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Rega R, Gennari O, Mecozzi L, Pagliarulo V, Bramanti A, Ferraro P, Grilli S. Maskless Arrayed Nanofiber Mats by Bipolar Pyroelectrospinning. ACS Appl Mater Interfaces 2019; 11:3382-3387. [PMID: 30609347 DOI: 10.1021/acsami.8b12513] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The numerous advantages of micro- and nanostructures produced by electrospinning (ES) have stimulated enormous interest in this technology with potential application in several fields. However, ES still has some limitations in controlling the geometrical arrangement of the fiber mats so that expensive and time-consuming technologies are usually employed for producing ordered geometries. Here we present a technique that we call "bipolar pyroelectrospinning" (b-PES) for generating ordered arrays of fiber mats in a direct manner by using the bipolar pyroelectric field produced by a periodically poled lithium niobate crystal (PPLN). The b-PES is free from expensive electrodes, nozzles, and masks because it makes use simply of the structured pyroelectric field produced by the PPLN crystal used as collector. The results show clearly the reliability of the technique in producing a wide variety of arrayed fiber mats that could find application in bioengineering or many other fields. Preliminary results of live cells patterning under controlled geometrical constraints is also reported and discussed in order to show potential exploitation as a scaffold in tissue engineering.
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Affiliation(s)
- Romina Rega
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
| | - Oriella Gennari
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
| | - Laura Mecozzi
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
| | - Vito Pagliarulo
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
| | - Alessia Bramanti
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
- IRCCS Centro Neurolesi "Bonino-Pulejo" , Contrada Casazza SS113 , 98124 Messina , Italy
| | - Pietro Ferraro
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
| | - Simonetta Grilli
- National Research Council (CNR) , Institute of Applied Sciences & Intelligent Systems (ISASI) 'E. Caianiello' , Via Campi Flegrei 34 , 80078 Pozzuoli ( NA ), Italy
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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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