Tanakorn Osotchan

Tanakorn Osotchan
Mahidol University | MU · Department of Physics

Doctor of Philosophy

About

143
Publications
12,002
Reads
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1,755
Citations
Education
May 1990 - May 1995
Macquarie University
Field of study
  • Semiconductor Physics

Publications

Publications (143)
Article
Plasmonic microstructures have potential applications for surface-enhanced Raman scattering. Consistent microstructure features are crucial to ensure spatial reliability and accuracy of measurements. In this work, we assessed the performance of surface-enhanced Raman scattering using plasmonic self-assembled microstructures. The plasmonic microstru...
Article
A comparison between the physical characteristics of graphite ultrafine particles and the properties of graphite blocks prepared from graphite scrap using bead and conventional ball milling techniques is presented. Industrial-scale bead milling was used to prepare graphite scrap with an initial particle size d50 of 24 μm in the ultrafine range of <...
Article
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Formaldehyde is a toxic pollutant that harmful effect on human health. This work focus on the development of a colorimetric sensor to detect formaldehyde solution using composites of polydiacetylene (PDA), thiol-functionalized polydiacetylene (PDA-SH) and zinc oxide (ZnO) nanosheets. The as-prepared PDA/PDA-SH/ZnO vesicles exhibit a blue color, and...
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Electrolyte drink becomes very popular nowadays that drinking aid in rehydration which mostly contain water, sugar, and electrolytes (Na, K, Mg, Ca ions). In this work, several electrolyte drinks including M sport, M-plus, Sponsor, Sponsor citrus, Gatorade were analyzed by electronic tongue comparing to mineral and tap water. Non-specified electrod...
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Home healthcare medical technologies have been gaining popularity and are more affordable in recent years. Exhaled breath analysis has potential in this field. The development of gas sensor technology has enabled us to build a small affable breath analysis device with the electronic nose concept. In this work, a handheld breath analyzer was develop...
Article
Titanium dioxide (TiO2) inverse opal, a well-ordered nanoporous media, has a good potential in light-matter enhancement application. In this work, the fabricated TiO2 inverse opal structures were prepared by well-ordered template from convective deposition. This measured photonic bandgap was shorter in wavelength from the theoretical prediction of...
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Easy-to-use and on-site detection of dissolved ammonia are essential for managing aquatic ecosystems and aquaculture products since low levels of ammonia can cause serious health risks and harm aquatic life. This work demonstrates quantitative naked eye detection of dissolved ammonia based on polydiacetylene (PDA) sensors with machine learning clas...
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The preparation of cellulose-based flame retardant paper treated with sodium silicate and silicon dioxide (SiO 2 ) colloidal particle by simple immersion process is reported. Cellulose-based paper was preheated at 90°C for surface preparation. The heat treated paper was immersed in solution of sodium silicate-SiO 2 at different immersion time rangi...
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Optical diffraction of opal structure, a colloidal photonic crystal, can be predicted by Bragg-Snell diffraction and photonic band structure. Theoretical prediction and optical measurement are frequently slightly different due to distance variation of particle packing. In this research, opal of 310 nm polystyrene beads was fabricated by self-assemb...
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Experimental and simulation studies show that a hexagonal array of polystyrene particles on a gold substrate, capped with gold semi-shells, results in increased optical confinement of the resonance modes in comparison with those for arrays without metallic substrate or capping. Well-ordered arrays of polystyrene beads were fabricated by convective...
Article
Inverse opals, as ordered macroporous structures, are widely used due to their interesting optical response. The addition of metal oxide dopants increases their optical absorption. However, with heavy dopant concentrations, the doped inverse opal is affected by structural damage and higher solid volume fractions. In this work, the effect of dopant...
Article
In this work, classification of sweetness from different types of sugar using blended multiwall carbon nanotube paste electrode was demonstrated. The fabricated electrodes were used as working electrodes of multi-electrochemical sensors for sweetness classification. Multiwall carbon nanotube (MWCNT) was blended with modified materials including of...
Conference Paper
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X-ray photoelectron spectroscopy (XPS) is a surface-sensitive quantitative spectroscopic technique that measures the elemental composition, empirical formula, chemical state and electronic state of the elements. Moreover, XPS is also widely used in semiconductor applications as the main characterization technique. In this work, chromium and magnesi...
Article
Noncovalent functionalization of carbon nanotubes with metal phthalocyanine has great potential for sensor nanodevices, nevertheless, some aspects of their electron transport mechanism behind the sensing properties have not been understood yet. Here, we evaluate the sensing performance of metal phthalocyanine - carbon nanotube hybrids for acetone a...
