A5071469712- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Copper-based nanomaterials and applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Biosensors and Analytical Detection
- TiO2 Photocatalysis and Solar Cells
- Transition Metal Oxide Nanomaterials
- Anodic Oxide Films and Nanostructures
- Thin-Film Transistor Technologies
- Optical Coatings and Gratings
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Sensor and Energy Harvesting Materials
- Nanoporous metals and alloys
- Spectroscopy and Chemometric Analyses
- Quantum Dots Synthesis And Properties
- Semiconductor materials and devices
- Adhesion, Friction, and Surface Interactions
- Advanced Biosensing Techniques and Applications
- Surface Roughness and Optical Measurements
- Advanced biosensing and bioanalysis techniques
- Silicon and Solar Cell Technologies
- Laser-Ablation Synthesis of Nanoparticles
- Plasmonic and Surface Plasmon Research
- Plant Growth and Agriculture Techniques
- Plant-Microbe Interactions and Immunity
Srinakharinwirot University
2011-2024
National Electronics and Computer Technology Center
2011
King Mongkut's University of Technology Thonburi
2010
We investigate the film-growth process of inhomogeneous sputtered TiO2 thin films by in situ real-time spectroscopic ellipsometer. The growth film is analyzed both uniform and island models. Based on analyses from Ψ-Δ trajectories, initial thin-film corresponds to model for a single-layer film. As grows, microstructural phase changes cause transition single-to double-layer physical model, because development inhomogeneity dynamic fits with Cody–Lorentz optical indicate three different stages...
This study investigated the combined effects of novel plant growth-promoting rhizobacteria (PGPR)—Agrobacterium pusense NC2, Kosakonia oryzae WN104, and Phytobacter sp. WL65—and Ascophyllum nodosum seaweed extract (ANE) as biostimulants (PGPR-ANE) on rice growth, yield, rhizosphere bacterial communities using RD79 cultivar. The significantly enhanced shoot root length, seedling vigour; however, seed germination was not affected. In pot experiments, biostimulant application increased richness...
TiO 2 thin films were deposited on unheated silicon wafers (100) and glass slides by a pulsed DC reactive magnetron sputtering in an ultrahigh vacuum (UHV) system. The effects of both operating pressure deposition time film structure, surface morphology, optical property studied. structure microstructure characterized grazing‐incidence X‐ray diffraction (GIXRD) technique transmission electron microscopy (TEM). morphology was investigated field emission scanning (FE‐SEM). the determined...
In order to increase agricultural productivity, several countries heavily rely on deadly insecticides, known be toxic most living organisms and thus significantly affect the food chain. The obvious impact is human beings who come into contact, or even consume, pesticide-exposed crops. This work hence focused an alternative method for insecticide detection at trace concentration under field tests. We proposed a compact Raman spectroscopy system, which consisted of portable spectroscope,...
The affordable surface-enhanced Raman scattering (SERS) substrates, with a structure consisting of densely distributed round-shape silver nanoclusters on anodic aluminum oxide (AAO) template, is fabricated by magnetron sputtering and anodization processes. physical investigations show that the size distribution ranging from 10 to 30 nm uniformly top in bottom AAO nanochannels. SERS activities adsorbed probe molecules, i.e., methylene blue, substrate surface indicate high enhancement factor...
According to the growing interest in development of high-sensitivity surface-enhanced Raman scattering (SERS) substrates, this study focused on fabrication silver nanorods (AgNRs) based DC magnetron sputtering, with glancing-angle deposition (GLAD) technique. The influence incident angles film morphologies and SERS activities deposited films were investigated by field-emission scanning electron microscopy (FE-SEM) spectroscopy. With methylene blue as test agent, vertical aligned proved...
ZnO nanorods were synthesized on silicon wafer substrate with a seed zinc layer using the aqueous solution method. The influence of various precursor compositions morphology nanorods, angles at 0° and 90°, was investigated. ratios hexamethylenetetramine in nitrate hexahydrate used as precursors synthesis ZnO. Scanning electron micrography indicated that growth angle smaller than 90° angle. is defined between plane horizontal an solution. When concentration not equal to ratio corresponding...
Zinc oxide (ZnO) nanorods (NRs) promise high potentials in several applications, such as photovoltaic device, thermoelectric sensor and solar cell. In this research, the vertical alignment of ZnO NRs was fabricated by hydrothermal method with various precursor concentrations growth time on different seed layers (ZnO Au), which deposited silicon wafer substrate (100). The crystalline structure morphology have been characterized x-ray diffraction (XRD) field emission scanning electron...
This work involved comparing Raman signals obtained from two different spectroscopy configurations, using distinct noise reduction methods. The excitation light source was a laser diode with wavelength of 532 nm. A long-pass filter and focusing lens were utilized to block the excited concentrate due their weaker nature compared signals. Light nm blocked during green illumination filter. Two configurations studied: transmission (TRS) reflection (RRS). both compared, boxcar averaging Vancouver...
Nanostructure silver films were obtained by dc magnetron sputtering at room temperature. The influences of deposition time on the morphology and optical properties studied field-emission scanning electron microscope UV-vis NIR spectrophotometer. It was found that nanostructure film can be effect surface morphology. enhanced Raman scattering activities Ag demonstrated methylene blue (MB) as probing molecules while detection limit MB to low 10 -5 M from this SERS substrate.
The ZnO nanorods were fabricated on top of the seeded gold layer by aqueous solution method with zinc nitrate and hexamethylenetetramine (HTMA) at 90°C for 24 hours. variety prepared investigated based precursor concentrations, in a range 1 to 40 mM. physical morphologies crystal structures characterized field-emission scanning electron microscopy (FE-SEM) X-ray diffractometry (XRD), respectively. results showed that, small lateral growth was highly significant when compared their axial...