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Ultrafast Laser Synthesized Nanostructures for Controlling Cell Proliferation

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The state-of-the-art in synthesis of nanostructured cell and contra-cell surfaces relies on techniques that utilize elaborate precursor chemicals, catalysts, or vacuum conditions, and any combination thereof. Two type s of nanostructures, sodium oxide (Na2O) nanotips and silicon oxide (SiO2 nanofibers, have been fabricated on soda-lime glass using ultrafast laser ablation. Control over nanotip width was demonstrated via laser dwell time and a new tip formation mechanism is proposed. The nanofibers generated in this work display a level of nanomorphology unseen in other fiber fabrication methods. The resulting fibers show striking morphological similarity to proteins that comprise the natural extra cellular matrix. The interaction of both nanostructures with NIH 3T3 fibroblasts was explored by incubating nanostructured glass with fibroblasts over periods of 12 hours, 1 day, or 1 week. The Na2O nanotip surfaces dissolved within a day yet appeared to induce apoptosis in cells while the SiO2 nanofibers degraded over time but influenced cells to display unique, healthy characteristics such as preferential adhesion to nanofibers and increased microvilli generation. These growth-positive and growth-negative surfaces for cells could find use in novel biological testing equipment.
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Keywords: CELL PROLIFERATION; LASER SYNTHESIS; NANOSTRUCTURED MATERIALS

Document Type: Research Article

Publication date: April 1, 2015

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  • Journal of Biomedical Nanotechnology (JBN) is a peer-reviewed multidisciplinary journal providing broad coverage in all research areas focused on the applications of nanotechnology in medicine, drug delivery systems, infectious disease, biomedical sciences, biotechnology, and all other related fields of life sciences.
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