Inkjet deposition of layer-by-layer assembled films.
Inkjet deposition of layer-by-layer assembled films.
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DOI：
10.1021/ja104735a
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发表时间：
2010-10-20
影响因子：
15
通讯作者：
Kotov, Nicholas A.
中科院分区：
文献类型：
--
作者：
Andres, Christine M.;Kotov, Nicholas A.
逐层组装（LBL）可以制造出具有其他方法无法比拟的优异性能的先进复合材料，但费力的沉积过程和多次浸渍循环阻碍了它们在微技术和电子产品中的应用。多个冲洗步骤为LBL多层膜提供了结构控制和热力学稳定性，但它们显著限制了它们的实际应用，并显著增加了处理时间和浪费。在这里，我们证明，通过采用喷墨技术，可以提供必要数量的LBL组件所需的薄膜建立没有多余的，消除了重复冲洗步骤的需要。这一特点使这种方法区别于所有其他公认的LBL模式。使用模型系统的带负电荷的金纳米粒子和带正电荷的聚（二烯丙基二甲基铵）氯化物，材料的稳定性，纳米级控制的厚度和颗粒覆盖范围所提供的喷墨LBL技术被证明是等于或优于与传统的浸渍周期制成的多层。还展示了使用简单的喷墨打印机快速沉积复杂金属图案的机会。基于各种组成的不溶性纳米颗粒-纳米复合物的形成的LBL沉积的加性性质为通用、多组分和非接触式图案化提供了极好的机会，用于简单地生产在先进器件中非常需要的分层图案。
Layer-by-layer assembly (LBL) can create advanced composites with exceptional properties unavailable by other means, but the laborious deposition process and multiple dipping cycles hamper their utilization in microtechnologies and electronics. Multiple rinse steps provide both structural control and thermodynamic stability to LBL multilayers but they significantly limit their practical applications and contribute significantly to the processing time and waste. Here we demonstrate that by employing inkjet technology one can deliver the necessary quantities of LBL components required for film build-up without excess, eliminating the need for repetitive rinsing steps. This feature differentiates this approach from all other recognized LBL modalities. Using a model system of negatively charged gold nanoparticles and positively charged poly(diallyldimethylammonium) chloride, the material stability, nanoscale control over thickness and particle coverage offered by the inkjet LBL technique are shown to be equal or better than the multilayers made with traditional dipping cycles. The opportunity for fast deposition of complex metallic patterns using a simple inkjet printer was also shown. The additive nature of LBL deposition based on the formation of insoluble nanoparticle-polyelectrolyte complexes of various compositions provides an excellent opportunity for versatile, multi-component, and non-contact patterning for the simple production of stratified patterns that are much needed in advanced devices.
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