Scientific Publications

Highlights Small amounts of water can considerably alter reactivity at graphene foam electrode | ionic liquid interfaces Redox probes such as FeCp2+/0 or Fe3+/2+ in BMIM+BF4– are affected by humidity increasing diffusion rates. However, on graphene foam electrode surfaces with approx. 40 μm depth, both types of redox probes show voltammetric features associated with diffusional trapping within […]

Highlights This work presents the electrosynthesis of a photoactive TiO2 pohase on Gii without the need for thermal annealing. Approximately 2.1x the value for traditional carbon-based printed electrodes was achieved by using Gii instead of a carbon-based electrode. Abstract We discuss the photoelectroanalytical performance of a brookite-phase titanium dioxide (TiO2) platform electrodeposited onto graphene foam […]

Highlights Electrodeposition of iron oxyhydroxide (FeOOH) onto carbon substrates based on acetate precursors was demonstrated. This Gii electrode outperformed the more established iron chloride deposition. Cycling stability of the fuel cell is reasonable at 70% retention at 5000 cycles. Abstract Electrochemical capacitors based on redox active materials can achieve greater capacitance values than traditional electric […]

Highlights Gii has high detectivity, low-cost and mass-producibility properties that could improve broadband photodetectors. Gii outperforms existing materials in terms of detection performance, while also being a low-cost, sustainable, supply-secure and commercially scalable material. Gii-powered broadband photodetectors could eliminate the cost of and space for using multiple sensing materials and ultimately offer faster fibre optic […]

Highlights Gii-Sens has shown to be ideal electrodes for glucose biosensors. Glucose sensitivity of 22.7 μA/mM/cm^2 shows promise for metal-free sensors. The observable biocatalytic response from the electrodes, prepared through simple drop-casting methods onto commercially available 3D graphene foams, represents a promising first step to the development of metal-free biocatalytic devices based on this setup […]

Highlights The Adsorption of a pyrene-appended receptor molecule onto Gii causes significant capacitance changes (when positively charged pyridinium group is attached close to the Gii surface). Gii provides a great platform for sensing mechanism based on capacitance changes. The use of quantum capacitance in sensing can open new opportunities in wireless sensing but more in-depth […]

Highlights This label-free electrochemical immunosensor based on Gii-Sens uses the bioreceptor (mAb-cort) and analyte (cortisol) in their natural forms without any modification to study their biomolecular interaction with high affinity by decreasing non-specific adsorption. Some salient features of the proposed graphene-based (Gii) cortisol immunosensor are its simple fabrication, low cost, higher selectivity, reproducibility, and superior […]

Highlights Graphene foams (Gii) with electrodeposited birnessite MnO2 via current pulse achieved a maximum capacitance of 530 mF/cm2 at 10 mA/cm2 compared to 385 mF/cm2 for galvanostatic deposition and 240 mF/cm2 for cyclic voltammetry deposition at the same current density. Current pulse MnO2 electrode demonstrated better rate capability (61% capacitance retention switching from 0.5 to 20 mA/cm2) and cycling retention (93% after 5000 […]

Highlights Gii-Sens can help to move benchtop devices to point of care as required in the application of such assays given it’s low cost and reliable Abnormal blood lactate concentrations resulting from conditions such as sepsis can be difficult to identify and diagnose in critically ill patients. Therefore, reliable real-time lactate detection through single-point or […]