ORCID Profile
0000-0001-7965-7715
Current Organisations
Chiang Mai University
,
University of Wollongong
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Publisher: Elsevier BV
Date: 11-2018
DOI: 10.1016/J.JCIS.2018.06.072
Abstract: The objective of our work is to improve low-temperature fuel cell catalysts by increasing the surface area to augment the efficiency of catalytic reactions. Reduced graphene oxide (rGO) supports were prepared by adding N-containing derivatives of polydopamine (PDA) and loading of Pt and Pt-based metal alloy nanoparticles were accomplished for catalyst preparation. To study the effects of surface modification on catalyst activity, the GO surfaces modified by addition of PDA (PDA-rGO) were richer in oxygen- and nitrogen-containing functional groups, which reduced the number of graphene defects. Reduction of metals (M = Pt, Pd, Pt
Publisher: Springer Science and Business Media LLC
Date: 09-2018
Publisher: Springer Science and Business Media LLC
Date: 07-2006
Publisher: IOP Publishing
Date: 15-01-2018
Publisher: Informa UK Limited
Date: 02-07-2020
Publisher: Elsevier BV
Date: 03-2011
Publisher: Elsevier BV
Date: 10-2019
Publisher: Elsevier BV
Date: 08-2013
Publisher: Elsevier BV
Date: 06-2006
Publisher: Springer Science and Business Media LLC
Date: 07-2006
Publisher: Elsevier BV
Date: 02-2020
DOI: 10.1016/J.TALANTA.2019.120389
Abstract: In this work, we developed an effective voltammetric immunosensing platform for the sensitive detection of prostate specific antigen (PSA) utilizing a graphene oxide (GO) modified screen-printed carbon electrode (SPCE) hybridized with the ex-situ prepared silver nanoparticles (AgNPs) as a probe and signal transducer. The sensing platform comprises a direct-type immunoassay involving the selective interaction of PSA with anti-PSA. The surface morphology and analytical performance of the modified SPCE were characterized through relevant instrumentations. The changes in the voltammetric reduction current of AgNPs at 0.11 V in the sensor electrode was correlated to the PSA concentration. Under optimum conditions, the fabricated immunosensor exhibited a sensitive response to PSA with a limit of detection (LOD) of 0.27 ng mL
Publisher: Wiley
Date: 11-10-2018
Publisher: Elsevier BV
Date: 02-2019
Publisher: Springer Science and Business Media LLC
Date: 07-06-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6FD00252H
Abstract: We have recently reported that reversible electrowetting can be observed on the basal plane of graphite, without the presence of a dielectric layer, in both liquid/air and liquid/liquid configurations. The influence of carbon structure on the wetting phenomenon is investigated in more detail here. Specifically, it is shown that the adsorption of adventitious impurities on the graphite surface markedly suppresses the electrowetting response. Similarly, the use of pyrolysed carbon films, although exhibiting a roughness below the threshold previously identified as the barrier to wetting on basal plane graphite, does not give a noticeable electrowetting response, which leads us to conclude that specific interactions at the water–graphite interface as well as graphite crystallinity are responsible for the reversible response seen in the latter case. Preliminary experiments on mechanically exfoliated and chemical vapour deposition grown graphene are also reported.
Publisher: IOP Publishing
Date: 28-11-2019
Publisher: IEEE
Date: 02-2010
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1CP05893B
Abstract: A grating structure fabricated by AgNPs strongly enhances electric field intensity in the large area of the film, which results in higher heat generation.
Publisher: Wiley
Date: 22-05-2007
Publisher: Informa UK Limited
Date: 24-07-2019
Publisher: Elsevier BV
Date: 02-2012
Publisher: Elsevier BV
Date: 08-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0AN02149K
Abstract: A novel electrochemical immunosensor for the detection of a new lung cancer biomarker based on a polyoxometalate-adsorbed poly(ethylenimine)-coated gold nanoparticle modified electrode.
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 10-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TB00940K
Abstract: A novel label-free electrochemical immunosensor is developed for the simultaneous detection of breast cancer biomarkers employing redox species-antibody-conjugated polyethyleneimine-coated AuNPs.
Publisher: IEEE
Date: 09-2017
Publisher: Informa UK Limited
Date: 09-09-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1AN00116G
Abstract: An ultrasensitive electrochemical biosensor based on a gold nanoparticles/graphene olypyrrole composite modified electrode and a signal lification strategy employing methylene blue is developed as a potential tool for the detection of miRNA-21.
