Tu Qiaomiao, Poerschke David L, Kortshagen Uwe R
Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA.
Nanomaterials (Basel). 2024 Jan 26;14(3):264. doi: 10.3390/nano14030264.
Nanoscale metallic titanium (Ti) offers unique energetic and biocompatible characteristics for the aerospace and biomedical industries. A rapid and sustainable method to form purified Ti nanocrystals is still in demand due to their high oxygen affinity. Herein, we report the production of highly purified Ti nanoparticles with a nonequilibrium face center cubic (FCC) structure from titanium tetrachloride (TiCl) via a capacitively coupled plasma (CCP) route. Furthermore, we demonstrate a secondary H treatment plasma as an effective strategy to improve the air stability of a thin layer of nanoparticles by further removal of chlorine from the particle surface. Hexagonal and cubic-shaped Ti nanocrystals of high purity were maintained in the air after the secondary H plasma treatment. The FCC phase potentially originates from small-sized grains in the initial stage of nucleation inside the plasma environment, which is revealed by a size evolution study with variations of plasma power input.
纳米级金属钛（Ti）为航空航天和生物医学行业提供了独特的能量特性和生物相容性。由于其对氧的高亲和力，仍需要一种快速且可持续的方法来制备纯化的Ti纳米晶体。在此，我们报告了通过电容耦合等离子体（CCP）路线由四氯化钛（TiCl）制备具有非平衡面心立方（FCC）结构的高纯度Ti纳米颗粒。此外，我们证明了二次H处理等离子体是一种有效的策略，可通过进一步去除颗粒表面的氯来提高纳米颗粒薄层的空气稳定性。经过二次H等离子体处理后，高纯度的六方和立方形状的Ti纳米晶体在空气中得以保持。FCC相可能源于等离子体环境中形核初始阶段的小尺寸晶粒，这通过等离子体功率输入变化的尺寸演化研究得以揭示。
