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Viscosity Gradient as a Novel Mechanism for the Centrifugation‐Based Separation of Nanoparticles
Author(s) -
Qiu Penghe,
Mao Chuanbin
Publication year - 2011
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201102636
Subject(s) - library science , citation , chemistry , polymer science , computer science
A novel viscosity gradient, built by stacking aqueous solutions of polyvinylpyrrolidone (PVP), is introduced to achieve precise size separation of nanoparticles. The viscosity gradient is more powerful than the conventional density gradient in separating larger nanoparticles. Nanoparticles that aggregate in PVP solutions are successfully stabilized and separated by size.