A Dendrite-Free Lithium Metal Battery by Incorporating Poly(dimethylsiloxane) Layer onto the Porous Three-Dimensional Copper Current Collector
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was prepared and tested as a cathode material with 5 V operation cell voltage. When using Ti mesh current collector, this cathode material did not exhibit good performance, due to the corrosion of Ti mesh current collector. On the other hand, material showed the excellent rechargeability and relatively high discharge capacity when using an Al current collector. A coin-type cell was also constructed to test the practical stability of this cathode material. The discharge capacity was 120 mAh g−1 and the rechargeability was 100% during 30 cycles. The average discharge potential was 4.8 V vs. This electrochemical behavior was much better than and Moreover, the 100% cycleability of this material indicates that the electrolyte decomposition does not take place on this cathode material. © 2002 The Electrochemical Society. All rights reserved.
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The current modification of polydimethylsiloxane (PDMS) substrates via oxygen plasma treatment causes surface cracks. Here, we demonstrate a method to prevent crack formation by chemical treatment. Chemical modification renders the surface hydrophilic for several days and is effective in preserving the elasticity of the PDMS surface at the nanoscale level.
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我们建议了制作在这的 microfluidic 薄片聚合物主人模子糊的 polydimethylsiloxane (PDMS ) 的一个新奇方法。方法主要包括二步。首先，不锈钢片是蚀刻形成一个金属模型的激光。然后，器官的解决方案(甲基 methacrylate )(PMMA ) poly 是 casted 到金属模型上制作将随后被用来制作 PDMS 芯片的 PMMA 主人。我们系统地研究了影响 microchannels 的表面地位的不同激光参数并且获得了优化蚀刻的参数。当扔的薄片掌握时，我们调查了并且优化，并且开发了一个方法用二个不同粘性答案形成好聚合物主人接着扔模型，并且学习可重复的复制 PMMA 的器官的答案作文。然后，我们调查了这块芯片的物理性能并且由分析玫瑰精 B 评估了有实行可能。与现在的方法相比，建议方法不在 photoresistant 并且化学蚀刻上需要影印石版术。全部制作进步简单，快便宜并且能容易被控制。仅仅几分钟被要求为 PDMS 薄片做一个金属模型，为一位 PMMA 主人的 3 个小时，和一天。
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Polydimethylsiloxane is a translucent and biologically inert silicone material used in sealants, biomedical implants and microscale lab-on-a-chip devices. Furthermore, in membrane technology, polydimethylsiloxane represents a material for separation barriers as it has high permeabilities for various gases. The facile handling of two component formulations with a silicone base material, a catalyst and a small molecular weight crosslinker makes it widely applicable for soft-lithographic replication of two-dimensional device geometries, such as microfluidic chips or micro-contact stamps. Here, we develop a new technique to directly print polydimethylsiloxane in a rapid prototyping device, circumventing the need for masks or sacrificial mold production. We create a three-dimensional polydimethylsiloxane membrane for gas–liquid-contacting based on a Schwarz-P triple-periodic minimal-surface, which is inaccessible with common machining techniques. Direct 3D-printing of polydimethylsiloxane enables rapid production of novel chip geometries for a manifold of lab-on-a-chip applications.
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Microscale chemistry
Soft Lithography
Rapid Prototyping
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A procedure is described for making layer-to-layer interconnections in polydimethylsiloxane (PDMS) microfluidic devices. Thin (∼50 μm) perforated PDMS membranes are bonded to thicker (0.1 cm or more) PDMS slabs by means of thermally cured PDMS prepolymer to form a three-dimensional (3D) channel structure, which may contain channel or valve arrays that can pass over and under one another. Devices containing as many as two slabs and three perforated membranes are demonstrated. We also present 3D PDMS microfluidic devices for display and for liquid dispensing.
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In order to overcome the disadvantages of low mass transport efficiency of oxygen to the cathode and poor performance of passive micro direct methanol fuel cells (DMFC), the structures of the cathode current collector for the passive micro DMFC have been studied. The passive micro DMFC employing the cathode current collector with the planar perforated-plate structure has been fabricated. The effect of the anode methanol concentration and the opening area ratio of the cathode on the performance has been investigated. Owing to the influence of contact resistance and oxygen mass transport, the passive micro DMFC exhibits the optimal performance when opening ratio is 50%. Furthermore, the new parallel channels structure of the cathode current collector has been proposed, and the corresponding passive micro DMFC has also been fabricated by utilizing micro precision processing technology. The test results indicate that the mass transfer of oxygen and performance stability have been improved based on the cathode current collector with the parallel channels structure compared to the conventional planar structure. Moreover, a maximum output power density of 9.7 mW/cm 2 is achieved. The above studies might be helpful for the developing and application of portable micro power systems.
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In this work a two-part polydimethylsiloxane (PDMS) ink has been developed, printed individually, and cured. The successful printing of PDMS has been used to fabricate complex 3D geometry for the first time using FRIJP.
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Inkjet Printing
3d printed
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A flexible transparent superomniphobic polydimethylsiloxane (PDMS) surface with a micropillar array has been fabricated using Si nanowires as the mould.
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