2013年4月1日 · In the UV region, the main absorption peaks of the ZnO samples (a) nanoparticles, (b) nanoflowers and (c) nanorods are about 368 nm (3.37 eV), 370 nm (3.35 eV) and 378 nm (3.28 eV), respectively. It is clearly observed that the absorption peaks showed a blue shift as the crystallite size of the samples decreases.

2024年6月1日 · This excitonic absorption peak at 300 nm, 366 nm and 382 nm indicates the energy level at which electronic transitions occur within ZnO nanoparticles. Specifically, this peak corresponds to the creation of excitons, which are bound pairs of electrons and holes generated when electrons are excited from the valence band to the conduction band.

2023年1月1日 · The hexagonal wurtzite structure ZnO (JCPDS number 65–3411) diffraction peaks are all seen. No ZnO phase diffraction peaks were found, indicating pure ZnO nanoparticles with a hexagon generated. Increasing calcination temperature strengthens and sharpens XRD peaks, suggesting that materials are crystallized well and particle size increases.

2022年11月21日 · The FTIR spectra of the ZnO NPs shows a characteristic peak of the Zn–O bonding at 645.9 cm −1.

3 天之前 · This confirms the incorporation of Ni 2+ and Co 2+ ions as a substitute for Zn 2+ ions in the ZnO structure 36. The peaks around 1630 cm −1 and the peak at 3420 cm −1 are assigned to the O–H ...

2025年3月19日 · The photoluminescence spectrum showed a characteristic ultraviolet emission peak around 387 nm and green emissions peaks from ZnO when excitation wavelength of 325 and 488 nm were experiment, respectively. Finally, ZnO nanoparticles were used to reveal latent fingerprints on non-porous surfaces using a 325 nm laser.

The distribution of zinc (Zn) and oxygen (O) peaks in the matrix agrees with pureness of ZnO nanoparticles. The presence of Ag peak in the EDS array confirms the doping of silver in the ZnO. Table ST-2 (Supporting Information) shows the atomic wt …

2014年7月30日 · The X-ray peak broadening of ZnO nanoparticles annealed at 550 °C was due to the small crystallite size and lattice strain. The peak broadening was analyzed by the Scherrer’s equation, SSP and modified forms of W–H models viz. UDM, UDSM, and UDEDM.

2012年5月22日 · In the present study, we report the synthesis of ZnO nanoparticles using chemical method and the characterization of ZnO nanoparticles using X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), UV-vis absorbance, and photoluminescence spectra is discussed.

2023年7月3日 · Comprehensive characterization of Co/Cr, Fe/Cr, and Mg/Cr -codoped ZnO nanoparticles by solution combustion method for improved battery-type supercapacitor performance. Ceramics International 2024, 100 https://doi.org/10.1016/j.ceramint.2024.12.294