scholarly journals New Spiral Form of Carbon Nitride with Ultrasoftness and Tunable Electronic Structures

ACS Omega ◽  
2020 ◽  
Author(s):  
Hongxia Bu ◽  
Bo Yang ◽  
Huimin Yuan ◽  
Xiaojuan Yuan ◽  
Hui Wang ◽  
...  
Keyword(s):  
Electronic Structures ◽  
Carbon Nitride ◽  
Spiral Form

scholarly journals Computational design of graphitic carbon nitride photocatalysts for water splitting

2021 ◽  
Author(s):  
Gareth O. Hartley ◽  
Natalia Martsinovich
Keyword(s):  
Water Splitting ◽  
Electronic Structures ◽  
Carbon Nitride ◽  
Computational Design ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride

We investigated the electronic structures of novel graphitic carbon nitride-based materials by replacing the nitrogen linker with heteroatoms or aromatic groups.

Stability and electronic structures of triazine-based carbon nitride nanotubes

RSC Advances ◽  
2015 ◽  
Vol 5 (15) ◽  
pp. 10892-10898 ◽  
Author(s):  
Fazel Shojaei ◽  
Hong Seok Kang
Keyword(s):  
Carbon Nanotubes ◽  
Electronic Structures ◽  
Strain Energy ◽  
Carbon Nitride ◽  
Magnetic Semiconductor ◽  
Single Layer ◽  
Boron Doping

In contrast to the case of carbon nanotubes, the negative strain energy indicates that single-walled and double-walled triazine-based carbon nitride nanotubes (TACNNTs) are appreciably more stable than the single layer and the bilayer of gt-C3N4, respectively. Boron-doping turns the material into a magnetic semiconductor.

scholarly journals Stabilities and novel electronic structures of three carbon nitride bilayers

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Wanxing Lin ◽  
Shi-Dong Liang ◽  
Chunshan He ◽  
Wucheng Xie ◽  
Haiying He ◽  
...  
Keyword(s):  
Electronic Structures ◽  
Carbon Nitride

Regulating morphological and electronic structures of polymeric carbon nitrides by successive copolymerization and stream reforming for photocatalytic CO2 reduction

2021 ◽  
Author(s):  
Ruirui Wang ◽  
Pengju Yang ◽  
Sibo Wang ◽  
Xinchen Wang
Keyword(s):  
Electronic Structures ◽  
Carbon Nitride ◽  
Co2 Reduction ◽  
Carbon Nitrides ◽  
Polymeric Carbon

Greatly reinforced photocatalytic CO2 reduction is realized with carbon nitride polymers tailored via a coupled copolymerization and stream reforming strategy.

Preparation and characterization of thin films of carbon nitride

1995 ◽  
Vol 53 ◽  
pp. 104-105
Author(s):  
L. Wan ◽  
R. F. Egerton
Keyword(s):  
Carbon Nitride ◽  
Arc Discharge ◽  
Ion Beam ◽  
Chemical Vapor ◽  
Reactive Sputtering ◽  
Vacuum Arc ◽  
Specimen Preparation ◽  
Bonding Structure ◽  
Electron Energy Loss

INTRODUCTION Recently, a new compound carbon nitride (CNx) has captured the attention of materials scientists, resulting from the prediction of a metastable crystal structure β-C3N4. Calculations showed that the mechanical properties of β-C3N4 are close to those of diamond. Various methods, including high pressure synthesis, ion beam deposition, chemical vapor deposition, plasma enhanced evaporation, and reactive sputtering, have been used in an attempt to make this compound. In this paper, we present the results of electron energy loss spectroscopy (EELS) analysis of composition and bonding structure of CNX films deposited by two different methods.SPECIMEN PREPARATION Specimens were prepared by arc-discharge evaporation and reactive sputtering. The apparatus for evaporation is similar to the traditional setup of vacuum arc-discharge evaporation, but working in a 0.05 torr ambient of nitrogen or ammonia. A bias was applied between the carbon source and the substrate in order to generate more ions and electrons and change their energy. During deposition, this bias causes a secondary discharge between the source and the substrate.

The rod-to-coccoid body transformation in cultures of Helicobacter pylori

1990 ◽  
Vol 48 (3) ◽  
pp. 626-627
Author(s):  
A. R. Crooker ◽  
W. G. Kraft ◽  
T. L. Beard ◽  
M. C. Myers
Keyword(s):  
Helicobacter Pylori ◽  
Growth Cycle ◽  
Negative Bacterium ◽  
Body Formation ◽  
Coccoid Form ◽  
Spiral Form ◽  
Prolonged Culture ◽  
H Pylori ◽  
Upper Gastrointestinal

Helicobacter pylori is a microaerophilic, gram-negative bacterium found in the upper gastrointestinal tract of humans. There is strong evidence that H. pylori is important in the etiology of gastritis; the bacterium may also be a major predisposing cause of peptic ulceration. On the gastric mucosa, the organism exists as a spiral form with one to seven sheathed flagella at one (usually) or both poles. Short spirals were seen in the first successful culture of the organism in 1983. In 1984, Marshall and Warren reported a coccoid form in older cultures. Since that time, other workers have observed rod and coccal forms in vitro; coccoid forms predominate in cultures 3-7 days old. We sought to examine the growth cycle of H. pylori in prolonged culture and the mode of coccoid body formation.

The Nature of Oxide Surfaces: Topographic and Electronic Structure

1993 ◽  
Vol 51 ◽  
pp. 966-967
Author(s):  
Dawn A. Bonnell ◽  
Yong Liang
Keyword(s):  
Transition Metal Oxides ◽  
Electronic Structures ◽  
Recent Progress ◽  
Spatial Localization ◽  
Level Of Detail ◽  
Scanning Tunneling ◽  
Oxide Surfaces ◽  
Tunneling Microscopy ◽  
Considerable Effort ◽  
Complete Understanding

Recent progress in the application of scanning tunneling microscopy (STM) and tunneling spectroscopy (STS) to oxide surfaces has allowed issues of image formation mechanism and spatial resolution limitations to be addressed. As the STM analyses of oxide surfaces continues, it is becoming clear that the geometric and electronic structures of these surfaces are intrinsically complex. Since STM requires conductivity, the oxides in question are transition metal oxides that accommodate aliovalent dopants or nonstoichiometry to produce mobile carriers. To date, considerable effort has been directed toward probing the structures and reactivities of ZnO polar and nonpolar surfaces, TiO2 (110) and (001) surfaces and the SrTiO3 (001) surface, with a view towards integrating these results with the vast amount of previous surface analysis (LEED and photoemission) to build a more complete understanding of these surfaces. However, the spatial localization of the STM/STS provides a level of detail that leads to conclusions somewhat different from those made earlier.

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