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Browsing by Author "Gunning, Robert D."

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Browsing by Author "Gunning, Robert D."

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  • Bala, Tanushree; Gunning, Robert D.; Vankatesan, Munuswamy; Godsell, Jeffrey F.; Saibal, Roy; Ryan, Kevin M. (IOP Science, 2009)
    The paper presents a facile method for decreasing the size of water dispersible Ni nanoparticles from 30 nm to 3 nm by the incorporation of a passivating surfactant combination of pluronic triblock copolymer and oleic acid ...
  • Singh, Ajay; Gunning, Robert D.; Ahmed, Shafaat; Barrett, Christopher A.; English, Niall J.; Garate, José-Antonio; Ryan, Kevin M. (Royal Society of Chemistry, 2012)
    Spontaneous supercrystal organisation of semiconductor nanorods (CdS and CdSe) of different aspect ratios into ordered superstructures was obtained by controlled evaporation of a nanorod solution. The rods either align ...
  • Singh, Ajay; Gunning, Robert D.; Sanyal, Ambarish; Ryan, Kevin M. (Royal Society of Chemistry, 2010)
    Coulomb repulsion due to the surface charge on semi-conductor nanorods works against the dipole-dipole attraction that tends to direct the nanorods to self-assemble; the nature of this self10 assembly for CdSe nanorods ...
  • Venkatesan, Munuswamy; Rhen, Fernando M.F.; Gunning, Robert D.; Coey, John Michael David (IEEE Computer Society, 2009)
    The effect of Fe, Cu, Zr, and Ti substitution on magnetic properties of SmCo 1:7 magnets at temperatures up to 500°C were studied. As-milled amorphous Sm(Co,Fe,Cu,Ti-Zr)7 magnets crystallized in the TbCu7-type structure ...
  • Barrett, Christopher A.; Gunning, Robert D.; Hantschel, Thomas; Arstila, Kai; Ryan, Kevin M. (Royal Society of Chemistry, 2010)
    High yields of single-crystalline silicon nanowires and germanium/silicon oxide core-shell nanostructures were synthesized using a supercritical fluid-solid-solid growth mechanism. The formation of the one-dimensional ...
  • Gunning, Robert D.; O'Sullivan, Catriona; Ryan, Kevin M. (Royal Society of Chemistry, 2010)
    A multi rate kinetic model to explain the spontaneous oriented attachment of CdS nanorods in the presence of an amine is presented. The model demonstrates the reasons that elongation is restricted to a maximum of quadruple ...
  • Barrett, Christopher A.; Geaney, Hugh; Gunning, Robert D.; Laffir, Fathima R.; Ryan, Kevin M. (Royal Society of Chemistry, 2011)
    High yields of single-crystalline Ge nanowires (NWs) were synthesized through the thermal decomposition of diphenylgermane (DPG) in the vapor phase of a high boiling point organic solvent. The NWs were single crystal and ...
  • Geaney, Hugh; Dickinson, Calum; Weng, Weihao; Kiely, Christopher J.; Barrett, Christopher A.; Gunning, Robert D.; Ryan, Kevin M. (American Chemical Society, 2011)
    Here we show the impact of preferred growth directions and defects in the formation of complex Ge nanowire (NW) structures grown by a simple organic medium based synthesis. Various types of NWs 15 are examined including: ...
  • O'Sullivan, Catriona; Gunning, Robert D.; Barrett, Christopher A.; Singh, Ajay; Ryan, Kevin M. (Royal Society of Chemistry, 2010)
    Gold tip size and multiplicity is controlled in hybrid gold-semiconductor nanorods (CdS-Au, CdSe-Au and CdTe-Au) in fast reaction times of less than 2 minutes by optimising precursor type, concentration, and temperature. ...
  • O'Sullivan, Catriona; Gunning, Robert D.; Sanyal, Ambarish; Barrett, Christopher A.; Geaney, Hugh; Laffir, Fathima R.; Ahmed, Shafaat; Ryan, Kevin M. (American Chemical Society, 2009)
    Spontaneous elongation from nanorod to nanowire in the presence of an amine is reported for nanocrystals of cadmium sulfide and silver sulfide (cation exchanged from CdS). Elongation occurs instantaneously where the final ...

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