Enhancing cell packing in buckyballs by acoustofluidic activation.

Abstract:

:How to pack materials into well-defined volumes efficiently has been a longstanding question of interest to physicists, material scientists, and mathematicians as these materials have broad applications ranging from shipping goods in commerce to seeds in agriculture and to spheroids in tissue engineering. How many marbles or gumball candies can you pack into a jar? Although these seem to be idle questions they have been studied for centuries and have recently become of greater interest with their broadening applications in science and medicine. Here, we study a similar problem where we try to pack cells into a spherical porous buckyball structure. The experimental limitations are short of the theoretical maximum packing density due to the microscale of the structures that the cells are being packed into. We show that we can pack more cells into a confined micro-structure (buckyball cage) by employing acoustofluidic activation and their hydrodynamic effect at the bottom of a liquid-carrier chamber compared to randomly dropping cells onto these buckyballs by gravity. Although, in essence, cells would be expected to achieve a higher maximum volume fraction than marbles in a jar, given that they can squeeze and reshape and reorient their structure, the packing density of cells into the spherical buckyball cages are far from this theoretical limit. This is mainly dictated by the experimental limitations of cells washing away as well as being loaded into the chamber.

journal_name

Biofabrication

journal_title

Biofabrication

authors

Ren T,Steiger W,Chen P,Ovsianikov A,Demirci U

doi

10.1088/1758-5090/ab76d9

subject

Has Abstract

pub_date

2020-03-31 00:00:00

pages

025033

issue

2

eissn

1758-5082

issn

1758-5090

journal_volume

12

pub_type

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