The impact of etching during microfabrication on the microstructure and the electrical conductivity of gadolinia-doped ceria thin films

High magnification imaging of macromolecules on metal coated biological specimens is limited only by wet preparation procedures since recently obtained instrumental resolution allows visualization of topographic structures as smal l as 1-2 nm. Details of such dimensions may be visualized if continuous metal films with a thickness of 2 nm or less are applied. Such thin films give sufficient contrast in TEM as well as in SEM (SE-I image mode). The requisite increase in electrical conductivity for SEM of biological specimens is achieved through the use of ligand mediated wet osmiuum impregnation of the specimen before critical point (CP) drying. A commonly used ligand is thiocarbohvdrazide (TCH), first introduced to TEM for en block staining of lipids and glvcomacromolecules with osmium black. Now TCH is also used for SEM. However, after ligand mediated osinification nonspecific osmium black precipitates were often found obscuring surface details with large diffuse aggregates or with dense particular deposits, 2-20 nm in size. Thus, only low magnification work was considered possible after TCH appl ication.

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Effect of Gamma Radiation on Structural, Optical and Electrical Properties of nanostructured CdHgTe Thin Films

Nanoscale Reports ◽

10.26524/nr1815 ◽

2018 ◽

Vol 1 (1) ◽

pp. 26-31 ◽

Cited By ~ 1

Author(s):

B Babu ◽

K Mohanraj ◽

S Chandrasekar ◽

N Senthil Kumar ◽

B Mohanbabu

Keyword(s):

Thin Films ◽

Electrical Conductivity ◽

Electrical Properties ◽

Gamma Radiation ◽

Glass Substrate ◽

Gamma Ray ◽

Optical And Electrical Properties ◽

Deposition Technique ◽

Polycrystalline Structure ◽

Dc Electrical Conductivity

CdHgTe thin films were grown onto glass substrate via the Chemical bath deposition technique. XRD results indicate that a CdHgTe formed with a cubic polycrystalline structure. The crystallinity of CdHgTe thin films is gradually deteriorate with increasing the gamma irradiation. EDS spectrums confirms the presence of Cd, Hg and Te elements. DC electrical conductivity results depicted the conductivity of CdHgTe increase with increasing a gamma ray dosage

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Effect of SWCNT-Tuball Paper on the Lightning Strike Protection of CFRPs and Their Selected Mechanical Properties

Materials ◽

10.3390/ma14113140 ◽

2021 ◽

Vol 14 (11) ◽

pp. 3140

Author(s):

Kamil Dydek ◽

Anna Boczkowska ◽

Rafał Kozera ◽

Paweł Durałek ◽

Łukasz Sarniak ◽

...

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Electrical Conductivity ◽

Copper Foil ◽

Impact Resistance ◽

Mechanical Analysis ◽

Lightning Strike ◽

Single Wall Carbon Nanotubes ◽

Carbon Fibre Reinforced Polymer ◽

The Impact

The main aim of this work was the investigation of the possibility of replacing the heavy metallic meshes applied onto the composite structure in airplanes for lightning strike protection with a thin film of Tuball single-wall carbon nanotubes in the form of ultra-light, conductive paper. The Tuball paper studied contained 75 wt% or 90 wt% of carbon nanotubes and was applied on the top of carbon fibre reinforced polymer before fabrication of flat panels. First, the electrical conductivity, impact resistance and thermo-mechanical properties of modified laminates were measured and compared with the reference values. Then, flat panels with selected Tuball paper, expanded copper foil and reference panels were fabricated for lightning strike tests. The effectiveness of lightning strike protection was evaluated by using the ultrasonic phased-array technique. It was found that the introduction of Tuball paper on the laminates surface improved both the surface and the volume electrical conductivity by 8800% and 300%, respectively. The impact resistance was tested in two directions, perpendicular and parallel to the carbon fibres, and the values increased by 9.8% and 44%, respectively. The dynamic thermo-mechanical analysis showed higher stiffness and a slight increase in glass transition temperature of the modified laminates. Ultrasonic investigation after lightning strike tests showed that the effectiveness of Tuball paper is comparable to expanded copper foil.

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The impact of fluence dependent 120 MeV Ag swift heavy ion irradiation on the changes in structural, electronic, and optical properties of AgInSe2 nano-crystalline thin films for optoelectronic applications

RSC Advances ◽

10.1039/d1ra03409j ◽

2021 ◽

Vol 11 (42) ◽

pp. 26218-26227

Author(s):

R. Panda ◽

S. A. Khan ◽

U. P. Singh ◽

R. Naik ◽

N. C. Mishra

Keyword(s):

Thin Films ◽

Optical Properties ◽

Ion Irradiation ◽

Heavy Ion ◽

Swift Heavy Ion Irradiation ◽

Heavy Ion Irradiation ◽

Swift Heavy Ion ◽

Nano Crystalline ◽

Shi Irradiation ◽

The Impact

Swift heavy ion (SHI) irradiation in thin films significantly modifies the structure and related properties in a controlled manner.

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High Pressure X-ray Diffraction as a Tool for Designing Doped Ceria Thin Films Electrolytes

Coatings ◽

10.3390/coatings11060724 ◽

2021 ◽

Vol 11 (6) ◽

pp. 724

Author(s):

Sara Massardo ◽

Alessandro Cingolani ◽

Cristina Artini

Keyword(s):

Thin Films ◽

High Pressure ◽

Rare Earth ◽

Ionic Conductivity ◽

Bulk Material ◽

Threshold Temperature ◽

Doped Ceria ◽

X Ray Diffraction ◽

X Ray ◽

Rare Earth Doped

Rare earth-doped ceria thin films are currently thoroughly studied to be used in miniaturized solid oxide cells, memristive devices and gas sensors. The employment in such different application fields derives from the most remarkable property of this material, namely ionic conductivity, occurring through the mobility of oxygen ions above a certain threshold temperature. This feature is in turn limited by the association of defects, which hinders the movement of ions through the lattice. In addition to these issues, ionic conductivity in thin films is dominated by the presence of the film/substrate interface, where a strain can arise as a consequence of lattice mismatch. A tensile strain, in particular, when not released through the occurrence of dislocations, enhances ionic conduction through the reduction of activation energy. Within this complex framework, high pressure X-ray diffraction investigations performed on the bulk material are of great help in estimating the bulk modulus of the material, and hence its compressibility, namely its tolerance toward the application of a compressive/tensile stress. In this review, an overview is given about the correlation between structure and transport properties in rare earth-doped ceria films, and the role of high pressure X-ray diffraction studies in the selection of the most proper compositions for the design of thin films.

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Electrical conductivity of MoS2 thin films and graphite under continuous injection to protons

Journal of Physics Conference Series ◽

10.1088/1742-6596/1758/1/012005 ◽

2021 ◽

Vol 1758 (1) ◽

pp. 012005

Author(s):

G S Burkhanov ◽

S A Lachenkov ◽

M A Kononov ◽

A U Bashlakov ◽

D V Prosvirnin

Keyword(s):

Thin Films ◽

Electrical Conductivity ◽

Continuous Injection

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