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  • Online Resource  (17)
  • AIP Publishing  (17)
  • Lian, Jie  (17)
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  • Online Resource  (17)
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  • AIP Publishing  (17)
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  • 1
    Online Resource
    Online Resource
    Conjugation of quantum dots and Fe3O4 on carbon nanotubes for medical diagnosis and treatment
    AIP Publishing ; 2009
    In:  Applied Physics Letters Vol. 95, No. 22 ( 2009-11-30)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 95, No. 22 ( 2009-11-30)
    Abstract: Quantum dots (QDs) and Fe3O4 nanoparticles were conjugated onto the surfaces of carbon nanotubes (CNTs) for medical diagnosis and treatment. The nanoassembly was designed to meet the specific needs in cancer in vivo imaging and simultaneous treatment. The key functionalities needed for clinical applications were integrated, including CNT surface functionalization for attachment of biological molecules in targeting, drug storage capabilities, fluorescent emissions near the infrared range, and magnetic hyperthermia. CNT-QD-Fe3O4 developed exhibited a strong fluorescence near the infrared region for noninvasive optical in vivo imaging. Magnetization measurements showed nearly reversible hysteresis curves from CNT-QD-Fe3O4 nanoassembly. Fe3O4 conjugated CNT was found to experience hyperthermia heating under alternating electromagnetic field.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.3268469
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2009
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 2
    Online Resource
    Online Resource
    Peculiar structure and tensile strength of WB4: nonstoichiometric origin
    AIP Publishing ; 2012
    In:  AIP Advances Vol. 2, No. 1 ( 2012-03-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 2, No. 1 ( 2012-03-01)
    Abstract: Tungsten tetraboride (WB4) is experimentally considered as potentially superhard material and is therefore expected to have highly structural stability and enhanced resistance against plastic deformation and failure. The examinations of bond-deformation mechanism suggest a significantly soft bond-deformation pattern induced by ionic W-B bonding for nominal WB4 in experiments, largely responsible for the limitation of its strength and structural integrity. Computations on the structures and mechanical properties for WB4 show a novel thermodynamically favored MoB4-type phase with excellent mechanical properties and remarkable incompressibility along c direction. The illustrations of nonstoichiometry and x-ray diffraction spectra rationalize the experimental observation of nominal composition WB4 as defective tungsten borides (W1-xB3 (x & lt;0.25) or WB4-x (x & gt;0.25)). The results provide new insight into the real structural and mechanical properties of tungsten borides.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/1.3696721
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2012
    detail.hit.zdb_id: 2583909-3
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  • 3
    Online Resource
    Online Resource
    Luminescent hydroxylapatite nanoparticles by surface functionalization
    AIP Publishing ; 2006
    In:  Applied Physics Letters Vol. 89, No. 18 ( 2006-10-30)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 89, No. 18 ( 2006-10-30)
    Abstract: Hydroxylapatite (HA) nanoparticles were functionalized by depositing rare-earth-doped Y2O3 nanoparticles on the surface, and the structural evolutions of both HA and Y2O3 phases at different annealing temperatures were investigated by x-ray diffraction and transmission electron microscopy. Laser spectroscopy indicated that the surface functionalized HA nanoparticles exhibited strong visible emissions. No visible emissions were observed from rare-earth-doped Y2O3 without any substrate, suggesting a doping-induced environmental change of optically active rare-earth elements in the functionalized HA nanoparticles. The luminescent hydroxylapatite nanoparticles may find important applications as a biodegradable substrate for biomarking and drug delivery.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.2374687
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2006
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 4
    Online Resource
    Online Resource
    Effects of plasma surface modification on interfacial behaviors and mechanical properties of carbon nanotube-Al2O3 nanocomposites
    AIP Publishing ; 2007
    In:  Applied Physics Letters Vol. 91, No. 26 ( 2007-12-24)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 91, No. 26 ( 2007-12-24)
    Abstract: The effects of plasma surface modification on interfacial behaviors in carbon nanotube (CNT) reinforced alumina (Al2O3) nanocomposites were studied. A unique plasma polymerization method was used to modify the surfaces of CNTs and Al2O3 nanoparticles. The CNT-Al2O3 nanocomposites were processed by both ambient pressure and hot-press sintering. The electron microscopy results showed ultrathin polymer coating on the surfaces of CNTs and Al2O3 nanoparticles. A distinctive stress-strain curve difference related to the structural interfaces and plasma coating was observed from the nanocomposites. The mechanical performance and thermal stability of CNT-Al2O3 nanocomposites were found to be significantly enhanced by the plasma-polymerized coating.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.2824865
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2007
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 5
    Online Resource
    Online Resource
    Tailoring oxidation degrees of graphene oxide by simple chemical reactions
    AIP Publishing ; 2011
    In:  Applied Physics Letters Vol. 99, No. 5 ( 2011-08-01)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 99, No. 5 ( 2011-08-01)
    Abstract: High quality graphene oxide (GO) with controllable degrees of oxidation was synthesized by simple chemical reactions inspired by approaches to unzip single wall carbon nanotubes using strong oxidizing agents. As compared to the conventional Hummers method, these reactions are less exo-therm involved without emission of toxic gases. The structural characteristics of the synthesized GO with various oxidation degrees were evaluated by x-ray diffraction, x-ray photoelectron spectroscopy, Raman spectroscopy, thermal gravimetric analysis, and UV-vis-IR spectroscopy. GO with tailored degrees of oxidation displays tunable optoelectronic properties and may have a significant impact on developing graphene- or GO-based platforms for various technological applications.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.3622637
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2011
