Rapid, Large-Area Synthesis of Hierarchical Nanoporous Silica Hybrid Films on Flexible Substrates,Journal of the American Chemical Society

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Rapid, Large-Area Synthesis of Hierarchical Nanoporous Silica Hybrid Films on Flexible Substrates
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2016-10-07 , DOI: 10.1021/jacs.6b06947
Dong-Po Song ₁ , Aditi Naik ₁ , Shengkai Li ₁ , Alexander Ribbe ₁ , James J. Watkins ₁

Affiliation

We report a simple strategy for the creation of large-area nanoporous hybrid films of silica, carbon, and gold on polyethylene terephthalate via photothermal processing. This method enables the selective heating of light-absorbing thin films on low-temperature substrates using sub-millisecond light pulses generated by a xenon flash lamp. The film contains gold nanoparticles as the nanoheaters to convert light energy to heat, a sacrificial block copolymer surfactant to generate mesopores, and cross-linked polyhedral oligomeric silsesquioxane as the silica source to form the skeleton of the porous structure. Hierarchical porous structures are achieved in the films after photothermal treatment, with uniform mesopores (44-48 nm) on the surface and interconnected macropores (>50 nm) underneath resulting from a foaming effect during release of gaseous decomposition products. The loading of gold nanoparticles is up to 43 wt % in the product, with less than 2 wt % organic residue. This rapid and large-area process for the synthetis of porous structures is compatible with roll-to-roll manufacturing for the fabrication of flexible devices.

中文翻译：

在柔性基板上快速、大面积合成分层纳米多孔二氧化硅杂化薄膜

我们报告了一种通过光热加工在聚对苯二甲酸乙二醇酯上形成二氧化硅、碳和金的大面积纳米多孔混合膜的简单策略。这种方法能够使用氙气闪光灯产生的亚毫秒光脉冲对低温基板上的吸光薄膜进行选择性加热。该薄膜含有金纳米粒子作为纳米加热器，将光能转化为热能，牺牲嵌段共聚物表面活性剂产生介孔，交联多面体低聚倍半硅氧烷作为二氧化硅源，形成多孔结构的骨架。光热处理后的薄膜中实现了分层多孔结构，表面具有均匀的中孔 (44-48 nm) 和相互连接的大孔 (> 50 nm) 以下是由气态分解产物释放过程中的发泡效应引起的。产品中金纳米粒子的负载量高达 43 重量％，有机残留物少于 2 重量％。这种用于合成多孔结构的快速大面积工艺与用于制造柔性设备的卷对卷制造兼容。

更新日期：2016-10-07

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