Article
Copper ferrite (CuFe2O4) has been well known because of its interesting physical properties, and it has been used as a candidate for many applications such as Li-ion storage, gas sensors, catalysts, and magnetic devices. Copper ferrite (CuFe2O4) structure is of significant importance in the context of engineered materials and their structure develo...
Article
Electronic tongues are analytical electrochemical technique which mimic human tongue. The taste sensing system like an electronic tongue has been successfully used to distinguish five basic tastes and as quality analysing tool in food and beverages industries. In this study, the chemical electrodes with multiwall carbon nanotube were developed to c...
Article
Flower-like zinc oxide nanostructures have been successfully fabricated by various methods such as chemical vapor deposition, vapor phase transport deposition, thermal evaporation, hydrothermal, sol-gel and template growth methods. Zinc oxide doped with indium and gallium can demonstrate the potential utilization in electronic application for its s...
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The purpose of this study is to analyze the effectiveness of taste sensing system to predict the bitterness of six commercial pharmaceutical drugs including amoxicillin, paracetamol, phenylephrine, cetirizine, quinine, and ranitidine. The taste sensing system consists of Ag/AgCl as a reference electrode, platinum rod as a counter electrode and modi...
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A dielectric film imprinted with a hexagonal periodical pattern of nanosphere holes can be fabricated by a two-step process of depositing a dielectric thin film on a hexagonally patterned array of nanospheres fabricated by convective deposition, and then removing the nanosphere particles. In this work, the optical transmission through a dielectric...
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Polydiacetylene (PDA) is one of the well-known thermochromic materials having a high potential in applications such as displays and sensor technology. Many research groups have been working on controlling thermochromic reversibility of PDA-based materials. In this research, the colorimetric response of PDA assembled with indium or gallium doped zin...
Chapter
The photothermal therapy (PTT) has attracted the cancer treatment because it is non-invasive and relatively safe technique. The gold nanoparticles (AuNPs) have been a great source of interest due to its novel characteristics which make them suitable for the promising applications such as the photothermal therapy, drug delivery, nanomedicine, photon...
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In this present work, Fly ash was incorporated into natural rubber to form a natural rubber composite. The natural rubber composite was prepared by solution mixing method at the constant amount of fly ash at 80 phr. The fly ash particle was modified its surface by TESPT silane coupling agent before mixing with natural rubber latex. The surface morp...
Article
In this work, the effect of precipitating agent NaOH on the growth of SrTiO 3 blocking layer to serve as the charge recombination barrier for DSSC based TiO 2 were investigated. The SrTiO 3 /TiO 2 heterostructure was synthesized by the hydrothermal method. The structure and surface morphology of SrTiO 3 /TiO 2 heterostructure were carried out by SE...
Article
In this work, we report the in situ growth of gold nanoparticles (AuNPs) for the improvement of a transmission surface plasmon resonance (T-SPR) sensor to detect human immunoglobulin G (IgG). Human IgG was immobilized on an activated self-assembled monolayer of 11-mercaptoundecanoic on a gold-coated grating substrate. The T-SPR system was also used...
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Metal phthalocyanine (MPc) is a metal organic compound which can be formed with several metal atoms at the center. Although MPc has semiconductor property, in order to fabricate the selective electrode for cyclic voltammetry (CV) measurement, the other material with high electrical conductive materials is required to mix in order to achieve suffici...
Article
In this work, aluminum doped zinc oxide (AZO) ceramic targets were prepared from ZnO powder and Al2O3 powder with varying amounts of Al2O3 doped in a range of 1-5 wt%. The mixed ZnO and Al2O3 powders were pressed at a pressure of 80 MPa into disks and sintered at 1,300 ∘C for 5 h in air. The crystal structures of the sintered targets were character...
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The main objective of this study was to prepare bead milled-silica nanoparticles (SiO 2 ) as reinforcing materials for transparent hard coating films. SiO 2 dispersed in Dowanol PM without any stabilizer was used as a main component in the nanocomposite hard coating films to improve hardness of Poly methyl methacrylate (PMMA) sheets. However, the m...
Article
Adsorption of various metal-phthalocyanine (MPc) molecules on Al(100) substrate were investigated by using the Density functional Theory (DFT). There are six transition metal atoms substituted in phthalocyanine skeleton ranking from d ⁵ to d ¹⁰ of the 1 st row of transition metal and metal free phthalocyanine (H 2 Pc) molecule were studied. After a...
Article
A thick anodic aluminium oxide (AAO) was used as a laminated hard coating film on high-density polyethylene (HDPE) without a binder. This thick alumina surface has a large number of polymeric nanofibers rooting inside which makes it a composite between polymer fibre and alumina. The AAO-coated film was crystalline gamma-Al2O3 and its Vickers hardne...
