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. Author manuscript; available in PMC: 2012 Mar 25.
Published in final edited form as: ACS Nano. 2010 Nov 2;4(11):6973–6981. doi: 10.1021/nn102064c

Figure 1.

Figure 1

(A) Circular pnc-Si chip formatted for plastic centrifuge tube inserts. The two internal slits are areas of freestanding pnc-Si membrane. Inset: A TEM micrograph of pnc-Si membranes. Pores are white and nanocrystals are black. (B) Assembled centrifuge tube insert. (C) Schematic of hydraulic permeability test. The insert is filled with water and placed in a larger collection tube pre-filled with water. The system is spun in a centrifuge, and the volume of water that passes through the membrane is measured. Hydraulic permeability measurements are taken before the system reaches equilibrium.