Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title]最新文献

Resonance Raman Spectroscopy Investigation of the Interaction of Molecules Adsorbed on Solid Acid Surfaces 固体酸表面吸附分子相互作用的共振拉曼光谱研究

Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title] Pub Date : 2021-12-03 DOI: 10.5772/intechopen.101223

Lucia Kiyomi Noda

{"title":"Resonance Raman Spectroscopy Investigation of the Interaction of Molecules Adsorbed on Solid Acid Surfaces","authors":"Lucia Kiyomi Noda","doi":"10.5772/intechopen.101223","DOIUrl":"https://doi.org/10.5772/intechopen.101223","url":null,"abstract":"Many solid acids with very strong acid sites, as some zeolites, transition metal exchanged montmorillonites, sulfated metallic oxides, are known to have the oxidizing ability, which can be related to the catalytic activity of these materials. The interaction of these solid acids with aromatic molecules can give rise to several oxidation products. Intermediate species of aromatic molecules formed by interaction with strong solid acids had been reported, as radical cations, proving the oxidizing ability of the solids. Besides radical cations, charge transfer complexes between the solid acids and aromatic molecules can be formed. These radical cations and charge transfer complexes usually show absorption bands in the visible region, opening the possibility of studying these species by Resonance Raman Spectroscopy (RRS). Benzene and substituted benzenes, phenothiazine, t-stilbene, adsorbed on solid acids, are examples of molecules that had been investigated by RRS. Exciting the spectrum with suitable radiation makes it possible to observe the RRS of the species of interest even when its concentration is low, because of the preferential enhancement of the vibrational modes of the chromophore. A review of RRS studies of molecules adsorbed on solid acids is presented. RRS proved valuable in characterizing intermediate species as radical cations or charge transfer complexes formed on the solid acids.","PeriodicalId":176269,"journal":{"name":"Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title]","volume":"16-17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117132691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Raman Spectroscopy for Characterization of Hydrotalcite-like Materials Used in Catalytic Reactions 催化反应中类水滑石材料的拉曼光谱表征

Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title] Pub Date : 2021-11-05 DOI: 10.5772/intechopen.99539

Luciano Honorato Chagas, Sandra Shirley Ximeno Chiaro, Alexandre Amaral Leitão, R. Diniz

引用次数: 0

High-Wavenumber Raman Analysis 高波数拉曼分析

Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title] Pub Date : 2021-10-28 DOI: 10.5772/intechopen.100474

Shan Yang

引用次数: 2

Tip-Enhanced Raman Spectroscopy of 2D Semiconductors 二维半导体的尖端增强拉曼光谱

Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title] Pub Date : 2021-10-06 DOI: 10.5772/intechopen.99817

M. Rahaman, D. Zahn

{"title":"Tip-Enhanced Raman Spectroscopy of 2D Semiconductors","authors":"M. Rahaman, D. Zahn","doi":"10.5772/intechopen.99817","DOIUrl":"https://doi.org/10.5772/intechopen.99817","url":null,"abstract":"Two-dimensional (2D) semiconductors are one of the most extensively studied modern materials showing potentials in large spectrum of applications from electronics/optoelectronics to photocatalysis and CO2 reduction. These materials possess astonishing optical, electronic, and mechanical properties, which are different from their bulk counterparts. Due to strong dielectric screening, local heterogeneities such as edges, grain boundaries, defects, strain, doping, chemical bonding, and molecular orientation dictate their physical properties to a great extent. Therefore, there is a growing demand of probing such heterogeneities and their effects on the physical properties of 2D semiconductors on site in a label-free and non-destructive way. Tip-enhanced Raman spectroscopy (TERS), which combines the merits of both scanning probe microscopy and Raman spectroscopy, has experienced tremendous progress since its introduction in the early 2000s and is capable of local spectroscopic investigation with (sub-) nanometer spatial resolution. Introducing this technique to 2D semiconductors not only enables us to understand the effects of local heterogeneities, it can also provide new insights opening the door for novel quantum mechanical applications. This book chapter sheds light on the recent progress of local spectroscopic investigation and chemical imaging of 2D semiconductors using TERS. It also provides a basic discussion of Raman selection rules of 2D semiconductors important to understand TERS results. Finally, a brief outlook regarding the potential of TERS in the field of 2D semiconductors is provided.","PeriodicalId":176269,"journal":{"name":"Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title]","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133975226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of Raman Spectroscopy in Biomedical Diagnostics 拉曼光谱在生物医学诊断中的应用

Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title] Pub Date : 2021-09-20 DOI: 10.5772/intechopen.99771

N. Mhlanga, Phumlani Tetyana, S. Nyembe, L. Sikhwivhilu

引用次数: 4

Deep Learning Approach for Raman Spectroscopy 拉曼光谱的深度学习方法

Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title] Pub Date : 2021-09-17 DOI: 10.5772/intechopen.99770

M. Jinadasa, A. C. Kahawalage, M. Halstensen, Nils-Olav Skeie, Klaus‐Joachim Jens

{"title":"Deep Learning Approach for Raman Spectroscopy","authors":"M. Jinadasa, A. C. Kahawalage, M. Halstensen, Nils-Olav Skeie, Klaus‐Joachim Jens","doi":"10.5772/intechopen.99770","DOIUrl":"https://doi.org/10.5772/intechopen.99770","url":null,"abstract":"Raman spectroscopy is a widely used technique for organic and inorganic chemical material identification. Throughout the last century, major improvements in lasers, spectrometers, detectors, and holographic optical components have uplifted Raman spectroscopy as an effective device for a variety of different applications including fundamental chemical and material research, medical diagnostics, bio-science, in-situ process monitoring and planetary investigations. Undoubtedly, mathematical data analysis has been playing a vital role to speed up the migration of Raman spectroscopy to explore different applications. It supports researchers to customize spectral interpretation and overcome the limitations of the physical components in the Raman instrument. However, large, and complex datasets, interferences from instrumentation noise and sample properties which mask the true features of samples still make Raman spectroscopy as a challenging tool. Deep learning is a powerful machine learning strategy to build exploratory and predictive models from large raw datasets and has gained more attention in chemical research over recent years. This chapter demonstrates the application of deep learning techniques for Raman signal-extraction, feature-learning and modelling complex relationships as a support to researchers to overcome the challenges in Raman based chemical analysis.","PeriodicalId":176269,"journal":{"name":"Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title]","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133299465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Raman Spectroscopy in the Analysis of Textile Structures 拉曼光谱在纺织品结构分析中的应用

Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title] Pub Date : 2021-09-06 DOI: 10.5772/intechopen.99731

D. Puchowicz, M. Cieślak

引用次数: 11

Raman Spectroscopy and Mapping Analysis of Low-Dimensional Nanostructured Materials and Systems 低维纳米结构材料和系统的拉曼光谱和映射分析

Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title] Pub Date : 2021-09-05 DOI: 10.5772/intechopen.99775

K. Krishnamoorthy, Sang‐Jae Kim

引用次数: 0

Raman Features of Linear-Carbon-Chain and Multiwall Carbon Nanotube Composites 线性碳链和多壁碳纳米管复合材料的拉曼特性

Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title] Pub Date : 2021-08-09 DOI: 10.5772/intechopen.99465

Y. Saito, K. Asaka

{"title":"Raman Features of Linear-Carbon-Chain and Multiwall Carbon Nanotube Composites","authors":"Y. Saito, K. Asaka","doi":"10.5772/intechopen.99465","DOIUrl":"https://doi.org/10.5772/intechopen.99465","url":null,"abstract":"Structural and electronic properties of multiwall carbon nanotubes (MWCNTs) containing linear carbon chains (LCCs), which were produced by arc-discharge between carbon electrodes in an atmospheric pressure, have been studied by Raman spectroscopy as well as electron microscopy. Spectral features of Raman scattering from the LCC/MWCNT composites were reviewed with emphasis on the spectra obtained with a low energy photon (1.58 eV, 785 nm) excitation, which have not been described in detail so far. Characteristic frequencies of LCC stretching modes with the 785 nm laser excitation are observed at around 1740, 1759, and 1789 cm−1. In a low frequency region, radial breathing modes (RBMs) of the innermost tube within MWCNTs are observed at specific frequencies of 293, 341, 402, and 510 cm−1; the highest RBM frequency is tentatively assigned to a tube with the chiral index (4,3), whose diameter is expected to 0.50 nm. LCC bands observed with various excitation wavelengths from 488 to 785 nm show that the band consists of several peaks, and the relative intensities of constituent peaks change with the excitation wavelengths due to the resonance effect; the higher the excitation photon energy is, the higher the intensity of high-frequency LCC modes.","PeriodicalId":176269,"journal":{"name":"Recent Developments in Atomic Force Microscopy and Raman Spectroscopy for Materials Characterization [Working Title]","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129289864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0