A5033255927- Graphene research and applications
- Diamond and Carbon-based Materials Research
- Advanced battery technologies research
- MXene and MAX Phase Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Perovskite Materials and Applications
- Boron and Carbon Nanomaterials Research
- Thermal properties of materials
- High-pressure geophysics and materials
- Advanced Chemical Physics Studies
- 2D Materials and Applications
- Transition Metal Oxide Nanomaterials
- Advancements in Battery Materials
- Advanced Photocatalysis Techniques
- Chalcogenide Semiconductor Thin Films
- Hydrogen Storage and Materials
- Ga2O3 and related materials
- Optical properties and cooling technologies in crystalline materials
- Iron-based superconductors research
- Superconductivity in MgB2 and Alloys
- Radiation Effects in Electronics
- Carbon Nanotubes in Composites
- Advanced ceramic materials synthesis
- Metal and Thin Film Mechanics
Chulalongkorn University
2016-2025
Thailand Center of Excellence in Physics
2019-2023
Carnegie Institution for Science
2019
Geophysical Laboratory
2019
Office of the Higher Education Commission
2016
The uncontrolled dendrite growth and detrimental parasitic reactions of Zn anodes currently impede the large-scale implementation aqueous zinc ion batteries. Here, we design a versatile quasi-solid-state polymer electrolyte with highly selective transport channels via molecular crosslinking sodium polyacrylate, lithium magnesium silicate cellulose nanofiber. abundant negatively charged ionic modulate Zn2+ desolvation process facilitate transport. Moreover, an in-situ formed Zn-Mg-Si...
Aqueous zinc-ion batteries (ZIBs) with cost-effective and safe features are highly competitive in grid energy storage applications, but plagued by the sluggish Zn2+ diffusion kinetics poor cyclability of cathodes. Herein, a one-stone-two-birds strategy La3+ incorporation (La–V2O5) is developed to motivate insertion/extraction stabilize vanadium species for V2O5. Theoretical experimental studies reveal incorporated ions V2O5 can not only serve as pillars expand interlayer distance (11.77 Å)...
Aqueous zinc ion batteries (ZIBs) are emerging as a promising candidate in the post-lithium battery era, while limited choice of cathode materials plagues their further development, especially tunnel-type with high electrochemical performance. Here, vanadium-based compound based on hydrogen vanadium bronze (HxV2O5) microspheres has been fabricated and employed for fast Zn2+ ions' intercalation/deintercalation, which delivers an excellent capacity (425 mAh g-1 at 0.1 A g-1), remarkable...
Diamond-derived two-dimensional (2D) materials or diamanes show promising properties such as high elastic constants and giant thermal conductivity. We here present a new phase of diamane variants, AA-NCCN, which is diamane-like structure two carbon nitride layers in AA-stacking. Its conductivity higher than that AB-NCCN, an AB-stacking configuration NCCN, hydrogenated diamane, computed by the relaxation time approximation (RTA) method. Because RTA underestimates some 2D materials, we propose...
The crucial role played by the organic molecular cation in hybrid organic–inorganic perovskite has been a challenging subject of discussion. Effects on cubic structure formamidinium lead iodide (FAPI) were investigated deploying state-of-the-art density functional theory including spin–orbit coupling (SOC). Equipped with Euler's rotations, energy landscapes corresponding to different orientations (FA) calculated. From landscapes, flipping barriers are interpreted be thermal agitations...
Effects of electronic nonlocality in density functional theory study structural and energetic properties a pseudocubic CH3NH3PbI3 are investigated by considering coherent rotation around C-N axis CH3NH3 cation. A number truly non-local semi-local exchange correlation functionals examined comparing calculated parameters with experimental results. The vdW-DF-cx which takes into account the van der Waals consistent shows best overall performance for this system. Remarkable distinctions between...
One type of two-dimensional diamonds that are derived from [111] direction, so-called diamane, has been previously shown to be stabilized by N-substitution, where the passivation dangling bonds is no longer needed. In present work, we theoretically demonstrated another [110] direction exhibiting a washboard conformation can also N-substitution. Three structural models washboard-like carbon nitrides with compositions C6N2, C5N3, and C4N4 studied together fully hydrogenated diamane (C8H4). The...
Abstract Thermodynamic stability as well structural, electronic, and elastic properties of boron-deficient AlB 2 -type tantalum diborides, which is designated <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>α</mml:mi> <mml:mo>−</mml:mo> </mml:math> TaB <mml:msub> <mml:mi/> <mml:mrow> <mml:mn>2</mml:mn> <mml:mi>x</mml:mi> </mml:mrow> </mml:msub> , due to the presence vacancies at its boron sublattice are studied via first-principles calculations. The...
Hydrogen and helium are the most abundant elements in universe, they constitute interiors of gas giant planets. Thus, their equations states, phase, chemical state, reactivity at extreme conditions great interest. Applying Raman spectroscopy, visual observation, synchrotron X-ray diffraction diamond anvil cells, we performed experiments on H2–He 1:1 D2–He 1:10 compressed mixtures up to 100 GPa 300 K. By comparing with available data pure bulk materials, find no sign miscibility, reactivity,...
Effect of spin–orbit coupling on mixing thermodynamics and electronic bandgap ordered ground-state (GS) disordered (SQS) 2H-Mo<sub>1−x</sub>W<sub>x</sub>S<sub>2</sub> solid solutions.
Abstract We use the first principle calculation to investigate intrinsic magnetism of graphitic carbon nitrides (GCNs). By preserving three-fold symmetry, GCN building blocks have been built out different combinations between 6 components which are C atom, N s-triazine, heptazine, heptazine with atom at center, and benzimidazole-like component. That results in 20 phases where 11 previously reported, 9 newly derived. The partial density states charge analyzed through understand origin...
Abstract 2D materials have been in the spotlight due to their impressive properties since graphene was successfully synthesized. A single-layered diamond or diamane, which has high thermal conductivity and stiffness inherited from its bulk counterpart, is a candidate for heat dissipating applications nanodevices. Unfortunately, non-passivated dangling bonds on surface of pristine diamane can cause structural instability. Recent theoretical studies suggested that site-specific substitution N...
Abstract High-quality VO $$_2$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mrow /> <mml:mn>2</mml:mn> </mml:msub> </mml:math> films were fabricated on top of c -Al O $$_3$$ <mml:mn>3</mml:mn> substrates using Reactive Bias Target Ion Beam Deposition (RBTIBD) and the studies graphene/VO heterostructure conducted. Graphene layers placed $$\sim$$ <mml:mo>∼</mml:mo> 50 100 nm . The graphene introduced mechanical exfoliate CVD wet-transfer method to prevent...