Photocatalytic disinfection of phytopathogenic bacteria by dye-sensitized TiO2 thin film activated by visible light

Yao, K. S.; Wang, D.Y.; Chang, Chih-Yuan; Weng, Ko-Wei; Yang, Lijun; Lee, S.J.; Cheng, Ta-Chih; Hwang, Ching-Chiang

doi:10.1016/j.surfcoat.2007.07.102

Cited by 60 publications

(28 citation statements)

References 26 publications

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“…However, un- der UV light, the bactericidal effects of TiO 2 -DLC films were increasing with the increase of TiO 2 content. This result was compared to the bactericidal activity of the pure TiO 2 thin film [43][44][45]. As expected, the TiO 2 -DLC films killed fewer bacteria than the pure TiO 2 films.…”

Section: Resultsmentioning

confidence: 73%

“…According to Wang and co-workers [44], bacterial colonization on a surface is a complex process and the initial phase is bacterial adhesion to the biomaterial substrate. From a physicochemical point of view, the adhesion of bacteria cells to a surface is determined by the interplay of electrostatic and hydrophobic/hydrophilic interactions [44].…”

Section: Resultsmentioning

confidence: 99%

“…From a physicochemical point of view, the adhesion of bacteria cells to a surface is determined by the interplay of electrostatic and hydrophobic/hydrophilic interactions [44]. The contact angles of the samples formed with distilled water and diiodomethane are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Antibacterial activity of DLC films containing TiO2 nanoparticles

Marciano

Lima-Oliveira

Silva

et al. 2009

Journal of Colloid and Interface Science

103

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Diamond-like carbon (DLC) films have been the focus of extensive research in recent years due to their potential applications as surface coatings on biomedical devices. Titanium dioxide (TiO2) in the anatase crystalline form is a strong bactericidal agent when exposed to near-UV light. In this work we investigate the bactericidal activity of DLC films containing TiO2 nanoparticles. The films were grown on 316L stainless-steel substrates from a dispersion of TiO2 in hexane using plasma-enhanced chemical vapor deposition. The composition, bonding structure, surface energy, stress, and surface roughness of these films were also evaluated. The antibacterial tests were performed against Escherichia coli (E. coli) and the results were compared to the bacterial adhesion force to the studied surfaces. The presence of TiO2 in DLC bulk was confirmed by Raman spectroscopy. As TiO2 content increased, I(D)/I(G) ratio, hydrogen content, and roughness also increased; the films became more hydrophilic, with higher surface free energy and the interfacial energy of bacteria adhesion decreased. Experimental results show that TiO2 increased DLC bactericidal activity. Pure DLC films were thermodynamically unfavorable to bacterial adhesion. However, the chemical interaction between the E. coli and the studied films increased for the films with higher TiO2 concentration. As TiO2 bactericidal activity starts its action by oxidative damage to the bacteria wall, a decrease in the interfacial energy of bacteria adhesion causes an increase in the chemical interaction between E. coli and the films, which is an additional factor for the increasing bactericidal activity. From these results, DLC with TiO2 nanoparticles can be useful for producing coatings with antibacterial properties.

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Section: Resultsmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 99%

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Antibacterial activity of DLC films containing TiO2 nanoparticles

Marciano

Lima-Oliveira

Silva

et al. 2009

Journal of Colloid and Interface Science

103

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“…TiO 2 is chemically inert, corrosion resistant, relatively non-toxic, inexpensive, and does not contribute any chemical or hazardous waste to the environment [3][4][5]. Consequently, it has been widely used in academic research and a variety of commercial applications, ranging from anti-fogging paints [6], photovoltaics (such as solar cells) [7,8], sensing applications [9,10] and photocatalysis of organic pollutants [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale TiO2 films and their application in remediation of organic pollutants

Varshney

Kanel

Kempisty

et al. 2016

Coordination Chemistry Reviews

139

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“…The toxic effect of TiO 2 photocatalysis to phytophatogenic bacteria is not only a chance to alternatively control plant diseases rather than using pesticides, but it can also present a hazard which currently cannot yet be estimated [133], [134].…”

Section: Bactericidal Effect Of Tio 2 and Zno Nanoparticlesmentioning

confidence: 99%

Toxicological Issues of Nanoparticles Employed in Photocatalysis

Wagner

Bloh²,

Kasper³

et al. 2011

Green

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A huge amount of different nanomaterials is nowadays on the market used for various specific applications. Some nanomaterials such as TiOHence these materials are used for many applications, e.g., for self-cleaning and antibacterial coatings on different surfaces and for the purification of wastewater where the cleaning can be induced by simple exposure to sunlight. Because of the frequent use of these nanoparticles it is important to investigate the life cycles of these nanostructured materials as well as their environmental impact and their toxicity to animals and humans.This review first gives a short overview about nanotechnology and nanotechnological products as well as about photocatalysis and semiconductors used in this field. We then discuss the need for a new technology named nanotoxicology and the problems occurring when investigating the toxic potential of nanomaterials as well as the life cycle of nanomaterials. Furthermore, we focus on the environmental impact of TiO

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Photocatalytic disinfection of phytopathogenic bacteria by dye-sensitized TiO2 thin film activated by visible light

Cited by 60 publications

References 26 publications

Antibacterial activity of DLC films containing TiO2 nanoparticles

Antibacterial activity of DLC films containing TiO2 nanoparticles

Nanoscale TiO2 films and their application in remediation of organic pollutants

Toxicological Issues of Nanoparticles Employed in Photocatalysis

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