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untitled Acoustic Tweezing and Patterning of Concentration Fields in Microfluidics Jonas T. Karlsen* and Henrik Bruus† Department of Physics, Technical University of Denmark, DTU Physics Building 309, DK-2800 Kongens Lyngby, Denmark (Received 5 December 2016; published 24 March 2017) We demonstrate theoretically that acoustic forces acting on inhomogeneous fluids can be used to pattern and manipul