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Properties of Porous Silicon Precipitated with Nickel for Gas Sensors
摘要： The preparation and properties of modified porous silicon is discussed and a proposal of a sensitive layer for a gas detector is presented. The modification is done by precipitation and electrochemical deposition of nickel. The morphology of sample surfaces is examined by atomic force microscopy and scanning electron microscopy (SEM). SEM-coupled energy dispersive spectroscopy is used to analyse the chemical composition of the samples. Magnetic response is measured with a SQUID magnetometer. Electrochemical impedance spectroscopy is used to study the sensitivity of the samples to isopropanol vapour in the presence of alternating electric current. A series of samples prepared with a higher anodic current density show higher sensitivity to isopropanol vapours in comparison to a lower anodic current.
关键词： Electrochemical Impedance Spectroscopy,Porous Silicon,Gas Sensors,SQUID,Electroless Nickel Deposition,Atomic Force Microscopy
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE XXVII International Scientific Conference Electronics (ET) - Sozopol, Bulgaria (2018.9.13-2018.9.15)] 2018 IEEE XXVII International Scientific Conference Electronics - ET - Effect of Electroless Nickel Deposition on the Breakdown Voltage of Nanoporous Aluminium Oxide
摘要： Anodic aluminium oxide films were formed in various acidic solutions and further covered by Ni and Cu coatings. Certain of them were reanodized to thicken their barrier sub-layer. As a final outcome, printed circuit board-like multi-layer structure Al/Al2O3/Ni/Cu is produced. In this case, it is clearly demonstrated that the breakdown voltage of anodic oxide depends on its overall thickness, barrier sub-layer thickness, metal coating availability as well as to some extent on pore diameter.
关键词： anodic aluminium oxide,electroless nickel deposition,breakdown voltage,reanodization
更新于2025-09-04 15:30:14