Metal-assisted chemical etching (MACE) is widely used to fabricate micro-/nano-structured Si owing to its simplicity and cost-effectiveness. The technique of magnetically guided MACE. involving MACE with a tri-layer metal catalyst. was developed to improve etching speed as well as to adjust the etching direction using an external magnetic field. https://fitnessgravesyardes.shop/product-category/kit-retrofit/