Microfluidic synthesis of monodisperse PDMS microbeads as discrete oxygen sensors

Autor:	Srinivasa R. Raghavan, Don L. DeVoe, Samuel P. Forry, Peter C. Thomas, Kunqiang Jiang
Rok vydání:	2012
Předmět:	chemistry.chemical_compound Aqueous solution Materials science Polydimethylsiloxane chemistry Microfluidics Dispersity Nanotechnology General Chemistry Condensed Matter Physics Oxygen sensor
Zdroj:	Soft Matter. 8:923-926
ISSN:	1744-6848 1744-683X
Popis:	We describe the creation of monodisperse microbeads of polydimethylsiloxane (PDMS) via a microfluidic approach. Using a flow-focusing configuration, a PDMS precursor solution is dispersed into microdroplets within an aqueous continuous phase. These droplets are collected and thermally cured off-chip into solid microbeads. Our microfluidic technique allows for direct integration of payloads into the PDMS microbeads. Specifically, we integrate an oxygen-sensitive porphyrin dye into the beads and show that the resulting structures can function as non-invasive and real-time oxygen microsensors utilizing a simple optical readout at the single-particle level.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a1a26e3e754c637b63d28e4b7ae934b7 https://doi.org/10.1039/c2sm06685h Zobrazit plný text záznamu