Laser ablation synthesis of indium oxide nanoparticles in water

Acacia, N.; Barreca, Francesco; Barletta, E.; Spadaro, D.; Currò, Giuseppe; Neri, F.

doi:10.1016/j.apsusc.2010.05.003

Cited by 44 publications

(24 citation statements)

References 28 publications

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“…Thus, it is indicated that the higher the deposition temperature, the less the impurity of C in the deposited In 2 O 3 film. Figure 4b depicts the In 3d XPS spectra of the In 2 O 3 films, clearly demonstrating one-doublet Gaussian peaks at 444.7 and 452.3 eV, which are associated with In 3d 5/2 and In 3d 5/2 core levels for In 2 O 3 [22, 23]. The O 1 s XPS spectra are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Atomic-Layer-Deposition of Indium Oxide Nano-films for Thin-Film Transistors

Zheng

Shao

et al. 2018

Nanoscale Res Lett

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Atomic-layer-deposition (ALD) of In2O3 nano-films has been investigated using cyclopentadienyl indium (InCp) and hydrogen peroxide (H2O2) as precursors. The In2O3 films can be deposited preferentially at relatively low temperatures of 160–200 °C, exhibiting a stable growth rate of 1.4–1.5 Å/cycle. The surface roughness of the deposited film increases gradually with deposition temperature, which is attributed to the enhanced crystallization of the film at a higher deposition temperature. As the deposition temperature increases from 150 to 200 °C, the optical band gap (Eg) of the deposited film rises from 3.42 to 3.75 eV. In addition, with the increase of deposition temperature, the atomic ratio of In to O in the as-deposited film gradually shifts towards that in the stoichiometric In2O3, and the carbon content also reduces by degrees. For 200 °C deposition temperature, the deposited film exhibits an In:O ratio of 1:1.36 and no carbon incorporation. Further, high-performance In2O3 thin-film transistors with an Al2O3 gate dielectric were achieved by post-annealing in air at 300 °C for appropriate time, demonstrating a field-effect mobility of 7.8 cm2/V⋅s, a subthreshold swing of 0.32 V/dec, and an on/off current ratio of 107. This was ascribed to passivation of oxygen vacancies in the device channel.

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Section: Resultsmentioning

confidence: 99%

Atomic-Layer-Deposition of Indium Oxide Nano-films for Thin-Film Transistors

Zheng

Shao

et al. 2018

Nanoscale Res Lett

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“…Their results show particles formation with diameters of 5-7 nm and agglomerations of 100-200 nm, which increases with laser fluence. Laser ablation in liquid has the potential of stimulating chemical reactions during laser irradiation, which can be used to control particles size and functionalizing the surface of nanomaterials to prevent aggregation and precipitation [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity of TiO2 Nanoparticles Prepared by One-Step Laser Ablation in Liquid

Khashan

Sulaiman

Abdulameer³

et al. 2021

Applied Sciences

107

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Laser ablation in liquid was utilized to prepare a TiO2 NP suspension in in deionized distilled water using Q-switch Nd: YAG laser at various laser energies and ablation times. The samples were characterized using UV–visible absorption spectra obtained with a UV–visible spectrophotometer (UV-Vis,) Fourier transform infrared (FTIR), X-ray diffraction (XRD), and transmission electron microscope (TEM). While, UV-Vis spectra showed the characteristic band-to-band absorption peak of TiO2 NPs in the UV range. FTIR analysis showed the existence of O-Ti-O bond. XRD patterns indicated the presence of (101) and (112) plane crystalline phases of TiO2. TEM images showed a spherical-like structure of TiO2 NPs with various size distributions depending on the ablation period. It was also found that there is a relationship between laser ablation time and TiO2 NP size distribution, where longer ablation times led to the smaller size distribution. The antibacterial activity of TiO2 NPs was evaluated with different species of bacteria such as Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris, and Staphylococcus aureus, using the liquid approach. The optimum activity of TiO2 NPs is found to be against E. coli at 1000 μg mL−1. Furthermore, adding, TiO2 NPs (1000 μg mL−1) in the presence of amoxicillin has a synergic effect on E. coli and S. aureus growth, as measured by the well diffusion method. However, both E. coli (11.6 ± 0.57mm) and S. aureus (13.3 ± 0.57mm) were inhibited by this process.

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“…When a liquid is used as the confining medium through which the ablation plasma expands, a colloidal solution is obtained. By pulsed laser ablation in liquid (PLAL), using a nano/picosecond laser source, surfactant-free NPs are produced in a single-step approach within a time scale of a few minutes [8]. In a stationary liquid, the process consists of the production of NPs by ablation of the target, and the contemporaneous fragmentation-assembling of dispersed NPs by continuous irradiation of already synthesized particles.…”

Section: Introductionmentioning

confidence: 99%