Under irradiation, chemical species can redistribute in ways not expected from equilibrium behavior. In oxide-dispersed ferritic alloys, the phenomenon of irradiation-induced Cr redistribution at the metal/oxide interfaces has drawn recent attention. Here, the thermal and irradiation stability of the FeCr/Y2O3 interface has been systematically studied. Trilayer thin films of 90 nm Fe - 20 at.% ...

In this study, a successful degradation of phenol was achieved by a combination of processes, ultrasonic irradiation and periodate. The effect of pH, dosage of IO4-, dosage of initial phenol and ultrasonic irradiation time on the phenol degradation were examined. Furthermore, the impacts of ion intensity on phenol degradation were examined. The findings indicated that the disgrace ratio advance...

We report the use of MeV ion-irradiation-induced plastic deformation of amorphous materials to fabricate electrodes with nanometer-sized gaps. Plastic deformation of the amorphous metal Pd(80)Si(20) is induced by 4.64 MeV O(2+) ion irradiation, allowing the complete closing of a sub-micrometer gap. We measure the evolving gap size in situ by monitoring the field emission current-voltage (I-V) c...

Atomic-scale control and manipulation of the microstructure of polycrystalline thin films during kinetically limited low-temperature deposition, crucial for a broad range of industrial applications, has been a leading goal of materials science during the past decades. Here, we review the present understanding of film growth processes—nucleation, coalescence, competitive grain growth, and recrys...

Fig. 7 Time-dependent coronal temperatures deduced from Figs. 2 and 6. The approximate location of the incident laser pulse is also shown. shown in Fig. 6 for both 0.5 and 1 ns irradiation. The on-target intensities were l o t 5 and 5 x l o T 4 Wlcmz, respectively. The deduced temperatures (0.8 to 1.8 keV) correspondvery closely to those calculated with 1 -D and 2-D hydro-codes such as LLE's LI...

P. Romero-Gomez,1 A. Palmero,1,* T. Ben,2 J. G. Lozano,2 S. I. Molina,2 and A. R. González-Elipe1 1Instituto de Ciencia de Materiales de Sevilla, CSIC/Universidad de Sevilla, c/Américo Vespucio 49, 41092 Sevilla, Spain 2Departamento de Ciencia de los Materiales e I.M. y Q.I., Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, s/n, Puerto Real, 11510 Cádiz, Spain Received 16 March...

Introduction A combined proton and carbon machines is used in Heidelberg (HIT) and will be running in Pavia, Marburg, and Kiel. In addition to proton and carbon it might be possible that several other ions can offer specific advantages which need to be investigated. In this report data from Li as lighter ion and N as heavier ion are shown. For the heavier ion, especially measurements under diff...

A single-ion microbeam facility has been constructed at the Columbia University Radiological Research Accelerator Facility. The system was designed to deliver defined numbers of helium or hydrogen ions produced by a van de Graaff accelerator, covering a range of LET from 30 to 220 keV/microm, into an area smaller than the nuclei of human cells growing in culture on thin plastic films. The beam ...

Ion beam irradiation-induced nanoporous structure formation was investigated on GaSb, InSb, and Ge surfaces via controlled point defect creation using a focused ion beam (FIB). ‎This paper compares the nanoporous structure formation under the same extent of point defect creation while changing the accelerating voltage and ion dose. Although the same number of point defects were created in each ...

Here we present the preparation of a selection of azulenium ions by hydride abstraction from photochromic 1,8a-dihydroazulenes (1,8a-DHAs) incorporating two cyano groups at C-1. The reactivity of the electrophilic tropylium ring of these molecules towards lithium triisopropylsilylacetylide was investigated. The position of attack by the nucleophile depended on the substitution pattern of the az...