• Publications
  • Influence
Nanotubes from Carbon.
  • P. Ajayan
  • Chemistry, Medicine
    Chemical reviews
  • 1 May 1999
The mechanical behavior of multiwalled carbon nanotube/epoxy composites was studied in both tension and compression. It was found that the compression modulus is higher than the tensile modulus,
Graphene quantum dots derived from carbon fibers.
It is reported that during the acid treatment and chemical exfoliation of traditional pitch-based carbon fibers, that are both cheap and commercially available, the stacked graphitic submicrometer domains of the fibers are easily broken down, leading to the creation of GQDs with different size distribution in scalable amounts.
Large scale growth and characterization of atomic hexagonal boron nitride layers.
The large area synthesis of h-BN films consisting of two to five atomic layers, using chemical vapor deposition, show a large optical energy band gap of 5.5 eV and are highly transparent over a broad wavelength range.
Vapour phase growth and grain boundary structure of molybdenum disulphide atomic layers.
The controlled vapour phase synthesis of molybdenum disulphide atomic layers is reported and a fundamental mechanism for the nucleation, growth, and grain boundary formation in its crystalline monolayers is elucidated.
Fracture toughness of graphene.
The combined experiment and modelling verify the applicability of the classic Griffith theory of brittle fracture to graphene and quantifies the essential fracture properties of graphene and provides mechanistic insights into the mechanical failure of graphene.
Structural and Spectral Features of Selenium Nanospheres Produced by Se-Respiring Bacteria
Large differences in the optical properties (UV-visible absorption and Raman spectra) of purified extracellular nanospheres produced in this manner by the three different bacterial species differed substantially from those of amorphous Se(0) formed by chemical oxidation of H2Se and of black, vitreous Se(*) formed chemically by reduction of selenite with ascorbate.
New insights into the structure and reduction of graphite oxide.
This work has devised a complete reduction process through chemical conversion by sodium borohydride and sulfuric acid treatment, followed by thermal annealing that is particularly effective in the restoration of the π-conjugated structure, and leads to highly soluble and conductive graphene materials.
Large-scale synthesis of carbon nanotubes
INTEREST in carbon fibres1,2 has been stimulated greatly by the recent discovery of hollow graphitic tubules of nanometre dimensions3. There has been much speculation about the properties and