Spectral partition correlation based on Voigt function for Raman spectral library search

Zhang, Ruoqiu; Shang, Zhaocong; Lu, Sisi; Jia, Nan; Jiang, Xin Jia; Pu, Zhengyu; Du, Yukou; Hu, Yun

doi:10.1016/j.chemolab.2021.104353

Cited by 3 publications

(2 citation statements)

References 26 publications

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“…High-pressure Raman spectroscopy was studied under a pressure of 30.4 GPa and fitted using the Voigt function. 43 Standard pyrochlore has six Raman vibration modes, which are A 1g + E g + 4F 2g . When Bi and O′ are located at low symmetry positions, the Raman vibration modes increase to 17, which become 3A 1g + 5E g + 9F 2g .…”

Section: Resultsmentioning

confidence: 99%

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Pressure-Induced Suppression of Static Disorder and Lattice Distortion in Pyrochlore Bi₂Ru₂O₇

Gai,

Qu,

Zhang

et al. 2024

J. Phys. Chem. C

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Bi 2 Ru 2 O 7 is a weak metal pyrochlore with static disorder from lone-pair electrons. The suppression of static disorder can be observed by in situ Raman spectroscopy, and the abnormal turning point in resistivity can be found at high pressure. X-ray photoelectron spectroscopy (XPS) of bismuth and ruthenium, low-temperature magnetic susceptibility, and magnetization curve were studied, indicating that there were different valence states between bismuth and ruthenium. The in situ highpressure structure evolution and conductivity in Bi 2 Ru 2 O 7 were investigated up to 30.4 and 32.7 GPa, respectively. The electronic structure evolution was studied by first-principles calculations up to 30.0 GPa. Some of the Raman peaks related to static disorder were suppressed at around 2.5 and 18.0 GPa, respectively. The [RuO 6 ] octahedron was compressed and distorted with pressure, and the triangular distortion increased in the range of 18.0 and 24.4 GPa. The high-pressure resistivity was measured by the four probe method. It slowly decreased at first and then increased slowly after 2.5 GPa due to the effects of static disorder and the applying pressure. After 18.0 GPa, the resistivity increased rapidly because of the pressure-induced lattice distortion, which led to the weakening of the conductivity of the sample under high pressure. All observations showed that the lattice distortion was influenced by the combined effects of static disorder and pressure before 18.0 GPa, which caused the resistivity to decrease first and then increase. As static disorder is suppressed, Bi 2 Ru 2 O 7 is close to standard pyrochlore and the conductivity after 18.0 GPa, which is consistent with the theoretical calculation results of band gap.

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Section: Resultsmentioning

confidence: 99%

“…In this work, Raman spectroscopy has been found to be more advantageous than standard pyrochlore in detecting Bi and O′. High-pressure Raman spectroscopy was studied under a pressure of 30.4 GPa and fitted using the Voigt function . Standard pyrochlore has six Raman vibration modes, which are A 1g + E g + 4F 2g .…”

Section: Resultsmentioning

confidence: 99%

Pressure-Induced Suppression of Static Disorder and Lattice Distortion in Pyrochlore Bi₂Ru₂O₇

Gai,

Qu,

Zhang

et al. 2024

J. Phys. Chem. C

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Acquisition methods for ultraviolet atmospheric transmittance at astronomical sites

Ceng¹,

Lu²,

Bao-zhou³

2022

Sci. Sin.-Phys. Mech. Astron.

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Multiplexed molecular imaging identifies pancreatic cancer candidates for epigenetic modulators

Szymonski,

Janiszewska,

Sofińska

et al. 2024

Preprint

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Genomic alterations drive the tumorigenesis of pancreatic cancer (PC). However, alone they do not explain its numerous phenotypes. Exploring the epigenetic landscapes of PC delivers a more insightful picture and might reveal excellent targeted therapies that could improve patient survival. PC subtyping based on histological features reflects its morphological diversity and correlates with clinical outcomes. Here we used a label-free multiplexed molecular imaging to recognize PC epigenetic modifications spatially, consequently, DNA and histone methylation (at lysine and arginine) and histone acetylation (at lysine) were investigated. To complete the picture, B-to-Z-DNA conformational change was assessed. We utilized convolutional neural networks and other machine learning approaches to analyze and semi-quantify the relative variability of epigenome among the six most common PC histological subtypes. We found foamy-glands (FG) and squamous-differentiated (SD) presenting oppositely to others and more alike the benign controls. They consistently expressed higher global levels of epigenetic modifications and higher Z-DNA ratios. Overall, our results suggest variable efficacy of targeting epigenetic regulators in histologically distinct PC subtypes.

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Spectral partition correlation based on Voigt function for Raman spectral library search

Cited by 3 publications

References 26 publications

Pressure-Induced Suppression of Static Disorder and Lattice Distortion in Pyrochlore Bi₂Ru₂O₇

Pressure-Induced Suppression of Static Disorder and Lattice Distortion in Pyrochlore Bi₂Ru₂O₇

Acquisition methods for ultraviolet atmospheric transmittance at astronomical sites

Multiplexed molecular imaging identifies pancreatic cancer candidates for epigenetic modulators

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Spectral partition correlation based on Voigt function for Raman spectral library search

Cited by 3 publications

References 26 publications

Pressure-Induced Suppression of Static Disorder and Lattice Distortion in Pyrochlore Bi2Ru2O7

Pressure-Induced Suppression of Static Disorder and Lattice Distortion in Pyrochlore Bi2Ru2O7

Acquisition methods for ultraviolet atmospheric transmittance at astronomical sites

Multiplexed molecular imaging identifies pancreatic cancer candidates for epigenetic modulators

Contact Info

Product

Resources

About

Pressure-Induced Suppression of Static Disorder and Lattice Distortion in Pyrochlore Bi₂Ru₂O₇

Pressure-Induced Suppression of Static Disorder and Lattice Distortion in Pyrochlore Bi₂Ru₂O₇