Unveiling bonding states and roles of edges in nitrogen-doped graphene nanoribbon by X-ray photoelectron spectroscopy

Y Yamada, H Tanaka, S Kubo, S Sato - Carbon, 2021 - Elsevier
X-ray photoelectron spectroscopy (XPS) is among the most utilized analytical methods for
nitrogen-doped carbon materials. Clarifying the assignments of nitrogen-doped carbon …

Carbonization mechanisms of polyimide: Methodology to analyze carbon materials with nitrogen, oxygen, pentagons, and heptagons

T Kato, Y Yamada, Y Nishikawa, H Ishikawa, S Sato - Carbon, 2021 - Elsevier
Carbonization process of pyromellitic dianhydride (PMDA)-4, 4′-diaminodiphenyl ether
(ODA)-type polyimide has been studied for decades. However, various reaction …

Origins of sp3C peaks in C1s X-ray Photoelectron Spectra of Carbon Materials

A Fujimoto, Y Yamada, M Koinuma, S Sato - Analytical chemistry, 2016 - ACS Publications
X-ray photoelectron spectroscopy (XPS) is among the most powerful techniques to analyze
defective structures of carbon materials such as graphene and activated carbon. However …

Origins of peaks of graphitic and pyrrolic nitrogen in N1s X-ray photoelectron spectra of carbon materials: quaternary nitrogen, tertiary amine, or secondary amine?

T Kato, Y Yamada, Y Nishikawa, T Otomo… - Journal of Materials …, 2021 - Springer
X-ray photoelectron spectroscopy (XPS) is among the most powerful techniques to analyse
structures of nitrogen-doped carbon materials. However, reported assignments of (1) …

A comparative study on defect estimation using XPS and Raman spectroscopy in few layer nanographitic structures

K Ganesan, S Ghosh, NG Krishna, S Ilango… - Physical Chemistry …, 2016 - pubs.rsc.org
Defects in planar and vertically oriented nanographitic structures (NGSs) synthesized by
plasma enhanced chemical vapor deposition (PECVD) have been investigated using …

Distinguishing zigzag and armchair edges on graphene nanoribbons by X-ray photoelectron and Raman spectroscopies

J Kim, N Lee, YH Min, S Noh, NK Kim, S Jung… - ACS …, 2018 - ACS Publications
Graphene nanoribbons (GNRs) have recently emerged as alternative 2D semiconductors
owing to their fascinating electronic properties that include tunable band gaps and high …

Analyses of oxidation process for isotropic pitch-based carbon fibers using model compounds

T Senda, Y Yamada, M Morimoto, N Nono, T Sogabe… - Carbon, 2019 - Elsevier
Isotropic pitch-based carbon fiber has been utilized for various applications such as thermal
insulation materials for high-temperature furnace and additives for slide member, but the …

Carbon materials with high pentagon density

N Diana, Y Yamada, S Gohda, H Ono, S Kubo… - Journal of Materials …, 2021 - Springer
Pentagons in carbon materials have attracted attentions because of the potential high
chemical reactivity, band gap control, and electrochemical activity. However, it is challenging …

Synthesis of ordered carbonaceous frameworks from organic crystals

H Nishihara, T Hirota, K Matsuura, M Ohwada… - Nature …, 2017 - nature.com
Despite recent advances in the carbonization of organic crystalline solids like metal-organic
frameworks or supramolecular frameworks, it has been challenging to convert crystalline …

Toward strategical bottom-up synthesis of carbon materials with exceptionally high basal-nitrogen content: development of screening techniques

Y Yamada, H Sato, S Gohda, T Taguchi, S Sato - Carbon, 2023 - Elsevier
Selective doping of nitrogen-containing functional groups in the basal plane of carbon
materials is the most promising technique for enhancing performances and stability …