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Ultrafast Laser Synthesized Nanostructures for Controlling Cell Proliferation.

C Samarasekera, B Tan, K Venkatakrishnan

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    |August 28, 2015
    PubMed
    Summary
    This summary is machine-generated.

    Ultrafast laser ablation created sodium oxide (Na2O) nanotips and silicon oxide (SiO2) nanofibers on glass. Na2O nanotips induced cell death, while SiO2 nanofibers promoted healthy cell growth and adhesion.

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    Area of Science:

    • Materials Science
    • Biotechnology
    • Nanotechnology

    Background:

    • Current nanostructure fabrication methods often require complex chemicals, catalysts, or vacuum conditions.
    • Developing novel nanostructured surfaces is crucial for advanced biological applications.

    Purpose of the Study:

    • To fabricate and characterize sodium oxide (Na2O) nanotips and silicon oxide (SiO2) nanofibers using ultrafast laser ablation.
    • To investigate the interaction of these nanostructures with NIH 3T3 fibroblasts and assess their biological effects.

    Main Methods:

    • Fabrication of Na2O nanotips and SiO2 nanofibers on soda-lime glass via ultrafast laser ablation.
    • Characterization of nanostructure morphology and control over nanotip width using laser dwell time.
    • Incubation of nanostructured glass with NIH 3T3 fibroblasts for up to one week.

    Main Results:

    • Na2O nanotip surfaces dissolved within 24 hours and appeared to induce fibroblast apoptosis.
    • SiO2 nanofibers exhibited unique nanomorphology and degraded over time.
    • Fibroblasts cultured on SiO2 nanofibers showed preferential adhesion and increased microvilli generation, indicating healthy characteristics.

    Conclusions:

    • Ultrafast laser ablation is an effective method for creating distinct nanostructures with varying biological outcomes.
    • Na2O nanotips and SiO2 nanofibers present contrasting cell responses, suggesting potential for selective biological applications.
    • These nanostructured surfaces could be utilized in novel biological testing equipment for growth-positive and growth-negative applications.