Optical properties and structural phase transitions of W-doped VO<sub>2</sub>(R) under pressure

Zhang, Huafang; Guan, Zhou; Cheng, Benyuan; Li, Quanjun; Liu, Ran; Zhang, Jing; Liu, Zhenxian; Yang, Ke; Cui, Tian; Liu, Bingbing

doi:10.1039/c7ra04605g

Cited by 12 publications

(15 citation statements)

References 54 publications

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“…Zhang et al reported that UFCB‐induced inhibition of CAT activity can be partially attributed to structural changes. UFCB can further affect the activity of CAT by binding to the active center of CAT . The structure of the CAT enzyme in hRBCs was disrupted, resulting in its activity being affected.…”

Section: Resultsmentioning

confidence: 99%

Hematological effects of ultrafine carbon black on red blood cells and hemoglobin

Pan

Zhang

et al. 2019

J Biochem & Molecular Tox

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The harmful effects of ultrafine particles (UFPs) in the atmosphere have caused widespread concern. Ultrafine carbon black (UFCB) is an important component of UFPs. In this study, we explored the impact of UFCB on the structure, the antioxidant defense system, and the ATPase activity of human red blood cells (hRBCs). It was found that UFCB decreased the activity of SOD (73.58%), CAT (89.79%), and GSH‐Px (81.02%), leading to oxidative stress in hRBCs. UFCB had no destructive effect on the structure of hRBCs in 4 hours. ATPase activity increased (119.34%) and UFCB had weakly stimulated the cell membrane. On the molecular level, spectroscopic experiments showed that bovine hemoglobin (BHb) can bind to the UFCB by electrostatic force, leading to the shrinking of the BHb skeleton and increase in microenvironment polarity. This study demonstrates the negative hematological effect of UFCB on hemoglobin and hRBCs and reveals the potential risks in animals and humans.

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Section: Resultsmentioning

confidence: 99%

Hematological effects of ultrafine carbon black on red blood cells and hemoglobin

Pan

Zhang

et al. 2019

J Biochem & Molecular Tox

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“…7, peak (a) and peak (b) are the Rayleigh scattering peak (l em ¼ l ex ) and the secondary-order scattering peak (l em ¼ 2l ex ), respectively. 32 Both the two peaks decreased aer the addition of ARS, indicating that the hydration radius decreased under the exposure of ARS. This result is corresponding to what could be learned from RLS spectra.…”

Section: Effects Of Ars On Secondary Structures Of Catmentioning

confidence: 98%

“…It could be inferred from the gure that ARS slightly unfolded the backbone of ARS, in accordance with the quench of the two peaks. 32 Micro-environment and conformation of CAT was changed, which conrmed the result of synchronous uorescence spectra.…”

Section: Effects Of Ars On Secondary Structures Of Catmentioning

confidence: 99%

“…The framework conformation of CAT is therefore slightly changed by ARS. 28,31,32 The peak 2 at 280 nm is the characteristic peak of aromatic amino acids residues, which reects the micro-environment on Trp, Tyr and Phe residues. 20,28 There was a slight increment of absorption while no signicant peak-shi could be observed in the peak 2 from Fig.…”

Section: Structural and Conformational Changes Of Cat Induced By Arsmentioning

confidence: 99%

“…Peak (1) reects the characteristic of n / p* transition of amino acid residues and polypeptide backbone in CAT, while peak (2) is for the characteristic of p / p* transition of amino acid residues. 32 The peak (1) mainly reects the amino acid residues. It could be inferred from the gure that ARS slightly unfolded the backbone of ARS, in accordance with the quench of the two peaks.…”

Section: Effects Of Ars On Secondary Structures Of Catmentioning

confidence: 99%

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The toxic effects of alizarin red S on catalase at the molecular level

Yuan

Liu

et al. 2019

RSC Adv.

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Alizarin red S (ARS) is a widespread mordant dye derived from alizarin. However, it was reported to be mutagenic and carcinogenic probably because it could induce oxidative damages in organisms. Catalase (CAT) is an important antioxidant enzyme defensing oxidative damages induced by xenobiotics. The underlying mechanisms of ARS interacting with CAT have not been clarified yet. This study is conducted to characterize the functional and conformational changes on CAT by ARS and the binding details to further investigate their interaction mechanisms. Under exposure of ARS at 5 mM, CAT activity was significantly decreased to 76.2%. Inhibition of CAT probably resulted in promotion of intracellular oxidative stress and pro-oxidant property of ARS. The interaction between ARS and CAT was proved to be spontaneous and exothermic. However, limited structural changes were observed according to spectroscopic results. Results showed that ARS prefers to bind with residues buried in the active site and could alter the activity of CAT, which were agree with the molecular docking results. This work proves the adverse effects of ARS on CAT mainly at molecular level and further highlights its potential risks to heath. † Electronic supplementary information (ESI) available: ARS structure, UV-Vis spectrum of 10 mM ARS, absorption change of hydrogen peroxide along with time, circular dichroism spectra of CAT-ARS system, inner-lter effect of CAT-ARS system, interaction between ARS and the amino acid residues in different binding sites of CAT, interaction between ARS and CAT where His 74 was mutated, binding parameters before and aer mutating His 74. See

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Defect‐Driven Light Perception and Memristor Storage with Phase Transition in Vanadium Dioxide

Niu,

Xu,

Huang

et al. 2024

Adv Elect Materials

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Tunable optical information storage is crucial in artificial retinal systems for mimicking neurobiological visual characteristics. The perception and storage of light signals rely heavily on the regulation of the conductivity states of memristor materials (e.g., transition metal oxides). Controlling light memristor behavior via defects and polymorphic phases remains underexplored and differs from traditional plasticity training via repeated testing. In this study, defect‐driven ultraviolet light perception and memristor storage with phase transitions in vanadium dioxide (VO2) thin films are presented. The effects of oxygen defects and the corresponding polymorphic phases on ultraviolet light memristors are investigated. The dependence of phonon vibrations and insulator–metal transition behavior on defect levels are revealed. Self‐doping and polymorphs enable VO2 to exhibit distinct ultraviolet memristor performance. It is anticipated that defect‐driven light memristors significantly contribute to the realization of artificial synaptic devices and the implementation of advanced electronic neuron systems.

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Optical properties and structural phase transitions of W-doped VO₂(R) under pressure

Abstract: The structure transition sequence of W–VO2(R) nanoparticles follows rutile (R) → orthorhombic (CaCl2-type) → monoclinic (Mx) within metallic phases.

Cited by 12 publications

References 54 publications

Hematological effects of ultrafine carbon black on red blood cells and hemoglobin

Hematological effects of ultrafine carbon black on red blood cells and hemoglobin

The toxic effects of alizarin red S on catalase at the molecular level

Defect‐Driven Light Perception and Memristor Storage with Phase Transition in Vanadium Dioxide

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Optical properties and structural phase transitions of W-doped VO2(R) under pressure

Abstract: The structure transition sequence of W–VO2(R) nanoparticles follows rutile (R) → orthorhombic (CaCl2-type) → monoclinic (Mx) within metallic phases.

Cited by 12 publications

References 54 publications

Hematological effects of ultrafine carbon black on red blood cells and hemoglobin

Hematological effects of ultrafine carbon black on red blood cells and hemoglobin

The toxic effects of alizarin red S on catalase at the molecular level

Defect‐Driven Light Perception and Memristor Storage with Phase Transition in Vanadium Dioxide

Contact Info

Product

Resources

About

Optical properties and structural phase transitions of W-doped VO₂(R) under pressure