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The mask-free etching process uses the by-product of the reaction between the chemical etching solution and the etched material as the etching mask.
SEM observations and etch rate measurements were carried out as a function of the etching solution composition.
The etching process comprises two steps, which are [10] (1) the diffusion of the chemical etching solution to the surface of the material that is to be etched and (2) the reaction of the chemical etching solution with the materials.
All grain boundaries are prone to be etched to a certain threshold, that is defined by the deposition conditions and etching solution.
But, exposed to the etching solution, graphene is inevitably contaminated.
KI-I2 etching solution and 50% HNO3 were chosen to dissolve the metal layers alternatively.
After the drawing is finished and before etching, the image must be protected from the etching solution by rubbing rosin and then talcum powder on the stone.
The chemical solution treatment process included a dilute HF solution (DHF), ozone (O3) water, and buffer oxide etching solution (BOE).
To remove it, wash the surface with dilute muriatic acid (sold in paint and hardware stores) or with an etching solution sold by some of the companies that make waterproof coatings.
Immersing the sample in an etching solution of strong acid or base enlarges the fission tracks into tube-shaped holes large enough to be seen under a high-powered microscope.
During etching, the crystals develop on the surface and locally prevent contact of etching solution and NiTi base material.
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