Publisher: Springer Science and Business Media LLC
Date: 16-12-2020
DOI: 10.1038/S41586-020-03043-4
Abstract: The safe, highly effective measles vaccine has been recommended globally since 1974, yet in 2017 there were more than 17 million cases of measles and 83,400 deaths in children under 5 years old, and more than 99% of both occurred in low- and middle-income countries (LMICs) 1–4 . Globally comparable, annual, local estimates of routine first-dose measles-containing vaccine (MCV1) coverage are critical for understanding geographically precise immunity patterns, progress towards the targets of the Global Vaccine Action Plan (GVAP), and high-risk areas amid disruptions to vaccination programmes caused by coronavirus disease 2019 (COVID-19) 5–8 . Here we generated annual estimates of routine childhood MCV1 coverage at 5 × 5-km 2 pixel and second administrative levels from 2000 to 2019 in 101 LMICs, quantified geographical inequality and assessed vaccination status by geographical remoteness. After widespread MCV1 gains from 2000 to 2010, coverage regressed in more than half of the districts between 2010 and 2019, leaving many LMICs far from the GVAP goal of 80% coverage in all districts by 2019. MCV1 coverage was lower in rural than in urban locations, although a larger proportion of unvaccinated children overall lived in urban locations strategies to provide essential vaccination services should address both geographical contexts. These results provide a tool for decision-makers to strengthen routine MCV1 immunization programmes and provide equitable disease protection for all children.
Publisher: Springer Science and Business Media LLC
Date: 03-2016
Abstract: In this work, a cost-effective and simple-to-prepare label-free electrochemical immunosensor was, for the first time, fabricated by modifying high-quality graphene oxide (GPO) onto a screen-printed carbon electrode (SPCE). The anti-IgG antibody was then covalently immobilized to the carboxylic group anchoring on the surface of GPO particles. Under the optimized condition, our newly developed immunosensor selectively bound to human immunoglobulin G (IgG), a model biomarker, with high sensitivity at a limit of detection of 1.99 ng mL(-1), potentially sensitive enough for IgG detection at the pathophysiological level, and had a linear range of 2.5 to 100 ng mL(-1). The proposed immunosensor also exhibited high reproducibility and regenerability, resulting in no significant change in electrochemical signals from different replicates of the electrode, and a robust electrochemical current after being subjected to alkaline base washing with several cycles. To this end, our immunosensor demonstrates ability as a promising diagnostic tool for clinical assessment.
Publisher: The Chemical Society of Japan
Date: 05-12-2016
DOI: 10.1246/CL.160715
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8NA00119G
Abstract: The performance of organic solar cells was improved by the effect of a synergistic gold quantum dot lasmonic gold nanoparticle system.
Publisher: Springer Science and Business Media LLC
Date: 02-11-2016
Publisher: Elsevier BV
Date: 06-2019
DOI: 10.1016/J.BIOELECHEM.2019.01.008
Abstract: A facile one-step electrochemical synthesis of a platinum/reduced graphene oxide oly(3-aminobenzoic acid) (Pt/rGO/P3ABA) nanocomposite film on a screen-printed carbon electrode (SPCE) and its application in the development of sensitive erometric biosensors was successfully demonstrated herein. The electropolymerization of P3ABA together with co-electrodeposition of rGO and Pt was conducted by cyclic voltammetry, as was the GO reduction to rGO. A Pt/rGO/P3ABA-modified SPCE exhibited excellent electrocatalytic oxidation towards hydrogen peroxide (H
Publisher: Elsevier BV
Date: 10-2020
Publisher: Informa UK Limited
Date: 11-02-2018
Publisher: Elsevier BV
Date: 06-2006
Publisher: Elsevier BV
Date: 10-2020
Publisher: Springer Science and Business Media LLC
Date: 27-04-2019
DOI: 10.1007/S00604-019-3370-4
Abstract: A novel sandwich-type electrochemical multiplex immunoassay is described for simultaneous detection of the tumor biomarkers alpha fetoprotein (AFP), carcinoembryonic antigen (CEA), prostate-specific antigen (PSA) and interleukin-8 (IL-8). Polyethylenimine-coated gold nanoparticles (PEI-AuNPs) were used for both modification of a screen-printed carbon electrode (SPCE) and as labeling tags. The coated AuNPs can be easily adsorbed on the electrodes which also are loaded with the electroactive metal ions cadmium(II), lead(II) copper(II) and silver(I) and related secondary antibodies (Ab
Publisher: Elsevier BV
Date: 06-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1AN00436K
Abstract: An electrochemical biosensor employing a gold nanoparticles/graphene quantum dots/graphene oxide composite modified electrode is developed for the multiplex detection of miRNA breast cancer biomarkers.
