Microfluidics and Nanofluidics is an international peer-reviewed journal that aims to publish papers in all aspects of microfluidics, nanofluidics and lab-on-a-chip science and technology. The journal broadly interprets microfluidics and nanofluidics as the studies of mass (including molecular and colloidal) and momentum transfer, heat transfer, and reactive processes coupled with transport in microscale and nanoscale systems. Topics covered in this journal include: Theoretical modeling, numerical simulation and experimental studies of microscale and nanoscale transport phenomena and processes; The engineering and design of microfluidic and nanofluidic lab-on-a-chip devices and technology; Physicochemical phenomena associated with microfluidics and nanofluidics including interfacial, electrokinetic and colloidal processes; Coupling of mass and momentum microtransport with electromagnetic forces including electrohydrodynamics and magnetohydrodynamics; Flow diagnostic techniques in microfluidics and nanofluidics; Applications of MEMS fluidic systems including sensors and actuators; Control and manipulation of microfluidic and nanofluidic processes for lab-on-a-chip devices; Integration of photonic technology and devices with micro- and nano-fluidics. The journal publishes brief communications, research papers and topical reviews.