One-pot synthesis of Au/TiO2 heteronanostructure composites with SPR effect and its antibacterial activity

Zhang, Jingtao; Suo, Xinying; Zhang, Jie; Han, Bing; Li, Pengju; Xue, Yonggang; Shi, Hengzhen

doi:10.1016/j.matlet.2015.09.136

Cited by 29 publications

(10 citation statements)

References 19 publications

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“…In addition, the fast recombination of photogenerated electronhole pairs is another limitation for the application of TiO 2. In order to solve the two problems, incorporating plasmonic metal nanoparticles have been attempted to harvest visible light and reduce recombination 27) . Ag is a favorable metal for incorporation into TiO2 because that Ag acts as an electron traps can inhibit the recombination of photo-generated electron and hole pairs and thus enhance the overall photocatalytic activities of the composite 28) .…”

Section: Discussionmentioning

confidence: 99%

Antibacterial activity, cytotoxicity and mechanical behavior of nano-enhanced denture base resin with different kinds of inorganic antibacterial agents

Chen

Han

Huang

et al. 2017

Dental Materials Journal

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Silanized aluminum borate whiskers (ABWs) of 4 wt%, silanized zirconium dioxide nanoparticles (nano-ZrO2) of 2 wt% were mixed with polymethyl methacrylate (PMMA) powder to get ZrO2-ABWs/PMMA composites. Titanium dioxide (TiO2), silver-supported titanium dioxide (Ag/TiO2), silver-supported zirconium phosphate (Novaron) and tetrapod-like zinc oxide whiskers (T-ZnOw) antibacterial agents of 3 wt% were mixed with ZrO2-ABWs/PMMA composites respectively to fabricate standard specimens. Plaque biofilms on the specimens surface were investigated for colony-forming units (CFUs). In addition, cytotoxicity and mechanical behavior were evaluated. Results showed that the CFUs values of S. mutans and C. albican biofilms on the four antibacterial composites surface were all reduced (p<0.05) compared to the blank and control groups. The antibacterial composites did not have an adverse effect on fibroblast growth in this study (p>0.05) except TiO2 and Ag/TiO2 groups of undiluted extracts. The flexural strength and surface hardness of Novaron and T-ZnOw groups were increased (p<0.05) compared to the control group.

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Section: Discussionmentioning

confidence: 99%

Antibacterial activity, cytotoxicity and mechanical behavior of nano-enhanced denture base resin with different kinds of inorganic antibacterial agents

Chen

Han

Huang

et al. 2017

Dental Materials Journal

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“…LSPR values are 615–662 nm for Au NP and 589–682 for Ag NP. It gives the opportunity to use these composite thin films in the biomedical application as antibacterial coatings [ 82 , 83 ].…”

Section: Discussionmentioning

confidence: 99%

Antibacterial Activity of Silver and Gold Particles Formed on Titania Thin Films

et al. 2022

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Metal-based nanoparticles with antimicrobial activity are gaining a lot of attention in recent years due to the increased antibiotics resistance. The development and the pathogenesis of oral diseases are usually associated with the formation of bacteria biofilms on the surfaces; therefore, it is crucial to investigate the materials and their properties that would reduce bacterial attachment and biofilm formation. This work provides a systematic investigation of the physical-chemical properties and the antibacterial activity of TiO2 thin films decorated by Ag and Au nanoparticles (NP) against Veillonella parvula and Neisseria sicca species associated with oral diseases. TiO2 thin films were formed using reactive magnetron sputtering by obtaining as-deposited amorphous and crystalline TiO2 thin films after annealing. Au and Ag NP were formed using a two-step process: magnetron sputtering of thin metal films and solid-state dewetting. The surface properties and crystallographic nature of TiO2/NP structures were investigated by SEM, XPS, XRD, and optical microscopy. It was found that the higher thickness of Au and Ag thin films results in the formation of the enlarged NPs and increased distance between them, influencing the antibacterial activity of the formed structures. TiO2 surface with AgNP exhibited higher antibacterial efficiency than Au nanostructured titania surfaces and effectively reduced the concentration of the bacteria. The process of the observation and identification of the presence of bacteria using the deep learning technique was realized.

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“…For example, Zhang et al prepared a Au/TiO 2 hybrid material by solvothermal method. 141 Because of the SPR effect of Au, the prepared hybrid exhibited a stronger absorption in the visible light range. Their result showed that under visible light, this hybrid material produced large amount of • OH, which can effectively kill bacteria.…”

Section: Monophotocatalysts-based Antibacterialmentioning

confidence: 99%

“…Their result showed that under visible light, this hybrid material produced large amount of • OH, which can effectively kill bacteria. 141 In another work, Xue et al prepared a plasma photocatalyst Au/platinum(Pt)/g-C 3 N 4 . 142 As shown in Figure 13a−c, the Au/Pt comodified g-C 3 N 4 heterostructure showed an improved photocatalytic efficiency, originating from the SPR effect of Au, which enhanced the absorption intensity of the hybrid and the electron absorption of Pt NPs.…”

Section: Monophotocatalysts-based Antibacterialmentioning

confidence: 99%

Recent Progress in Photocatalytic Antibacterial

Zhou

Liu

et al. 2021

ACS Appl. Bio Mater.

129

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Pathogens on wounds and infected tissues or pathogens in drinking water or public facilities have been doing great harm in human life. Because of booming drug resistance and superbacteria, the abuse or excessive use of antibiotics during systemic treatment has caused a global antibiotic crisis. However, it usually takes a long time to develop antibiotics. In recent years, photocatalytic antibacterial agents have no drug resistance and side-effects due to their rapid and efficient bactericidal efficacy. They are becoming one of the most hopeful substitutions to antibiotics for dealing with the bacterial diseases and water pollution caused by certain pathogens. Photocatalysis has unique advantages in the field of antibacterials, and its controllability plays an irreplaceable role. This review focuses on the mechanism of photocatalysis, which involves representative photocatalytic semiconductors (metal oxides, metal sulfides, carbon nitride, heterojunction composite materials) and organics (organic polymers and organic small molecules-aggregation induced emission) as well as their photocatalytic antibacterial mechanism. In this paper, we summarize the photocatalytic antibacterial mechanisms by the numbers and current developing of photocatalytic antimicrobial materials applications. Current difficulties and expectations for the future in these fields are presented to stimulate the developing of material manufacturing technologies and their industrialization to combat bacterial infections. In addition, potential application limitations and future research potential are highlighted.

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One-pot synthesis of Au/TiO2 heteronanostructure composites with SPR effect and its antibacterial activity

Cited by 29 publications

References 19 publications

Antibacterial activity, cytotoxicity and mechanical behavior of nano-enhanced denture base resin with different kinds of inorganic antibacterial agents

Antibacterial activity, cytotoxicity and mechanical behavior of nano-enhanced denture base resin with different kinds of inorganic antibacterial agents

Antibacterial Activity of Silver and Gold Particles Formed on Titania Thin Films

Recent Progress in Photocatalytic Antibacterial

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