Publisher: Elsevier BV
Date: 07-2020
Publisher: Elsevier BV
Date: 08-2018
Publisher: Elsevier BV
Date: 06-2020
Publisher: Springer Science and Business Media LLC
Date: 03-02-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2AY00893A
Abstract: Controlling the fluorescence intensity of AuQDs by shifting the SPR-excitation wavelength was demonstrated by stretching the Al-coated PDMS-grating substrate.
Publisher: Wiley
Date: 31-10-2019
Publisher: Informa UK Limited
Date: 2021
Publisher: The Chemical Society of Japan
Date: 05-06-2015
DOI: 10.1246/CL.150101
Publisher: Elsevier BV
Date: 02-2017
Publisher: Informa UK Limited
Date: 06-08-2017
DOI: 10.1080/21691401.2017.1360322
Abstract: This work focuses on fabricating poly(2-aminobenzylamine)-modified screen-printed carbon electrode as an electrochemical immunosensor for the label-free detection of human immunoglobulin G. To selectively detect immunoglobulin G, the anti-immunoglobulin G antibody with high affinity to immunoglobulin G was covalently linked with the amine group of poly(2-aminobenzylamine) film-deposited screen-printed carbon electrode. The selectivity for immunoglobulin G was subsequently assured by being challenged with redox-active interferences and adventitious adsorption did not significantly interfere the analyte signal. To obviate the use of costly secondary antibody, the [Fe(CN)
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0NA00169D
Abstract: The performance of organic solar cells was improved by the effect of a synergistic gold quantum dot lasmonic grating system.
Publisher: Elsevier BV
Date: 12-2021
DOI: 10.1016/J.BIOELECHEM.2021.107944
Abstract: Methylene blue (MB) adsorption onto a two-dimensional molybdenum disulfide (2D MoS
Publisher: Elsevier BV
Date: 08-2017
DOI: 10.1016/J.TALANTA.2017.04.058
Abstract: Sequential injection (SI) system incorporated with erometric immunosensor was developed for sensitive determination of human immunoglobulin G (HIgG). A cost effective label-free immunosensor was fabricated by immobilizing anti-HIgG on a graphene oxide (GO) modified screen-printed carbon electrode (SPCE). The developed electrode was characterized by cyclic voltammetry(CV), scanning electron microscope(SEM), and energy dispersive spectroscopy(EDS) which confirmed the selective immunointeraction of HIgG to the anti-HIgG on the electrode, thus reduced the erometric current of [Fe(CN)
Publisher: Springer Science and Business Media LLC
Date: 06-06-2019
Publisher: Hindawi Limited
Date: 2013
DOI: 10.1155/2013/943256
Abstract: Au/BiVO 4 visible-light-driven photocatalysts were synthesized by coprecipitation method in the presence of sodium dodecyl benzene sulfonate (SDBS) as a dispersant. Physical characterization of the obtained materials was carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), UV-Vis diffuse reflectance spectroscopy (DRS) and Brunauer, and Emmett and Teller (BET) specific surface area measurement. Photocatalytic performances of the as-prepared Au/BiVO 4 have also been evaluated via mineralizations of oxalic acid and malonic acid under visible light irradiation. XRD and SEM results indicated that Au/BiVO 4 photocatalysts were of almost spherical particles with scheelite-monoclinic phase. Photocatalytic results showed that all Au/BiVO 4 s les exhibited higher oxalic acid mineralization rate than that of pure BiVO 4 , probably due to a decrease of BiVO 4 band gap energy and the presence of surface plasmon absorption upon loading BiVO 4 with Au as evidenced from UV-Vis DRS results. The nominal Au loading amount of 0.25 mol% provided the highest pseudo-first-order rate constant of 0.0487 min −1 and 0.0082 min −1 for degradations of oxalic acid (C 2 ) and malonic acid (C 3 ), respectively. By considering structures of the two acids, lower pseudo-first-order rate constantly obtained in the case of malonic acid degradation was likely due to an increased complexity of the degradation mechanism of the longer chain acid.
Publisher: Informa UK Limited
Date: 06-09-2019
No related grants have been discovered for Kontad Suriya Ounnunkad.