Polyelectrolyte-Graphene Oxide Multilayer Composites for Array of Microchambers which are Mechanically Robust and Responsive to NIR Light
Polyelectrolyte-Graphene Oxide Multilayer Composites for Array of Microchambers which are Mechanically Robust and Responsive to NIR Light
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DOI：
10.1002/marc.201700868
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发表时间：
2019-03-01
影响因子：
4.6
通讯作者：
Kiryukhin, Maxim, V
中科院分区：
文献类型：
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作者：
Ermakov, Alexey;Lim, Su Hui;Kiryukhin, Maxim, V
聚合物/氧化石墨烯(GO)复合材料因其独特的性能而备受关注。在这项工作中，通过在表面印有微孔图案的牺牲模板或可持续模板上进行逐层组装，成功地制备了由复合聚电解质/GO多层膜(PEGOM)制成的高度有序的中空微腔阵列。用纳米压痕和近红外吸收光谱研究了聚乙二醇单分子膜的力学和光学性质。在聚电解质多层叠层之间加入三个GO层，使微腔的杨氏模量和临界应力分别增加了5.6和2.6倍。薄膜的光学密度从波长为800 nm时的0.14逐渐降低到波长为1500 nm时的0.06。还演示了用近红外激光远程打开PEGOM微腔。所开发的结构的可能应用之一包括具有远程触发的生物组织中的微包装和递送系统。
Development of composite polymer/graphene oxide (GO) materials attracts significant attention due to their unique properties. In this work, highly ordered arrays of hollow microchambers made of composite polyelectrolyte/GO multilayers (PEGOMs) are successfully fabricated via layer-by-layer assembly on sacrificial or sustainable templates having imprinted patterns of microwells on their surface. Mechanical and optical properties of PEGOMs are studied by nanoindentation and near-infrared (NIR) absorption spectroscopy. Incorporation of three GO layers in between the polyelectrolyte multilayer stacks increases Young's modulus and critical stress of the microchambers by a factor of 5.6 and 2.6, respectively. Optical density of this PEGOM film is found to decrease gradually from 0.14 at lambda = 800 nm to 0.06 at lambda = 1500 nm. Remote opening of PEGOM microchambers with NIR laser beam is also demonstrated. One of the possible applications of the developed structures includes micropackaging and delivery systems in biological tissues with remote triggering.