Conference Paper
Full-text available
Stacks pattern of microspheres and nanoparticles can be deposited by layer-by-layer coating with several techniques. In this work, we fabricated two pattern monolayers of polystyrene microparticle by convective horizontal deposition. For initial layer, glass substrate was dragged with velocity of 25 μm/s and also applied horizontal vibration with f...
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The formation of polymeric materials can be achieved by several methods such as melting and casting, screw extrusion, cross-linking of resin or rubber in a mold, and so on. In this work, the polyacrylic acid is formed by using the emulsion disturbance method. Despite extensively used in the colour painting and coating industries, acrylic emulsion c...
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Wavelet analysis is an excellent technique for data processing analysis based on linear vector algebra since it has an ability to perform local analysis and is able to analyze an unspecific localized area of a large signal. In this work, the wavelet analysis of cyclic waveform was investigated in order to find the distinguishable feature from the c...
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Alumina, such as glazed alumina for electrical insulator, operated in an open field subjects to a very harsh condition; resulting in lifetime shortening. Coating hydrophobic layer on alumina surface can help prolonging its lifetime. In this study, 25 ×25 mm alumina sheets were used as substrates. The hydrophobic composite polymers were prepared fro...
Article
Polyhedral oligomeric silsesquioxane (POSS)-based materials, poly-POSS-Tn [n = 8 (1), 10 (2), 12 (3), and mix (4)], were prepared in high yields via free radical polymerization of corresponding pure forms of methacrylate-functionalized POSS monomers, MMA-POSS-Tn (n = 8, 10, 12), and the mixture form, MMA-POSS-Tmix. Powder X-ray diffraction (XRD) sp...
Conference Paper
Photonic crystal effect can be observed in regular pattern thin film and an efficient inexpensive thin film fabrication method, which be able to control number of monolayers, is convective self-assembly. In this work, the film was prepared by polystyrene nanoparticle with particle sizes of 930, 500 and 310 nm. The few monolayer films were coated by...
Article
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Epoxy adhesive used in electronic packaging could normally be cured by ultraviolet light, heat at high temperature or dual cured by both processes. Differential scanning calorimetry (DSC) has been used to identify and analyze the occurred reaction during the curing process. The structural modification of epoxy during curing could be examined by mea...
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Epoxy adhesive has been widely used in microelectronic production process and the technique to determine the degree of tiny dot adhesive cure is essential to evaluate the products. In this work, micro Raman spectra were demonstrated to examine the adhesive curing at small diameter of about hundred micrometers. There are two Raman peaks that can be...
Article
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The optical and mechanical properties of single layer nanocomposite films, with refractive indices (n) matched for an allyl diglycol carbonate (CR-39) substrate, with n = 1.50, were investigated. Alumina nanoparticles (ALO NPs 20 nm) and zirconia nanoparticles (ZrAc NPs 50 nm) in colloidal form were incorporated in the nanocomposites to improve fil...
Article
This work presents development of chemiresistor gas sensor based on polyaniline (PANi) blending with poly(methyl methacrylate) (PMMA) thin film for identification of volatile organic compounds (VOCs) relevant to environmental monitoring. The investigated VOCs are including acetone, methanol, ethanol and ammonia. The gas sensors are prepared by solu...
Article
The main objective of this work was to study the formation of abrasion resistance nanocomposite coating for teak wood that was fabricated from silicon dioxide nanoparticles (SNPs) and methyltrimethoxysilane (MTMS) via a sol–gel process. SNPs were used to enhance the abrasion resistance property, while MTMS acted as a matrix and rendered the flexibi...
Article
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Fast, cost effective, single-shot DNA sequencing could be the prelude of a new era in genetics. As DNA encodes the information for the production of proteins in all known living beings on Earth, determining the nucleobase sequences is the first and necessary step in that direction. Graphene-based nanopore devices hold great promise for next-generat...
Article
Impedance spectroscopy (IS) is a useful technique to investigate the detail of charge transfer in dye sensitized solar cell (DSSC) especially for individual part of cell component. The charge transport in electrolyte, platinum and TiO2 electrodes can be separately examined by varying the frequency range of IS. In this work, the TiO2 electrode was m...
Article
Electrochemical characteristic of blended multiwall carbon nanotube paste electrode (CNTPE) was investigated with five basic taste models. The multiwall carbon tube was blended with metal phthalcyanine (MPc) powders including of CoPc, FePc, MgPc, MnPc and ZnPc to produce modified working electrode. Solutions with concentration of 0.1 M of potassium...
