A5100453685- Carbon Nanotubes in Composites
- Graphene research and applications
- Boron and Carbon Nanomaterials Research
- MXene and MAX Phase Materials
- Advanced NMR Techniques and Applications
- Supramolecular Chemistry and Complexes
- 2D Materials and Applications
- Synthesis and Properties of Aromatic Compounds
- Diamond and Carbon-based Materials Research
- Parallel Computing and Optimization Techniques
- Fullerene Chemistry and Applications
- Distributed and Parallel Computing Systems
- Cloud Computing and Resource Management
- Luminescence and Fluorescent Materials
- Supramolecular Self-Assembly in Materials
- Organoboron and organosilicon chemistry
- nanoparticles nucleation surface interactions
- Advanced Thermoelectric Materials and Devices
- Advanced Sensor and Energy Harvesting Materials
- Inorganic Fluorides and Related Compounds
- Molecular spectroscopy and chirality
- Molecular Sensors and Ion Detection
- Silicone and Siloxane Chemistry
- Analytical Chemistry and Chromatography
- Advanced Photocatalysis Techniques
Pennsylvania State University
2007-2024
Jiangnan University
2024
Collaborative Innovation Center of Advanced Microstructures
2023
Nanjing University
2023
Peking University
2017-2023
Beijing University of Chemical Technology
2023
Zhengzhou Institute of Machinery
2022
Shandong University
2022
Tiangong University
2021
Park University
2020
One of the major challenges associated with fuel cells is exploring highly efficient and low-cost electrocatalysts for oxygen reduction reaction (ORR). Herein, feasibility using Ti3C2 MXene nanoparticles (NPs) to enhance electrocatalytic activity g-C3N4 ORR was investigated. By varying content NPs, a series g-C3N4/Ti3C2 heterostructures were obtained, displaying enhanced activity, including positive shift in both onset peak potentials toward ORR, compared original basic solution. We...
Synthesis of well-ordered reduced dimensional carbon solids with extended bonding remains a challenge. For example, few single-crystal organic monomers react under topochemical control to produce solids. We report mechanochemical synthesis in which slow compression at room temperature uniaxial stress can convert polycrystalline or benzene monomer into single-crystalline packings nanothreads, one-dimensional sp3 nanomaterial. The long-range order over hundreds microns these crystals allows...
Carbon nanothreads are a new one-dimensional sp3 carbon nanomaterial. They assemble into hexagonal crystals in room temperature, nontopochemical solid-state reaction induced by slow compression of benzene to 23 GPa. Here we show that pyridine also reacts under form well-ordered product: C5NH5 nitride nanothreads. Solid has different crystal structure from solid benzene, so the formation low-dimensional crystalline solids small aromatics may be general phenomenon enables chemical design...
Over the last decades, bone tissue engineering has increasingly become a research focus in field of biomedical engineering, which biomaterials play an important role because they can provide both biomechanical support and osteogenic microenvironment process regeneration. Among these biomaterials, two-dimensional (2D) nanomaterials have recently attracted considerable interest owing to their fantastic physicochemical biological properties including great biocompatibility, excellent...
Carbon nanothreads are a new type of one-dimensional sp3-carbon nanomaterial formed by slow compression and decompression benzene. We report characterization the chemical structure 13C-enriched advanced quantitative, selective, two-dimensional solid-state nuclear magnetic resonance (NMR) experiments complemented infrared (IR) spectroscopy. The width NMR spectral peaks suggests that nanothread reaction products much more organized than amorphous carbon. In addition, there is no evidence from...
Carbon nanothreads, which are one-dimensional sp3-rich polymers, combine high tensile strength with flexibility owing to subnanometer widths and diamond-like cores. These extended carbon solids constructed through pressure-induced polymerization of sp2 molecules such as benzene. Whereas a few examples nanothreads have been reported, the need for onset pressures (≥17 GPa) synthesize them precludes scalability limits scope. Herein, we report scalable synthesis based on molecular furan, can be...
Nanothreads are one-dimensional sp3 hydrocarbons that pack within pseudohexagonal crystalline lattices. They believed to lack long-range order along the thread axis and also interthread registry. Here we investigate phase behavior of thiophene up 35 GPa establish a pressure-induced transition sequence mirrors previous observations in low-temperature studies. Slow compression results formation recoverable saturated product with 2D monoclinic diffraction pattern (0001) agrees closely atomistic...
Relative to the rich library of small-molecule organics, few examples ordered extended (i.e., nonmolecular) hydrocarbon networks are known. In particular, sp3 bonded, diamond-like materials represent appealing targets because their desirable mechanical, thermal, and optical properties. While many covalent organic frameworks (COFs)—extended, covalently porous structures—have been realized through molecular architecture with exceptional control, design synthesis dense, solids has a...
