scholarly journals Composition profiles of InAs–GaAs quantum dots determined by medium-energy ion scattering

2005 ◽  
Vol 87 (15) ◽  
pp. 153110 ◽  
Author(s):  
P. D. Quinn ◽  
N. R. Wilson ◽  
S. A. Hatfield ◽  
C. F. McConville ◽  
G. R. Bell ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Medium Energy ◽  
Ion Scattering ◽  
Composition Profiles ◽  
Medium Energy Ion Scattering

scholarly journals Synthesis and Growth Mechanism of Stable Prenucleated (≈0.8 nm Diameter) PbS Quantum Dots by Medium Energy Ion Scattering Spectroscopy

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1109
Author(s):  
Young Park ◽  
Seung Park ◽  
Kang-Won Jung ◽  
Yunju Hwang ◽  
Saurav Sorcar ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Growth Mechanism ◽  
Nucleation Theory ◽  
Classical Nucleation Theory ◽  
Medium Energy ◽  
Ion Scattering ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Medium Energy Ion Scattering ◽  
Pbs Quantum Dots

In the current work, stable prenucleated PbS quantum dots (QDs) with a sub-nanometer (0.8 nm) size have been successfully synthesized via a systematically designed experiment. A detailed analysis of critical nucleation, growth, and stability for such ultrasmall prenucleated clusters is done. The experimental strategy is based on controlled concentration, temperature and injection of respective precursors, thus enabling us to control nucleation rate and separation of stable sub-nanometer PbS QDs with size 0.8 nm. Significantly, by providing additional thermal energy to sub-nanometer PbS QDs, we achieved the fully nucleated cubic crystalline structure of PbS with size of around 1.5 nm. The size and composition of the prenucleated QDs are investigated by sophisticated tools like X-ray photoelectron spectroscopy (XPS) and medium energy ion scattering (MEIS) spectroscopy which confirms the synthesis of PbS with Pb2+ rich surface while the UV-Vis spectroscopy and X-ray diffraction (XRD) data suggests an alternative crystallization path. Non-classical nucleation theory is employed to substantiate the growth mechanism of prenucleated PbS QDs.

scholarly journals Structural characterization of CdSe/ZnS quantum dots using medium energy ion scattering

2012 ◽  
Vol 101 (2) ◽  
pp. 023110 ◽  
Author(s):  
M. A. Sortica ◽  
P. L. Grande ◽  
C. Radtke ◽  
L. G. Almeida ◽  
R. Debastiani ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Structural Characterization ◽  
Medium Energy ◽  
Ion Scattering ◽  
Medium Energy Ion Scattering

Structure Determination of the Nisi2(111) Surface Using Medium Energy Ion Scattering with Monolayer Resolution

1990 ◽  
Vol 202 ◽  
Author(s):  
J. Vrijmoeth ◽  
P.M. Zagwijn ◽  
J.W.M. Frenken ◽  
J.F. van der Veen
Keyword(s):  
Surface Structure ◽  
Structure Determination ◽  
New Method ◽  
Medium Energy ◽  
Ion Scattering ◽  
Triple Layer ◽  
Medium Energy Ion Scattering

ABSTRACTThe surface structure of epitaxial NiSi2 films grown on Si (111) has been determined using a new method. The backscattering signals from subsequent Ni layers in the NiSi2 (111) surface are resolved.The topology of the NiSi2 (111) surface is concluded to be bulklike, i.e., it is terminated by a Si – Ni – Si triple layer.

Depth-profiling the composition of bimetallic nanoparticles using medium energy ion scattering

2011 ◽  
Vol 605 (1-2) ◽  
pp. 220-224 ◽  
Author(s):  
Johan Gustafson ◽  
Andrew R. Haire ◽  
Christopher J. Baddeley
Keyword(s):  
Bimetallic Nanoparticles ◽  
Depth Profiling ◽  
Medium Energy ◽  
Ion Scattering ◽  
Medium Energy Ion Scattering

Surface structure of sphalerite studied by medium energy ion scattering and XPS

2007 ◽  
Vol 601 (2) ◽  
pp. 352-361 ◽  
Author(s):  
S.L. Harmer ◽  
L.V. Goncharova ◽  
R. Kolarova ◽  
W.N. Lennard ◽  
M.A. Muñoz-Márquez ◽  
...  
Keyword(s):  
Surface Structure ◽  
Medium Energy ◽  
Ion Scattering ◽  
Medium Energy Ion Scattering
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