Researchers build 3D-structures in silicon with the aid of gold




Scientists have developed a method of modeling three-dimensional shapes in silicon by mere use of chemical lithography. The development gives the ability to create nanostructures in silicon semiconductors.

electron plaajes spicules mesomateriaal In this particular case the nanostructures of silicon nano spines with a skeletal construction. These structures could be used in the future in stretchable bio-electronics or skin-like adhesives. To obtain this structure, the researchers used gold as a catalyst via CVD to grow silicon nanowires.

During the growth of the gold wires spreads itself over the silicon surface. By adjusting the concentration of the gold particles, think in amount of atoms, the researchers were able to influence the diffusion speed, so that they were able to select which parts of the nanowires with gold were to be coated. The gold coating then worked as a lithographic mask in the etching of the wires with potassium hydroxide.

The end result was that the researchers in their technique could print complex spines with ridges, indentations and skeletal structures by making use of chemical techniques. In combination with hydrogels that are similar to body tissue, these spines were much better than sitting “normal” needles of silicon. In this manner, possible certain implants, and other skin-like adhesives are made firmer.

The research is Thursday in the journal Science.

Update 9:33: Following post Stygeon one another and adapted and made ​​clearer


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