A5074925915- Electronic and Structural Properties of Oxides
- Advanced Memory and Neural Computing
- Semiconductor materials and devices
- Force Microscopy Techniques and Applications
- Nanoparticle-Based Drug Delivery
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Nanofabrication and Lithography Techniques
- Mass Spectrometry Techniques and Applications
- Photoreceptor and optogenetics research
- Protein Interaction Studies and Fluorescence Analysis
- Gold and Silver Nanoparticles Synthesis and Applications
- Polymer Surface Interaction Studies
- Magnetic and transport properties of perovskites and related materials
- Molecular Junctions and Nanostructures
- Catalytic Processes in Materials Science
- Graphene and Nanomaterials Applications
- Perovskite Materials and Applications
- Insect Pheromone Research and Control
- Advanced Chemical Sensor Technologies
- Transition Metal Oxide Nanomaterials
- Nanocluster Synthesis and Applications
- Advanced Condensed Matter Physics
- Nanoparticles: synthesis and applications
- Analytical Chemistry and Chromatography
National University of Singapore
2015-2021
Duke-NUS Medical School
2018
Institute of Bioengineering and Nanotechnology
2016
Copper oxides have been of considerable interest as electrocatalysts for CO2 reduction (CO2R) in aqueous electrolytes. However, their role an active catalyst reducing the required overpotential and improving selectivity reaction compared with that polycrystalline copper remains controversial. Here, we introduce use selected-ion flow tube mass spectrometry, concert chronopotentiometry, situ Raman spectroscopy, computational modeling, to investigate CO2R on Cu2O nanoneedles, nanocrystals,...
Our study shows that the surface energy of all 2D layered materials is undoubtedly dominated by London–van der Waals forces with little contribution from dipole–dipole interactions.
In recent years, there has been an extensive search for a non-invasive screening technique early detection of lung cancer. Volatile organic compound (VOC) analysis in exhaled breath is one such promising technique. This approach based on the fact that tumor growth accompanied by unique oncogenesis, leading to detectable changes VOC emitting profile. Here, we conducted comprehensive profiling VOCs and metabolites from six different cancer cell lines normal line using mass spectrometry. The...
At the nano–bio interface, human plasma differentially interacts with engineered nanomaterials through creation of protein coronas, which in turn become primary determinants both pharmacokinetics and pharmacodynamics circulating nanoparticles. Here, for first time, specific binding kinetics four major corona forming proteins (human serum albumin, fibrinogen, ApoA1, polyclonal IgG) are determined gold nanoparticles (AuNPs). Using a multiplexed surface plasmonic assay, highly reproducible...
Herein, we report a systematic study of water contact angle (WCA) rare-earth oxide thin-films.
The effect of oxygen vacancy on water wettability different oxide surfaces are studied and type interface interaction is found in 3d 4f based surfaces..
In this manuscript, we demonstrate a method based on atomic force microscopy which enables local probing of surface wettability. The maximum pull-off force, obtained from spectroscopy shows remarkable correlation with the macroscopically observed water contact angle, measured over wide variety surfaces starting hydrophilic, all way through to hydrophobic ones. This relationship, consequently, facilitates establishment universal behaviour. adhesion forces scale polar component energy....
Abstract: Carbon nanotubes’ (CNTs) hollow interior space has been explored for biomedical applications, such as drug repository against undesirable inactivation. To further devise CNTs smart material controlled release of cargo molecules, we propose the concept “gold-carbon nanobottles”. After encapsulating cis-diammineplatinum(II) dichloride (cisplatin, CDDP) in CNTs, covalently attached gold nanoparticles (AuNPs) at open-tips via different cleavable linkages, namely hydrazine, ester, and...
Abstract We report the observation of spatially separated Kondo scattering and ferromagnetism in anatase Ta 0.06 Ti 0.94 O 2 thin films as a function thickness (10–200 nm). The behavior observed thicker is suppressed on decreasing vanishes below ~25 nm. In 200 nm film, transport data could be fitted to renormalization group theory for though carrier density this system lower by two orders magnitude, magnetic entity concentration larger similar magnitude there strong electronic correlation...
Abstract Here, we report the presence of defect-related states with magnetic degrees freedom in crystals LaAlO 3 and several other rare-earth based perovskite oxides using inelastic light scattering (Raman spectroscopy) at low temperatures applied fields up to 9 T. Some these are about 140 meV above valence band maximum while others mid-gap 2.3 eV. No impurity could be detected by Proton-Induced X-ray Emission Spectroscopy. We, therefore, attribute angular momentum-like cationic/anionic...
With the rise in nosocomial infections worldwide, research on materials with an intrinsic ability to inhibit biofilm formation has been generating a great deal of interest. In present work, we describe how thin film material libraries generated by pulsed laser deposition can be used for simultaneously screening several novel metal oxide mixtures that common human pathogen, Salmonella enterica serovar Typhimurium. We discovered library constructed using two oxides, net effect modeled as...
Abstract Strongly correlated electronic systems such as Transition Metal Oxides often possess various mid-gap states originating from intrinsic defects in these materials. In this paper, we investigate an extremely sharp Photoluminescence (PL) transition defect two widely used perovskites, LaAlO 3 and SrTiO . A detailed study of the PL a function temperature magnetic field has been conducted to understand behavior origin involved. The dependence peak position for is observed be opposite that...
Biofriendly recycling of Pt is enabled by ligands that size-selectively dissolve nanoclusters.
Abstract In this study we report the existence of novel ultraviolet (UV) and blue emission in rare-earth based perovskite NdGaO 3 (NGO) systematic quench NGO photoluminescence (PL) by Ce doping. Study room temperature PL was performed both single-crystal polycrystalline (substrates pellets) respectively. Several pellets were prepared with varying concentration their studied using 325 nm laser. It found that intensity shows a increasing concentration. XPS measurements indicated nearly 50%...
For a biosensing platform to have clinical relevance in point-of-care (POC) settings, assay sensitivity, reproducibility, and ability reliably monitor analytes against the background of human serum are crucial. Nanoimprinting lithography (NIL) was used fabricate, at low cost, sensing areas as large 1.5 mm x mm. The surface made high-fidelity arrays nanoholes, each with an area about 140 nm2. great reproducibility NIL it possible employ one-chip, one-measurement strategy on 12 individually...