Limits...
The dual role of silver during silicon etching in HF solution.

Abouda-Lachiheb M, Nafie N, Bouaicha M - Nanoscale Res Lett (2012)

Bottom Line: In this paper, we give experimental results arguing the dual role that silver has during the formation of silicon nanostructures.Through our investigations, we tracked the silver particles that indicated which mechanism is involved.Characterizations of the prepared samples were made using a scanning electron microscope.

View Article: PubMed Central - HTML - PubMed

Affiliation: Laboratoire de Photovoltaique, Centre de Recherches et des Technologies de l'Energie, Technopole de Borj-Cedria, BP 95, Hammam-Lif, Tunis, 2050, Tunisia. Mongi.Bouaicha@crten.rnrt.tn.

ABSTRACT
It was reported that during silicon etching, silver was subjected to have a controversial role. Some researchers debate that silver protects silicon, and, at the same time, other ones confirm that silver catalyzes silicon underneath. In this paper, we give experimental results arguing the dual role that silver has during the formation of silicon nanostructures. We give a proof that the role of silver depends on the experimental details and the intrinsic properties of silver during its deposition on the silicon wafer. Through our investigations, we tracked the silver particles that indicated which mechanism is involved. Characterizations of the prepared samples were made using a scanning electron microscope.

No MeSH data available.


Top SEM image of sample C after etching in HF solution.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3472321&req=5

Figure 6: Top SEM image of sample C after etching in HF solution.

Mentions: To confirm the above mechanisms, we use twin samples (sample C). After cleaning, samples were immersed for a short duration (3 min) in a HF/AgNO3 solution with the same concentrations used for sample A. In Figure 5, we show a top SEM image of one sample where we observe silver nanoparticles deposited in the HF/AgNO3 (image a). However, image b is a cross-section SEM view of the second sample after removing the silver film, where we observe the beginning of silicon etching. Then, the sample C with silver nanoparticles was immersed in a 40% HF aqueous solution, as done for sample B, for 2 min. Figure 6 is a SEM image of this sample after etching, where we observe silver nanoparticles in the bottom of etched silicon.


The dual role of silver during silicon etching in HF solution.

Abouda-Lachiheb M, Nafie N, Bouaicha M - Nanoscale Res Lett (2012)

Top SEM image of sample C after etching in HF solution.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472321&req=5

Figure 6: Top SEM image of sample C after etching in HF solution.
Mentions: To confirm the above mechanisms, we use twin samples (sample C). After cleaning, samples were immersed for a short duration (3 min) in a HF/AgNO3 solution with the same concentrations used for sample A. In Figure 5, we show a top SEM image of one sample where we observe silver nanoparticles deposited in the HF/AgNO3 (image a). However, image b is a cross-section SEM view of the second sample after removing the silver film, where we observe the beginning of silicon etching. Then, the sample C with silver nanoparticles was immersed in a 40% HF aqueous solution, as done for sample B, for 2 min. Figure 6 is a SEM image of this sample after etching, where we observe silver nanoparticles in the bottom of etched silicon.

Bottom Line: In this paper, we give experimental results arguing the dual role that silver has during the formation of silicon nanostructures.Through our investigations, we tracked the silver particles that indicated which mechanism is involved.Characterizations of the prepared samples were made using a scanning electron microscope.

View Article: PubMed Central - HTML - PubMed

Affiliation: Laboratoire de Photovoltaique, Centre de Recherches et des Technologies de l'Energie, Technopole de Borj-Cedria, BP 95, Hammam-Lif, Tunis, 2050, Tunisia. Mongi.Bouaicha@crten.rnrt.tn.

ABSTRACT
It was reported that during silicon etching, silver was subjected to have a controversial role. Some researchers debate that silver protects silicon, and, at the same time, other ones confirm that silver catalyzes silicon underneath. In this paper, we give experimental results arguing the dual role that silver has during the formation of silicon nanostructures. We give a proof that the role of silver depends on the experimental details and the intrinsic properties of silver during its deposition on the silicon wafer. Through our investigations, we tracked the silver particles that indicated which mechanism is involved. Characterizations of the prepared samples were made using a scanning electron microscope.

No MeSH data available.