Microengines meet microarray technology. The transport of a target molecule toward a sensing surface can play a critical role in biodetection performance. The mixing induced by the motion of self-propelled micromotors can assist such transport and consequently enhance the performance of surface-based biosensing systems, particularly in microarray-based immunosensing that can be extended to DNA and cell analysis. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.