A5055457569- Gold and Silver Nanoparticles Synthesis and Applications
- Near-Field Optical Microscopy
- Plasmonic and Surface Plasmon Research
- Force Microscopy Techniques and Applications
- Advanced Nanomaterials in Catalysis
- Industrial Vision Systems and Defect Detection
- Advanced Fiber Optic Sensors
- Microplastics and Plastic Pollution
- Carbon and Quantum Dots Applications
- Advanced Neural Network Applications
- Electrochemical sensors and biosensors
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Nanocluster Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- Nanopore and Nanochannel Transport Studies
- Spectroscopy Techniques in Biomedical and Chemical Research
University of Newcastle Australia
2019-2025
This article presents a proof-of-concept for new imaging method that combines tip-enhanced Raman spectroscopy with intermittent-contact atomic force microscopy to provide simultaneous nanometer-scale mechanical chemical contrast. The foremost difference from standard microscope is the illumination, which modulated by cantilever drive signal so illumination only active when tip close surface. approach significantly reduces contact forces and thermal damage due constant while simultaneously...
Nanoceria has evolved as a promising nanomaterial due to its unique enzyme-like properties, including excellent oxidase mimetic activity, which significantly increases in the presence of fluoride ions. However, this significant increase activity never been utilised signal enhancer for detection biological analytes partly because lack understanding mechanism involved process. In study, we show that surface oxidation state cerium ions plays very crucial role different enzymatic activities,...
Cerium oxide nanoparticles (CeNPs) exhibit excellent in vitro and vivo antioxidant properties, determined by the redox switching of surface cerium ions between their two oxidation states (Ce3+ Ce4+). It is known that ligands such as triethyl phosphite (TEP) can tune behavior CeNPs change biological enzyme-mimetic activities; however, corresponding mechanism for a completely unknown. Herein, we have studied effect TEP promoting SOD-enzyme-like activity with high low Ce3+/Ce4+ ratio, which...
Abstract In this article, boundary element method simulations are used to optimise the geometry of silver and gold nanocone probes maximise localised electric field enhancement tune near‐field resonance wavelength. These objectives expected sensitivity tip‐enhanced Raman microscopes. Similar studies have limited parameter sets or a performance metric other than enhancement. optical responses for range geometries simulated excitation wavelengths ranging from 400 1000 nm. Performance is...
This Article describes a method for the characterization of imaging performance tip-enhanced Raman spectroscopy probes. The proposed identifies single-walled carbon nanotubes that are suitable as one-dimensional scattering objects by using atomic force microscope maps and exciting radial breathing mode 785 nm illumination. High-resolution cross sections collected, point spread functions calculated along with optical contrast spot diameter. is used to characterize several probes, which...
Abstract Microcantilever probes for tip‐enhanced Raman spectroscopy (TERS) have a grainy metal coating that may exhibit multiple plasmon hotspots near the tip apex, which compromise spatial resolution and introduce imaging artefacts. It is also possible optical hotspot not occur at mechanical introduces an offset between TERS atomic force microscope maps. In this article, gold nanocone probe designed fabricated 638 nm excitation. The performance compared to by analysing high‐resolution...
Supercontinua generated in microstructured optical fibre are now used widely. The detailed spectral and temporal behaviour arising from the processes causing extreme broadening remains of interest particularly where users require stability for specific visible wavelengths by a supercontinuum source. theoretical gravity-like potential model requires NIR Raman self-frequency shifted solitons anomalous dispersion region to be phase matched with short wavelength dispersive waves travelling...