Rapid separation of nanodiamond particles by viscosity gradient centrifugation
- PDF / 2,118,069 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 60 Downloads / 138 Views
ORIGINAL ARTICLE
Rapid separation of nanodiamond particles by viscosity gradient centrifugation Jiaying Qu1 · Jean Felix Mukerabigwi1 · Nianshun Yang1 · Xueying Huang1 · Yuyang Sun1 · Xiaojuan Cai1 · Yu Cao1 Received: 20 August 2020 / Accepted: 25 September 2020 © King Abdulaziz City for Science and Technology 2020
Abstract The nanodiamond (ND) particles have several potential applications including tribology, drug delivery, bioimaging, etc. However, the severe colloidal aggregation tendency of ND particles strictly limits its exploitation. Moreover, due to NDs rich surface chemistry and relatively small size, it is still difficult to separate these large ND particles using conventional separation methods. Herein, we develop an efficient and straightforward strategy to separate the colloidal aminated nanodiamonds (ND-NH2) into small size nanoparticles by viscosity gradient centrifugation method in a polyvinylpyrrolidone (PVP) aqueous solution. Prior to and after separation, the pristine ND and ND-NH2 particles size and morphology were characterized by DLS (dynamic light scattering analyzer) and TEM (transmission electron microscopic), which show that ND particles with narrow size distribution and uniform morphology can be easily separated by the viscosity gradient of PVP aqueous solution. This simple, rapid and effective separation method could be extended to separate other functionalized NDs with different sizes. Keywords Nanodiamond · Polyvinylpyrrolidone · Polyethylene glycol · Gradient medium · Rapid separation
Introduction A novel approach using a single nanoscale diamond tip is developed to perform grinding/nanoscratching, which is performed at a nanoscale depth of cut and m/s (Wang et al. 2018). The speeds employed in this approach are three to six orders magnitude higher than mm/s and μm/s used in nanoscratching (Zhang et al. 2015a). This method opens a new pathway to investigate the fundamental mechanisms for abrasive machining (Zhang et al. 2015b). Moreover, nanodiamonds are applied to develop novel diamond wheels, and high-performance surfaces are fabricated using the developed diamond wheels (Zhang et al. 2017a, b, c). Nanoparticles are also used to develop novel environment-friendly slurries, which is used for semiconductor, microelectronics and optoelectronics industries (Zhang et al. 2016a, b). Jiaying Qu, Jean Felix Mukerabigwi and Nianshun Yang are contributed equally to this work. * Yu Cao [email protected] 1
Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People’s Republic of China
These studies are a breakthrough and milestone contribution to conventional industrial manufacturing by greatly reducing pollutions. The detonation nanodiamond (ND) particles are novel carbon nanomaterials with the high and tunable surface area which were accidentally discovered in the 1960s (Schrand et al. 2007 2009; Yakovlev et al.). Their interesting key characteristics such as good chemical stability, low t
Data Loading...
