Stable jets of viscoelastic fluids and self-assembled cylindrical capsules by hydrodynamic focusing.

@article{Edmond2006StableJO,
  title={Stable jets of viscoelastic fluids and self-assembled cylindrical capsules by hydrodynamic focusing.},
  author={Kazem V Edmond and Andrew B. Schofield and Manuel M{\'a}rquez and Jonathan P. Rothstein and Anthony D Dinsmore},
  journal={Langmuir : the ACS journal of surfaces and colloids},
  year={2006},
  volume={22 21},
  pages={
          9052-6
        }
}
We demonstrate formation of long-lived cylindrical jets of a viscoelastic fluid using hydrodynamic focusing. A solution of polyacrylamide in water is driven coaxially with immiscible oil and subjected to strong extensional flow. At high flow rates, the aqueous phase forms jets that are 4-90 microm in diameter and several centimeters long. The liquid surfaces of these jets are then used as templates for assembly of microspheres into novel rigid and hollow cylinders. 
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