Effect of Substrates on Femtosecond Laser Pulse-Induced Reductive Sintering of Cobalt Oxide Nanoparticles.
Effect of Substrates on Femtosecond Laser Pulse-Induced Reductive Sintering of Cobalt Oxide Nanoparticles.
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DOI：
10.3390/nano11123356
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发表时间：
2021-12-10
期刊：
影响因子：
--
通讯作者：
Tumkin II
中科院分区：
文献类型：
--
作者：
Mizoshiri M;Yoshidomi K;Darkhanbaatar N;Khairullina EM;Tumkin II
钴/氧化钴复合材料的直接写入技术因其在微传感器催化剂和探测器方面的潜在应用而备受关注。在这项研究中，通过飞秒激光还原烧结Co3O4纳米粒子，在环境气氛中选择性地在玻璃、聚萘二甲酸乙二醇酯（PEN）和聚对苯二甲酸乙二醇酯（PET）衬底上形成钴基复合图案。Co3O4纳米颗粒油墨，包括纳米颗粒，乙二醇作为还原剂，聚乙烯吡咯烷酮作为分散剂，被自旋涂覆在衬底上。然后，近红外飞秒激光脉冲被聚焦并扫描在油墨薄膜上形成图案。随后将未烧结的纳米颗粒从衬底上去除。利用不同的脉冲能量和扫描速度，在玻璃基板上制备了Co/CoO/Co3O4复合材料，并在PEN和PET基板上制备了Co/CoO/Co3O4复合材料。这些结果表明，与玻璃基板上的图案相比，具有低热阻的聚合物基板在还原烧结过程中更容易与油墨发生反应并氧化图案。这种钴/氧化钴复合材料的直接写入技术可用于功能性微传感器中催化剂和探测器的空间选择性打印。
Direct writing of cobalt/cobalt oxide composites has attracted attention for its potential use in catalysts and detectors in microsensors. In this study, cobalt-based composite patterns were selectively formed on glass, polyethylene naphthalate (PEN), and polyethylene terephthalate (PET) substrates via the femtosecond laser reductive sintering of Co3O4 nanoparticles in an ambient atmosphere. A Co3O4 nanoparticle ink, including the nanoparticles, ethylene glycol as a reductant, and polyvinylpyrrolidone as a dispersant, was spin-coated onto the substrates. Near-infrared femtosecond laser pulses were then focused and scanned across the ink films to form the patterns. The non-sintered nanoparticles were subsequently removed from the substrate. The resulting sintered patterns were found to be made up of Co/CoO composites on the glass substrates, utilizing various pulse energies and scanning speeds, and the Co/CoO/Co3O4 composites were fabricated on both the PEN and PET substrates. These results suggest that the polymer substrates with low thermal resistance react with the ink during the reductive sintering process and oxidize the patterns more easily compared with the patterns on the glass substrates. Such a direct writing technique of cobalt/cobalt oxide composites is useful for the spatially selective printing of catalysts and detectors in functional microsensors.
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DOI：
10.3390/ma14123285
发表时间：
2021-06-14
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
Mizoshiri M;Yoshidomi K
通讯作者：
Yoshidomi K
影响因子：
3.4
作者：
Mizoshiri M;Nishitani K;Hata S
通讯作者：
Hata S
影响因子：
3.4
作者：
Ha NP;Ohishi T;Mizoshiri M
通讯作者：
Mizoshiri M
影响因子：
2.3
作者：
Mizoshiri, Mizue;Arakane, Shun;Hata, Seiichi
通讯作者：
Hata, Seiichi
影响因子：
1.5
作者：
Mizoshiri, Mizue;Mikami, Masashi;Ozaki, Kimihiro
通讯作者：
Ozaki, Kimihiro