A side wall for a rail vehicle is provided. Particles are introduced into the array of resist features, wherein the array of resist features becomes hardened. The nanowires, which have diameters of \u02dc10 nm to 100 nm and lengths of up to tens of micrometers, show ferromagnetism with Curie temperature above room temperature, and magnetoresistance up to 250 Kelvin. The device is mobile through the use of a quartet of castor wheels and also includes an adjustable reading tray that is attached to a fixed mount extending out of the top of the outer casing. The laser devices have a laser stripe configured to emit a laser beam having a cross-polarized emission state.