Wyniki wyszukiwania - Biblioteka Nauki

Ten serwis zostanie wyłączony 2025-02-11.

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

3 Acta Physica Polonica A

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Synthesis and Characterization of ZnO Doped with Fe_{2}O_{3} - Hydrothermal Synthesis and Calcination Process

100%

Sibera D. , Jędrzejewski R. , Mizeracki J. , Presz A. , Narkiewicz U. , Łojkowski W.

Acta Physica Polonica A

2009

tom 116

nr S

S-133-S-135

The aim of the present work is to compare two methods of synthesis of nanocrystallline zinc oxide doped with iron oxide. The synthesis was carried out using microwave asssisted hydrothermal synthesis and traditional wet chemistry method followed by calcination. The phase composition of the samples was determined using X-ray diffraction measurements. Depending on the chemical composition of the samples, hexagonal ZnO, and/or cubic ZnFe_{2}O_{4} were identified. The morphology of the received materials was characterized using scanning electron microscopy. Two different structures of agglomerates were observed: a hexagonal structure (corresponding to zinc oxide) and spherical (corresponding to spinel phase). The effect of the iron oxide concentration on specific surface area and density of the samples was determined.

Photoluminescence Properties of ZnO Nanowires Grown on Ni Substrate

67%

Zaleszczyk W. , Fronc K. , Przeździecka E. , Janik E. , Czapkiewicz M. , Wróbel J. , Paszkowicz W. , Kłopotowski Ł. , Karczewski G. , Wojtowicz T. , Presz A.

nr 5

1451-1456

Photoluminescence studies of zinc oxide nanowires produced by a carbo-thermal method on a nickel foil substrate are reported. Two types of as-grown samples: the first - containing only buffer film, and the second - containing both zinc oxide nanowires and buffer film grown in the same technological process, were investigated by means of the temperature-dependent photoluminescence. X-ray diffraction measurements of buffer film show that it is polycrystalline and is composed from wurtzite-type ZnO (main phase) and includes minority phases: rock salt type (Ni,Zn)O and hexagonal C₃N₄. The shape of the apparently monocrystalline nanowires is characterized by hexagonal section matching with the expectations of the hexagonal ZnO structure. The presence of LO-phonon replicas in photoluminescence spectra for the second sample is used as an argument for confirmation that ZnO nanowires are single crystalline. The method of growth of ZnO nanowires on nickel oxide opens perspectives to produce Zn_{1-x}Ni_{x}O diluted magnetic semiconductor nanowires.

Growth and Properties of ZnMnTe Nanowires

59%

Zaleszczyk W. , Janik E. , Presz A. , Szuszkiewicz W. , Morhange J. , Dłużewski P. , Kret S. , Kirmse H. , Neumann W. , Dynowska E. , Domagała J. , Caliebe W. , Aleszkiewicz M. , Pacuski W. , Golnik A. , Kossacki P. , Baczewski L. , Petroutchik A. , Karczewski G. , Wojtowicz T.

nr 2

351-356

Catalytically enhanced growth of ZnMnTe diluted magnetic semiconductor nanowires by molecular beam epitaxy is reported. The growth is based on the vapor-liquid-solid mechanism and was performed on (001) and (011)-oriented GaAs substrates from elemental sources. X-ray diffractometry, scanning and transmission electron microscopy, atomic force microscopy, photoluminescence spectroscopy, and Raman scattering were performed to determine the structure of nanowires, their chemical composition, and morphology. These studies revealed that the obtained ZnMnTe nanowires possess zinc-blende structure, have an average diameter of about 30 nm, typical length between 1 and 2μm and that Mn^{2+} ions were incorporated into substitutional sites of the ZnTe crystal lattice.