TiO2 nanotubes modified with Au nanoparticles for visible-light enhanced antibacterial and anti-inflammatory capabilities

Xu, Wenhan; Qi, Manlin; Li, Xue; Liu, Xuxu; Wang, Lin; Yu, Wanqi; Liu, Min; A, Lan; Zhou, Yanmin; Song, Yanyan

doi:10.1016/j.jelechem.2019.04.062

Cited by 40 publications

(28 citation statements)

References 41 publications

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“…Presently, the antibacterial mechanism of 316L SS is mainly based on the dissolution of Ag, Cu, or Zn ions [9][10][11][12], which is limited by several factors such as the safe range of ion concentration, competition between rates of ion dissolution and bacterial proliferation and the antibacterial period [13][14][15][16]. Photocatalysis is a highly efficient and inexpensive technique to inhibit and kill the bacteria [17][18][19][20]. It is based on the photochemical properties of semiconductor photocatalyst to generate reactive oxygen species (ROS), superoxide anion (O À 2 ) radicals under external energy such as the natural energy of sunlight [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Liu

et al. 2020

J Mater Sci

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The demand of medical materials for rapid and efficient elimination of bacteria has seen a dramatic surge over the past few years. In this study, antibacterial nanofilms with reactive oxygen species were generated by photocatalysis. To prepare these nanofilms, Ag and amorphous TiO 2 nanoparticles decorated on polydopamine (PDA) were coated on three-dimensional (3D) nanopore arrays, which was fabricated on a substrate of anodized stainless steel. All the antibacterial tests were conducted with a household flashlight, which may be considered as a practical approach for antibacterial materials. The photoelectrochemical property of the 3D Ag/TiO 2 /PDA nanofilm on 316L stainless steel (Ag/TiO 2 /PDA SS) was about 15 times higher than that of the annealed Ag/ TiO 2 /PDA SS, and consequently, it exhibited higher antibacterial activity. The enhanced photoelectrochemical property is attributed to the successful separation of electrons (amorphous TiO 2 ) and holes (Ag nanoparticles). Further, when a plate containing 3D Ag/TiO 2 /PDA SS was irradiated with visible light just for 10 min, it immediately destroyed the bacteria in 10 6 CFU/mL without any bacterial colony. After five weeks, there were still no bacterial colonies in the plate corresponding to Ag/TiO 2 /PDA SS under visible light, while Ag/TiO 2 / PDA SS in dark had a negligible effect on the bacteria, i.e., the antibacterial mechanism through direct contact and ion dissolution was not efficient. The excellent antibacterial properties of 3D Ag/TiO 2 /PDA SS illuminated by flashlight provides an efficient, facile, and cost-effective technique for the development of antibacterial medical materials to meet the increasing demand of eliminating bacterial infections.

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Section: Introductionmentioning

confidence: 99%

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Liu

et al. 2020

J Mater Sci

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“…However, recent studies have solved this problem by using visible light-activated photocatalysts, like Ag/AgBr/TiO 2 , and doped-TiO 2 nanostructures. [51][52][53] The first use of TiO 2 as a photocatalytic micro biocide was reported by Matsunaga et al (1985), when they investigated TiO 2 antibacterial activity towards Lactobacillus acidophilus, Saccharomyces cerevisiae and E. coli. 54 Various studies have explained that the photocatalytic activity of TiO 2 in water is efficient against broad range of organisms, such as bacteria (Gram-negative and Gram-positive), fungi, viruses, algae, protozoa and bacterial toxins.…”

Section: Tio 2 -Based Antibacterial Devices For Prevention and Treatmmentioning

confidence: 99%

<p>Biomedical Applications of TiO<sub>2</sub> Nanostructures: Recent Advances</p>

Jafari¹,

Mahyad²,

Hashemzadeh³

et al. 2020

IJN

251

116

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Titanium dioxide (TiO 2) nanostructures are one of the most plentiful compounds that have emerged in various fields of technology such as medicine, energy and biosensing. Various TiO 2 nanostructures (nanotubes [NTs] and nanowires) have been employed in photoelectrochemical (PEC) biosensing applications, greatly enhancing the detection of targets. TiO 2 nanostructures, used as reinforced material or coatings for the bare surface of titanium implants, are excellent additive materials to compensate titanium implants deficiencies-like poor surface interaction with surrounding tissues-by providing nanoporous surfaces and hierarchical structures. These nanostructures can also be loaded by diversified drugs-like osteoporosis drugs, anticancer and antibiotics-and used as local drug delivery systems. Furthermore, TiO 2 nanostructures and their derivatives are new emerging antimicrobial agents to overcome human pathogenic microorganisms. However, like all other nanomaterials, toxicity and biocompatibility of TiO 2 nanostructures must be considered. This review highlights recent advances, along with the properties and numerous applications of TiO 2-based nanostructure compounds in nano biosensing, medical implants, drug delivery and antibacterial fields. Moreover, in the present study, some recent advances accomplished on the pharmaceutical applications of TiO 2 nanostructures, as well as its toxicity and biocompatibility, are presented.

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“…At the same time, the cell culture results showed that the Ti-GNR and Ti-GNR-NIR surfaces had lower cytotoxicity to MC3T3-E1 cells. Xu W. et al (2019) prepared TiO 2 nanotube arrays (TNT) on Ti plates by anodizing, and then loaded gold NPs (Au NPs) into TNT. Under visible light, the antibacterial ability of nanotubes loaded with gold NPs against anaerobic bacteria was evaluated.…”

Section: Nanomaterials Loadingmentioning

confidence: 99%

Nano-Modified Titanium Implant Materials: A Way Toward Improved Antibacterial Properties

Liu

Attarilar

et al. 2020

Front. Bioeng. Biotechnol.

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TiO2 nanotubes modified with Au nanoparticles for visible-light enhanced antibacterial and anti-inflammatory capabilities

Cited by 40 publications

References 41 publications

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

<p>Biomedical Applications of TiO<sub>2</sub> Nanostructures: Recent Advances</p>

Nano-Modified Titanium Implant Materials: A Way Toward Improved Antibacterial Properties

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