0000000000407602

AUTHOR

Vladimir Tuboltsev

showing 4 related works from this author

Critical temperature modification of low dimensional superconductors by spin doping

2007

Ion implantation of Fe and Mn into Al thin films was used for effective modification of Al superconductive properties. Critical temperature of the transition to superconducting state was found to decrease gradually with implanted Fe concentration. it was found that suppression by Mn implantation much stronger compared to Fe. At low concentrations of implanted ions, suppression of the critical temperature can be described with reasonable accuracy by existing models, while at concentrations above 0.1 at.% a pronounced discrepancy between the models and experiments is observed.

Materials sciencechemistry.chemical_elementFOS: Physical sciences02 engineering and technology01 natural sciencesIonSuperconductivity (cond-mat.supr-con)Aluminium0103 physical sciencesMaterials ChemistryThin film010306 general physicsSpin (physics)Volume concentrationSuperconductivityCondensed Matter - Materials ScienceCondensed matter physicsCondensed Matter - SuperconductivityDopingMaterials Science (cond-mat.mtrl-sci)General Chemistry021001 nanoscience & nanotechnologyCondensed Matter Physics3. Good healthIon implantationchemistry0210 nano-technologySolid state communications
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Composition dependence ofSi1−xGexsputter yield

2005

Sputtering yields have been measured for unstrained ${\mathrm{Si}}_{1\ensuremath{-}x}{\mathrm{Ge}}_{x}$ $(x=0--1)$ alloys when bombarded with ${\mathrm{Ar}}^{+}$ ions within the linear cascade regime. Nonlinear S-shape dependence of the sputter yield as a function of the alloy composition has been revealed. The dependence is analyzed within the frameworks of the cascade theory conventionally accepted to be the most systematic to date theoretical approach in sputtering. In view of a linear composition dependence predicted for the sputter yield by the cascade theory adapted for polyatomic substrates, the nonlinearity observed in our experiments is shown to be related to the alloying effect on…

010302 applied physicsYield (engineering)Materials scienceDegree (graph theory)Polyatomic ionBinding energy02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesSurface energyElectronic Optical and Magnetic MaterialsCondensed Matter::Materials ScienceSputtering0103 physical sciencesAtomAtomic physics0210 nano-technologyEnergy (signal processing)Physical Review B
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Ion beam shaping and downsizing of nanostructures

2011

We report a new approach for progressive and well-controlled downsizing of nanostructures below the 10 nm scale. Low energetic ion beam (Ar+) is used for gentle surface erosion, progressively shrinking the dimensions with ~ 1 nm accuracy. The method enables shaping of nanostructure geometry and polishing the surface. The process is clean room / high vacuum compatible being suitable for various applications. Apart from technological advantages, the method enables study of various size phenomena on the same sample between sessions of ion beam treatment.

PhysicsCondensed Matter - Materials ScienceNanostructureIon beamCondensed Matter - Mesoscale and Nanoscale Physicsbusiness.industryMechanical EngineeringUltra-high vacuumPolishingMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesBioengineering02 engineering and technologyGeneral Chemistry021001 nanoscience & nanotechnology01 natural sciencesMechanics of Materials0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)OptoelectronicsGeneral Materials ScienceElectrical and Electronic Engineering010306 general physics0210 nano-technologybusiness
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Dynamic preparation of TiO2 films for fabrication of dye-sensitized solar cells

2006

Preparation of nanocrystalline porous titanium dioxide (TiO2) films with roll-to-roll compatible methods was studied. Gravure printing was used for spreading TiO2 paste and paper calendering for pressing TiO2 nanoparticle films. Influence of different preparation methods on performance of fabricated dye-sensitized solar cells (DSSCs) was investigated. The attained light into electricity conversion efficiency was compared with DSSCs fabricated on conductive plastic substrates by doctor-blading spreading with subsequent static pressing. The latter method achieved a light conversion efficiency as high as 5.1%. The efficiency of the cells with a gravure printed TiO2 film was found to be rather …

Conductive polymerFabricationbusiness.industryChemistrytitanium dioxideGeneral Chemical EngineeringEnergy conversion efficiencydynamic pressGeneral Physics and AstronomyGeneral ChemistryNanocrystalline materialRoll-to-roll processingCalenderingDye-sensitized solar cellchemistry.chemical_compoundcalendergravureTitanium dioxidedye-sensitized solar cellsolar cellsOptoelectronicsroll-to-rollbusiness
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