Schematic of the microfluidic device, top view and cross section of the middle part of the microfluidic device, tumor cell labeled with the functionalized antibodies with the Fe3O4 PMNPs, surface functionalization of the Si nanowires, SEM images of the middle part of the Si substrate with well-aligned SiNWs, SEM images of the tilted view of cancer cells trapped on the nanowires substrate microfluidic channel.