Browsing Chemistry (Scholarly Publications) by Author "Zhang, Hongzhou"
Now showing items 1-6 of 6
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Defect sizing, separation, and substrate effects in ion-irradiated monolayer two-dimensional materials
Duesberg, Georg; Mc Evoy, Niall; Zhang, Hongzhou (2018) -
Defect-moderated oxidative etching of MoS<inf>2</inf>
Zhang, Hongzhou (2019)We report a simple technique for the selective etching of bilayer and monolayer MoS 2. In this work, chosen regions of MoS 2 were activated for oxygen adsorption and reaction by the application of low doses of He + at 30 ... -
Enhancing capacitance behaviour of CoOOH nanostructures using transition metal dopants by ambient oxidation
Zhang, Hongzhou; Schmitt, Wolfgang; Maguire, Pierce (2016)Cobalt hydrate and doped binary Co0.9M0.1OOH (M = Ni, Mn, Fe) nanorings of 100-300 nm were fabricated in solution through a facile ambient oxidation method. A transformation from Co0.9Ni0.1(OH)2 nanodiscs to hollow ... -
Helium ion microscope generated nitrogen-vacancy centres in type Ib diamond
Zhang, Hongzhou; Mc Closkey, David; Duesberg, Georg; Donegan, John; Mc Evoy, Niall; Cross, Graham (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 ... -
Helium ion microscopy of graphene: Beam damage, image quality and edge contrast
Zhang, Hongzhou; Coleman, Jonathan; Donegan, John (2013)A study to analyse beam damage, image quality and edge contrast in the helium ion microscope (HIM) has been undertaken. The sample investigated was graphene. Raman spectroscopy was used to quantify the disorder that can ... -
Oxide-mediated recovery of field-effect mobility in plasma-treated MoS<inf>2</inf>
Nicolosi, Valeria; Mc Guinness, Cormac; Zhang, Hongzhou; Bradley, Louise (2018)Precise tunability of electronic properties of two-dimensional (2D) nanomaterials is a key goal of current research in this field of materials science. Chemical modification of layered transition metal dichalcogenides leads ...