Growth and characterization of InAs quantum dots on InP nanowires with zinc blende structure

Cu2+-doped ZnSe quantum dots (ZnSe:Cu) were prepared via a green and simple route, namely the chemical coprecipitation method. Under 365 nm UV excitation, green emission is observed. X-ray powder diffraction (XRD) shows that ZnSe:Cu nanoparticle is cubic zinc blende structure; the transmission electron microscopy (TEM) exhibits that the average diameter of ZnSe:Cu nanocrystals is less than 10 nm. UV-vis spectrophotometer and fluorescence spectrophotometer indicate that ZnSe:Cu nanocrystals have good fluorescence effects.

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Dual-comb-based asynchronous pump-probe measurement with an ultrawide temporal dynamic range for characterization of photo-excited InAs quantum dots

Applied Physics Express ◽

10.35848/1882-0786/ab8b4f ◽

2020 ◽

Vol 13 (6) ◽

pp. 062003

Author(s):

Akifumi Asahara ◽

Yuto Arai ◽

Tomohiro Saito ◽

Junko Ishi-Hayase ◽

Kouichi Akahane ◽

...

Keyword(s):

Quantum Dots ◽

Dynamic Range ◽

Probe Measurement ◽

Temporal Dynamic ◽

Pump Probe ◽

Inas Quantum Dots

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Synthesis and Characterization of ZnS: Fe/ZnS Core-Shell Nanocrystals

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.148-149.900 ◽

2011 ◽

Vol 148-149 ◽

pp. 900-903

Author(s):

Li Hua Li ◽

Yong Jun Gu ◽

Rui Shi Xie ◽

Jian Guo Zhu

Keyword(s):

Chemical Precipitation ◽

Precipitation Method ◽

Core Shell ◽

X Ray Diffraction ◽

Pl Spectra ◽

Zinc Blende ◽

Diffraction Peaks ◽

Zns Nanocrystals ◽

Zinc Blende Structure

ZnS:Fe and ZnS:Fe/ZnS core-shell nanocrystals were synthesized by chemical precipitation method. It was found that the ZnS: Fe based nanocrystals possess zinc blende structure. Compared to ZnS: Fe nanocrystals, the intensity of the X-ray diffraction peaks of ZnS: Fe/ZnS nanocrystals reduced and these peaks moved to lower angles. TEM images show that ZnS: Fe based nanocrystals are spheroidal and the average particles size is about 3~4 nm. PL spectra of ZnS: Fe nanocrystals revealed several mission bands, ~406nm, ~444nm, ~416nm, However, PL spectra of ZnS: Fe/ZnS nanocrystals showed several mission bands, ~420nm, ~432nm, ~449nm.

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Characterization of ZnSe Nanoparticles Prepared Using Ultrasonic Radiation Method

MRS Proceedings ◽

10.1557/proc-536-401 ◽

1998 ◽

Vol 536 ◽

Author(s):

Jianfeng Xu ◽

Wei Ji ◽

Sing-Hai Tang ◽

Wei Huang

Keyword(s):

Xps Analysis ◽

Phonon Modes ◽

Znse Nanoparticles ◽

Raman Scattering Spectroscopy ◽

Ultrasonic Radiation ◽

Radiation Method ◽

Zinc Blende ◽

Average Size ◽

Zinc Blende Structure

AbstractZnSe nanoparticles with an average size of 15 nm were prepared using the ultrasonic radiation method. The characterization was carried out by means of XRD, TEM, XPS and Raman scattering spectroscopy. The experimental results indicate that the as-prepared powders are composed of ZnSe with zinc-blende structure. The high purity of ZnSe particles was confirmed by XPS analysis. In the Raman spectra, TO and LO phonon modes were observed at 205 and 257 cm−1 in the ZnSe nanoparticles.

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A greener synthetic route to monodisperse CdSe quantum dots with zinc-blende structure

Journal of Crystal Growth ◽

10.1016/j.jcrysgro.2008.01.059 ◽

2008 ◽

Vol 310 (11) ◽

pp. 2890-2894 ◽

Cited By ~ 13

Author(s):

Chun Wang ◽

Yang Jiang ◽

Guohua Li ◽

Zhongping Zhang ◽

Jianfeng Shi ◽

...

