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Mecozzi L, Gennari O, Coppola S, Olivieri F, Rega R, Mandracchia B, Vespini V, Bramanti A, Ferraro P, Grilli S. Easy Printing of High Viscous Microdots by Spontaneous Breakup of Thin Fibers. ACS Appl Mater Interfaces 2018; 10:2122-2129. [PMID: 29278322 DOI: 10.1021/acsami.7b17358] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Electrohydrodynamic jetting is emerging as a successful technique for printing inks with resolutions well beyond those offered by conventional inkjet printers. However, the variety of printable inks is still limited to those with relatively low viscosities (typically <20 mPa s) due to nozzle clogging problems. Here, we show the possibility of printing ordered microdots of high viscous inks such as poly(lactic-co-glycolic acid) (PLGA) by exploiting the spontaneous breakup of a thin fiber generated through nozzle-free pyro-electrospinning. The PLGA fiber is deposited onto a partially wetting surface, and the breakup is achieved simply by applying an appropriate thermal stimulation, which is able to induce polymer melting and hence a mechanism of surface area minimization due to the Plateau-Rayleigh instability. The results show that this technique is a good candidate for extending the printability at the microscale to high viscous inks, thus extending their applicability to additional applications, such as cell behavior under controlled morphological constraints.
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Affiliation(s)
- L Mecozzi
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - O Gennari
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - S Coppola
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - F Olivieri
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
- Department of Chemical Materials and Production Engineering of the University "Federico II" , P.le Tecchio 80, 80125 Naples, Italy
| | - R Rega
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - B Mandracchia
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - V Vespini
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - A Bramanti
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - P Ferraro
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - S Grilli
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
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