scholarly journals Atomic Force and Electron Scanning Microscopy of Silicone Composites

Author(s):  
Hammat H. Valiev ◽  
Alexander N. Vlasov ◽  
Vyacheslav V. Vorobyev ◽  
Yuliya N. Karnet ◽  
Yury V. Kornev ◽  
...  
2019 ◽  
Vol 61 (12) ◽  
pp. 2375
Author(s):  
В.А. Коморников ◽  
В.В. Гребенев ◽  
И.С. Тимаков ◽  
О.Б. Зайнуллин

Composite proton-conducting materials xCs6H (HSO4) 3 (H2PO4) 4+ (1 - x) AlPO4 were obtained in the composition range (x = 0.9–0.7). The methods of x-ray phase analysis, impedance spectroscopy, electron scanning microscopy studied their physicochemical and transport properties.


Nanophotonics ◽  
2014 ◽  
Vol 3 (1-2) ◽  
pp. 19-31 ◽  
Author(s):  
Anshuman J. Das ◽  
Ravichandran Shivanna ◽  
K.S. Narayan

AbstractThe advent of optically functional materials with low-intensive processing methods is accompanied by a growing need for high resolution imaging to probe the inherent inhomogeneities in the underlying microstructure. Atomic force microscopy based techniques are typically utilized for imaging the surface of organic thin films, quantum dots and other nanomaterials with ultrahigh resolution. Several modes like conductive, Kelvin, electrostatic amongst others have been particularly successful in imaging the local current, potential and charge distribution of variety of systems. However, the functionality of photoconduction in these materials cannot be directly imaged by these modes alone. There is a requirement for a local excitation source or collection arrangement that is compatible with scanning microscopy techniques followed by a current monitoring mechanism. Near-field scanning optical microscopy (NSOM) possesses all the advantages of scanning microscopy and is capable of local excitation that overcomes the diffraction limit faced by conventional optical microscopes. Additionally, NSOM can be carried out on actual photoconductive two terminal and three terminal device structures to image local optoelectronic properties. In this review, we present the various geometries that have been demonstrated to perform photoconductive NSOM (p-NSOM). We highlight a representative set of important results and discuss the implications of photocurrent imaging in macroscopic device performance.


2009 ◽  
Vol 44 (1) ◽  
pp. 32-39
Author(s):  
Marcello Teixeira Castiglia ◽  
Juliano Voltarelli F. da Silva ◽  
José Armendir Frezarim Thomazini ◽  
José Batista Volpon

2019 ◽  
Vol 25 (S2) ◽  
pp. 1120-1121
Author(s):  
Mike Reichelt ◽  
Danielle Mandikian ◽  
Alejandro Lopez ◽  
Anand K. Katakam ◽  
Derek Smith ◽  
...  

2012 ◽  
Vol 727-728 ◽  
pp. 988-992 ◽  
Author(s):  
V. Scarpini ◽  
R.M. Pinheiro ◽  
S.N. Monteiro ◽  
C.M.F. Vieira

Densification of a precursor mixture of powders followed by drying to remove the excess of water is a necessary stage before the high temperature sintering to produce a ceramic piece. In the case of conventional red ceramics the influence of the density established during this stage has received limited attention in terms of the final product proprieties. Therefore, this work has for objective to evaluate the influence of the dry bulk density on the fired properties of red ceramics elaborated with the mixture of clays, argillite and grog. Cylindrical specimens were prepared with two different ranges of dry bulk density, 1.95-2.09 g/cm3 and 2.15-2.28 g/cm3. Specimens were fired at 1050°C in a laboratory furnace. The evaluated properties were: water absorption, diametral shrinkage and compressive strength. Microstructure of the fired ceramics was evaluated by electron scanning microscopy. Results showed that dry bulk density exercises a strong influence on the fired properties.


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