A nano-structured TiO2/CuO/Cu2O coating on Ti-Cu alloy with dual function of antibacterial ability and osteogenic activity

Zhang, Yuan; Fu, Shuangcheng; Yang, Lei; Qin, Gaowu; Zhang, Erlin

doi:10.1016/j.jmst.2021.04.056

Cited by 43 publications

(13 citation statements)

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“…Cuprous (Cu 2 O) and cupric (CuO) oxide are among the candidates that meet many of these necessary requirements while offering potentially promising performance in terms of photocurrent and photovoltage output. , They are also gaining increased attention in the field of battery electrodes, photonic crystals, hydrogen production, water treatment, and even antibacterial activity . However, low absorption and poor chemical stability in aqueous conditions combined with fast electron–hole recombination hinder the onset of photocurrent and limit the practical utilization of Cu 2 O or CuO. , For example, in order to efficiently absorb sunlight, Cu 2 O films must typically be at least 1 μm thick.…”

Section: Introductionmentioning

confidence: 99%

“…10,11 They are also gaining increased attention in the field of battery electrodes, 12 photonic crystals, 13 hydrogen production, 11 water treatment, 14 and even antibacterial activity. 15 However, low absorption and poor chemical stability in aqueous conditions combined with fast electron−hole recombination hinder the onset of photocurrent and limit the practical utilization of Cu 2 O or CuO. 16,17 For example, in order to efficiently absorb sunlight, Cu 2 O films must typically be at least 1 μm thick.…”

Section: ■ Introductionmentioning

confidence: 99%

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Mind the Interface Gap: Exposing Hidden Interface Defects at the Epitaxial Heterostructure between CuO and Cu₂O

Živković

Mallia

et al. 2022

ACS Appl. Mater. Interfaces

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Well designed and optimized epitaxial heterostructures lie at the foundation of materials development for photovoltaic, photocatalytic, and photoelectrochemistry applications. Heterostructure materials offer tunable control over charge separation and transport at the same time preventing recombination of photogenerated excitations at the interface. Thus, it is of paramount importance that a detailed understanding is developed as the basis for further optimization strategies and design. Oxides of copper are nontoxic, low cost, abundant materials with a straightforward and stable manufacturing process. However, in individual applications, they suffer from inefficient charge transport of photogenerated carriers. Hence, in this work, we investigate the role of the interface between epitaxially aligned CuO and Cu 2 O to explore the potential benefits of such an architecture for more efficient electron and hole transfer. The CuO/Cu 2 O heterojunction nature, stability, bonding mechanism, interface dipole, electronic structure, and band bending were rationalized using hybrid density functional theory calculations. New electronic states are identified at the interface itself, which are originating neither from lattice mismatch nor strained Cu−O bonds. They form as a result of a change in coordination environment of CuO surface Cu 2+ cations and an electron transfer across the interface Cu 1+ −O bond. The first process creates occupied defect-like electronic states above the valence band, while the second leaves hole states below the conduction band. These are constitutional to the interface and are highly likely to contribute to recombination effects competing with the improved charged separation from the suitable band bending and alignment and thus would limit the expected output photocurrent and photovoltage. Finally, a favorable effect of interstitial oxygen defects has been shown to allow for band gap tunability at the interface but only to the point of the integral geometrical contact limit of the heterostructure itself.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Mind the Interface Gap: Exposing Hidden Interface Defects at the Epitaxial Heterostructure between CuO and Cu₂O

Živković

Mallia

et al. 2022

ACS Appl. Mater. Interfaces

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show abstract

“…According to previous reports, substances which can prduce Cu 2+ ions have been added to impart the antibacterial properties of the material, such as CuSO 4 [ 77 ], Cu monometallic [ 78 ], copper acetate [ 79 ], or CuO/Cu 2 O [ 80 ]. There are, nevertheless, scarce reports on the applications of porphyrin on biodegradable metals.…”

Section: Discussionmentioning

confidence: 99%

In vitro degradation, photo-dynamic and thermal antibacterial activities of Cu-bearing chlorophyllin-induced Ca–P coating on magnesium alloy AZ31

Zhang

Wang

et al. 2022

Bioactive Materials

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“…Several studies indicated that the surface topography and hydrophilicity of Ti–Cu are also effective in the antibacterial performance [ 199 , 222 , 223 , 256 , [264] , [265] , [266] , [267] , [268] ]. For example, Hu et al.…”

Section: Ti–cu Antibacterial Implantsmentioning

confidence: 99%

Antibacterial Ti–Cu implants: A critical review on mechanisms of action

Mahmoudi¹,

Akbarpour²,

Lakeh³

et al. 2022

Materials Today Bio

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A nano-structured TiO2/CuO/Cu2O coating on Ti-Cu alloy with dual function of antibacterial ability and osteogenic activity

Cited by 43 publications

References 65 publications

Mind the Interface Gap: Exposing Hidden Interface Defects at the Epitaxial Heterostructure between CuO and Cu₂O

Mind the Interface Gap: Exposing Hidden Interface Defects at the Epitaxial Heterostructure between CuO and Cu₂O

In vitro degradation, photo-dynamic and thermal antibacterial activities of Cu-bearing chlorophyllin-induced Ca–P coating on magnesium alloy AZ31

Antibacterial Ti–Cu implants: A critical review on mechanisms of action

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A nano-structured TiO2/CuO/Cu2O coating on Ti-Cu alloy with dual function of antibacterial ability and osteogenic activity

Cited by 43 publications

References 65 publications

Mind the Interface Gap: Exposing Hidden Interface Defects at the Epitaxial Heterostructure between CuO and Cu2O

Mind the Interface Gap: Exposing Hidden Interface Defects at the Epitaxial Heterostructure between CuO and Cu2O

In vitro degradation, photo-dynamic and thermal antibacterial activities of Cu-bearing chlorophyllin-induced Ca–P coating on magnesium alloy AZ31

Antibacterial Ti–Cu implants: A critical review on mechanisms of action

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Mind the Interface Gap: Exposing Hidden Interface Defects at the Epitaxial Heterostructure between CuO and Cu₂O

Mind the Interface Gap: Exposing Hidden Interface Defects at the Epitaxial Heterostructure between CuO and Cu₂O