The effect of differently sized Ag catalysts on the fabrication of a silicon nanowire array using Ag-assisted electroless etching

Chiou, Ai-Huei; Chien, Tse-Chang; Su, Chun-Wei; Lin, Jheng-Fong; Hsu, Chun-Yao

doi:10.1016/j.cap.2012.11.011

Cited by 25 publications

(17 citation statements)

References 32 publications

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“…The Ag film with a thickness of 5 nm formed the porous structures, while SiNWs with 20-nm Ag films were fabricated [10]. Recently, Chiou et al [16] have investigated the use of an optimum thickness layer of an Ag catalyst in the fabrication of a silicon nanowire array through the two-step Ag-assisted chemical etching method. To the best of our knowledge, few studies have considered the thickness, type, and morphology of the noble metal involved in the fabricating process of SiNWs.…”

Section: Introductionmentioning

confidence: 99%

Effects of silver and gold catalytic activities on the structural and optical properties of silicon nanowires

Lajvardi

Eshghi

Izadifard

et al. 2016

Physica E: Low-dimensional Systems and Nanostructures

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Section: Introductionmentioning

confidence: 99%

Effects of silver and gold catalytic activities on the structural and optical properties of silicon nanowires

Lajvardi

Eshghi

Izadifard

et al. 2016

Physica E: Low-dimensional Systems and Nanostructures

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“…3f and g, respectively. First, the bonding electrons of surface silicon atoms can be transferred to Ag + ions in aqueous HF solution; that is, in the Ag + / Ag redox system with energy levels strongly overlapping with the valence bond of silicon, hole injection becomes more likely. The anodic oxidation of silicon dissolution should occur in the close vicinity of Ag nuclei to realise direct electron transport [14][15][16][17][18]. The surrounding lattices are oxidised and subsequently etched by HF [16][17][18].…”

Section: Resultsmentioning

confidence: 99%

“…The growth mechanisms of silicon nanowires and nanosheets can be established by observation in the period of EE reaction [14, 15]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Monocrystalline silicon nanowires and nanosheets as anodes of lithium‐ion battery: synthesis in mass production and low cost

Wang

Chen

Xing

2013

Micro & Nano Letters

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Monocrystalline silicon nanowires and nanosheets are prepared in mass production by the novel electroless etching method. Low-cost silicon powders are used as precursors. The initial capacities of silicon nanowires and nanosheets as lithium-ion battery (LIB) anodes are up to 4311 and 4426 mAh/g, respectively. After ten cycles, the reversible capacity maintains 2318 and 2791 mAh/g for nanowires and nanosheets, respectively. The capacity and cyclability of nanosheets is slightly higher than that of nanowires. Such a behaviour is attributed to their finite lateral sizes and enhanced open-edges, which can facilitate Li ion diffusion and decrease overvoltage associated with Li-Si alloying reaction. The presented results open a way for synthesising silicon nanostructures as LIB anodes in mass production and low cost.

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“…Several series of experiments have been carried out based on HF solutions with Ag + , Cu 2+ , AuCl 4 − or PtCl 6 2− and multicrystalline silicon. The metal ions were chosen because they are commonly used in the metal-assisted etching of silicon [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 26 , 27 , 29 , 30 , 31 , 32 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 63 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , …”

Section: Introductionmentioning

confidence: 99%

The Role of the Molecular Hydrogen Formation in the Process of Metal-Ion Reduction on Multicrystalline Silicon in a Hydrofluoric Acid Matrix

Schönekerl

Acker

2021

Nanomaterials

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Metal deposition on silicon in hydrofluoric acid (HF) solutions is a well-established process for the surface patterning of silicon. The reactions behind this process, especially the formation or the absence of molecular hydrogen (H2), are controversially discussed in the literature. In this study, several batch experiments with Ag+, Cu2+, AuCl4– and PtCl62– in HF matrix and multicrystalline silicon were performed. The stoichiometric amounts of the metal depositions, the silicon dissolution and the molecular hydrogen formation were determined analytically. Based on these data and theoretical considerations of the valence transfer, four reasons for the formation of H2 could be identified. First, H2 is generated in a consecutive reaction after a monovalent hole transfer (h+) to a Si–Si bond. Second, H2 is produced due to a monovalent hole transfer to the Si–H bonds. Third, H2 occurs if Si–Si back bonds of the hydrogen-terminated silicon are attacked by Cu2+ reduction resulting in the intermediate species HSiF3, which is further degraded to H2 and SiF62–. The fourth H2-forming reaction reduces oxonium ions (H3O+) on the silver/, copper/ and gold/silicon contacts via monovalent hole transfer to silicon. In the case of (cumulative) even-numbered valence transfers to silicon, no H2 is produced. The formation of H2 also fails to appear if the equilibrium potential of the 2H3O+/H2 half-cell does not reach the energetic level of the valence bands of the bulk or hydrogen-terminated silicon. Non-hydrogen-forming reactions in silver, copper and gold deposition always occur with at least one H2-forming process. The PtCl62– reduction to Pt proceeds exclusively via even-numbered valence transfers to silicon. This also applies to the reaction of H3O+ at the platinum/silicon contact. Consequently, no H2 is formed during platinum deposition.

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The effect of differently sized Ag catalysts on the fabrication of a silicon nanowire array using Ag-assisted electroless etching

Cited by 25 publications

References 32 publications

Effects of silver and gold catalytic activities on the structural and optical properties of silicon nanowires

Effects of silver and gold catalytic activities on the structural and optical properties of silicon nanowires

Monocrystalline silicon nanowires and nanosheets as anodes of lithium‐ion battery: synthesis in mass production and low cost

The Role of the Molecular Hydrogen Formation in the Process of Metal-Ion Reduction on Multicrystalline Silicon in a Hydrofluoric Acid Matrix

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