Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA.
Science. 2013 Apr 19;340(6130):337-41. doi: 10.1126/science.1231391.
Mesoporous nanomaterials have attracted widespread interest because of their structural versatility for applications including catalysis, separation, and nanomedicine. We report a one-pot synthesis method for a class of mesoporous silica nanoparticles (MSNs) containing both cubic and hexagonally structured compartments within one particle. These multicompartment MSNs (mc-MSNs) consist of a core with cage-like cubic mesoporous morphology and up to four branches with hexagonally packed cylindrical mesopores epitaxially growing out of the cubic core vertices. The extent of cylindrical mesostructure growth can be controlled via a single additive in the synthesis. Results suggest a path toward high levels of architectural complexity in locally amorphous, mesostructured nanoparticles, which could enable tuning of different pore environments of the same particle for specific chemistries in catalysis or drug delivery.
介孔纳米材料因其在催化、分离和纳米医学等领域的结构多功能性而引起了广泛的关注。我们报告了一种一锅合成法，用于合成一类介孔硅纳米粒子（MSNs），其中一个粒子内包含立方和六方结构的隔室。这些多隔室 MSNs（mc-MSNs）由具有笼状立方介孔形态的核和多达四个分支组成，这些分支的六方密堆积圆柱介孔从立方核顶点外延生长。通过合成中的一种单一添加剂可以控制圆柱介观结构的生长程度。研究结果表明，在局部非晶态、介孔纳米粒子中实现高结构复杂性的途径，这可能使同一粒子的不同孔环境能够针对催化或药物输送中的特定化学物质进行调谐。
