Femtosecond-laser direct writing in polymers and potential applications in microfluidics and memory devices

Kallepalli, L. N. Deepak

doi:10.1117/1.oe.51.7.073402

Cited by 24 publications

(13 citation statements)

References 22 publications

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“…These features may be beneficial for the cell attachment and proliferation on PMMA modified surfaces, which make fs lasers a viable alternative to enhance biocompatibility. Deepak et al [73,75,106,107] also explored the utilization of Ti:Sapphire femtosecond lasers to produce microchannels in PMMA, and also in polystyrene (PS) for microfluidic applications (with potential biomedical applications). Peroxide-type free radicals where found along the laser treated areas.…”

Section: Other Polymersmentioning

confidence: 99%

Laser Surface Texturing of Polymers for Biomedical Applications

et al. 2018

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Polymers are materials widely used in biomedical science because of their biocompatibility, and good mechanical properties (which, in some cases, are similar to those of human tissues); however, these materials are, in general, chemically and biologically inert. Surface characteristics, such as topography (at the macro-, micro, and nano-scale), surface chemistry, surface energy, charge, or wettability are interrelated properties, and they cooperatively influence the biological performance of materials when used for biomedical applications. They regulate the biological response at the implant/tissue interface (e.g., influencing the cell adhesion, cell orientation, cell motility, etc.). Several surface processing techniques have been explored to modulate these properties for biomedical applications. Despite their potentials, these methods have limitations that prevent their applicability. In this regard, laser-based methods, in particular laser surface texturing (LST), can be an interesting alternative. Different works have showed the potentiality of this technique to control the surface properties of biomedical polymers and enhance their biological performance; however, more research is needed to obtain the desired biological response. This work provides a general overview of the basics and applications of LST for the surface modification of polymers currently used in the clinical practice (e.g., PEEK, UHMWPE, PP, etc.). The modification of roughness, wettability, and their impact on the biological response is addressed to offer new insights on the surface modification of biomedical polymers.

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Section: Other Polymersmentioning

confidence: 99%

Laser Surface Texturing of Polymers for Biomedical Applications

et al. 2018

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“…In the pursuit of simpler and direct microfabrication processes that enable surface etching or tridimensional bulk patterning in a variety of polymeric materials, high-energy short-pulsed lasers have been used to produce micro and nano patterns by single step ablation [ 1 , 2 , 3 , 4 ]. When additive processes are sought, micro/nanoparticle laser sintering has also demonstrated promising results in miniaturisation for nanotechnology rapid-prototyping [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Controlled Solvent-Free Formation of Embedded PDMS-Derived Carbon Nanodomains with Tunable Fluorescence Using Selective Laser Ablation with A Low-Power CD Laser

González-Vázquez

Hautefeuille

2017

Micromachines

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We present a study of the application of a single-step and solvent-free laser-based strategy to control the formation of polymer-derived fluorescent carbon nanodomains embedded in poly-dimethylsiloxane (PDMS) microchannels. A low-power, laser-induced microplasma was used to produce a localised combustion of a PDMS surface and confine nanocarbon byproducts within the exposed microregions. Patterns with on-demand geometries were achieved under dry environmental conditions thanks to a low-cost 3-axis CD-DVD platform motorised in a selective laser ablation fashion. The high temperature required for combustion of PDMS was achieved locally by strongly focusing the laser spot on the desired areas, and the need for high-power laser was bypassed by coating the surface with an absorbing carbon additive layer, hence making the etching of a transparent material possible. The simple and repeatable fabrication process and the spectroscopic characterisation of resulting fluorescent microregions are reported. In situ Raman and fluorescence spectroscopy were used to identify the nature of the nanoclusters left inside the modified areas and their fluorescence spectra as a function of excitation wavelength. Interestingly, the carbon nanodomains left inside the etched micropatterns showed a strong dependency on the additive materials and laser energy that were used to achieve the incandescence and etch microchannels on the surface of the polymer. This dependence on the lasing conditions indicates that our cost-effective laser ablation technique may be used to tune the nature of the polymer-derived nanocarbons, useful for photonics applications in transparent silicones in a rapid-prototyping fashion.

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“…Recently, internal processing of polymethyl methacrylate (PMMA), polydimethylsiloxane (PDMS), polystyrene (PS), and polyvinyl alcohol (PVA) polymers has also been investigated. 33 A 800 nm Ti:sapphire laser with a maximum pulse energy of 1 mJ was used in this work.…”

Section: Direct Internal 3d Laser Writing Fabrication Methodsmentioning

confidence: 99%

Advances in three-dimensional rapid prototyping of microfluidic devices for biological applications

et al. 2014

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The capability of 3D printing technologies for direct production of complex 3D structures in a single step has recently attracted an ever increasing interest within the field of microfluidics. Recently, ultrafast lasers have also allowed developing new methods for production of internal microfluidic channels within the bulk of glass and polymer materials by direct internal 3D laser writing. This review critically summarizes the latest advances in the production of microfluidic 3D structures by using 3D printing technologies and direct internal 3D laser writing fabrication methods. Current applications of these rapid prototyped microfluidic platforms in biology will be also discussed. These include imaging of cells and living organisms, electrochemical detection of viruses and neurotransmitters, and studies in drug transport and induced-release of adenosine triphosphate from erythrocytes. V C 2014 AIP Publishing LLC. [http://dx

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Femtosecond-laser direct writing in polymers and potential applications in microfluidics and memory devices

Cited by 24 publications

References 22 publications

Laser Surface Texturing of Polymers for Biomedical Applications

Laser Surface Texturing of Polymers for Biomedical Applications

Controlled Solvent-Free Formation of Embedded PDMS-Derived Carbon Nanodomains with Tunable Fluorescence Using Selective Laser Ablation with A Low-Power CD Laser

Advances in three-dimensional rapid prototyping of microfluidic devices for biological applications

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