Nanomaterials | |
In Situ Formation of Nanoporous Silicon on a Silicon Wafer via the Magnesiothermic Reduction Reaction (MRR) of Diatomaceous Earth | |
Denis M. Zhigunov1  Igor A. Salimon1  Alexey I. Salimon2  Yuliya Kan2  Sergey Luchkin2  Bakhodur Abdusatorov2  Svetlana A. Lipovskikh2  Alexander M. Korsunsky2  Patrick Aggrey2  | |
[1] Center Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia;Hierarchically Structured Materials lab, Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia; | |
关键词: magnesiothermic reduction reaction; diatomaceous earth; in situ processing; nanoflakes; black silicon; fractal structure; surface reflection; light absorption; | |
DOI : 10.3390/nano10040601 | |
来源: DOAJ |
【 摘 要 】
Successful direct route production of silicon nanostructures from diatomaceous earth (DE) on a single crystalline silicon wafer via the magnesiothermic reduction reaction is reported. The formed porous coating of 6 µm overall thickness contains silicon as the majority phase along with minor traces of Mg, as evident from SEM-EDS and the Focused Ion Beam (FIB) analysis. Raman peaks of silicon at 519 cm−1 and 925 cm−1 were found in both the film and wafer substrate, and significant intensity variation was observed, consistent with the SEM observation of the directly formed silicon nanoflake layer. Microstructural analysis of the flakes reveals the presence of pores and cavities partially retained from the precursor diatomite powder. A considerable reduction in surface reflectivity was observed for the silicon nanoflakes, from 45% for silicon wafer to below 15%. The results open possibilities for producing nanostructured silicon with a vast range of functionalities.
【 授权许可】
Unknown