@article {1340225,
	title = {"Axial" Magnetic Levitation Using Ring Magnets Enables Simple Density-Based Analysis Separation, and Manipulation},
	journal = {Analytical Chemistry},
	volume = {90},
	year = {2018},
	note = {1313},
	pages = {12239-12245},
	author = {Ge, S. and Whitesides, G. M.}
}
