Paper-Based Active Tactile Sensor Array
Paper-Based Active Tactile Sensor Array
复制标题
纸基主动触觉传感器阵列
DOI：
10.1002/adma.201502470
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发表时间：
2015
影响因子：
29.4
通讯作者：
Jun Zhou
中科院分区：
文献类型：
--
作者：
Q. Z. Zhong;J. W. Zhong;X. F. Cheng;X. Yao;B. Wang;W. B. Li;N. Wu;K. Liu;L. Huang;B. Hu;Jun Zhou
DOI：10.1002/adma. 201502470夹层PP压电驻极膜同时发挥着触觉传感和发电的重要作用，而与电子集成的纸张[17，39-46]可以将电子应用扩展到现有电子产品之外，例如切割成定制电子产品，而传感像素可以通过印刷电极图案进行大规模调整。在这项研究中，触觉信息，包括位置和压力的PATSA设备可以通过分析的输出电压信号的实时记录路由。该器件在5 Hz激励下具有0.35 VN− 1的良好动态灵敏度，传感面积为3× 3 mm 2，以及前所未有的耐久性性能。研究结果还表明，寻找具有较低弹性模量的类透镜结构材料可以有效地提高探测灵敏度。此外，PATSA作为一个计算器在本研究中演示。值得注意的是，PATSA在削减部分区域的同时仍然保持功能。因此，我们可以预见，PATSA的出现将向定制形状适应性触摸设备迈出重要一步。所设计的PATSA的制造开始于在涂有聚乙烯（PE）带的纸基底上印刷平行电极，所述聚乙烯（PE）带用于防止由于纸的多孔性而吸收银墨水。Ag电极图案可以由Dimatix 2831打印机（Fujifilm Dimatix）自动控制，如图1a所示。然后将PP压电驻极体夹在纸基板上的两个相互垂直的Ag电极组之间，形成2D网格，如图1 B所示。顶部和底部电极之间的重叠可以被认为是像素。这种方法的拓扑结构是需要最少数量的电极来路由像素。对于随后的分析，我们将顶部和底部平行Ag电极组分别定义为纵向和横向方向，如图1 B的放大插图所示。图1 B左下角所示的原型PATSA照片显示，我们的设备具有与灵活应用相结合的能力。纸和Ag电极的扫描电子显微镜（SEM）图像在图S1 a-c（支持信息）中进行了表征，显示Ag电极牢固粘附在PE膜上。为了确认Ag电极导电性能的稳定性，这是确保其使用的相当必要的因素，设计了系统的实验，其中连续施加5 N的周期性力以10 Hz的频率垂直撞击PATSA像素中的一个。Keithley 2400设备每半小时监测的典型数据如图1 c所示，Ag电极的相对薄层电阻为0.48 Ω sq− 1，厚度为1.5 µm，如图S2（支持信息）所示。研究表明，银电极的电导率在90 000次循环刺激后仍表现出很好的稳定性，且变化很小。基于对人工智能的迫切需求，开发能够模仿人体器官感知非结构化环境的人工电子皮肤（e-skin）具有重要意义。[1-16]最近，许多团队都为这一进步做出了贡献，特别是在人工触觉电子皮肤方面，其中大部分主要集中在晶体管[4，8]压阻[2，13]或电容传感器阵列上。[10尽管在追求高灵敏度[1，2，9]和可拉伸性方面取得了这些成就，[10，11，14]在定制特征上的电子皮肤几乎没有取得进展。由于他们的…
DOI: 10.1002/adma. 201502470 the sandwiched PP piezoelectret film plays the important roles of tactile sensing and power generation simultaneously, and the paper integrated with electronics [17, 39–46] can extend electronic applications beyond existing electronics, like being cut into customized electronics, while the sensing pixels can be adjusted by printed electrode patterns in a large scale. In this study, the tactile information including the position and pressure for the PATSA device could be routed by the analysis of the real-time recording of the output voltage signals. The device exhibits a good dynamic sensitivity of 0.35 VN− 1 with a sensing area of 3× 3 mm 2 under a 5 Hz stimuli and unprecedented durability performance. It can also be foreseen from this work that seeking lens-like structure materials with lower elastic modulus can effectively raise the detection sensitivity. In addition, the PATSA acted as a calculator is demonstrated in this study. Notably, the PATSA still remains functional while cutting down partial areas. Thereby, we can envision that the advent of the PATSA will push forward a significant step toward the customized shape-adaptable touch device. The fabrication of the designed PATSA began with the printed parallel electrodes on paper substrates coated by polyethylene (PE) tape which was used to prevent the Ag ink from being absorbed due to the porosity of paper. The Ag electrode patterns could be voluntarily controlled by a Dimatix 2831 printer (Fujifilm Dimatix) as illustrated in Figure 1a. Then the PP piezoelectret is sandwiched between the two mutually perpendicular Ag electrode sets on the paper substrate, forming the 2D grid, as illustrated in Figure 1 b. The overlap between the top and bottom electrodes could be considered as a pixel. The topology of this approach is in requiring a minimum number of electrodes to route a pixel. For subsequent analysis, we define the top and bottom parallel Ag electrode set as longitudinal and latitudinal directions, respectively, shown in the enlarged inset of Figure 1 b. The prototype PATSA photograph illustrated in the lower-left corner of Figure 1 b reveals that our device has the capability in combining with flexible applications. The scanning electron microscope (SEM) images of paper as well as Ag electrode were characterized in Figure S1a–c (Supporting Information), showing Ag electrode was adhered strongly on the PE film. In order to confirm the stability of Ag electrode conductivity performance which was a rather essential factor to ensure its usage, a systematically experiment was designed, where a periodic force of 5 N was continuously applied to perpendicularly hit one of the PATSA pixels with a frequency of 10 Hz. The typical data monitored in each half an hour by Keithley 2400 device were plotted in Figure 1 c and the relative sheet resistance of the Ag electrode is≈ 0.48 Ω sq− 1 with a thickness of≈ 1.5 µm as shown in Figure S2 (Supporting Information). It is clearly found that the Ag electrode conductivity shows great stability with minimal change after 90 000 cycles stimulation, Motivated by the urgent demand for advanced artificial intelligence, the development of the artificial electronic skin (e-skin) that can mimic human organ to sense the unstructured environment is of profound interest.[1–16] Recently, many groups have contributed the advancement, particularly in artificial tactile e-skins, most of which are mainly focused on transistor,[4, 8] piezoresistive [2, 13] or capacitive sensor arrays.[10, 11] Despite these achievements in pursuing high sensitivity [1, 2, 9] and stretchability,[10, 11, 14] little progress for e-skins on customized features has been achieved. Due to their …