Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN, 47907, USA.
School of Materials Engineering, Purdue University, 701 W. Stadium Avenue, West Lafayette, IN, 47907, USA.
Angew Chem Int Ed Engl. 2020 May 11;59(20):7711-7716. doi: 10.1002/anie.202000065. Epub 2020 Mar 19.
The design of functional interfaces is central to both fundamental and applied research in materials science and energy technology. We introduce a new, broadly applicable technique for the precisely controlled high-throughput preparation of well-defined interfaces containing polyatomic species ranging from small ions to nanocrystals and large protein complexes. The mass-dispersive deposition of ions onto surfaces is achieved using a rotating-wall mass analyzer, a compact device which enables the separation of ions using low voltages and has a theoretically unlimited mass range. We demonstrate an efficient deposition of singly charged Au (SC H ) ions (33.7 kDa), which opens up exciting opportunities for the structural characterization of nanocrystals and their assemblies using transmission electron microscopy. Our approach also enables the high-throughput deposition of mass-selected ions from multicomponent mixtures, which is of interest to the controlled preparation of surface gradients and rapid screening of molecules in mixtures for a specific property.
功能界面的设计是材料科学和能源技术基础研究和应用研究的核心。我们介绍了一种新的、广泛适用的技术，用于精确控制高通量制备含有原子种类的定义明确的界面，这些原子种类的范围从小离子到纳米晶体和大蛋白复合物。使用旋转壁质量分析器实现离子的质量分散沉积，这是一种紧凑的设备，它可以使用低电压分离离子，并且理论上具有无限的质量范围。我们演示了单电荷 Au（SC H ）离子（33.7 kDa）的高效沉积，这为使用透射电子显微镜对纳米晶体及其组装体进行结构表征开辟了令人兴奋的机会。我们的方法还能够实现从多组分混合物中高通量沉积质量选择的离子，这对于控制表面梯度的制备和混合物中特定性质的分子的快速筛选都很有意义。
