In JoVE (2)
Articles by Afshin Abrishamkar in JoVE
Microfluidic Pneumatic Cages: A Novel Approach for In-chip Crystal Trapping, Manipulation and Controlled Chemical Treatment Afshin Abrishamkar1,2, Markos Paradinas3, Elena Bailo4, Romen Rodriguez-Trujillo5, Raphael Pfattner5, René M. Rossi1, Carmen Ocal5, Andrew J. deMello2, David B. Amabilino6, Josep Puigmartí-Luis1 1Empa - Swiss Federal Laboratories for Materials Science and Technology, 2Institute of Chemical and Bioengineering, Department of Chemistry and Applied Bioscience, ETH Zurich, 3ICN2-Institut Catala de Nanociencia i Nanotecnologia, 4WITec GmbH, 5Institut de Ciència de Materials de Barcelona, 6School of Chemistry, The University of Nottingham Herein, we describe the fabrication and operation of a double-layer microfluidic system made of polydimethylsiloxane (PDMS). We demonstrate the potential of this device for trapping, directing the coordination pathway of a crystalline molecular material and controlling chemical reactions onto on-chip trapped structures.
Microfluidic-based Synthesis of Covalent Organic Frameworks (COFs): A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface Afshin Abrishamkar1, David Rodríguez-San-Miguel2, Jorge Andrés Rodríguez Navarro3, Romen Rodriguez-Trujillo4, David B. Amabilino5, Ruben Mas-Ballesté2, Félix Zamora2,6,7, Andrew J. deMello1, Josep Puigmarti-Luis1 1Institute of Chemical and Bioengineering, Department of Chemistry and Applied Bioscience, ETH Zurich, 2Departamento de Química Inorgánica, Universidad Autónoma de Madrid, 3Departamento de Química Inorgánica, Universidad de Granada, 4Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), 5School of Chemistry, University of Nottingham, 6Condensed Matter Physics Center (IFMAC), Universidad Autónoma de Madrid, 7Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanociencia) We present a novel microfluidic-based method for synthesis of covalent organic frameworks (COFs). We demonstrate how this approach can be used to produce continuous COF fibers, and also 2D or 3D COF structures on surfaces.
Other articles by Afshin Abrishamkar on PubMed
Crystalline Fibres of a Covalent Organic Framework Through Bottom-up Microfluidic Synthesis Chemical Communications (Cambridge, England). Jun, 2016 | Pubmed ID: 27321768 A microfluidic chip has been used to prepare fibres of a porous polymer with high structural order, setting a precedent for the generation of a wide variety of materials using this reagent mixing approach that provides unique materials not accessible easily through bulk processes. The reaction between 1,3,5-tris(4-aminophenyl)benzene and 1,3,5-benzenetricarbaldehyde in acetic acid under continuous microfluidic flow conditions leads to the formation of a highly crystalline and porous covalent organic framework (hereafter denoted as ), consisting of fibrillar micro-structures, which have mechanical stability that allows for direct drawing of objects on a surface.
Freezing the Nonclassical Crystal Growth of a Coordination Polymer Using Controlled Dynamic Gradients Advanced Materials (Deerfield Beach, Fla.). Oct, 2016 | Pubmed ID: 27400820 A methodology that can be efficiently used to synthesize, isolate, and study out-of-equilibrium crystal structures employing controlled and diffusion-limited microfluidic environments is demonstrated. Unlike studies conducted with conventional mixing procedures in a flask, it is proven experimentally and with numerical simulations that microfluidic technologies can undoubtedly fine-tune reaction times and reagents concentration profiles; factors that enable out-of-equilibrium crystal forms to be obtained.