Conference Paper
Full-text available
The phase shift on reflection from the colloidal photonic crystal film was measured by the Fabry-Pérot resonant cavity along the cross-section of the photonic crystal film without additional optical parts. The wet colloidal photonic crystal film was fabricated by dip-coating an agarose-gel-coated glass substrate into a suspension containing monodis...
Article
Photoresponse characteristic from efficient exciton dissociated heterojunction based on copper phthalocyanine (CuPc) and fullerene (C60) layers was observed the different spectrum responses under positive and negative biases. The nanostructures of CuPc and C60 thin films were fabricated between transparent indium tin oxide (ITO) and aluminum (Al) e...
Article
Atomic structures of fabricated Fe-Co alloys were investigated real time by time resolved x-ray absorption spectroscopy (TRXAS) at annealing temperature of 400° C. The various compositions of Fe-Co alloy thin films were prepared by electro-deposition on indium-tin oxide glass substrate with iron sulfate and cobalt chloride electrolyte solutions. Th...
Article
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Magnetic nanoparticles of cobalt- and nickel-iron oxide have been extensive interest due to their superparamagnetic properties and their potential applications in many fields. Iron, cobalt and nickel can stay in many oxidation states and are easily oxidized especially in ambient air therefore the composition and oxidation states of these oxides can...
Article
A quartz crystal microbalance (QCM) technique was used to reveal the effect of alkanethiol self-assembled monolayers (SAMs) on the viscoelastic property and cell adhesion process of cultured fibroblasts (L929), by measuring the change in frequency (∆f) and resistance (∆R). Four types of SAMs having different functional groups including hydroxyl (OH...
Article
Multilayer poly (3-hexylthiophene)-CNT/C60 thin films on ITO glass substrate was fabricated regarding to the function of each layer. Poly (3-hexylthiophene) (P3HT) is used as a donor layer and fullerene (C60) is used as an acceptor layer of the device. The carbon-nanotube (CNT) is homogeneously mixed in the donor layer to increase charge transporta...
Conference Paper
Teak wood is widely used for the housing interior and decoration because of its beautiful grains appearance; however, it often suffers from surface damage especially in the tiling application. The remedy is to apply a protective layer such as polyurethane (PU). In this work, the sol-gel inorganic reinforced hard coating formulation based on silicon...
Article
Silsesquioxane formation competing with the deprotonation of alcohol solvents in the presence of a strong base to form alkoxides is reported for the first time. Evidently, sodium isopropoxide is formed during the synthesis of the sodium salt of a double-decker octaphenylsilsesquioxane tetrasilanolate in 2-propanol as the solvent, which leads to the...
Article
Novel phthalimide and o-sulfobenzimide-functionalized silsesquioxanes were successfully synthesized via nucleophilic substitution reactions from octakis(3-chloropropyl)octasilsesquioxane. Surprisingly, the formation of deca- and dodecasilsesquioxanes cages was discovered during substitution with phthalimide, but only octasilsesquioxane maintained a...
Article
The formation of scratch-resistant coating film prepared from colloidal silica and a polysiloxane matrix was investigated. Methyltrimethoxysilane (MTMS) was hydrolysed and mixed with silica sol (SiO2) at various compositions to form the hybrid hard-coating nanocomposite film. The hydrolysed MTMS (polysiloxane) acts as the polymeric binder that is c...
Article
Microstructure of heterojunction usually has strong influence on its electrical characteristic. In order to study the effect of microstructure, the layers of copper phthalocyanine (CuPc) and tetracyanoquinodimethane (TCNQ) are deposited on indium tin oxide (ITO) coated glass substrate by thermal evaporation method. The modification of microstructur...
Article
Molecular interaction between zinc phthalocyanine (ZnPc) thin films and various oxidizing gas molecules was examined by measuring sensor response of chemiresistor structures. The different response types can be obtained from the interactions to gas molecules of nitrogen dioxide (NO2), sulfur dioxide (SO2) and carbon monoxide (CO). For NO2 interacti...
Article
A novel octakis(3-propyl ethanethioate)octasilsesquioxane was successfully synthesized via nucleophilic substitution on octakis(3-chloropropyl)octasilsesquioxane using potassium thioacetate in aprotic dimethylformamide as a solvent. Complete substitution proceeded at room temperature within a day to produce a crystalline product in high yield. The...
Article
A Monte Carlo approach is used to estimate hole mobilities in molecular β-copper phthalocyanine (CuPc) crystal for different applied electric field directions. Due to the crystal symmetry, the twelve neighboring molecules in the three-dimensional crystal are selected in the hopping rate calculation. Density functional theory is employed to derive t...
