Crystalline Orientation Identification of Multilayer Black Phosphorus Based on the Ag1 and Ag2 Raman Modes for an Orthogonally Polarized Configuration

2021 ◽  
Vol 125 (9) ◽  
pp. 5172-5179
Author(s):  
Rubing Li ◽  
Mingyuan Sun ◽  
Yongchao Shang ◽  
Huadan Xing ◽  
Xiaojie Wang ◽  
...  
Keyword(s):  
Black Phosphorus ◽  
Crystalline Orientation ◽  
Raman Modes

scholarly journals Cover Feature: Identifying the Crystalline Orientation of Black Phosphorus by Using Optothermal Raman Spectroscopy (ChemPhysChem 20/2017)

ChemPhysChem ◽  
2017 ◽  
Vol 18 (20) ◽  
pp. 2826-2826
Author(s):  
Tianyu Wang ◽  
Jing Liu ◽  
Biao Xu ◽  
Ridong Wang ◽  
Pengyu Yuan ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Black Phosphorus ◽  
Crystalline Orientation

scholarly journals Orientation Identification of the Black Phosphorus with Different Thickness Based on B2g Mode Using a Micro-Raman Spectroscope under a Nonanalyzer Configuration

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5572
Author(s):  
Rubing Li ◽  
Yongchao Shang ◽  
Huadan Xing ◽  
Xiaojie Wang ◽  
Mingyuan Sun ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Research Field ◽  
Black Phosphorus ◽  
New Method ◽  
Important Condition ◽  
Crystalline Orientation ◽  
Parallel Polarization ◽  
Good Consistency ◽  
Non Destructive ◽  
Different Thickness

As an anisotropic material, the unique optoelectronic properties of black phosphorus are obviously anisotropic. Therefore, non-destructive and fast identification of its crystalline orientation is an important condition for its application in optoelectronics research field. Identifying the crystalline orientation of black phosphorus through Ag1 and Ag2 modes under the parallel polarization has high requirements on the Raman system, while in the nonanalyzer configuration, the crystalline orientation of the thick black phosphorus may not be identified through Ag1 and Ag2 modes. This work proposes a new method to identify the crystalline orientation of black phosphorus of different thicknesses. This method is conducted under the nonanalyzer configuration by B2g mode. The results show that B2g mode has a good consistency in the identification of crystalline orientations. In this paper, a theoretical model is established to study the angle-resolved Raman results of B2g mode. The new method can accurately identify the crystalline orientation with different layers of black phosphorus without misidentification.

The phonon confinement effect in two-dimensional nanocrystals of black phosphorus with anisotropic phonon dispersions

Nanoscale ◽  
2018 ◽  
Vol 10 (18) ◽  
pp. 8704-8711 ◽  
Author(s):  
Tong Lin ◽  
Xin Cong ◽  
Miao-Ling Lin ◽  
Xue-Lu Liu ◽  
Ping-Heng Tan
Keyword(s):  
Black Phosphorus ◽  
Confinement Effect ◽  
Two Dimensional ◽  
Phonon Confinement ◽  
Raman Modes ◽  
Phonon Confinement Effect

Raman modes of black phosphorus nanocrystals exhibit significant asymmetrical profiles resulting from anisotropic phonon dispersions of the corresponding phonon branches.

In-Plane Uniaxial Strain in Black Phosphorus Enables the Identification of Crystalline Orientation

Small ◽  
2017 ◽  
Vol 13 (30) ◽  
pp. 1700466 ◽  
Author(s):  
Shuqing Zhang ◽  
Nannan Mao ◽  
Juanxia Wu ◽  
Lianming Tong ◽  
Jin Zhang ◽  
...  
Keyword(s):  
Black Phosphorus ◽  
Uniaxial Strain ◽  
Crystalline Orientation

scholarly journals Identifying the Crystalline Orientation of Black Phosphorus by Using Optothermal Raman Spectroscopy

ChemPhysChem ◽  
2017 ◽  
Vol 18 (20) ◽  
pp. 2828-2834 ◽  
Author(s):  
Tianyu Wang ◽  
Jing Liu ◽  
Biao Xu ◽  
Ridong Wang ◽  
Pengyu Yuan ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Black Phosphorus ◽  
Crystalline Orientation

Applications of Photoelectron Microscopy

1976 ◽  
Vol 34 ◽  
pp. 506-507
Author(s):  
William J. Baxter
Keyword(s):  
Electron Microscopy ◽  
Thermal Decomposition ◽  
Chemical Composition ◽  
Ultraviolet Radiation ◽  
Thin Layer ◽  
Edge Effects ◽  
Electron Optics ◽  
Surface Layers ◽  
Crystalline Orientation ◽  
Fluorescent Screen

In this form of electron microscopy, photoelectrons emitted from a metal by ultraviolet radiation are accelerated and imaged onto a fluorescent screen by conventional electron optics. image contrast is determined by spatial variations in the intensity of the photoemission. The dominant source of contrast is due to changes in the photoelectric work function, between surfaces of different crystalline orientation, or different chemical composition. Topographical variations produce a relatively weak contrast due to shadowing and edge effects.Since the photoelectrons originate from the surface layers (e.g. ∼5-10 nm for metals), photoelectron microscopy is surface sensitive. Thus to see the microstructure of a metal the thin layer (∼3 nm) of surface oxide must be removed, either by ion bombardment or by thermal decomposition in the vacuum of the microscope.

Biomimetic Extracellular Vesicles Embedded with Black Phosphorus for Molecular Recognition-Guided Biomineralization

2018 ◽  
Author(s):  
Yingqian Wang ◽  
Xiaoxia Hu ◽  
Lingling Zhang ◽  
Chunli Zhu ◽  
Jie Wang ◽  
...  
Keyword(s):  
Molecular Recognition ◽  
Extracellular Vesicles ◽  
Inorganic Phosphate ◽  
Physiological Activity ◽  
Medical Engineering ◽  
Matrix Vesicles ◽  
Black Phosphorus ◽  
Photothermal Effect ◽  
Biological Processes ◽  
Extracellular Environment

Extracellular vesicles (EVs) are involved in the regulation of cell physiological activity and the reconstruction of extracellular environment. Matrix vesicles (MVs) are a type of EVs, and they participate in the regulation of cell mineralization. Herein, bioinspired MVs embedded with black phosphorus are functionalized with cell-specific aptamer (denoted as Apt-bioinspired MVs) for stimulating biomineralization. The aptamer can direct bioinspired MVs to targeted cells, and the increasing concentration of inorganic phosphate originated from the black phosphorus can facilitate cell biomineralization. The photothermal effect of the Apt-bioinspired MVs also positively affects mineralization. In addition, the Apt-bioinspired MVs display outstanding bone regeneration performance. Considering the excellent behavior of the Apt-bioinspired MVs for promoting biomineralization, our strategy provides a way of designing bionic tools for studying the mechanisms of biological processes and advancing the development of medical engineering.<br>

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