A5057045619- Advanced biosensing and bioanalysis techniques
- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- Biosensors and Analytical Detection
- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Supercapacitor Materials and Fabrication
- Analytical Chemistry and Sensors
- SARS-CoV-2 detection and testing
- Molecular Junctions and Nanostructures
- DNA and Nucleic Acid Chemistry
- Fuel Cells and Related Materials
- Microbial Fuel Cells and Bioremediation
- Tissue Engineering and Regenerative Medicine
- Electrocatalysts for Energy Conversion
- Dielectric materials and actuators
- Electrospun Nanofibers in Biomedical Applications
- Molecular Biology Techniques and Applications
- ICT in Developing Communities
- Nanomaterials and Printing Technologies
- Polyoxometalates: Synthesis and Applications
- Sulfur Compounds in Biology
- Quantum-Dot Cellular Automata
- Alzheimer's disease research and treatments
- Extracellular vesicles in disease
MacDiarmid Institute for Advanced Materials and Nanotechnology
2016-2025
Victoria University of Wellington
2021-2025
University of Auckland
2014-2025
We report a strategy enabling ultrasensitive colorimetric detection of 17β-estradiol (E2) in water and urine samples using DNA aptamer-coated gold nanoparticles (AuNPs). Starting from an established sensor format where aggregation is triggered when target-bound aptamers dissociate AuNP surfaces, we demonstrated that step-change improvements are easily accessible through deletion excess flanking nucleotides aptamer sequences. After evaluating the lowest energy two-dimensional configuration...
Abstract The laser‐induced graphene (LIG) has a great potential in electrochemically active electrodes for wearable biosensors. Herein, the first time, stretchable and non‐enzymatic glucose sensor based on LIG derived from commercial poly(ether sulfone) (PES) membranes is reported. situ transferred onto an elastomer tightly wrapped by one laser carbonization step. Superior to conventional casting demolding transfer process, this method avoids LIG's morphology distortion loss. By adjusting...
A stretchable and self-healable PEDOT-based conducting polymer was developed for a flexible wearable supercapacitor. The supercapacitor provides excellent capacitance, cycling stability self-healing properties.
Synthetic DNA aptamer receptors could boost the prospects of carbon nanotube (CNT)-based electronic biosensors if signal transduction can be understood and engineered. Here, we report CNT aptasensors for potassium ions that clearly demonstrate aptamer-induced electrostatic gating conduction. The network devices were fabricated on flexible substrates via a facile solution processing route non-covalently functionalised with binding aptamers. Monotonic increases in conduction observed response...
Herein, a novel and simple electrospray (ES) printing technique was developed for the fabrication of ultrathin graphene layers with precisely controlled nanometer-scale thickness, where oxide (GO) electrosprayed on wafers subsequently chemically reduced into GO (rGO). Utilizing that technique, we prepared rGO in-plane field-effect transistor (GFET)-based biosensors coupled portable prototype measuring system point-of-care detection pathogens. We illustrate use such GFETs to detect COVID-19,...
A flexible supercapacitor based on polyluminol-polyoxometalate hybrid hydrogel electrodes is fabricated with excellent capacitance retention over 1000 charge–discharge cycles and outstanding performance stability upon significant bending deformation.
A rapid, selective and sensitive, novel conducting-polymer sensing platform for the detection analysis of biothiols.
β-Secretase, the β-site amyloid precursor protein (APP) cleaving enzyme 1 (BACE1), is a key hydrolytic in pathway of β-amyloid (Aβ) production brain patient with Alzheimer's disease (AD). BACE1 considered promising biomarker for early detection AD. A ferrocene probe (Fc-Probe) synthesized, where aldehyde group on can specifically recognize N terminus APP peptide fragment. The sensor's design involves gold nanoparticles (AuNPs) glassy carbon electrode (GCE) surface, which allows binding When...
Electrochemical techniques offer great opportunities for the capture of chemical and biological entities from complex mixtures their subsequent release into clean buffers analysis. Such methods are clean, robust, rapid, compatible with a wide range fluids. Here, we designed an electrochemically addressable system, based on conducting terpolymer [P(EDOT-co-EDOTSAc-co-EDOTEG)] coated onto carbon cloth substrate, to selectively using simple electrochemical redox process. The composition was...
An approach to transience in polymer electronic materials featuring varying lengths of conductive oligo 3-hexylthiophene (O3HT) grafted, at different densities, onto a degradable polycaprolactone (PCL) backbone was demonstrated.
In this communication, a label-free and sensitive electrochemical method to detect potassium ions is proposed. The conducting polymer polypyrrole was used as both an anchor for the probe transducer of detection event. A K(+)-specific G-rich aptamer applied recognition element, which folded into G-quadruplex structure in presence K(+), resulted increase electrode impedance. combination K(+)-selective porous signal afforded successful sensor platform. responded approximately logarithmically...
In this communication, we present an in-depth study of DNA/DNA, DNA/PNA and PNA/PNA hybridisation on a conducting polymer-modified electrode, measured by means electrochemical impedance spectroscopy (EIS). DNA or PNA nucleic base sequence probes (where stands for deoxyribonucleic acid peptide acid) were covalently attached onto the sensor surface. As is non-charged variant DNA, investigate effects surface charge blocking confined probe/target bases complexes kinetics redox reaction...
Abstract Electrically driven actuators have found widespread applications in biomimetics and soft robotics. Among different actuation materials, conducting polymers (CPs) stood out due to their unique doping‐based mechanism. Fabricating at the microscale is particularly important, not only manufacturing of delicate biomimetic/robotic devices but also advanced microphysiological studies. However, choice for microfabrication techniques limited, with reported CP microactuators being mainly...
Biomass resources offer a diverse array of low-cost feedstocks for the manufacture electrocatalysts energy sector. In this study, haemoglobin (Hb), lignin, tannic acid and urea were used to develop FeSN/C comprising iron highly dispersed on S,N-codoped carbon oxygen reduction reaction (ORR). By pyrolyzing precursor mixtures containing Hb, in appropriate mass ratios, carbons with Fe sites obtained ORR performance superior Pt/C. The developed electrocatalyst exhibited an onset potential 0.98 V...
Abstract Wearable and implantable devices play a crucial role in clinical diagnosis, disease treatment, fundamental research on the body's electrophysiology biochemical processes. Conducting polymers are emerging as promising solutions to surpass limitations of traditional metal‐based electrodes, offering enhanced conformability, stretchability. However, current microfabrication techniques CP electrodes have number limitations. In this study, novel wet‐printing technique is developed for...
In the field of contemporary epidermal bioelectronics, there is a demand for energy supplies that are safe, lightweight, flexible and robust. this work, double-network polymer hydrogels were synthesized by polymerization 3,4-ethylenedioxythiophene (EDOT) into poly(vinyl alcohol)/poly(ethylene glycol diacrylate) (PVA/PEGDA) hydrogel matrix. The PEDOT-PVA/PEGDA shows both excellent mechanical electrochemical performance, having strain up to 498%, electrical conductivity as high 5 S m