Atomic-scale visualization of metallic lead leak related fine structure in CsPbBr3 quantum dots

Nanoscale ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 124-130
Author(s):  
Xinyu Liu ◽  
Jianlin Wang ◽  
Chaojie Ma ◽  
Xudan Huang ◽  
Kaihui Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electronic Structure ◽  
Fine Structure ◽  
Atomic Scale ◽  
Atomic Resolution ◽  
Metallic Lead ◽  
Cspbbr3 Quantum Dots ◽  
Atomic And Electronic Structure

The fine atomic and electronic structure of Pb-leaked CsPbBr3 quantum dots have been revealed using atomic-resolution STEM.

Effect of Size on the Electronic Structure and Optical Properties of Cubic CsPbBr3 Quantum Dots

2020 ◽  
Vol 56 (1) ◽  
pp. 1-7
Author(s):  
Qiran Chen ◽  
Zhigang Song ◽  
Daohua Zhang ◽  
Handong Sun ◽  
Weijun Fan
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Electronic Structure ◽  
Cspbbr3 Quantum Dots

Chemistry and Bonding at {222}Mgo/Cu Heterophase Interfaces

1997 ◽  
Vol 3 (S2) ◽  
pp. 647-648
Author(s):  
D. A. Müller ◽  
D. A. Shashkov ◽  
R. Benedek ◽  
L. H. Yang ◽  
D. N. Seidman ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Fine Structure ◽  
Energy Loss ◽  
High Spatial Resolution ◽  
Experimental Studies ◽  
Electronic States ◽  
Atomic Scale ◽  
Interfacial Chemistry ◽  
Local Electronic Structure ◽  
Electron Energy Loss

Adhesion at ceramic/metal (C/M) interfaces often controls the macroscopic behavior of materials containing metallic and ceramic phases, and experimental studies of bonding at C/M interfaces have recently been reported. Electron energy loss spectroscopy (EELS) offers unique opportunities to examine bonding at interfaces on an atomic scale. The EELS near edge fine structure is sensitive to local atomic arrangements and thus can be used as a coordination fingerprint. Much more can be done, however, by analyzing the connection between the EELS fine structure, the underlying local electronic structure and the cohesive energy of an interface to gain a deeper understanding of the nature of the adhesion at the interface.In this work, we apply high spatial-resolution EELS instrument to study {222} MgO/Cu interfaces produced by internal oxidation. We determine interfacial chemistry of this interface with subnanometer resolution (Fig. 1) and use EELS to directly measure the electronic states pertaining to the interface

Local atomic and electronic structure of quantum dots based on Mn- and Co-doped ZnS

2017 ◽  
Vol 58 (1) ◽  
pp. 45-52 ◽  
Author(s):  
A. N. Kravtsova ◽  
A. P. Budnik ◽  
I. A. Pankin ◽  
T. A. Lastovina ◽  
A. L. Bugaev ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electronic Structure ◽  
Atomic And Electronic Structure ◽  
Co Doped

Atomic-Scale Imaging

2021 ◽  
pp. 187-234
Author(s):  
C. Julian Chen
Keyword(s):  
Electronic Structure ◽  
Transition Metal ◽  
Fermi Level ◽  
Electronic States ◽  
Atomic Scale ◽  
Atomic Resolution ◽  
First Principle ◽  
Spin Polarized ◽  
Quantitative Explanation

This chapter discusses the imaging mechanism of STM and AFM at the atomic scale. Experimental facts show that at atomic resolution, tip electronic states play a key role. Analytic theoretical treatments provide quantitative explanation of the effect of the tip electronic states. On transition-metal tips, first-principle studies unanimously show that d-type tip electronic states dominate the Fermi-level DOS. First-principle studies of the combined tip-sample systems show that for both STM and AFM, the p- and d-type tip electronic states are the keys to understanding the atomic-scale images. The case of spin-polarized STM and the chemical identification of surface atoms are also discussed in terms of tip electronic structure. The chapter concludes with discussions of experimental verifications of the reciprocity principle: at atomic resolution, the role of tip electronic states and the sample electronic states are interchangeable.

Atomic and electronic structure of CdS-based quantum dots

2015 ◽  
Vol 56 (3) ◽  
pp. 517-522 ◽  
Author(s):  
A. N. Kravtsova ◽  
M. A. Soldatov ◽  
S. A. Suchkova ◽  
V. V. Butova ◽  
A. L. Bugaev ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electronic Structure ◽  
Atomic And Electronic Structure

scholarly journals Real-space localization and quantification of hole distribution in chain-ladder Sr3Ca11Cu24O41 superconductor

2016 ◽  
Vol 2 (3) ◽  
pp. e1501652 ◽  
Author(s):  
Matthieu Bugnet ◽  
Stefan Löffler ◽  
David Hawthorn ◽  
Hanna A. Dabkowska ◽  
Graeme M. Luke ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Physical Properties ◽  
Inelastic Scattering ◽  
Cuprate Superconductors ◽  
Scanning Transmission Electron Microscope ◽  
Real Space ◽  
Atomic Scale ◽  
Atomic Resolution ◽  
Space Localization ◽  
Chain Ladder

Understanding the physical properties of the chain-ladder Sr3Ca11Cu24O41 hole-doped superconductor has been precluded by the unknown hole distribution among chains and ladders. We use electron energy-loss spectrometry (EELS) in a scanning transmission electron microscope (STEM) at atomic resolution to directly separate the contributions of chains and ladders and to unravel the hole distribution from the atomic scale variations of the O-K near-edge structures. The experimental data unambiguously demonstrate that most of the holes lie within the chain layers. A quantitative interpretation supported by inelastic scattering calculations shows that about two holes are located in the ladders, and about four holes in the chains, shedding light on the electronic structure of Sr3Ca11Cu24O41. Combined atomic resolution STEM-EELS and inelastic scattering calculations is demonstrated as a powerful approach toward a quantitative understanding of the electronic structure of cuprate superconductors, offering new possibilities for elucidating their physical properties.

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