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Access type: UnknownAuthor: search.filters.author.Ana Belén Peñaherrera Pazmiño

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    Photopolymer Flexographic Printing Plate Mold for PDMS Microfluidic Manufacture
    (MDPI AG, 2025-06-20)
    Ana Belén Peñaherrera Pazmiño
    ;
    Gustavo Iván Rosero
    ;
    Maximiliano Pérez
    ;
    Betiana Lerner
    Flexographic printing, traditionally used in the packaging industry, has emerged as a promising technology for microfluidic device fabrication due to enabling high resolution and being commercially available at a low cost compared to conventional techniques. This review explores the adaptation of a photopolymer flexographic printing plate mold (FMold) for microfluidics, examining its advantages, challenges, and applications. It offers a state-of-the-art view of the application of FMold for microfluidic systems, which offers a unique opportunity in terms of cost-effectiveness, scalability, and rapid prototyping. Applications are diverse: FMold has enabled the fabrication of microfluidic devices used in enhanced oil recovery to prepare rock-on-a-chip models, droplet generation and storage, suspension cell culture, monoclonal antibody production, complex cell differentiation pattern creation, phage screening, drug screening, cell detection, and cancer stem cell culture. Since its first appearance in 2018, FMold has been utilized in 50 publications in different laboratories around the world. Key advancements, current research trends, and future prospects are discussed to provide a comprehensive overview of this evolving tool.
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    Dielectrophoresis-based microfluidics for detection and separation of circulating tumor cells
    (Elsevier BV, 2025-06-01)
    Najafipour, Iman
    ;
    Pegah Sadeh
    ;
    Amani Ali Mohammad
    ;
    Hesam Kamyab
    ;
    Chelliapan, Shreeshivadasan
    Circulating tumor cells (CTCs) represent a critical focus in cancer research due to their potential to enable early detection, monitor disease progression, and facilitate personalized therapies. However, existing isolation techniques often face significant limitations, including low specificity, reduced recovery rates, and the inability to preserve cellular viability for downstream applications such as genetic profiling and drug testing. This review addresses a key knowledge gap in the development of efficient, label-free, and scalable technologies for CTC isolation, emphasizing the role of dielectrophoresis (DEP)-based microfluidic systems. DEP leverages the intrinsic dielectric properties of cells to enable selective and non-invasive separation, eliminating the need for surface markers and ensuring high cell integrity. The study highlights the integration of nanomaterials, such as gold nanoparticles and graphene oxide nanosheets, as a novel approach to overcome existing challenges in DEP-based platforms. These nanomaterials improve the specificity and sensitivity of CTC capture by increasing surface area and biocompatibility. Key advancements discussed include the optimization of electrode designs, tuning of electric field parameters, and innovative system configurations that enhance recovery efficiency and separation purity. The review also compares various DEP configurations, such as electrode-based, insulator-based, and contactless systems, evaluating their unique advantages and suitability for different applications. In addition to reviewing current advancements, the paper outlines future directions for the field, emphasizing the need for large-scale clinical validation to establish DEP-based systems as reliable diagnostic tools. This review provides a comprehensive framework for advancing DEP-based microfluidic platforms, offering a transformative approach for early cancer detection, personalized medicine, and the broader application of innovative diagnostic technologies in clinical settings.