Bias deposition of nanoporous Cu thin films

Su, Jiangbin; Wang, H.H.; Jiang, Meiping; Li, L.X.

doi:10.1016/j.matlet.2013.03.114

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…[25]. In this bias deposition, the tip charging effect [25,26] was demonstrated to dominate the formation process of the PNFs. To investigate the physical and chemical instabilities of the as-prepared Cu2O PNFs, several kinds of heating treatments such as rapid thermal processing (RTP), high vacuum annealing (HVA), dry-oxygen oxidation and wet-oxygen oxidation were respectively carried out at 200-500 ℃ for a duration of 30 min.…”

Section: Methodsmentioning

confidence: 80%

“…Cu 2 O thin films of a triangular pyramids-like PNF structure were fabricated on glass slide substrates by a radio-frequency balanced magnetron sputtering approach at a substrate bias voltage of +50 V. The film thickness was uniformly controlled to be ∼240 nm and other fabrication details can be found in [25]. In this bias deposition, the tip charging effect [25,26] was demonstrated to dominate the formation process of the PNFs. To investigate the physical and chemical instabilities of the as-prepared Cu 2 O PNFs, several kinds of common heating treatments such as rapid thermal processing (RTP), high vacuum annealing (HVA), dry oxygen oxidation and wet-oxygen oxidation (considering the work environment of Cu 2 O and related devices and further referencing to the oxidation approaches of silicon wafers) were respectively carried out at 200 °C-500 °C for a duration of 30 min.…”

Section: Methodsmentioning

confidence: 99%

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Nanoinstabilities of Cu₂O porous nanostructured films as driven by nanocurvature effect and thermal activation effect

Zhu

et al. 2019

Nanotechnology

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In this work, the instabilities at the nanoscale (i.e. nanoinstabilities) of triangular pyramids-like Cu2O porous nanostructured films (PNFs) are studied by heating treatments under different atmosphere and temperature. It is found that the nanoscale building triangular-pyramids turn round preferentially at the sharp angles and/or coalesce with their contacting ones by directional diffusion and plastic flow of atoms, which are driven by the nonuniformly-distributed surface nanocurvature. As a result, the triangular pyramids become quasi-sphere shape and the PNF evolves into a big, dense particles film. It is also observed that the heating or thermal activation effect efficiently promotes the reduction or oxidation of Cu2O pyramids and the crystallization or growth of the as-achieved Cu or CuO grains. The above physical and chemical instabilities or changes at the nanoscale of Cu2O PNFs can be well accounted for by the combined mechanism of nanocurvature effect and thermal activation effect. The nanocurvature effect can lower the energy barrier for the atom diffusion or plastic flow and lower the activation energy for the chemical reactions, while the thermal activation effect can supply the required kinetic energy or activation energy and make the atomic transportations and reactions kinetically possible. The findings reveal the evolution laws of morphology, crystal structure and composition of triangular pyramids-like Cu2O PNF during heating treatments, which can further be extended to other types of Cu2O PNFs. Also, the findings have important implications for the nanoinstabilities of Cu2O 2 PNFs-based devices, especially those working at a high temperature.

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Section: Methodsmentioning

confidence: 80%

Section: Methodsmentioning

confidence: 99%

Nanoinstabilities of Cu₂O porous nanostructured films as driven by nanocurvature effect and thermal activation effect

Zhu

et al. 2019

Nanotechnology

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“…Future studies might include the use of grazing-incidence small-angle X-ray scattering as already demonstrated for nanoprisms prepared using sputtering [ 22 ]. They should also include the solid-state studies and, when micro- and nano-focussed X-ray beam are available, the micrometer size details in patterned structures such as microwires of silver composites [ 23 ].…”

Section: Discussionmentioning

confidence: 99%

Structural Study of the Photo-Mediated Growth of Silver Nanoprisms

Knaapila

Vainio²,

Canton

et al. 2020

Molecules

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We present a small-angle X-ray scattering (SAXS) study of the anisotropic photoinduced growth of silver (Ag) nanoprisms in aqueous dispersions. The growth of nearly spherical (<10 nm) Ag particles into large (>40 nm) and thin (<10 nm) triangular nanoprisms induced by 550 nm laser is followed in terms of particle size using indirect and direct methods for irradiation times up to 150 min. During the process, the surface-to-volume ratio of the particles decreased. The SAXS data of the initial solution fit well to the model of polydisperse spheres with pronounced average diameters around 7.4 nm and 10 nm. The data after 45 min irradiation fit well to the model containing approximately the same amount of the initial particles and the end product, the nanoprisms.

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Fabrication of porous CuO nanoplate-films by oxidation-assisted dealloying method

Wang¹,

Jiang²,

Su³

et al. 2014

Surface and Coatings Technology

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Bias deposition of nanoporous Cu thin films

Cited by 6 publications

References 11 publications

Nanoinstabilities of Cu₂O porous nanostructured films as driven by nanocurvature effect and thermal activation effect

Nanoinstabilities of Cu₂O porous nanostructured films as driven by nanocurvature effect and thermal activation effect

Structural Study of the Photo-Mediated Growth of Silver Nanoprisms

Fabrication of porous CuO nanoplate-films by oxidation-assisted dealloying method

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Bias deposition of nanoporous Cu thin films

Cited by 6 publications

References 11 publications

Nanoinstabilities of Cu2O porous nanostructured films as driven by nanocurvature effect and thermal activation effect

Nanoinstabilities of Cu2O porous nanostructured films as driven by nanocurvature effect and thermal activation effect

Structural Study of the Photo-Mediated Growth of Silver Nanoprisms

Fabrication of porous CuO nanoplate-films by oxidation-assisted dealloying method

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Nanoinstabilities of Cu₂O porous nanostructured films as driven by nanocurvature effect and thermal activation effect

Nanoinstabilities of Cu₂O porous nanostructured films as driven by nanocurvature effect and thermal activation effect