Synthesis and Photoluminescence of Silica Nanowires Grown on Si Substrate

Cao, Lian Zhen; Song, Hang; Jiang, Hong; Lu, Huai Xin; Li, Ying De; Zhao, Jia Qiang

doi:10.1007/s10904-011-9557-8

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…Silica NWs, by the way, have been the object of intense efforts these past two decades, due to their wide range of potential applications, from intensive blue-light emitters [15][16][17] to separator for Li-ion batteries [18] or biosensors. [19] Regarding Si-silica heterostructures, the coupling of silica nanostructures with SiNWs has been demonstrated to strongly enhance or modify the NW luminescence.…”

Section: Introductionmentioning

confidence: 99%

Room Temperature Growth of Silica Nanowires on Top of Ultrathin Si Nanowires Synthesized with Sn‐Cu Bimetallic Seeds

Wang

Ngo

Florea

et al. 2021

Physica Status Solidi (a)

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Si nanowires (NWs) are grown by the vapor-liquid-solid method using Cu-Sn bimetallic catalysts in a plasma-enhanced chemical vapor deposition (PECVD) reactor. The microstructure of the NWs is analyzed by transmission electron microscopy and energydispersive X-ray spectroscopy. An amorphous SiO 2 region, much larger than the native oxide, is present on top of each Si crystalline NW: in SiNWs with diameter below 10 nm, it takes the form of a silica NW of up to 50 nm in length. The new NW separates the initial catalyst particle into one that stays in contact with the SiNW and one or more that lies at the top of the new NW. The former is made of Cu and Cu 3 Si and contains no Sn, while the latter keeps amounts of both elements. The observed microstructure appears to be the result of a mechanism of Si oxidation catalyzed by Cu 3 Si. The deposit after SiNW growth, in the 2 PECVD reactor, of a protecting 1-nm thick layer of amorphous hydrogenated Si, completely suppresses this mechanism. This work provides reference for future applications based on Cu-Sn-catalyzed quantum-sized SiNWs.

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