Luo Xuan, Al-Antaki Ahmed H M, Alharbi Thaar M D, Hutchison Wayne D, Zou Yi-Chao, Zou Jin, Sheehan Antony, Zhang Wei, Raston Colin L
Flinders Institute for NanoScale Science and Technology, College of Science and Engineering, and Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Adelaide, South Australia 5042, Australia.
School of PEMS, University of New South Wales, ADFA campus, Canberra BC, Australian Capital Territory 2610, Australia.
ACS Omega. 2018 Sep 14;3(9):11172-11178. doi: 10.1021/acsomega.8b01606. eCollection 2018 Sep 30.
Selective formation of only one iron oxide phase is a major challenge in conventional laser ablation process, as is scaling up the process. Herein, superparamagnetic single-phase magnetite nanoparticles of hexagonal and spheroidal-shape, with an average size of ca. 15 nm, are generated by laser ablation of bulk iron metal at 1064 nm in a vortex fluidic device (VFD). This is a one-step continuous flow process, in air at ambient pressure, with in situ uptake of the nanoparticles in the dynamic thin film of water in the VFD. The process minimizes the generation of waste by avoiding the need for any chemicals or surfactants and avoids time-consuming purification steps in reducing any negative impact of the processing on the environment.
在传统激光烧蚀过程中，仅选择性地形成一种氧化铁相是一项重大挑战，扩大该过程的规模也是如此。在此，通过在涡旋流体装置（VFD）中于1064nm波长下对块状铁金属进行激光烧蚀，生成了平均尺寸约为15nm的六方和球形超顺磁性单相磁铁矿纳米颗粒。这是一个在常压空气中的一步连续流动过程，纳米颗粒在VFD中动态水薄膜中原位摄取。该过程通过避免使用任何化学品或表面活性剂，最大限度地减少了废物的产生，并避免了耗时的纯化步骤，从而减少了加工过程对环境的任何负面影响。
