A high streaming potential and current were generated using a gold-nanoparticle-embedded patterned PDMS microchannel array. Gold nanoparticles with dimensions of ∼70 nm were prepared inside a hydrophobic patterned PDMS microchannel. The channel array was developed on a ridge-shaped patterned surface by performing soft lithography using UV-laser micromachining with a ridge spacing of 27.0 μm, width of 22.0 μm, and height of 16.0 μm. Subsequently, tests were conducted in which ultrapure water, solutions of 0.1 M NaCl, 0.1 M HCl and 40% H₂O₂ were passed through the patterned channel array at various flow rates and pressures using a microfluidic pump wherein the channel inlet and outlet acted as collector electrodes. A maximum streaming potential of 2.6 V, a current of 1.3 μA, and a maximum power density of 4.3 μW cm⁻² were obtained for this gold-nanoparticle-embedded PDMS channel with ultrapure water as the working fluid at an inlet pressure of 1 bar. The generated power density here was ∼256 times higher than that for the PDMS channel array without gold nanoparticles using ultrapure water as the working fluid, confirming the benefit of gold nanoparticles in the channel array, which may have potential applications in microwatt-powered lab-on-chip devices.

中文翻译：

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嵌入金纳米粒子的微通道阵列可增强发电能力。

使用嵌入金纳米粒子的图案化PDMS微通道阵列可产生高流动电位和电流。在疏水的图案化PDMS微通道中制备了尺寸约为70 nm的金纳米颗粒。通过使用脊形间距为27.0μm，宽度为22.0μm，高度为16.0μm的UV激光微加工执行软光刻，在脊形图案化的表面上显影沟道阵列。随后，进行了测试，其中使用超纯水，0.1 M NaCl，0.1 M HCl和40％H ₂ O _2的溶液使用微流体泵以不同的流速和压力使图案的通道通过图案化的通道阵列，其中通道的入口和出口用作集电极。以1 bar的入口压力将超纯水作为工作流体的金纳米颗粒嵌入式PDMS通道获得的最大流电势为2.6 V，电流为1.3μA，最大功率密度为4.3μWcm ^-2。与没有使用超纯水作为工作流体的金纳米颗粒的PDMS通道阵列相比，此处产生的功率密度高约256倍，证实了金纳米颗粒在通道阵列中的优势，这可能在微瓦动力实验室中具有潜在的应用。片上设备。