Catalytic growth of semiconducting zinc oxide nanowires and their photoluminescence properties

Wang, Y.W.; Zhang, L.D.; Wang, G.Z.; Xu, Peng; Chu, Zhaoqin; Liang, Changhao

doi:10.1016/s0022-0248(01)01661-x

Cited by 243 publications

(103 citation statements)

References 19 publications

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“…The 1 H NMR and proton decoupled 13 C NMR spectra were recorded to using a Bruker 400 MHz NMR spectrometer operating at 400 MHz and 100 MHz, respectively. The UV-vis absorption and emission spectra were recorded with PerkinElmer Lambda 35 spectrophotometer and PerkinElmer LS55 spectrofluorimeter, respectively.…”

Section: Spectral Measurementsmentioning

confidence: 99%

“…Thus, the effectiveness of both the photocatalysis and photoelectric energy conversion can be significantly enhanced by depositing noble metals on the surface of ZnO [12]. The properties and applications of noble metal ZnO nanostructured materials are also determined by its morphology, structure and the organization of nanostructured ZnO architectures [13][14][15][16]. ZnO based various ceramics were synthesised by liquid phase sintering of ZnO powder of different sizes and morphologies.…”

Section: Introductionmentioning

confidence: 99%

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Interaction of Fluorescent 2-(1-Methoxynaphthalen-4-Yl)-1-(4-Methoxyphenyl)-4, 5-Diphenyl-1H-Imidazole with Pristine Zno, Cu-Doped Zno and Ag-Doped Zno Nanoparticles

Ponnambalam¹,

Kumar²,

Ramanathan³

2017

Mod Chem Appl

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A sensitive 2-(1-methoxynaphthalen-4-yl)-1-(4-methoxyphenyl)-4, 5-diphenyl-1H-imidazole (MNMPI) fluorescent sensor for nanoparticulates like ZnO, Cu-doped ZnO and Ag-doped ZnO has been designed and synthesized. Facile preparation of ZnO, Cu-doped ZnO and Ag-doped ZnO nanoparticles by sol-gel method using PVP K-30 as templating agents is reported and characterised by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), UVVisible spectroscopy and photoluminescence spectroscopy (PL). The synthesized sensor release is enhanced by nanocrystalline pristine ZnO but is suppressed by Cu-doped ZnO and Ag-doped ZnO nanoparticles. The suppression of fluorescence is additional by copper than by silver doping. The LUMO and HOMO energy gap of MNMPI associated with Cu-doped ZnO are lowers compared to those of pristine ZnO and thus red shift compared to that with pristine ZnO. The average crystallite sizes of ZnO, Cu-doped ZnO and Ag-doped ZnO have been deduced as 32 nm, 36 nm and 26 nm and calculated surface area for ZnO, Cu-doped ZnO and Ag-doped ZnO are 30.04 m 2 /g, 40.66 m 2 /g and 29.37 m 2 /g respectively. The observed enhanced absorbance with the distributed semiconductor nanoparticle is due to adsorption of MNMPI on semiconductor surface. This is because of the efficient transfer of electron from the excited state of the MNMPI to the conduction band of the semiconductor nanoparticle.

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Section: Spectral Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interaction of Fluorescent 2-(1-Methoxynaphthalen-4-Yl)-1-(4-Methoxyphenyl)-4, 5-Diphenyl-1H-Imidazole with Pristine Zno, Cu-Doped Zno and Ag-Doped Zno Nanoparticles

Ponnambalam¹,

Kumar²,

Ramanathan³

2017

Mod Chem Appl

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“…Several pathways have been developed and used to produce crystalline nanowires in different materials systems and in large quantities, including physical vapor deposition (Huang et al 2001, Kong et al 2001Omari et al 2008), electrochemical deposition (Kouklin et al 2001;Kouklin et al 2002;Wang et al 2002), metalorganic chemical vapor deposition (Li et al 2001), and Vapor-Liquid-Solid (VLS) growth methods (Wu and Liu 2002). The VLS pathway provides many technological advantages such as fast growth rates, low probability/ number of the extended defects such as dislocations, the possibility of diameter, and length control of the resultant nanowires.…”

Section: Vls Fabrication and Structural Characteristics Of Cu:zno Nanmentioning

confidence: 99%

“…The VLS pathway provides many technological advantages such as fast growth rates, low probability/ number of the extended defects such as dislocations, the possibility of diameter, and length control of the resultant nanowires. The VLS pathway also has been proven successful and previously used to produce nanowires in a variety of metal oxides, including but not limited to TiO 2 , CdO, Cu 2 O and ZnO (Huang et al 2001;Wang et al 2002;H. Chik et al 2004;Keem et al 2004;Fan et al 2006;Zhao et al 2007;Wischmeier et al 2008).…”

