This study compared the effectiveness of an acid solution and an acid gel in etching the facial surfaces of primary anterior teeth. Comparisons included: (1) microscopic examination of the quality of etched enamel surfaces, (2) microscopic examination of the formation and penetration of resin tags into the etched surface, and (3) mechanical tests of the shear strength of the enamelresin bond. T...

Soft lithographic methods based on poly(dimethylsiloxane) (PDMS) for pattern transfer are established alternatives to conventional lithographic methods. For applications in the biological sciences functionalized and structured noble metal surfaces are required. In order to allow for rapid prototyping of such gold structures a method is needed that does not change the surface chemistry. This can...

Photoresists, wafers, plating solutions, etchants and solvents ... Phone: +49 731 977343 0 www.microchemicals.eu [email protected] Etching of SiO2, Quartz, and Glasses with HF Hydrofluoric acid is the only etchant which attacks amorphous SiO2, quartz, or glasses at significant high etch rate. However, HF is not only a strong corrosive, but also highly toxic towards higher concentrations: ...

In this work an easy, reproducible and inexpensive technique for the production of solid state nanopores and micropores using silicon wafer substrate is proposed. The technique is based on control of pore formation, by neutralization etchant (KOH) with a strong acid (HCl). Thus, a local neutralization is produced around the nanopore, which stops the silicon etching. The etching process was perf...

Abstract Objective: investigation of the microshear bond strength between lithium disilicate with preheated viscous composite, flowable composite and resin cement by comparison their strength. Material method: forty five samples were prepared divided into three groups; group, group group. Materials injected custom made plastic transparent molds (2 mm height, 2 diameter) on surface discs that pr...

Photoresists, developers, remover, adhesion promoters, etchants, and solvents ... Phone: +49 731 36080-409 www.microchemicals.eu e-Mail: [email protected] Etching of SiO2, Quartz, and Glasses with HF Hydrofluoric acid is the only etchant which attacks amorphous SiO2, quartz, or glasses at significant high etch rate. However, HF is not only a strong corrosive, but also highly toxic towards...

Potassium dihydrogen phosphate (KDP) and amino acids are non-linear optical material used for laser frequency conversion. The pure and amino acids (L-arginine, L-lysine and L-alanine) doped KDP crystals were grown by slow solvent evaporation technique. The amino acid doping was confirmed by CHN analysis, paper chromatography and FTIR studies. The (100) face of pure and amino acids doped KDP cry...

We propose that the formation of zigzag structures on Si(1 1 0) during anisotropic etching is mainly a result of the formation of inhomogeneous regions in the etchant due to diffusion phenomena. In the same way as the presence of these etchant inhomogeneities results in step bunches on miscut (1 1 1) surfaces, it results in zigzags on the (1 1 0) surface. To support this proposal, we present an...