Polymer-lipid microbubbles for biosensing and the formation of porous structures.
Polymer-lipid microbubbles for biosensing and the formation of porous structures.
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DOI:
10.1016/j.jcis.2010.01.042
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发表时间:
2010-04-15
影响因子:
9.9
通讯作者:
Lee, Abraham P.
中科院分区:
文献类型:
--
作者:
Hettiarachchi, Kanaka;Lee, Abraham P.
Polymer-lipid microbubbles (PLBs) are generated by microfluidic flow-focusing devices to form a new class of long-lasting hybrid particles. The specific PLB construct developed is an elastic gas-filled microsphere with a polydimethylsiloxane (PDMS) shell containing phospholipids conjugated to functionalized polyethyleneglycol (PEG). Digital “droplet-based” microfluidics technology enables control of particle composition, size, and polydispersity (σ < 10%). Use of PDMS as a shell component improves the functionality and stability (lifetime > 6 months) of the hybrid particles due to the thermally maneuverable solidification process. With a gas core, they serve as a template material for creating three-dimensional porous structures and surfaces, requiring no cumbersome post-processing removal steps. By adding biotinylated PEG-lipid derivatives that offer targeting capabilities, we demonstrate the immobilization of fluorescent IgG antibodies on stationary PDMS-lipid microbubbles through biotinavidin interactions and on-chip trapping for immunoassays. A PDMS-lipid composition offers several advantages such as biocompatibility and biodegradability for future in-vivo use as porous engineered scaffolds, packing materials, or delivery (i.e. therapeutic) agents with cell targeting capability.
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