Professor HAN Heyou shared his Latest Achievement in Applications of Nanomaterials

Professor HAN Heyou, who comes from the State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, presented a report about “Innovation strategy of nano-biological probes and its application” that introduced the development and latest applications of novel functional nanomaterials.

Nanomaterials is the materials that at least one dimension is in nanometer size between 1 to 1000 nanometers, or that are composed of nanomaterials as the basic units. This size equal with the length scale that about 10-100 atoms are tightly aligned. In recent years, nanomaterials have been widely applied in many areas, including medical, mechanical, environmental and industrial. Professor HAN Heyou specifically focuses on the application of nanomaterials in agriculture, and aims to solve the problem of the analysis and detection in agriculture, food, and biology with new functional nanomaterials. Professor Han also came up with some constructive theories, and pushed the development of the field greatly.

In his presentation, Professor Han systematically introduced the nano-biodevice synthesis and assembly, nano-bioanalysis applications, nanomaterial biological effects, nanomaterial bio-imaging, and so on. Among these researches, Professor Han’s group got a soft, flexible, and elastic SERS base by depositing Ag nanoparticles on the 3D PDMS nano-antenna array. The SERS base has countless “tentacles” in nanometer size (about 6.7×108 per cm2). It is also called nano-antenna SERS base. Rapid sampling and multi-component testing are critical for pesticide residue analysis, and the high-density tentacles could easily any reach tiny area of the real sample surface for the efficient collection of target molecules. Rapid and reliable detection of thiram, methyl parathion, malachite Green and their multi-component residues on the surface of cucumber, apple and grape was achieved by direct and high-efficiency sampling with G-SERS base. What’s more, Han’s group synthesized a nano-catalyst by using a green and environmentally friendly synthetic method. The catalyst showed good catalytic activity and stability, and the mass activity of electrocatalytic ethanol oxidation was 6.15 times higher than that of commercial palladium carbon. Finally, Professor Han introduced a photodynamic therapy that could enhance tumor phagocytosis by nanoparticle morphology transformation responding to chimeric peptides with the influence of tumor acid environment.

After the seminar, teachers and students had a heated discussion with Professor Han, and some of the students benefit greatly from the seminar.


Source from South China Advanced Institute for Soft Matter Science and Technology

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