A5077975491- Diamond and Carbon-based Materials Research
- Carbon Nanotubes in Composites
- Graphene research and applications
- Advanced Electron Microscopy Techniques and Applications
- Force Microscopy Techniques and Applications
- Catalytic Processes in Materials Science
- Boron and Carbon Nanomaterials Research
- Mesoporous Materials and Catalysis
- Aerogels and thermal insulation
- 2D Materials and Applications
- Near-Field Optical Microscopy
- Advanced NMR Techniques and Applications
- Chemical Synthesis and Characterization
- Fullerene Chemistry and Applications
- Advanced ceramic materials synthesis
- Semiconductor materials and interfaces
- Advancements in Battery Materials
- Nuclear materials and radiation effects
- Silicon Nanostructures and Photoluminescence
- Advanced Battery Materials and Technologies
- X-ray Diffraction in Crystallography
- MXene and MAX Phase Materials
- High-pressure geophysics and materials
- Catalysis and Oxidation Reactions
- Crystallization and Solubility Studies
DuPont (United States)
2021
Pennsylvania State University
2016-2019
Union College
2015
The compression of glassy carbon forms a series lightweight, ultrastrong, hard, elastic, and conductive carbons.
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...
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...
Phase-pure samples of a metastable allotrope silicon, Si–III or BC8, were synthesized by direct elemental transformation at 14 GPa and ∼900 K also significantly reduced pressure in the Na–Si system 9.5 quenching from high temperatures ∼1000 K. Pure sintered polycrystalline ingots with dimensions ranging 0.5 to 2 mm can be easily recovered ambient conditions. The chemical route allowed us decrease synthetic pressures as low 7 GPa, while required for phase transition silicon are higher. In...
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...
Tetracyanomethane, C(CN)4, is a tetrahedral molecule containing central sp3 carbon that coordinated by reactive nitrile groups could potentially transform to an extended CN network with significant fraction of carbon. High-purity C(CN)4 was synthesized, and its physiochemical behavior studied using in situ synchrotron angle-dispersive powder X-ray diffraction (PXRD) Raman infrared (IR) spectroscopies diamond anvil cell (DAC) up 21 GPa. The pressure dependence the fundamental vibrational...
Na4Si24 is the precursor to Si24, a recently discovered allotrope of silicon. With quasidirect band gap near 1.3 eV, Si24 has potential transform silicon-based optoelectronics including solar energy conversion. However, lack large, pure crystals prevented characterization intrinsic properties and delayed deposition-based metastable growth efforts. Here, we report an optimized synthesis methodology for single-crystalline with approaching millimeter-size scale conditions 9 GPa 1123 K....
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Journal Article Low Dose Characterization of Diamondoid Carbon Nanothreads by Transmission Electron Microscopy Get access Stephen Juhl, Juhl Department Chemistry, Pennsylvania State University, University Park, PA, USA Search for other works this author on: Oxford Academic Google Scholar Xiang Li, Li John Badding, Badding USADepartment Materials Science and Engineering, Nasim Alem Microanalysis, Volume 23, Issue S1, 1 July 2017, Pages 1846–1847, https://doi.org/10.1017/S1431927617009898...
An abstract is not available for this content so a preview has been provided. As you have access to content, full PDF via the 'Save PDF' action button.
An abstract is not available for this content so a preview has been provided. As you have access to content, full PDF via the ‘Save PDF’ action button.
An abstract is not available for this content so a preview has been provided. As you have access to content, full PDF via the ‘Save PDF’ action button.