Article
Full-text available
A biosensor structure comprising silicon nitride (Si3N4) micrograting arrays coated with a spin-on-glass (SOG) material was investigated. This grating structure was located on a silicon groove, which was etched by a deep reactive ion etching (DRIE) process. The biosensor was used as a specific detector of DNA molecules and antibody--antigen interac...
Article
Be-doped InGaAs/AlGaAs multiple quantum well (MQW) structures, grown by solid-source molecular beam epitaxy with different doping concentration in the wells, were investigated by x-ray diffraction and transmission electron microscopy (TEM). Some features have been observed. (1) The MQW mean mismatch increases from 1.176×10-3 to 1.195×10-3 and 1.29×...
Article
In order to calculate optical properties i.e. dielectric function, refractive index and absorption coefficient, the evaluation of integration including ground and excited wavefunctions is required over entire k-space. The contour of energy dispersion was proposed to form the criteria to select and limit the value of k in the integration. With the c...
Article
A biosensor structure comprising silicon nitride (Si3N4) micrograting arrays coated with a spin-on-glass (SOG) material was investigated. This grating structure was located on a silicon groove, which was etched by a deep reactive ion etching (DRIE) process. The biosensor was used as a specific detector of DNA molecules and antibody–antigen interact...
Article
UV/vis absorption and photoluminescence (PL) spectroscopy were used to examine the photophysical properties of statistical copolymers, poly(9,9-di(2-ethylhexyl)fluorene-stat-anthracene), with the mole ratio of the anthracene group ranging from 0 to 20%. The incorporation of the anthracene group into the conjugated backbone of the polyfluorene affec...
Article
The adsorption of tallow alkylammonium salts onto bentonite from the Lopburi province in Thailand, and the effect of surface wettability on the formation of polymer–clay nanocomposites are reported. We looked specifically at octadecyltrimethyl ammonium chloride (S18), a popular member of the tallow alkylammonium salt family. The adsorption of S18 o...
Article
This paper describes the construction of a positioning device for sample scanning in the x and y directions suitable for single molecule fluorescence experiments. The mechanism uses a simple parallelogram flexure cut out of a single aluminum plate and two amplified piezoelectric actuators of the type used for microscope objective focus adjustment....
Article
Response differences in binary mixture vapors are investigated by using two systems including the liquid phase and gas phase mixing systems. The response signal with various mixing ratios are analyzed for methanol-acetone and ethanol-acetone mixtures in both maximum response and decay characteristic during exposed and recovery periods. Both feature...
Article
This article explores photophysical properties and aggregation behaviors of conjugated polymer, poly[2-methoxy, 5-(2′-ethylhexyloxy)-1,4-phenylenevinylene](MEH−PPV), in various solvent–nonsolvent systems by utilizing UV/vis absorption and photoluminescence (PL) spectroscopy. The isolated chains of MEH-PPV dispersed in solvents including dichloromet...
Conference Paper
Full-text available
Device consisting of a micro-pattern grating structure with membrane of alternating dielectric materials such as SiO 2 , Si3N 4 and SOG or ITO, is fabricated. Its utilization as a platform for attaching active silane layer such as APTES, further as a sensor after immobilizing of sensing molecules and hybridizing with complimentary molecules is demo...
Article
Full-text available
Device consisting of a micro-pattern grating structure with membrane of alternating dielectric materials such as SiO2, Si3N4 and SOG or ITO, is fabricated. Its utilization as a platform for attaching active silane layer such as APTES, further as a sensor after immobilizing of sensing molecules and hybridizing with complimentary molecules is demonst...
Article
Modified poly(3-hexylthiophene) (P3HT) with molecule of 1,4-dithieny1-2,3,5,6-tetrafluorobenzene in the main chain was developed as a new class of conjugated polymer with high stability. The structural and optical characteristics of modified polymer were investigated by x-ray diffraction (XRD) and optical absorption spectroscopy. By comparing to ch...
Article
In dye sensitized solar cell structure, the transparent electrodes of tin oxide doped fluorine (SnO(2):F) was coated by titanium dioxide (TiO(2)) and platinum (Pt) for cathode and anode electrodes, respectively. In order to achieve high efficiency solar cell, both electrodes are required to have proper crystal structure size and morphology. These c...
Article
The layer formation of bovine serum albumin (BSA) on a poly(styrene-co-maleic acid) (PSMA) surface was investigated by using quartz crystal microbalance (QCM) technique at various pH values. The formation of a BSA surface was examined by atomic force microscopy (AFM). To study the effect on the layer formation, the pH of solution was varied from 2...