State Key Lab of Supramolecular Structure and Materials , College of Chemistry Jilin University , Changchun 130012 , P.R. China.
Department of Aerospace Engineering , Texas A&M University , College Station , Texas 77843-3141 , United States.
ACS Appl Mater Interfaces. 2019 Sep 25;11(38):35429-35437. doi: 10.1021/acsami.9b10917. Epub 2019 Sep 12.
A microreactor that can confine chemical reactions exclusively in tiny vessels with the volume of ∼0.015 μm is introduced. Aluminum inversed hollow nanocone arrays (IHNAs) are fabricated by a simple and efficient colloidal lithography method. Ag and Au nanoparticles (NPs), as well as polypyrrole, grow exclusively in the conic cavities under light illumination. The photocatalytic effect arising from the plasmonic enhanced electric fields (-fields) of IHNAs boosts the reactions and is in charge of the submicrometer site-selectivity. By partially inhibiting light to IHNAs, various hierarchical patterns at the macro-, micro-, and sub-microscale are obtained, inspiring a facile patterning technique by varying the light source. In addition, the Al IHNA films are transferred to flexible and curved substrates with unchanged performances, showing high flexibility for wide applications. Microreactors based on the IHNAs will contribute to the control of chemical reactions at different dimensions and offer great potentials in developing novel nanofabrication techniques.
介绍了一种能够将化学反应局限在体积约为 0.015μm 的微小容器中的微反应器。通过简单有效的胶体光刻法制备了铝反转中空纳米锥形阵列（IHNAs）。Ag 和 Au 纳米颗粒（NPs）以及聚吡咯仅在光照射下在锥形腔中生长。IHNAs 的等离子体增强电场（-场）产生的光催化效应促进了反应，并负责亚微米级的选择性。通过部分抑制光对 IHNAs 的照射，可以在宏观、微观和亚微观尺度上获得各种层次的图案，通过改变光源来实现一种简单的图案化技术。此外，Al IHNA 薄膜转移到具有不变性能的柔性和弯曲基底上，显示出广泛应用的高柔韧性。基于 IHNAs 的微反应器将有助于控制不同维度的化学反应，并为开发新型纳米制造技术提供巨大潜力。
