-forming block copolymer thin films with varying solvent evaporation rate.

In this study, we aim to examine the morphological evolution of block copolymer (BCP) nanostructured thin films through solvent evaporation at different rates for solvent swollen polystyrene-block-pol...

Uniform GaN thin films grown on (100) silicon by remote plasma atomic layer deposition.

The growth of uniform gallium nitride (GaN) thin films was reported on (100) Si substrate by remote plasma atomic layer deposition (RP-ALD) using triethylgallium (TEG) and NH3 as the precursors. The s...

Clinical Trials [1606 Associated Clinical Trials listed on BioPortfolio]

Pre-Operative Staging of Pancreatic Cancer Using Superparamagnetic Iron Oxide Magnetic Resonance Imaging (SPIO MRI)

The purpose of this research study is to see if a specific kind of MRI, called Superparamagnetic Iron Oxide Magnetic Resonance Imaging (SPIO MRI), which uses an FDA-approved contrast agent...

IDA-01 A Randomised, Open-Label, Comparative Study of Intravenous Iron Isomaltoside 1000 (Monofer®) and Iron Sucrose

The purpose of the trial is to evaluate and compare the effect of iron isomaltoside 1000 to iron sucrose in its ability to increase haemoglobin (Hb) in subjects with IDA when oral iron pre...

Structural Brain Abnormalities in Children Born Prematurely: New Detection Methods and Clinical-Pathological Correlates

The purpose of the study is to detect structural brain changes using MRI and to correlate these findings with neurodevelopmental assessments in two-year old children previously enrolled in...

Effect of Consuming Food Cooked in Iron Utensils on Iron Status in Children With Iron Deficiency Anemia (IDA)

Iron deficiency is a common problem in the world and more so in the developing countries with a prevalence of 64 % (using WHO cut-off values of Hb

The Efficacy and Safety of Iron Supplementation

Each year, 5 million packs of iron tablets are dispensed in England and Wales to treat anaemia due to iron deficiency. Iron tablets are not always easy to take. The investigators think th...

Medical and Biotech [MESH] Definitions

Iron (II,III) oxide (Fe3O4). It is a black ore of IRON that forms opaque crystals and exerts strong magnetism. The NANOPARTICLES; and MICROSPHERES of its mineral form, magnetite, have many biomedical applications.

The techniques used to produce molecules exhibiting properties that conform to the demands of the experimenter. These techniques combine methods of generating structural changes with methods of selection. They are also used to examine proposed mechanisms of evolution under in vitro selection conditions.

Iron or iron compounds used in foods or as food. Dietary iron is important in oxygen transport and the synthesis of the iron-porphyrin proteins hemoglobin, myoglobin, cytochromes, and cytochrome oxidase. Insufficient amounts of dietary iron can lead to iron-deficiency anemia.

Membrane glycoproteins found in high concentrations on iron-utilizing cells. They specifically bind iron-bearing transferrin, are endocytosed with its ligand and then returned to the cell surface where transferrin without its iron is released.

Works consisting of nonfiction films and video designed to teach, instruct, or train. (From Moving Image Materials: Genre Terms, 1988)


Advertisement
 
Advertisement
 

Searches Linking to this Article