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 6
    Online Resource
    Online Resource
    First-principles study of electronic properties of La2Hf2O7 and Gd2Hf2O7
    AIP Publishing ; 2007
    In:  Journal of Applied Physics Vol. 102, No. 6 ( 2007-09-15)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 102, No. 6 ( 2007-09-15)
    Abstract: The structural and electronic properties of A2Hf2O7 (A=La and Gd) pyrochlore compounds are investigated by means of first-principles total energy calculations. Also, the formation energies of defects are calculated, and the results can be used to explain the stability of pyrochlores. Hybridizations between A 5p and O 2s and between A 5d and O 2p states are observed, but the interaction between A 5p and O 2s orbitals is much stronger in Gd2Hf2O7 than that in La2Hf2O7. Gd2Hf2O7 shows a density of state distribution much different from that of La2Hf2O7. Mulliken overlap population analysis shows that the A–O48f and A–O8b bonds in Gd2Hf2O7 are more ionic than the corresponding bonds in La2Hf2O7, while the Hf–O48f bond in Gd2Hf2O7 is more covalent. These calculations suggest that A–O48f and A–O8b bonds may play important roles in their response to irradiation-induced amorphization observed experimentally.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.2779262
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2007
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 7
    Online Resource
    Online Resource
    Microstructural evolution and nanocrystal formation in Pb+-implanted ZrSiO4 single crystals
    AIP Publishing ; 2003
    In:  Journal of Applied Physics Vol. 94, No. 9 ( 2003-11-01), p. 5695-5703
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 94, No. 9 ( 2003-11-01), p. 5695-5703
    Abstract: Single crystals of ZrSiO4 (zircon) with a (110) orientation were implanted with 300 keV Pb+ at room temperature to fluences ranging from 1014 to 1017 ions/cm2. The damage accumulation and microstructural evolution were analyzed by cross-sectional transmission electron microscopy (TEM) and glancing-angle x-ray diffraction (XRD). The experimental damage profiles as observed by TEM and XRD methods were compared to Monte Carlo simulations using the SRIM-2000 code. At the lowest ion fluence (1014 ions/cm2), a buried amorphous layer formed in the zircon matrix. The surface layer is highly damaged and consists of zircon nanocrystals. The critical amorphization dose for zircon implanted with 300 keV Pb+ was in the range of 0.25–0.43 displacements per atom. With increasing ion fluence, the thickness of the amorphous layer increased. When the Pb concentration in the substrate exceeded ∼3.5 at. % (i.e., at 1017 ions/cm2), Pb nanoparticles precipitated at room temperature and formed a layer ∼90 nm thick embedded within the amorphous zircon matrix. Effects of the displacement energies employed in the SRIM-2000 simulation on the damage profiles and the critical amorphization dose were also analyzed.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.1618917
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2003
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 8
    Online Resource
    Online Resource
    Energetic stability, structural transition, and thermodynamic properties of ZnSnO3
    AIP Publishing ; 2011
    In:  Applied Physics Letters Vol. 98, No. 9 ( 2011-02-28)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 98, No. 9 ( 2011-02-28)
    Abstract: First principles calculations were performed on ZnSnO3 polymorphs to understand their energetic stability and structural transition under high pressure environments. The experimentally-identified ilmenite (IL)-type and LiNbO3 (LN)-type ZnSnO3 may coexist at zero pressure considering the effect of zero point energy. IL-type ZnSnO3 becomes unstable under high pressure due to the appearance of imaginary frequency in phonon spectra. Enthalpy differences suggest that the phase stability follows the sequence: ZnO+SnO2 below 5.9 GPa, Zn2SnO4+SnO2 up to 7.1 GPa, and LN-type phase above 7.1 GPa. Pressurization at 34.5 GPa causes a phase transformation from the LN-type to the orthorhombic CdSnO3-type. Thermodynamic properties including Helmholtz free energy, specific heat at constant volume and Debye temperature were also calculated.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.3562013
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2011
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 9
    Online Resource
    Online Resource
    Erratum: “Microstructural evolution and nanocrystal formation in Pb+-implanted ZrSiO4 single crystals” [J. Appl. Phys. 94 , 5695 (2003)]
    AIP Publishing ; 2004
    In:  Journal of Applied Physics Vol. 96, No. 1 ( 2004-07-01), p. 937-937
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 96, No. 1 ( 2004-07-01), p. 937-937
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.1753069
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2004
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 10
    Online Resource
    Online Resource
    Ion-beam-induced amorphization and order-disorder transition in the murataite structure
    AIP Publishing ; 2005
    In:  Journal of Applied Physics Vol. 97, No. 11 ( 2005-06-01)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 97, No. 11 ( 2005-06-01)
    Abstract: Murataite (A3B6C2O22−x∕2,F4¯3m), a derivative of an anion-deficient fluorite structure, has been synthesized as different polytypes as a result of cation ordering. Ion-beam-induced amorphization has been investigated by 1-MeV Kr2+ ion irradiation with in situ transmission electron microscopy. The critical amorphization dose was determined as a function of temperature and the degree of structural disordering. A lower critical amorphization temperature (∼860K) was obtained for the disordered murataite as compared with that of the murataite superstructure (930to1060K). An ion-beam-induced ordered murataite to a disordered fluorite transition occurred in the murataite superstructure, similar to that observed in the closely related pyrochlore structure-type, A2B2O7. The ion-beam-induced defect fluorite structure is more energetically stable in the murataite structure with a higher degree of structural disordering, as compared with the murataite superstructure. This suggests that the degree of intrinsic structural disorder has a significant effect on the energetics of structural disordering process; this affects the tendency toward the order-disorder structural transition for fluorite-related compounds and their response to ion-beam-induced amorphization.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.1926394
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2005
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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