Browsing by Author "Dowd Annette"

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Browsing by Author "Dowd Annette"

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  • The aluminium-copper-gold ternary system 
    Bhatia Vijay; Levey F; Kealley Catherine; Dowd Annette; Cortie Michael (World Gold Council, 2009)
    Despite Au, Al and Cu being individually very well-known elements, their ternary phase diagram has not been studied in as much detail as those of many other Au-containing ternaries. Here we review what is known, and consider ...
  • Analysis of admixed CeO2 nanoparticles via TEM and x-ray diffraction techniques 
    Vella A; Whitley Rhys; Armstrong Nicholas; Dowd Annette; Cline James (Australian Institute of Physics, 2006)
    The techniques used to identify nanoparticle size and shape characteristics are of vital importance in the development of functional nanoparticles. Each technique offers different advantages; this work compares the two ...
  • Bayesian analysis of ceria nanoparticles from line profile data 
    Armstrong Nicholas; Dowd Annette; Cline James; Kalceff Walter (International Centre for Diffraction Data, 2005)
    A Bayesian/Maximum entropy (MaxEnt) method is applied to quantify the broadening of xray line profiles in terms of the nanocrystallite size effects in ceria. The analysis is in general agreement with transmission electron ...
  • Calorimetric sensor for use in hydrogen peroxide aqueous solutions 
    Porkovich Alexander; Arnold Matthew; Kouzmina Galina; Hingley Brian; Dowd Annette; Cortie Michael (American Scientific Publishers, 2011)
    A sensor for characterising aqueous solutions of hydrogen peroxide is described. The sensor is based on the calorimetric signal obtained when catalysing the decomposition of H(2)O(2). The system is quick and simple, and ...
  • Cathodoluminescence as a method of extracting detailed information from nanophotonics systems: a study of silicon nanocrystals 
    Phillips Matthew; Ton-That Cuong; Dowd Annette; Armstrong Nicholas; Johansson Birger (SPIE-Int Society Optical Engineering, 2006)
    We investigated Si nanocaystal samples produced by high dose 600 keV Si+ implantation of fused silica and annealing using cathodoluminescence (CL). CL spectra collected under 5-25 keV electron irradiation show similar ...
  • Coreshell Nanoparticles With Selfregulating Plasmonic Functionality 
    Cortie Michael; Dowd Annette; Harris Nadine; Ford Michael (American Physical Society, 2007)
    We propose a smart nanoparticle, a “regulatron,” that exploits a cycle of dynamic plasmonic feedback to self-regulate its temperature to a fixed range. One kind of regulatron can be conceived from VO2 and Au; the temperature ...
  • Electronic structure of potassiumdoped La@C82 metallofullerene studied with photoelectron spectroscopy 
    Ton-That Cuong; Dowd Annette; Shard Alex; Dhanak Vinod; Taninaka Atsushi; Shinohara Hisanori; Welland Mark (American Physical Society, 2007)
    The electronic structure of potassium-doped La@C82 has been studied with synchrotron-radiation photoelectron spectroscopy. Ultraviolet photoemission measurements indicate evolution of the valence-band states of La@C82 ...
  • Emission of collimated THz pulses from photoexcited semiconductors 
    Johnston Michael; Dowd Annette; Driver Robert; Linfield Edmund; Davies A.; Whittaker David (Institute of Physics Publishing, 2004)
    It is shown experimentally that surface-field terahertz (THz) emitters can produce well-collimated beams of THz radiation, making them useful devices for time-domain spectroscopy applications. Simulations of the carri ...
  • Generation of highpower terahertz pulses in a prism 
    Johnston Michael; Whittaker David; Dowd Annette; Davies A.; Linfield Edmund; Li X; Ritchie D (Optical Society of America, 2002)
    A compact, high-power emitter of half-cycle terahertz (THz) radiation is demonstrated. The device consists of an epitaxial InAs emitter upon a GaAs prism and produces THz pulses that are 20 times more powerful than those ...
  • Linear optical properties of Ge nanocrystals in silica 
    Dowd Annette; Elliman Robert; Luther-Davies Barry (American Institute of Physics, 2001)
    The absorption and extinction spectra of Ge nanocrystals in silica formed by ion implantation are studied using photothermal deflection and transmission spectroscopies. It is found that scattering makes a significant ...
