Leelawattananon, Tanaporn
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Preferred name
Leelawattananon, Tanaporn
Alternative Name
Leelawattananon, Thanaporn
Main Affiliation
Email
tanaporn.le@kmitl.ac.th
11 results
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Item type:Publication, Simulation of copper thin film thickness optimization for surface plasmon using the finite element method(2017-01-01); ; Chittayasothorn, SuphamitThis paper presents a computer simulation of optical activations based on the Kretschmann configuration using a prism for the observation of the surface plasmon wave. This is according to the condition of the dispersion relation. The analysis of the electric field of the surface plasmon wave which appears at the interface between the metal layer and the air layer is done by using the Finite Element Method (FEM). The simulation is performed using the COMSOL Multiphysics software which supports the FEM. The objective of our experiment is to find the most suitable thickness of the metal thin film which is most suitable for the surface plasmon excitation when activated by 632.5 nm red laser light source. The red laser light source is commonly available and also very economical. The metal used in our work is copper which is an economical noble metal and gives better conductivity than gold. The findings from the simulation will be used in the future high precision physical experiments. The outcome of this research project, the surface plasmon wave on copper thin film, is expected to be used in bio-molecular detectors or high speed THz communications. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Silver thin film and water dielectric SPR sensor experimental and simulation characteristics(2019-01-01); Chittayasothorn, SuphamitThis research project is the study of the Surface Plasmon Resonance (SPR) at the interface between silver thin film and the water dielectric layer. The purpose is to find the suitable thickness of the silver thin film layer which produces SPR and is suitable for SPR sensor applications. Both physical experiments and simulations are conducted using the Kretschmann Configuration. In the physical experiments, BK7 prisms are coated with silver thin films with the thickness of 60Â nm, 80Â nm, and 100Â nm. The light source is p-polarized He-Ne Laser with the wavelength of 632.8Â nm. Hawkeye laser detectors are used to detect the laser light intensity of reflected light for each desired angle. In the simulations, results of SPR signals are analyzed using the finite element method. The simulated results are found to agree with the results from the physical experiments. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A student-oriented physics e-tutorial system(2005-07-01); Chittayasothorn, SuphamitE-tutorial systems recently played important roles in the teaching and learning of both online and conventional courses. Students have opportunities to study and practice exercises under guidance of the systems. A challenge in the development of e-tutorial systems is the design and implementation of the student guidance system. The guidance system should take into consideration the ability of individual students and give appropriate questions according to the student's ability. The students should finally reach the solution and gain better understanding of the learning topic. This paper presents the student guidance system of ESBO, a knowledge-based Physics e-tutorial system. This system considers individual student's ability in a different approach from other existing systems. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simulation effects on the optical response of gold nanoparticles(2019-01-01); Chittayasothorn, SuphamitIn this research work, we use simulation models for the investigation of the sizes and shapes of gold nanoparticles on BK-7 substrate base, which affect the optical characteristics in a large spectral range of the gold nanoparticles. Linearly polarized light with wavelengths of 300 – 800 nm are specified as the impact light on gold nanostructures. We try to find the suitable wavelength of the impact light when localized surface plasmon resonance takes place. The gold nanoparticles are spherical, elliptical oval, and 10nm x 40 nm block-shape and have their aspect ratio similar to the nanorod shape nanoparticles used in other experiments. The results are useful for the development of plasmonic complex nanostructure with tunable surface plasmon resonances which generate heat and have potential applications in medical thermal therapy. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Antitumor activities of carboplatin–doxorubicin–ZnO complexes in different human cancer cell lines (breast, cervix uteri, colon, liver and oral) under UV exposition(2021-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A Mobile Application for Electronic Parts Counting and Identification in Physics Laboratory(2025-01-01); Chittayasothorn, SuphamitCounting of small objects such as resistors, capacitors, and inductors in physics laboratories are tedious and challenging tasks because of their numbers and small size. In this paper we present the development of a mobile application for counting and identifying small electronics parts. The system employs object edges detection using the difference of gaussian operator and classify the objects using template matching. Pictures taken using mobile phone camera are used as the input to the mobile application which correctly classify and count the objects. Electronics objects used in the counting and classification include resistors, mylar capacitors, and ceramic capacitors. The mobile application helps reduce the work required by laboratory personnel for intermediate physics laboratory management and is now deployed in the physics laboratory of the School of Science, King Mongkut's Institute of Technology Ladkrabang. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Electronic Parts Counting in Physics Laboratory Using Difference of Gaussians Edge Extraction(2024-01-01); Chittayasothorn, SuphamitSmall electronic parts counting in the physics laboratory is a challenging task. These small objects such as resistors, capacitors, and inductors are used in physics laboratories and because of their numbers and small size, are hard to count in a short period of time. The precise inventory of these small electronics parts is therefore compromised. In this paper we present the development of a small electronics parts counting system. The system employs object edges detection using the difference of gaussian operator. This technique is suitable for those small electronic objects which have clear boundaries. By adjusting relevant parameters sigma and threshold to suit the size of the objects, the edge images are clearly detected thus enable correct counting of the objects which leads to correct inventory of electronics parts. An alternative technique using the canny edge detector operator is also used as a comparison technique. The experimental results are precise. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Surface Roughness Measurement Application Using Multi-frame Techniques(2016-01-04); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A prototype full duplex data transfer system based on red laser pointer module(2016-01-01); Chittayasothorn, SuphamitThis research work presents the development of a prototype short distance, full duplex data transfer system using red pointer module as the light transmitter and PIN photodiode as the receiver. The system is low cost, stable, and has low power consumption.) This data transfer unit is connected to a computer system using the Prolific USB-to-Serial Com Port chipset which also uses the computer as its power source. The unit is used for data transfers between two nearby computer systems or peripheral devices. In this work, a data transfer program is developed. The program was written in the visual C# language. It is convenient to specify the COM port and the appropriate bit rates. Data transfers of both text and graphical data are tested and results are discussed; both with and without moving object interferences. This data transfer unit has the potential for applications in EMI-sensitive environments and moving objects interferences. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simulation of Surface Plasmon Waves Based on Kretschmann Configuration Using the Finite Element Method(2019-01-01); Chittayasothorn, SuphamitThis paper presents the simulation of optically activated surface plasmon waves based on Kretschmann configuration by using prism. Simulated electric fields of the surface plasmon wave which appears at the interface between the metal thin film and dielectric layer are observed. The occurences of surface plasmon wave can be applied to biomolecular sensing and high speed data communications at the THz level. The simulations employ the finite element method (FEM). The light source is the 632.5 nm red laser which is economical and easy to obtained commercially. Two simulation models are conducted. The first simulation model employs copper thin film on the prism and air as the dielectric layer. This one is intended to find the most suitable copper thin film thickness to produce surface plasmon waves. Copper thin film is used because it is a noble metal which is less expensive than gold but has better conductivity than gold. The second simulation model employs silver, another noble metal which is also less expensive than gold. Silver thin film on prism together with magnesium chloride solution as dielectric layer are simulated. Concentrations of the magnesium chloride solution are varied to find the one which produces good surface plasmon wave pattern. Thus suitable to be used as sensors for biomoleculars such as DNAs.