Langmuir, Vol.26, No.4, 2924-2929, 2010
Molding a Silver Nanoparticle Template on Polydimethylsiloxane to Efficiently Capture Mammalian Cells
Herein, a functional template made up of in situ synthesized silver nanoparticles (AgNPs) is prepared on polydimethylsiloxane (PDMS) for the spatial control of cell capture, where the residual Si-H groups in the PDMS matrix are used as reductants to reduce AgNO3 for forming AgNPs. In virtue Of microfluidic system, a one-dimensional array pattern of AgNPs is obtained easily. Further combining with plasma treatment, a two-dimensional array pattern of AgNPs could be achieved. The obtained PDMS-AgNPs composite is characterized in detail. The PDMS-AgNPs composite shows good antibacterial property in E. coli adhesion tests. The patterns possess hifi and high resolution (ca. Spill). Cell patterns with high efficiency and spatial selectivity are Further formed with the aid of H-Arg-Gly-Asp-Cys-OH (RGDC) tetrapeptide which is grafted oil the AgNPs template. Cells immobilized oil the template show it good ability for adhesion, spreading, migration, and growth.