TABLE I.

Structures and sorting performances in symmetric contraction–expansion straight microchannels.

Target	Aspect ratio	Geometric size(contraction/expansion width × length × height)	Note	Recovery	Reference
15/7 μm particles	∼1	45 ∼ 50/200 × 100/200 × 50 ∼ 55 μm	Lower purity	75.2%/93.7%	58
15 μm particle	1	40/200 × 100/200 × 40 μm	Two stage MOFF	88.7%	59
MCF-7 cells	1	60/300 × 150/300 × 60 μm	Two stage MOFF	98.9%	22
MCF-7 cells/ MDA-MB-231 cells	1	60/300 × 150/300 × 60 μm	Four MOFF in parallel	93.75%/91.60%	60
CTCs	5	20/60 × 100/100 × 100 μm	With rare cell pinching region	85%	61
Malaria parasites/WBCs	…	30/90 × −/− × − μm	…	70.9 ± 11.4%/99.99%	62
5.5/9.9 μm particles WBCs/RBCs	∼2	45/120 × 45/500 × 21 μm	Long expansion channel	>92%/>98% 89.7%/99.8%	63
CTCs	1	60/300 × 150/300 × 60 μm	…	>80%	67
NCI-H1299 cells	2	100/400 × 200/400 × 50 μm	The shape of the cavity is a circle	>95%	64