Organic experiments are inseparable from columns, plates, and rotors. Rotors are the most commonly used tools for macroscopic liquid mixing, but ordinary rotors are helpless for liquid mixing on a microscopic scale. The magnetic nanostirr is composed of a magnetic core and an outer protective shell. Thanks to its tiny size, the magnetic nanostirr can enter small spaces such as micro droplets and microfluidic pipes that are difficult for ordinary magnetic stirrers to stir [1] . However, there are still many difficulties in the controllable preparation and use of magnetic nanostirrs [2,3].


Figure 1 Magnetic nanostirr under scanning electron microscope
Professor Chen Hongyu's scientific research team has focused on the synthesis of stirrers for more than ten years. They creatively used electrospinning technology to quickly prepare Fe3O4 magnetic nanostirrs, achieving controllable synthesis of stirrers of different sizes. The diameter size range of the prepared magnetic nanostirr is in the sub-micron and micron levels, and the length range can be from sub-micron to macro size, which can meet the stirring needs in small spaces in different scenarios [3].



The video below visually demonstrates the stirring effects of three different sizes of magnetic nanostirring bars in micro-droplets by adding 2 μL of methyl orange dye to the droplets.

Figure 1 Magnetic nanostirr under scanning electron microscope Professor

J&K Scientific exclusively sells the Fe3O4 magnetic nanostirr developed by Professor Chen Hongyu. This product has the following advantages:

Uniform appearance and stable quality;

The size span range is large, which can meet the mixing requirements in small spaces in different scenarios;

Easy to recycle, reuse, green and environmentally friendly, not only avoids contamination of the main solution, but also saves costs;

Simple and safe operation.

Chen Hongyu is a full professor in the School of Science of Westlake University. He was a professor, doctoral supervisor and executive dean of the Advanced Chemical Manufacturing Research Institute of Nanjing University of Technology, an associate professor of the Department of Chemistry and Biochemistry of Nanyang Technological University in Singapore, deputy director of the Department of Science, and deputy dean of the School of Mathematics and Physics. He has been engaged in scientific research in the field of nanoscience for a long time, focusing on composite nanosynthesis and mechanism research, as well as various extended applications: committed to developing new methods, synthesizing new nanostructures, studying their formation mechanisms, and developing new synthesis methods controlled by amorphous planes.

Nanosynthesis has shifted from the traditional field to new directions such as multi-component, composite structure, assembly structure, new lattice, low symmetry and chiral structure.

product information

Product name:

Magnetic nano-stir bars, silica coated iron oxide (II,III), 0.1 mg/ml in ethanol

Item number：984557

References

1. Chen Wen Han Chong, Lip Ket Chin, Rachel Lee Siew Tan, Hong Wang, Ai Qun Liu, and Hongyu Chen*, Angew. Chem. Int. Ed. 2013, 52, 8570 –8573.
2. Ting Hu, Qiaozhen Ji, Wen Han Chong, Wenwen Xin, Xueyang Liu*, and Hongyu Chen*, Nanoscale, 2020, 12, 18640-18645.
3. Qiaozhen Ji, Ting Hu, Qiuxian Chen, Wenwen Xin, Xueyang Liu*, and Hongyu Chen*, Chem. Commun., 2020, 56, 11767-11770.