Chemisorption of water vapor on zinc oxide

Sengupta, G.; Ahluwalia, Hira S.; Banerjee, Subhabrata; Sen, Sujit

doi:10.1016/0021-9797(79)90150-4

Cited by 31 publications

(15 citation statements)

References 6 publications

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“…Similarly, when bactericidal activity was determined after GSH (i.e., without ROS production) treatment with ZnO samples, MIC values (Table 1; Figure 3(c)) for ZnO-300 to ZnO-500 were almost the same indicating oxidative stress due to the fact that ROS is the governing factor as other [39].…”

Section: Journal Of Nanosciencementioning

confidence: 81%

Curious Case of Bactericidal Action of ZnO

Ghosh

Sankar

Vandana

2014

Journal of Nanoscience

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ZnO nanoparticles (NPs) are well known for their bactericidal properties. Various mechanisms are proposed for their bactericidal activity. An ambiguity still prevails to know which mechanism or property is mainly influencing the bactericidal activity of ZnO NPs. The antibacterial properties of ZnO NPs were investigated against both Gram-positive and Gram-negative bacteria. Different ZnO samples with different degrees of surface oxygen vacancies were prepared from ZnO2. The surface oxygen vacancy and thereby reactive oxygen species (ROS) production in aqueous ZnO solution are quantified by photoluminescence (PL) and electron paramagnetic resonance (EPR) spin trapping experiments, respectively. Systematic experiments have been performed to validate a precise antibacterial mechanism of ZnO particle.

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Section: Journal Of Nanosciencementioning

confidence: 81%

Curious Case of Bactericidal Action of ZnO

Ghosh

Sankar

Vandana

2014

Journal of Nanoscience

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“…The OH-radicals of water can cause a slight decrease of the electrical conductivity of an oxide transistor. [ 34 ] In addition, the mechanical stress generated in the active layers of a device during attachment to the curved surface of the roller may also affect the device performance. However, the changes in IGZO TFT parameters may again be improved by more careful process optimization.…”

Section: Transfer and Output Characteristicsmentioning

confidence: 99%

Load‐Controlled Roll Transfer of Oxide Transistors for Stretchable Electronics

Sharma

Jang

Lee

et al. 2012

Adv Funct Materials

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A stretchable and transparent In-Ga-Zn-O (IGZO) thin fi lm transistors with high electrical performance and scalability is demonstrated. A load-controlled roll transfer method is realized for fully automated and scalable transfer of the IGZO TFTs from a rigid substrate to a nonconventional elastomeric substrate. The IGZO TFTs exhibit high electrical performance under stretching and cyclic tests, demonstrating the potentiality of the load-controlled roll transfer in stretchable electronics. The mechanics of the load-controlled roll transfer is investigated and simulated, and it is shown that the strain level experienced by the active layers of the device can be controlled to well below their maximum fracture level during transfer.

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“…[68,69] In addition, little is known about the nature of defect sites on a wet metal oxide surface. We propose, although this awaits further support, that the formation of hydroxyl radicals can be explained if one assumes the following mechanism adopted from the formation of hydroxyl radicals in the reaction of water and (dissolved) oxygen over basic metal oxides and lanthanide oxides: [70] …”

Section: The Reaction Of Zno With Watermentioning

confidence: 99%

Enhanced Antibacterial Activity of Nanocrystalline ZnO Due to Increased ROS‐Mediated Cell Injury

Applerot

Lipovsky

Dror

et al. 2009

Adv Funct Materials

887

522

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An innovative study aimed at understanding the influence of the particle size of ZnO (from the microscale down to the nanoscale) on its antibacterial effect is reported herein. The antibacterial activity of ZnO has been found to be due to a reaction of the ZnO surface with water. Electron‐spin resonance measurements reveal that aqueous suspensions of small nanoparticles of ZnO produce increased levels of reactive oxygen species, namely hydroxyl radicals. Interestingly, a remarkable enhancement of the oxidative stress, beyond the level yielded by the ZnO itself, is detected following the antibacterial treatment. Likewise, an exposure of bacteria to the small ZnO nanoparticles results in an increased cellular internalization of the nanoparticles and bacterial cell damage. An examination of the antibacterial effect is performed on two bacterial species: Escherichia coli (Gram negative) and Staphylococcus aureus (Gram positive). The nanocrystalline particles of ZnO are synthesized using ultrasonic irradiation, and the particle sizes are controlled using different solvents during the sonication process. Taken as a whole, it is apparent that the unique properties (i.e., small size and corresponding large specific surface area) of small nanometer‐scale ZnO particles impose several effects that govern its antibacterial action. These effects are size dependent and do not exist in the range of microscale particles.

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Chemisorption of water vapor on zinc oxide

Cited by 31 publications

References 6 publications

Curious Case of Bactericidal Action of ZnO

Curious Case of Bactericidal Action of ZnO

Load‐Controlled Roll Transfer of Oxide Transistors for Stretchable Electronics

Enhanced Antibacterial Activity of Nanocrystalline ZnO Due to Increased ROS‐Mediated Cell Injury

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