Keyword(s):

Quantum Dots ◽

Cdse Quantum Dots ◽

Synthetic Route ◽

Zinc Blende ◽

Zinc Blende Structure

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Growth and Characterization of Inas Quantum Dots on Silicon

MRS Proceedings ◽

10.1557/proc-583-33 ◽

1999 ◽

Vol 583 ◽

Cited By ~ 3

Author(s):

L. Hansen ◽

A. Ankudinov ◽

F. Bensing ◽

J. Wagner ◽

G. Ade ◽

...

Keyword(s):

Quantum Dots ◽

Molecular Beam Epitaxy ◽

Molecular Beam ◽

The Other ◽

Material System ◽

Inas Quantum Dots ◽

New Material ◽

The One ◽

Insight Into

AbstractUp to 1011 cm−2 InAs quantum dots (QD) can be grown on Silicon(001) by molecular beam epitaxy. This very new material system is on the one hand interesting with regard to the integration of optoelectronics with silicon technology on the other hand it offers new insight into the formation of QDs. We report on RHEED, TEM and Raman studies about (in-) coherence of the QDs and on an according to our knowledge so far unknown dewetting transition in this material system. The results are being discussed on the basis of a thermodynamic model, assuming a liquid-like behavior of a strained adlayer.

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Characterization of Electrolytically Deposited CdSe on Ti Substrates

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.297-301.912 ◽

2010 ◽

Vol 297-301 ◽

pp. 912-917 ◽

Cited By ~ 3

Author(s):

T.G. Argyropoulos ◽

Jelica Novakovic ◽

M.D. Athanassopoulou ◽

P. Vassiliou ◽

J.A. Mergos ◽

...

Keyword(s):

Heat Treatment ◽

High Temperature ◽

Surface Morphology ◽

Bath Temperature ◽

Vacuum Heat Treatment ◽

Bath Solution ◽

Zinc Blende ◽

Zinc Blende Structure

Electrolytical deposition of CdSe on Ti substrates from CdSO4 - SeO2 solutions is investigated. The effect of the bath temperature was investigated and how it affects the CdSe deposits. According to the XRD spectra, the obtained CdSe films exhibit the cubic zinc-blende structure that remains unaffected by vacuum heat treatment (650°C). The surface morphology of the films differs significantly with bath solution temperatures. When Au contacts are used, the Ti/CdSe/Au structure may exhibit rectifying properties depending on the temperature during the electrodeposition. High temperature baths make the deposits to obtain ohmic properties.

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Effect of L-Cysteine on Photoluminescence of Zns:F Quantum Dots

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.281.716 ◽

2018 ◽

Vol 281 ◽

pp. 716-722

Author(s):

Xiao Xuan Wang ◽

Shu Zhen Wang ◽

Shu Wang Duo ◽

Xing Yu Jiang ◽

Wen Li Li ◽

...

Keyword(s):

Quantum Dots ◽

Water Solubility ◽

Luminescent Properties ◽

Solid State Method ◽

X Ray ◽

Zinc Blende ◽

Transmission Electron ◽

Structure Surface ◽

State Method ◽

Zinc Blende Structure

ZnS:F quantum dots (QDs) capping with and without L-cys were synthesized by a solid-state method at low temperature, and the influence of L-cys on the properties of ZnS:F QDs were investigated. The crystal structure, surface morphology and luminescent properties of the samples were analyzed by X-ray diffractometer (XRD), transmission electron microscope (TEM), fourier transform infrared (FTIR), photoluminescence spectrometer (PL) and ultraviolet-visible spectrometer (UV-Vis). The results showed that all samples had a zinc blende structure with particle size in the range of 2-6 nm. The emission intensity was significantly enhanced after capping with L-cys, and the strongest luminescence was obtained when the ratio of L-cys/ZnS:F was 0.8:1, and was about 2.5 times of that of ZnS:F QDs. The capping of L-cys increased the grain size of ZnS:F QDs and their water solubility.

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