Discovery of nano-sized gold particles in natural plant tissues

Springer Science and Business Media LLC - Tập 16 - Trang 1441-1448 - 2018
Xiaoen Luo1,2, Jianjin Cao1,2
1School of Earth Sciences and Engineering, Sun Yat-Sen University, Guangzhou, China
2Guangdong Provincial Key Laboratory of Geological Processes and Mineral Resource Exploration, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou, China

Tóm tắt

Biological effects of nanoparticles have attracted widespread attention. However, the interaction between plants and nanoparticles remains unclear. The purpose of this study was to investigate characteristics of nano-sized metal particles in two representative plant species, Erigeron canadensis and Boehmeria nivea, in the Guangdong Province, China. The stems of the plants were sliced and placed on Ni–C grids for field-emission transmission electron microscopy (TEM). The metal-bearing nanoparticles were further analysed for their size, shape, composition, content and other characteristics using X-ray energy spectrum analysis, scanning TEM and selected-area electron diffraction pattern. The results revealed that the plants contain nano-sized Au-bearing particles with a diameter of 5–50 nm, ellipsoid, spherical and bone-rod shapes or irregular morphology with smooth edges. These nanoparticles primarily consisted of Au, Cu, O and Cl. The discovery of Au-bearing nanoparticles in natural plant tissues is of great significance for biological nanoscience. Here, we discuss the function and absorption mechanism of Au-bearing nanoparticles in plants and present the influence of the discovery of Au-bearing nanoparticles in natural plants.

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