scholarly journals The role of nitrogen doping in ALD Ta2O5 and its influence on multilevel cell switching in RRAM

2017 ◽  
Vol 110 (10) ◽  
pp. 102902 ◽  
Author(s):  
N. Sedghi ◽  
H. Li ◽  
I. F. Brunell ◽  
K. Dawson ◽  
R. J. Potter ◽  
...  
Keyword(s):  
Nitrogen Doping ◽  
Cell Switching

scholarly journals Role of Nitrogen Doping on the Performance of Carbon Nanotube Catalysts: A Catalytic Wet Peroxide Oxidation Application

ChemCatChem ◽  
2016 ◽  
Vol 8 (12) ◽  
pp. 2068-2078 ◽  
Author(s):  
Maria Martin-Martinez ◽  
Rui S. Ribeiro ◽  
Bruno F. Machado ◽  
Philippe Serp ◽  
Sergio Morales-Torres ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Nitrogen Doping ◽  
Peroxide Oxidation ◽  
Wet Peroxide Oxidation ◽  
Catalytic Wet Peroxide Oxidation

The Influence of Nitrogen Doping on the Chemical and Local Bonding Environment of Amorphous and Crystalline Ge2Sb2Te5

2009 ◽  
Vol 1160 ◽  
Author(s):  
Joseph Washington ◽  
Eric A. Joseph ◽  
Michael A. Paesler ◽  
Gerald Lucovsky ◽  
Jean L. Jordan-Sweet ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Flash Memory ◽  
Nitrogen Doping ◽  
Phase Change Materials ◽  
Annealed Film ◽  
Nand Flash ◽  
Nand Flash Memory ◽  
Local Bonding ◽  
Memory Applications

AbstractRecent interest in phase change materials (PCMs) for non-volatile memory applications has been fueled by the promise of scalability beyond the limit of conventional DRAM and NAND flash memory [1]. However, for such solid state device applications, Ge2Sb2Te5 (GST), GeSb, and other chalcogenide PCMs require doping. Doping favorably modifies crystallization speed, crystallization temperature, and thermal stability but the chemical role of the dopant is not yet fully understood. In this work, X-ray Absorption Fine Spectroscopy (XAFS) is used to examine the chemical and structural role of nitrogen doping (N-) in as-deposited and crystalline GST thin films. The study focuses on the chemical and local bonding environment around each of the elements in the sample, in pre and post-anneal states, and at various doping concentrations. We conclude that the nitrogen dopant forms stable Ge-N bonds as deposited, which is distinct from GST bonds, and remain at the grain boundary of the crystallites such that the annealed film is comprised of crystallites with a dopant rich grain boundary.

EFFECT OF NITROGEN VARIATION ON THE SYNTHESIS OF VERTICALLY ALIGNED BAMBOO-SHAPED C–N NANOTUBES USING SUNFLOWER OIL

2011 ◽  
Vol 10 (04n05) ◽  
pp. 809-813 ◽  
Author(s):  
RAJESH KUMAR ◽  
RAM MANOHAR YADAV ◽  
KALPANA AWASTHI ◽  
R. S. TIWARI ◽  
O. N. SRIVASTAVA
Keyword(s):  
Electron Microscopy ◽  
Sunflower Oil ◽  
Nitrogen Doping ◽  
Nitrogen Concentration ◽  
Structural Features ◽  
Transmission Electron ◽  
Carbon Framework ◽  
Oil Mixtures ◽  
Vertically Aligned

To examine the role of NH3 on bundles of aligned bamboo-shaped carbon–nitrogen (C–N) nanotube were synthesized the pyrolysis of ferrocene (Fe(C5H5)2) and sunflower oil mixtures with NH3 being the source of nitrogen. The concentration of NH3 was varying in volume (vol). Optimized temperature and concentration of ferrocene were 825°C and 10 mg/ml, respectively. With the increase of nitrogen concentration the bundles are breaking in nearly equal parts. With nitrogen doping, the nanotubes have a bamboo-like structure and reveal degraded crystallinity of graphitic sheets. Nitrogen plays key role in generating equal compartments inside the carbon nanotube. The nanotubes were characterized by scanning electron microscopy and transmission electron microscopy that reveal the vertically aligned and hollow structural features of the nanotubes. FTIR shows the incorporation of N atom inside carbon framework and Raman spectrum indicates the enhancement of the defects inside C–N nanotube due to the N atom in C–N nanotube.

Carbonization conditions influence the emission characteristics and the stability against photobleaching of nitrogen doped carbon dots

Nanoscale ◽  
2017 ◽  
Vol 9 (32) ◽  
pp. 11730-11738 ◽  
Author(s):  
Yuan Xiong ◽  
Julian Schneider ◽  
Claas J. Reckmeier ◽  
He Huang ◽  
Peter Kasák ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Nitrogen Doping ◽  
Luminescence Properties ◽  
Emission Characteristics ◽  
Nitrogen Doped ◽  
The Stability ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

Our study provides insights into the origin of the luminescence properties of carbon dots, by addressing the role of carbonization conditions, nitrogen doping, and formation of molecular fluorophores.

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