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Xiao & Grier, Phys. Rev. Lett. 104 , 028302 (2010)

Prismatic Optical Fractionation Precision Continuous Sorting with Sieves Made of Light David G. Grier, New York University, DMR 0855741. Colloidal particles flowing through an array of optical traps can become kinetically locked-in to symmetry-dictated directions through the array.

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Xiao & Grier, Phys. Rev. Lett. 104 , 028302 (2010)

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  1. Prismatic Optical FractionationPrecision Continuous Sorting with Sieves Made of LightDavid G. Grier, New York University, DMR 0855741 • Colloidal particles flowing through an array of optical traps can become kinetically locked-in to symmetry-dictated directions through the array. • The resulting deflection permits continuous sorting of colloidal particles with part-per-thousand resolution in particle size (ap) and refractive index (np). • Performance is monitored with holographic particle tracking and characterization. • This example shows sorting of 5,000 silica spheres (input) into two distinct fractions in quantitative agreement with theory (dashed curve). Xiao & Grier, Phys. Rev. Lett. 104, 028302 (2010)

  2. REU/PREM Summer 2010David G. Grier, New York University, DMR 0855741 • David Grier in the lab with REU/PREM students Marchelle Jones and Désirée Smith from Xavier University, together with NYU graduate student Lisa Dixon and Postdocs Hagay Shpaisman and Fook Cheong. • Students from Xavier join their faculty advisor, Prof. Anderson Sunda-Meya, for repeat visits to NYU to participate in research supported by this grant. • The summer 2010 program used techniques developed with support of this grant to launch a pilot project on biofilm microrheology. • Results are being prepared for publication with REU students as co-authors.

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