Browsing Physics (Scholarly Publications) by Author "Zhang, Hongzhou"
Now showing items 1-10 of 10
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Bacterially synthesized tellurium nanostructures for broadband ultrafast nonlinear optical applications
Blau, Werner; Zhang, Hongzhou (2019)Elementary tellurium is currently of great interest as an element with potential promise in nano-technology applications because of the recent discovery regarding its three two-dimensional phases and the existence of Weyl ... -
A comparison of He and Ne FIB imaging of cracks in microindented silicon nitride
Zhang, Hongzhou (2018)Helium ion microscopy (HIM) offers potential as a high spatial resolution technique for imaging insulating samples that are susceptible to charging artifacts. In this study helium and neon ion microscopy are used to image ... -
Elemental preference and atomic scale site recognition in a Co-Al-W-base superalloy
Zhang, Hongzhou; Maguire, Pierce (2017) -
Helium ion microscope generated nitrogen-vacancy centres in type Ib diamond
Donegan, John; Cross, Graham; Zhang, Hongzhou; Mc Closkey, David (2014)We report on position and density control of nitrogen-vacancy (NV) centres created in type Ib diamond using localised exposure from a helium ion microscope and subsequent annealing. Spatial control to <380 nm has been ... -
Investigation of coupled cobalt-silver nanoparticle system by plan view TEM
Shvets, Igor; Zhang, Hongzhou (2012) -
Ni(OH)2@Co(OH)2 hollow nanohexagons: Controllable synthesis, facet-selected competitive growth and capacitance property
Zhang, Hongzhou (2014)Hollow nanohexagons with a core?shell structure have been synthesized from a mixture of Ni and Co hydroxide by a mild wet chemical approach. Ni(OH)2@Co(OH)2 nanohexagons with controllable sizes of about 200 nm, morphology ... -
Oxide-mediated self-limiting recovery of field effect mobility in plasma-treated MoS2
Mc Guinness, Cormac; Zhang, Hongzhou; Ferreira, Mauro; Bradley, Louise; Boland, John; Nicolosi, Valeria (2018) -
Photoresponsivity enhancement in monolayer MoS<inf>2</inf> by rapid O<inf>2</inf>:Ar plasma treatment
Zhang, Hongzhou; Lunney, James (2019)We report up to ten-fold enhancement of the photoresponsivity of monolayer molybdenum disulfide (MoS2) by treatment with O2:Ar (1:3) plasma. We characterize the surface of plasma-exposed MoS2 by TEM, Raman, and PL mapping ... -
Suppression of the Shear Raman Mode in Defective Bilayer MoS2
Nicolosi, Valeria; Mc Evoy, Niall; Zhang, Hongzhou (2019)We investigate the effects of lattice disorders on the low frequency Raman spectra of bilayer MoS 2. The bilayer MoS 2 was subjected to defect engineering by irradiation with a 30 keV He + ion beam, and the induced morphology ... -
Synthesis, characterization and magnetic properties of ultrafine Co<inf>3</inf>O<inf>4</inf> octahedra
Zhang, Hongzhou; Coey, John; Schmitt, Wolfgang; Venkatesan, Munuswamy (2015)Octahedral Co3O4 nanoparticles were synthesised in an aqueous ammonia solution using hexagonal β-Co(OH)2 nanoplates as starting materials. Electron microscopy analysis indicates that the Co3O4 particles have diameters of ...