  • Magnetic-field-induced enhancement of terahertz emission from III-V semiconductor surfaces 
    Johnston Michael; Corchia A; Dowd Annette; Linfield Edmund; Davies A.; Mclaughlin Robert; Arnone Don; Pepper Michael (Elsevier, 2002)
    We discuss the origins of the magnetic-field-induced enhancement of terahertz (THz) emission from bulk semiconductor surfaces. The principal effect of the magnetic field is to rotate the THz dipole and hence dramatically ...
  • Nonlinear Optical Properties Of Semiconducting Nanocrystals In Fused Silica 
    Dowd Annette; Samoc Marek; Luther-Davies Barry; Elliman Robert (Elsevier Science Bv, 1999)
    Degenerate four-wave mixing (DFWM) is used to examine the nonlinear optical response of Ge nanocrystals in a silica matrix. The nanocrystals are formed by implanting 1.0 MeV Ge ions into silica to a dose of 3.0x10(17) Ge ...
  • Nonlinear Optical Response Of Ge Nanocrystals In A Silica Matrix 
    Dowd Annette; Elliman Robert; Samoc Marek; Luther-Davies Barry (Amer Inst Physics, 1999)
    Time-resolved degenerate-four-wave-mixing measurements were used to study the nonlinear optical response (intensity-dependent refractive index! of Ge nanocrystallites embedded in a silica matrix. Nanocrystals were fabricated ...
  • Optical Properties And Plasmon Resonances Of Titanium Nitride Nanostructures 
    Cortie Michael; Giddings Jye; Dowd Annette (Iop Publishing Ltd, 2010)
    We examine the optical properties of nanostructures comprised of titanium nitride, TiN, an electrically conducting intermetallic-like compound. This material can be deposited in the form of durable films by physical vapor ...
  • Physical and optical characterisation of Ge-implanted silica 
    Dowd Annette; Llewellyn David; Elliman Robert; Luther-Davies Barry; Samoc Marek; Fitz Gerald John (Elsevier Inc, 2001)
    Ge nanocrystals formed in silica by implantation with 1.0 MeV Ge ions and subsequent annealing at 1100°C were characterised by transmission electron microscopy and Raman spectroscopy. The nanocrystals were found to be ...
  • The preparation of a plasmonically resonant VO2 thermochromic pigment 
    Cortie Michael; Maaroof Abbas; Kealley Catherine; Bai H; Dowd Annette; Smith Geoffrey (Iop Publishing Ltd, 2009)
    Vanadium dioxide (VO2) undergoes a reversible metal-insulator transition, normally at similar to 68 degrees C. While the properties of continuous semi-transparent coatings of VO2 are well known, there is far less information ...
  • Synthesis of hollow gold nanoparticles and rings using silver templates 
    Cortie Michael; Dowd Annette; Edgar Jonathan; Blaber Martin; Zareie Hadi (IEEE, 2008)
    Gold nanoshells have gained attention recently due to their versatile optical properties. In particular, their spectrally selective extinction has been exploited for experimental medical applications, functional coatings ...
  • Thermal Stability of (KxNayH1-x-y)2Ti6O13 Nanofibers 
    Cortie Michael; Xiao Linda; Erdei Laszlo; Kealley Catherine; Dowd Annette; Kimpton Justin; Mcdonagh Andrew (Wiley - V C H Verlag GmbH & Co. KGaA, 2011)
    Potassium-rich titanate nanofibers were produced by digesting TiO2 in concentrated KOH solutions under hydrothermal conditions. The nanofibers were characterized by scanning electron microscopy, energy dispersive X-ray ...
  • Thin Films of AuCuAl Shape Memory Alloy for Use in Plasmonic Nano-actuators 
    Bhatia Vijay; Thorogood Gj; Dowd Annette; Cortie Michael (Cambridge University Press, 2011)
    Vijay Bhatia, Gordon Thorogood, Annette Dowd and Michael B. Cortie (2011). Thin Films of AuCuAl Shape Memory Alloy for Use in Plasmonic Nano-actuators. MRS Proceedings, 1295 , mrsf10-1295-n01-08 doi:10.1557/opl.2011.180