Abstract Recent advancements in the field of two-dimensional (2D) materials have led to discovery a wide range 2D with intriguing properties. Atomistic-scale simulation methods played key role these discoveries. In this review, we provide an overview recent progress ReaxFF force developments and applications modeling following layered nonlayered materials: graphene, transition metal dichalcogenides, MXenes, hexagonal boron nitrides, groups III-, IV- V-elemental materials, as well mixed...
Solid-state NMR (1H/13C CPMAS) was utilized to identify structural differences in amylose tris(3,5-dimethylphenylcarbamate) chiral stationary phase (Chiralpak AD), as a function of mobile-phase composition. Dry Chiralpak AD displayed an amorphous CPMAS spectrum. However, spectra flushed with organic mobile phases clearly evidence solvent complexes. nonpolar hexane exhibited complexes minimal perturbation. For containing alcohol modifiers, however, incorporation caused significant difference...
Supramolecular synthons are exploited to synthesize –OH functionalized sp<sup>3</sup>-rich sequence-defined nanothreads using pressure-induced polymerization of a phenol:pentafluorophenol co-crystal.
Poly(vinylidene fluoride) (PVDF) is a well-known polymer with (−CH2–CF2−)n chemical formula that used, in particular, electronic devices. The spatial arrangements of −CH2– and −CF2– units the alignment PVDF chains determine ferroelectricity, pyroelectricity, piezoelectricity condensed-phase PVDF. can be fabricated Al metal as an energetic composite for rocket propellants. To better understand how molecular structures affect properties condensed phase reaction mechanisms Al, we have developed...
Carbon nanothreads are a new one-dimensional sp3-bonded nanomaterial of CH stoichiometry synthesized from benzene at high pressure and room temperature by slow solid-state polymerization. The resulting threads assume crystalline packing hundreds micrometers across. We show high-resolution electron microscopy (HREM) images hexagonal arrays well-aligned thread columns that traverse the 80–100 nm thickness prepared sample. Diffuse scattering in diffraction reveals packed with axial and/or...
For game changing for future of large-scale energy storage technologies, sodium-ion and potassium-ion batteries provide a substitute to lithium-ion batteries. As an excellent candidate anode, MXene still suffers from the blockage active sites caused by restacking sheets. Herein, in-situ decoration nanosheets with nitrogen-doped carbon nanotubes (CNTs) is introduced, yield MXene@CNTs. The modification CNTs not only prevents increases ion accessibility but also improves electrode’s overall...
Phonons are the primary heat carriers in non-metallic solids. In compositionally heterogeneous materials, thermal properties believed to be mainly governed by disrupted phonon transport due mass disorder and strain fluctuations, while effects of compositional fluctuation induced local states usually ignored. Here, scanning transmission electron microscopy energy loss spectroscopy sophisticated calculations, we identify vibrational ingredient-dependent interface modes Al x Ga 1 – N quantify...
A one-dimensional (1D) sp3 carbon nanomaterial with high lateral packing order, known as nanothreads, has recently been synthesized by slowly compressing and decompressing crystalline solid benzene at pressure. The atomic structure of an individual nanothread not yet determined experimentally. We have calculated the 13C nuclear magnetic resonance (NMR) chemical shifts, shielding tensors, anisotropies several axially ordered disordered partially saturated fully nanothreads within density...
The molecular structure of nanothreads produced by the slow compression
Syn furan nanothreads have all oxygen atoms arranged on one side of the thread backbone; these polar threads present intriguing opportunities in electromechanical response owing to their rigid ladder-like backbone. We retrained a C/H/O reactive force field simulate external electric for both end-anchored individual and bulk nanothread crystals, contrasting results those poly(vinylidene fluoride) (PVDF) polymer. Whereas induces length-independent torque PVDF through backbone rotation about σ...
The synthesis of several inherently chiral tribenzotriquinacenes (TBTQs) bearing one single mono- or difunctionalized aromatic nucleus and the optical resolution these derivatives, a TBTQ-based salicylic acid (11), are described for first time. Efficient access to enantiopure, may lay foundation studies novel container compounds, supramolecular aggregation, recognition, asymmetric catalysis.
We describe a general, symmetry-conditioned way of enumerating isomers saturated singly substituted one-dimensional nanothreads the (CH)5E and (CH)5CR type, where E is heteroatom R substituent. Four - so-called tube (3,0), polytwistane, zipper polymer, polymer I, are treated in detail. The methodology, combining symmetry arguments computer-based enumeration, generally applicable to isomerism problems polymers.