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Autor:
Linda S. Schadler, Nachiket R. Raravikar, P. M. Ajayan, Xi-Cheng Zhang, Yiping Zhao, Y.-C. Chen, Gwo-Ching Wang, Toh-Ming Lu
Publikováno v:
Applied Physics Letters. 81:975-977
Using a pump–probe method with a 150 fs laser at the wavelength of 1.55 μm, we have experimentally demonstrated that single-walled carbon nanotubes (SWNT) have an exciton decay time of less than 1 ps and a high third-order polarizability, which is
Publikováno v:
Applied Physics Letters. 80:1435-1437
Composite structures of single walled carbon nanotubes (SWNTs) and poly(3-octylthiophene) polymer were tested as field emitters. The structures studied were formed on n+-Si by mixing the two materials after they had been dissolved in chloroform. Thre
Publikováno v:
Applied Physics Letters. 78:1814-1816
We report efficient dynamic gratings in close-packed solids of CdSe nanocrystals. These gratings are formed on the subpicosecond time scale and have diffraction efficiencies up to 0.5% for film thicknesses of ∼0.5 μm. Nanocrystal solids combine th
Publikováno v:
Applied Physics Letters. 78:978-980
The CNx/carbon nanotube junctions were successfully synthesized by microwave plasma-assisted chemical vapor deposition method from the mixture of N2/CH4 and H2/CH4 gases in a continuous growth process. High resolution transmission electron microscopy
Publikováno v:
Applied Physics Letters. 77:2734-2736
We have studied the magnetic and magnetotransport properties of the perovskite LaMn1−xCuxO3 (x⩽0.3). All of these compounds show ferromagnetism and cluster glass behavior at low temperatures. Though no metallic-insulating transition associated wi
Autor:
Mei Ling Wu, Simone Anders, Gino Mariotto, M. U. Guruz, Vinayak P. Dravid, F.L. Freire, Yip-Wah Chung
Publikováno v:
Applied Physics Letters. 76:2692-2694
A carbon nitride phase with primarily sp3-bonded carbon is stabilized in CNx/ZrN superlattice coatings. Rutherford backscattering spectrometry measurements give a N/C atomic ratio ∼1.3 for the CNx layers. High-resolution transmission electron micro
Autor:
Liming Dai, Qidao Chen
Publikováno v:
Applied Physics Letters. 76:2719-2721
We have prepared micropatterns of carbon nanotubes on a wide range of substrates either by patterned growth of aligned nanotubes on surfaces prepatterned with plasma polymers (e.g., n-hexane plasma polymer) or through region-specific adsorption of ce
Publikováno v:
Applied Physics Letters. 74:3317-3319
Composites of uniaxially oriented multiwalled carbon nanotubes embedded in polymer matrices were fabricated and investigated by transmission electron microscopy. In strained composite films, buckling was ubiquitously observed in bent nanotubes with l
Autor:
Hanoch Daniel Wagner, O. Lourie
Publikováno v:
Applied Physics Letters. 73:3527-3529
Well-aligned bundles of single-wall carbon nanotubes under tensile stresses were observed to fracture in real-time by transmission electron microscopy. The expansion of elliptical holes in the polymer matrix results in a tensile force in bridging nan
Publikováno v:
Applied Physics Letters. 72:188-190
We report the observation of single nanotube fragmentation, under tensile stresses, using nanotube-containing thin polymeric films. Similar fragmentation tests with single fibers instead of nanotubes are routinely performed to study the fiber-matrix