Section: Vls Fabrication and Structural Characteristics Of Cu:zno Nanmentioning

confidence: 99%

Transition Metal-Doped ZnO Nanowires: En Route Towards Multi-colour Light Sensing and Emission Applications

Kouklin¹,

Omari²,

Gupta³

2010

Nanowires Science and Technology

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368and strength of the chemical bonds of wide-band gap semiconductors, photodetectors engineered based on most of metal-oxides can withstand highly elevated T and hostile environments. Despite the fact that carrier mobilities are much smaller in cases of metal oxides compared with those of many conventional semiconductors, owing to the drastically increased dielectric strength of metal oxides, much larger carrier velocities can be readily achieved by applying much higher electric fields/device biases. The property remains critical for reducing the photogenerated carrier transit time and thus improving gain characteristics of the photodetectors. Advances in nanofabrication methodologies now allow growing many metal-oxide nanowires, including in ZnO as dislocation-free, highly faceted single crystals, which according to the above-made discussion show significant promise for diverse nanophotodetector device as well as light-emission applications. At the same time, compared to cSi, ZnO nanowires typically exhibit a very limited intrinsic sensitivity to visible and infrared radiation, whereas the sensitivity to short-wavelength photons also tends to be reduced as a result of their small diameter and relative increase in the number of the surface defect states. In this chapter, we provide a brief review on the progress in engineering highresponsitivity ZnO nanowire photodetectors operating in an extended, i.e., ultravioletvisible spectral range. Particular attention is paid to the use and role of transition metal dopants to enhance the light sensitivity of ZnO nanowires/nanorods grown by seeded vapor-transport methods. Detailed consideration is given to several key aspects pertaining to the transport, photoconduction, and time-response characteristics of two-terminal metalsemiconductor-metal nano-photodetectors operating at both pre-avalanche and avalanche regimes. This review might be important to scientists working in with high-sensitivity and multispectral oxide-based nano-photodetectors, optical switches, and sensors.

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“…It has large exciton binding energy (60mV) and hexagonal shape, and is significantly applied in optics, electronics, sensors and actuators [20,21]. Based on morphological structure and the organization of ZnO, its properties and applications can be determined [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Photosensitization Behavior of 1-(4-fluorophenyl)-2-(naphthalen-1-yl)-4, 5-diphenyl-1H-imidazole by Nanocrystalline ZnO

Kalaiarasi¹,

Ashok²,

Prabakaran³

2018

DJ JECF

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1 H NMR, 13 C NMR, mass spectral and elemental analysis data are used to synthesize and characterize photosensitive imidazole derivative of 1-(4-Fluorophenyl)-2-(Naphthalen-1-yl)-4, 5-Diphenyl-1H-Imidazole [FNDI]. Nano crystalline ZnO synthesized by sol-gel method is characterized by absorption (UV), fluorescence (PL), Fourier-Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM) and Energy Dispersive X ray Spectroscopy (EDS). The nanocrystalline ZnO surface is bounded by the imidazole derivative. Fluorescence enhancement is explained based on Photo-induced Electron Transfer (PET) method, and calculation of apparent binding constant is done. Due to the ligand adsorption on the ZnO nanoparticle, the LUMO and HOMO energy levels of imidazole derivative are lowered, and strong adsorption occurs due to the chemical affinity between the N 2 atom of the imidazole derivative and the Zn ion. Fluorescence enhancement occurs due to the electron injection from photo excited imidazole derivative to the ZnO conduction band.

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Catalytic growth of semiconducting zinc oxide nanowires and their photoluminescence properties

Cited by 243 publications

References 19 publications

Interaction of Fluorescent 2-(1-Methoxynaphthalen-4-Yl)-1-(4-Methoxyphenyl)-4, 5-Diphenyl-1H-Imidazole with Pristine Zno, Cu-Doped Zno and Ag-Doped Zno Nanoparticles

Interaction of Fluorescent 2-(1-Methoxynaphthalen-4-Yl)-1-(4-Methoxyphenyl)-4, 5-Diphenyl-1H-Imidazole with Pristine Zno, Cu-Doped Zno and Ag-Doped Zno Nanoparticles

Transition Metal-Doped ZnO Nanowires: En Route Towards Multi-colour Light Sensing and Emission Applications

Enhancement of Photosensitization Behavior of 1-(4-fluorophenyl)-2-(naphthalen-1-yl)-4, 5-diphenyl-1H-imidazole by Nanocrystalline ZnO

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