Resolving nanoscopic structuring and interfacial THz dynamics in setting cements

Song, Fu; Yang, Bin; Tommaso, Devis Di; Donnan, Robert; Chass, Gregory A.; Yada, Rickey Y.; Farrar, David H.; Tian, Kun

doi:10.1039/d1ma01002f

Cited by 19 publications

(20 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous scientific studies have shown that the antibacterial activity of calcium silicate ceramics, including bredigite, is due to the exchange of alkali ions with protons from the aqueous medium, and hydroxyl ions due to their inhibitory and antibacterial properties [ 33 ]. It has also been found that the antibacterial property of bredigite has an inverse relationship with the particle size, because smaller particles are more likely to release calcium ions, which leads to an increase in the pH value [ 34 ]. In other words, two factors can increase pH in the presence of bredigite ceramics: Ca ion concentration, and particle size.…”

Section: Resultsmentioning

confidence: 99%

Bredigite-CNTs Reinforced Mg-Zn Bio-Composites to Enhance the Mechanical and Biological Properties for Biomedical Applications

et al. 2023

View full text Add to dashboard Cite

Magnesium (Mg) and its compounds have been investigated as biodegradable metals for bone implants. However, high corrosion rates and low bioactivity that cause loss of mechanical properties are factors that have limited their biomedical applications. The purpose of this work is to remedy the weaknesses of the Mg–Zn (MZ) alloy matrix. For this purpose, we have synthesized Mg-based composites with different concentrations of bredigite (Br; Ca7MgSi4O16)–carbon nanotubes (CNTs) using mechanical alloying and semi-powder metallurgy processes with spark plasma sintering. Then, we studied the effect of the simultaneous addition of Br-CNTs on in vitro degradation, as well as its effect on the composites’ mechanical and antibacterial properties. Increases of 57% and 72% respectively were observed in the microhardness and compressive strength of the MZ/Br-CNTs composite in comparison to the MZ alloy. In addition, the rate of degradation of Mg-based composites in simulated body fluids (SBF) was almost 2 times lower. An assessment of antibacterial behavior disclosed that the simultaneous adding of Br-CNTs to Mg can meaningfully prevent the growth and invasion of E. coli and S. aureus. These research findings demonstrate the potential application of MZ/Br-CNTs composites to implants and the treatment of bone infections.

show abstract

Section: Resultsmentioning

confidence: 99%

Bredigite-CNTs Reinforced Mg-Zn Bio-Composites to Enhance the Mechanical and Biological Properties for Biomedical Applications

et al. 2023

View full text Add to dashboard Cite

show abstract

“…THz‐TDS most often operates in the ≈0.1–10 THz frequency range (10 11 – 10 13 Hz ≈ 0.41–41 meV) and provides contact‐free, non‐destructive characterization through measurable frequency‐resolved attenuation of the reflected/transmitted THz field following its interaction with a sample. [ 295 ] The measured time‐resolved THz signals can be converted to battery‐related parameters depending on the experimental setup. For example, THz‐TDS can help resolve aspects of the ionic conduction mechanism [ 247 ] as well as SEI formation and evolution [ 248 ] in response to external stimuli, such as the applied voltage or current and their time duration in LIBs.…”

Section: Discussionmentioning

confidence: 99%

Lithium Batteries and the Solid Electrolyte Interphase (SEI)—Progress and Outlook

