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首页> 外文期刊>Applied Surface Science >Liquids microprinting through a novel film-free femtosecond laser based technique
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Liquids microprinting through a novel film-free femtosecond laser based technique

机译：通过基于无膜飞秒激光的新型技术进行液体微印

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摘要

Laser-induced forward transfer (LIFT) is a high resolution microprinting technique in which small amounts of material are transferred from a previously prepared donor thin film to a receptor substrate. The application of LIFT to liquid donor films allows depositing complex and fragile materials in solution or suspension without compromising the integrity of the deposited material. However, the main drawback of LIFT is the preparation of the donor material in thin film form, being difficult to obtain reproducible thin films with thickness uniformity and good stability. In this work we present a laser microprinting technique that is able to overcome the drawbacks associated with the preparation of the liquid film, allowing the deposition of well-defined uniform micro-droplets with high reproducibility and resolution. The droplet transfer mechanism relies on the highly localized absorption of strongly focused femtosecond laser pulses underneath the free surface of the liquid contained in a reservoir. An analysis of the influence of laser pulse energy on the morphology of the printed droplets is carried out, revealing a clear correlation between the printed droplet dimensions and the laser pulse energy. Such correlation is interpreted in terms of the dynamics of the liquid displaced by a laser-generated cavitation bubble close to the free surface of the liquid. Finally, the feasibility of the technique for the production of miniaturized biosensors is tested.
机译：激光诱导正向转移（LIFT）是一种高分辨率微印刷技术，其中少量材料从预先准备的供体薄膜转移到受体基质上。将LIFT应用于液体供体薄膜可在溶液或悬浮液中沉积复杂易碎的材料，而不会损害沉积材料的完整性。然而，LIFT的主要缺点是制备薄膜形式的供体材料，难以获得具有厚度均匀性和良好稳定性的可复制薄膜。在这项工作中，我们提出了一种激光微印技术，该技术能够克服与液膜制备相关的缺陷，从而可以以高重现性和分辨率沉积定义明确的均匀微滴。液滴传输机制依赖于强聚焦飞秒激光脉冲在储存器中所含液体自由表面下方的高度局部吸收。进行了激光脉冲能量对打印液滴形态的影响分析，揭示了打印液滴尺寸与激光脉冲能量之间的明显相关性。这种相关性是根据由靠近液体自由表面的激光产生的空化气泡置换的液体动力学来解释的。最后，测试了该技术用于生产小型生物传感器的可行性。

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  • 来源
    《Applied Surface Science》 |2011年第12期|p.5190-5194|共5页
  • 作者

    A. Patrascioiu; M. Duocastella; J.M. Fernandez-Pradas; J.L. Morenza; P. Serra;

  • 作者单位

    Universitat de Barcelona, Departament de Fisica Aplicada i dptica, Marti i Franques 1, E-08028 Barcelona, Spain;

    Universitat de Barcelona, Departament de Fisica Aplicada i dptica, Marti i Franques 1, E-08028 Barcelona, Spain;

    Universitat de Barcelona, Departament de Fisica Aplicada i dptica, Marti i Franques 1, E-08028 Barcelona, Spain;

    Universitat de Barcelona, Departament de Fisica Aplicada i dptica, Marti i Franques 1, E-08028 Barcelona, Spain;

    Universitat de Barcelona, Departament de Fisica Aplicada i dptica, Marti i Franques 1, E-08028 Barcelona, Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    microprinting; microdroplets; user printing; microarray;

    机译：微印刷;微滴;用户印刷;微阵列;

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