Three-Dimensional Nanoprinting via Direct Delivery
Three-Dimensional Nanoprinting via Direct Delivery
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DOI：
10.1021/acs.jpcb.7b06978
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发表时间：
2018-01-18
影响因子：
3.3
通讯作者：
Liu, Gang-yu
中科院分区：
文献类型：
--
作者：
de Souza, Joao Ventrici;Liu, Yang;Liu, Gang-yu
直接写入方法是一种通用且简单的方法，用于在三维（3D）中产生设计结构。打印是通过喷嘴挤出打印材料来实现的，喷嘴提供了一个平台来提供各种材料。虽然这种方法已被常规用于宏观尺度的3D打印，但微型化到微米和纳米尺度以及在多维尺度上构建分层结构代表了研究和开发的新挑战。目前的工作通过结合原子力显微镜（AFM）的空间精度和微流体的局部递送能力来解决这些挑战。专用AFM探针具有显微镜尖端和输送工具的双重作用，通过直接材料输送实现3D打印的小型化。逐层印刷20 μ m周期性的堆叠网格，覆盖1mm × 1mm的区域。空间保真度被测量为几纳米，这是3D打印中最高的。结果清楚地证明了实现具有纳米特征尺寸和实际吞吐量和总体尺寸的精度的高精度3D纳米打印的可行性。这项工作为3D分层纳米结构的高级应用铺平了道路。
Direct writing methods are a generic and simple means to produce designed structures in three dimensions (3D). The printing is achieved by extruding printing materials through a nozzle, which provides a platform to deliver a wide range of materials. Although this method has been routinely used for 3D printing at macroscopic scales, miniaturization to micrometer and nanometer scales and building hierarchical structures at multidimensional scales represent new challenges in research and development. The current work addresses these challenges by combining the spatial precision of atomic force microscopy (AFM) and local delivery capability of microfluidics. Specialized AFM probes serve dual roles of a microscopy tip and a delivery tool, enabling the miniaturization of 3D printing via direct material delivery. Stacking grids of 20 mu m periodicity were printed layer-by-layer covering 1 mm x 1 mm regions. The spatial fidelity was measured to be several nanometers, which is among the highest in 3D printing. The results clearly demonstrate the feasibility of achieving high precision 3D nanoprinting with nanometer feature size and accuracy with practical throughput and overall size. This work paves the way for advanced applications of 3D hierarchical nanostructures.