Adenusi

Chass

Passerini

et al. 2023

Advanced Energy Materials

Self Cite

262

113

View full text Add to dashboard Cite

those being implemented in solving global challenges remain accompanied by an energy reliance on non-renewable fossil fuels. The accelerated depletion of stocks of these energy sources, together with their associated pollution drives the need to expedite establishment of robust renewable alternatives. Often termed "renewables" or "clean energy," these power sources have a perennial temporalavailability and thus have greater need for energy repositories than non-renewables. Hence, prompt optimization of energy storage-delivery devices is crucial to the sustainable development, scaling, commercial delivery, and global establishment of reliable clean energy. [1,2] Batteries and electrochemical devices have most often filled the majority of power-storage and are ubiquitous as energy mediation devices, capable of harnessing large amount of energy for various applications including the aerospace, travel and transport, and electronics industries, among others. [3][4][5][6] The future of batteries lies with devices produced from ever-more sustainable components that can offer improved safety, transportability, extended battery life, have short recharge times as well as low production costs and Interfacial dynamics within chemical systems such as electron and ion transport processes have relevance in the rational optimization of electrochemical energy storage materials and devices. Evolving the understanding of fundamental electrochemistry at interfaces would also help in the understanding of relevant phenomena in biological, microbial, pharmaceutical, electronic, and photonic systems. In lithium-ion batteries, the electrochemical instability of the electrolyte and its ensuing reactive decomposition proceeds at the anode surface within the Helmholtz double layer resulting in a buildup of the reductive products, forming the solid electrolyte interphase (SEI). This review summarizes relevant aspects of the SEI including formation, composition, dynamic structure, and reaction mechanisms, focusing primarily on the graphite anode with insights into the lithium metal anode. Furthermore, the influence of the electrolyte and electrode materials on SEI structure and properties is discussed. An update is also presented on state-of-theart approaches to quantitatively characterize the structure and changing properties of the SEI. Lastly, a framework evaluating the standing problems and future research directions including feasible computational, machine learning, and experimental approaches are outlined.

show abstract

“…coherent-THz spectroscopy). 16,17 Initial plans were to achieve this for neutron Compton scattering (NCS) measurements on the Vesuvio beamline at RAL-ISIS as well as for quasi elastic neutron scattering (QENS) on the Osiris/Iris beamlines at RAL-ISIS. These would provide information about changing atomic momentum distributions and the translational/diffusion and rotational dynamics, respectively.…”

Section: A Original Purpose and Dimensionsmentioning

confidence: 99%

CO2-mineralization and carbonation reactor rig: design and validation for in situ neutron scattering experiments - Engineering and Lessons Learned

Mortazavi

Song

Dudman

et al. 2022

Preprint

View full text Add to dashboard Cite

CO2 mineralization via aqueous Mg/Ca/Na-carbonate (MgCO3/CaCO3/Na2CO3) formation represents a huge opportunity for the utilization of captured CO2. However, large-scale mineralization is hindered by slow kinetics due to the highly hydrated character of the cations in aqueous solutions (Mg2+ in particular). Reaction conditions can be optimized to accelerate carbonation kinetics, for example by the inclusion of selected additives that promote competitive dehydration of Mg and subsequent agglomeration, nucleation and crystallization. Towards tracking mineralisation and these steps of the reaction, neutron scattering presents unprecedented advantages over traditional techniques for time-resolved in situ measurements. However, a setup providing continuous solution circulation to ensure reactant system homogeneity for industrially relevant CO2-mineralizsation was currently available for use on neutron beamlines. We therefore undertook the design, construction, testing and implementation of such a self-contained reactor rig for use on selected neutron beamlines at the ISIS Neutron and Muon Source (Chilton, UK). The design ensured robust attachment via suspension from the covering flange to stabilize the reactor assembly and all fittings, as well as facilitating precise alignment of the entire reactor and sample (test) cell with respect to beam dimension and direction. The assembly successfully accomplished the principal tasks of providing a continuous flow of the reaction mixture for homogeneity, quantitative control of CO2 flux into the mixture as well as temperature and pressure regulation throughout the reaction and measurements. The design is discussed, with emphasis placed on the reactor including its geometry, components and all technical specifications. Descriptions of the offbeamline bench tests, safety and functionality, as well as the installation on beamlines and trial experimental procedure are provided, together with representative raw neutron scattering results.

show abstract

Resolving nanoscopic structuring and interfacial THz dynamics in setting cements

Abstract: The setting dynamics of two commercial cements have been tracked over >24 hours of setting with non-destructive THz spectroscopy and neutron scattering. Two established glass ionomer cements (GICs) were measured,...

Cited by 19 publications

References 55 publications

Bredigite-CNTs Reinforced Mg-Zn Bio-Composites to Enhance the Mechanical and Biological Properties for Biomedical Applications

Bredigite-CNTs Reinforced Mg-Zn Bio-Composites to Enhance the Mechanical and Biological Properties for Biomedical Applications

Lithium Batteries and the Solid Electrolyte Interphase (SEI)—Progress and Outlook

CO2-mineralization and carbonation reactor rig: design and validation for in situ neutron scattering experiments - Engineering and Lessons Learned

Contact Info

Product

Resources

About