Controlled synthesis of hierarchical vertical graphene structures

Supervisor: Dr Zhaojun Han and Scientia Prof Rose Amal


Vertical graphene (VG) are few-layer graphene flakes oriented perpendicularly to the electrode surface. Compared with stacks of horizontal graphene made in the conventional chemical methods, VG is produced by plasma-based approaches and show unique features such as vertical orientation, non-agglomerated three-dimensional inter-networked morphology, controlled inter-sheet connectivity, and exposed ultra-thin and ultra-long edges [Chemical Society Reviews 44, 2108 (2015)]. As such, a range of applications have been identified for VG, including supercapacitors, batteries, solar cells, sensors, catalysis and water treatment.

Vertical Graphene taken from Chem. Soc. Rev., 2015, 44, 2108-2121

Recently, our group has developed a new form of VG, where smaller graphene flakes emanating from the original graphene nanosheets to form a hierarchical branched structure. The project will be built on this advancement to further tailor the structure and properties of hierarchical vertical graphene, including height, density, electrical conductivity, doping and degree of branching, by tuning a number of process parameters such as plasma power, gas flow rate, precursor pressure, and growth time. The project will be conducted at both UNSW and CSIRO at Lindfield. The expected outcome is to establish a set of hierarchical VG structures that could match to the requirements of different applications.

Suitable for: Chemical Engineer

Level of difficulty: Average

For more information, please contact Dr Zhaojun Han (