Agarwal Mohit, Zika Alexander, Schweins Ralf, Gröhn Franziska
Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials, Friedrich-Alexander Universität Erlangen-Nürnberg, Egerlandstr. 3, D-91058 Erlangen, Germany.
Institut Laue-Langevin, DS/LSS, 71 Avenue des Martyrs, F-38000 Grenoble, France.
Polymers (Basel). 2023 Dec 22;16(1):50. doi: 10.3390/polym16010050.
Electrostatic self-assembly of macroions is an emerging area with great potential in the development of nanoscale functional objects, where photo-irradiation responsiveness can either elevate or suppress the self-assembly. The ability to control the size and shape of macroion assemblies would greatly facilitate the fabrication of desired nano-objects that can be harnessed in various applications such as catalysis, drug delivery, bio-sensors, and actuators. Here, we demonstrate that a polyelectrolyte with a size of 5 nm and multivalent counterions with a size of 1 nm can produce well-defined nanostructures ranging in size from 10-1000 nm in an aqueous environment by utilizing the concept of electrostatic self-assembly and other intermolecular non-covalent interactions including dipole-dipole interactions. The - and photoresponsiveness of polyelectrolytes and azo dyes provide diverse parameters to tune the nanostructures. Our findings demonstrate a facile approach to fabricating and manipulating self-assembled nanoparticles using light and neutron scattering techniques.
大离子的静电自组装是一个在纳米级功能物体开发中具有巨大潜力的新兴领域，其中光照射响应性既可以增强也可以抑制自组装。控制大离子聚集体的尺寸和形状的能力将极大地促进所需纳米物体的制造，这些纳米物体可用于催化、药物递送、生物传感器和致动器等各种应用。在这里，我们证明，通过利用静电自组装概念以及包括偶极 - 偶极相互作用在内的其他分子间非共价相互作用，尺寸为5纳米的聚电解质和尺寸为1纳米的多价抗衡离子可以在水性环境中产生尺寸范围为10 - 1000纳米的明确定义的纳米结构。聚电解质和偶氮染料的光响应性提供了多种参数来调节纳米结构。我们的研究结果展示了一种使用光和中子散射技术制造和操纵自组装纳米颗粒的简便方法。
