The Optical Properties of ZnO Nanoparticles Capped with Polyvinyl Butyral

Tong, Yanhong; Liu, Yichun; Lu, Shouci; Dong, Lin; Chen, Shijian; Xiao, Zhiyan

doi:10.1023/b:jsst.0000039500.48283.5a

Cited by 80 publications

(44 citation statements)

References 11 publications

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“…According to Ratheesh Kumar et al [45], this emission was due to the transition from the conduction band to an acceptor level of antisite oxygen (O Zn ). The peak at 452 nm (2.72 eV) is blue emission, which originates from the defect emission of oxygen vacancies [46] and it is close to previous reported value of 2.66 eV [47]. The PL peaks of annealed films in both atmospheres showed broad emission peaks in violet and blue-green spectral region.…”

Section: Optical Propertiessupporting

confidence: 87%

Resistivity Stability of Ga Doped ZnO Thin Films with Heat Treatment in Air and Oxygen Atmospheres

Rao¹,

Kumar²

2012

JCPT

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The effect of annealing in air and oxygen on structural, electrical and optical properties of gallium doped ZnO thin films was investigated. The X-ray diffraction patterns showed that the films were highly preferentially oriented along (002) plane. After the heat treatment in air and oxygen environments, the intensity of (002) peak was apparently improved. It was found that heat treatment in air atmospheres lead to increase in surface roughness of the film. The GZO films annealed in oxygen at 673 K exhibited low resistivity of 4.21 × 10 -3 Ω·cm, while the resistivity of film annealed in air showed a slightly higher value of 7.14 × 10 -3 Ω·cm. In addition to this, all films have good optical transmittance about 80% in the visible region. It is found from the photoluminescence studies that the broad visible emissions in GZO films originated from the intrinsic shallow traps (V Zn ) and deep level vacancies (Z ni , O Zn and V O ).

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Section: Optical Propertiessupporting

confidence: 87%

Resistivity Stability of Ga Doped ZnO Thin Films with Heat Treatment in Air and Oxygen Atmospheres

Rao¹,

Kumar²

2012

JCPT

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“…Several methods have been reported in the literature for synthesis of ZnO nanoparticles, categorized into either chemical or physical methods, such as nanolithography, physical vapour deposition (PVD), chemical vapour deposition, spray conversion processing, sol-gel process, and precipitation method [10][11][12][13][14][15][16][17]. Among the various methods, precipitation is one of the most important methods to prepare the nanoparticles; the method reduces the temperature of the reaction where homogenous mixtures of the reagents precipitate.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterizations of Zinc Oxide Nanoparticles for Antibacterial Applications

Getie¹,

Belay²,

Ar³

et al. 2017

J Nanomed Nanotechnol

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In this study various shapes and sizes of the wurtzite structure of ZnO nanoparticles were synthesised via a wet chemical method for antibacterial applications. The synthesised ZnO NPs were also modified using biologically active compound, caffeine. The ZnO nanoparticles were investigated by XRD, SEM, FTIR, UV-Vis and Fluorescence spectroscopy. The average crystallite size of the ZnO NPs using XRD was within the ranges of 28.09-31.86 nm. The shape of ZnO NPs synthesised from Zn (NO 3 ) 2 .6H 2 O, ZnCl 2 and Zn (CH 3 COO) 2 .2H 2 O grain, spherical and rod-like respectively. The variations in size and shape of ZnO NPs are due to the difference in precursors and calcinations temperature. The absorption peak of the ZnO NPs was observed at 278 nm, 374 nm and 378 nm for ZnCl 2 , Zn (NO 3 ) 2 .6H 2 O and Zn (CH 3 COO) 2 .2H 2 O respectively. The FTIR peaks due to vibrational phonons of ZnO NPs also confirm the successful production of ZnO nanoparticles. The emission spectra of ZnO NPs were observed in ultraviolet due to the electronic transition from conduction band edge to valence band, and visible emission band due to defects that are related to deep level emissions. The synthesised ZnO NPs were applied for antibacterial activity against S. aureus and E. coli bacteria using agar disc diffusion method. All the three ZnO Nps performed better antibacterial activity than the standard antibiotics and also S. aureus was shown to be more sensitive to ZnO NPs than E. coli.

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“…ZnO QDs samples were prepared by the sol-gel method [15,24,25]. To gain 0.01 mol ZnO QDs, 2.2 g Zn(CH 3-COO) 2 Á2H 2 O (0.01 mol) was dissolved in 100 mL ethyl alcohol and was kept stirring for 30 min.…”

Section: Materials Preparationmentioning

confidence: 99%

“…It is necessary to modify the QDs. In recent years, CdX QDs [10], mercaptoacetic acid [11], PVA [12], PVP [13,14], PVB [15] and TOPO [16] have been used to modify the QDs.…”

Section: Introductionmentioning

confidence: 99%

Enhancing luminescence of ZnO quantum dots by PEG and oleic acid via a sol–gel method

Yang

Wang

et al. 2014

J Mater Sci: Mater Electron

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PEG/oleic acid capped ZnO quantum dots were synthesized by a traditional sol-gel method. The XRD pattern, HRTEM image, FT-IR spectra and photoluminescence properties of the ZnO quantum dots were measured. Viscosities in the reaction with different content of PEG was also measured to discover the way PEG affects the reaction of ZnO quantum dots. PEG and oleic acid could enhance the emission intensity of ZnO quantum dots by cutting down their surface defects. The sample with the content of PEG-400 (n(PEG):n(Zn)) is 1.0:1 and the addition of oleic acid is 2.0 mL (for 0.01 mol ZnO) shows the strongest emission and excitation intensity. However, too much PEG would impede the reaction between Zn(Ac) 2 and LiOH, which leads to the decreasing of the emission intensity.

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The Optical Properties of ZnO Nanoparticles Capped with Polyvinyl Butyral

Cited by 80 publications

References 11 publications

Resistivity Stability of Ga Doped ZnO Thin Films with Heat Treatment in Air and Oxygen Atmospheres

Resistivity Stability of Ga Doped ZnO Thin Films with Heat Treatment in Air and Oxygen Atmospheres

Synthesis and Characterizations of Zinc Oxide Nanoparticles for Antibacterial Applications

Enhancing luminescence of ZnO quantum dots by PEG and oleic acid via a sol–gel method

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