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58
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682
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Citations since 2017
Introduction
I am currently working on biosensing microsystems and organ-on-a-chip
Skills and Expertise
Additional affiliations
April 2014 - present
University of Science and Technology of Hanoi, Hanoi, Vietnam (Vietnam France University)
Position
- Lecturer
Description
- Subjects: Fundamentals of Materials, Solid State Physics, Physicochemistry of Surfaces and Interfaces, Characterization of Nanomaterials
Publications
Publications (58)
The use of metal-organic framework materials in electrochemical sensors has been gaining more attention in the last few years due to their highly porous structure and electrocatalytic activity. In this work, a novel paracetamol electrochemical sensor based on a Cu-BTC microporous film electrochemically grown onto glassy carbon electrode was introdu...
In this paper, a novel bimetallic Fe-Cu metal-organic framework combined with 1,3,5-benzenetricarboxylic acid (Fe-Cu-BTC) are synthesized using hydrothermal reaction. The bimetallic Fe-Cu-BTC with high BET (1504 cm3 g-1) and high Langmuir surface area (1831 cm3 g-1) is composited by gold nanoparticles to improve the conductivity and to develop thei...
In this study, a hybrid film based on copper chloride doped graphene/double-walled carbon nanotubes (CuCl-Gr/DWCNTs) was prepared for further application in detection of glyphosate (Gly) at low levels. Gr/DWCNTs film was first fabricated on copper foil and then modified with CuCl using thermal chemical vapor deposition (CVD) technique, before being...
In this study, epitope-imprinted polydopamine (PDA) magnetic nanoparticles (EIP-MNP) were developed for selective separation of allergenic ovalbumin (OVA). The imprinting process was conducted through the polymerization of dopamine in the presence of OVA IgE-binding epitope as the template. Molecularly imprinted PDA was self-assembled on the surfac...
In this work, pyrolytic carbon electrodes were prepared through pyrolysis of well-patterned AZ 1505 positive photoresist films. The designed electrodes firstly were prepared via photolithography technique, then the polymer was thermally broken-down into carbon skeletons in an oxygen-free environment using pyrolysis technique. The effect of the high...
In recent years, there has been increasing interest in photoactive packaging materials, which inactivate bacteria via the photoactivation of light‐sensitive compounds. One of the existing challenges is the reduced stability and efficacy of these materials due to light exposure. In this study, the effect of cellulose nanocrystal (CNC) loading on the...
In this work, an enzymatic liquid-gated field-effect-transistor sensor based on chemically reduced graphene oxide film was develop for determination of acetylthiocholine in aqueous conditions. The device was designed with interdigitated electrode configuration and then manufactured by combining lithography and chemical vapor deposition techniques i...
The methanol oxidation reaction (MOR) has recently gained a lot of attention due to its application in fuel cells and electrochemical sensors. To enhance the MOR, noble metal nanoparticles should be homogeneously dispersed on the electrode surface with the aid of one suitable support. In this work, 4-aminothiophenol (4-ATP) molecules which contain...
In this work, we describe the fabrication of a conformable capacitive pressure sensor obtained by inkjet-printing silver electrodes onto polyimide foils subsequently glued face-to-face onto a double-sided tape. The sensor operates for pressures between ca. 1 Pa and 2 kPa. Its response time is 0.25 s. It presents a non-linear response as a function...
on morphological characterization using scanning electron microscopy and chemical compositions in energy-dispersive X-ray spectra have demonstrated the uniformity of developed hybrid structures. It was found that the electron transfer rate was much enhanced (apparent transfer rate constant k app was increased by 2640 times) on highly uniform AuNPs/...
In this study, a sensitive and selective electrochemical sensor based on a zirconia oxide-decorated gold nanoflake nanocomposite-modified glassy carbon electrode (AuNP/ZrO2/GCE) for the detection of 2,4-dichlorophenol (2,4-DCP) was developed. ZrO2 was first synthesized using the sol–gel method and then drop-cast onto the electrode surface, followed...
In this work, we focus on synthesizing g-C3N4 nanosheets with a large surface area for enhanced solar light photocatalytic performance via a simple thermal polymerization of a low-cost urea precursor in enclosed conditions. The effects of annealing duration on the phase formation, structure, and optical and photocatalytic properties of the g-C3N4 n...
In this study, a packaging film based on aloe emodin (AE)-incorporated poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was developed. The film can inactivate contaminated bacteria through the photoactivation of aloe emodin under blue light (400 nm–500 nm). The fabrication process and key factors affecting the performance of the material were in...
In this work, we focus on synthesizing 3D hierarchical Fe3O4/ZnO hybrid nanostructures to improve the solar light photodegradation activity and magnetic reusability of the ZnO semiconductor. These hierarchical nanostructures (defined as 3D Fe3O4/ZnO HSt) were successfully synthesized using a simple sol–gel process with an average diameter of 200 nm...
In this work, we focus on synthesizing g-C 3 N 4 nanosheets with a large surface area for enhanced solar light photocatalytic performance via a simple thermal polymerization of a low-cost urea precursor in enclosed conditions. The effects of annealing duration on the phase formation, structure, and optical and photocatalytic properties of the g-C 3...
In this work, reduced graphene oxide/double-walled carbon nanotubes/octahedral-Fe3O4/chitosan composite material modified screen-printed gold electrodes (rGO/DWCNTs/Oct-Fe3O4/Cs/SPAuE) under inhibition of urease enzyme was developed for the determination of glyphosate (GLY). The electrochemical behaviors of GLY on these electrodes were evaluated by...
It is essential to develop new nanomaterials able to improve sensing performance of electrochemical sensors for determination of heavy metal pollutants. In this work, a novel nanoscale metal–organic-framework material (Yb-MOF) with Ytterbium (Yb) rare-earth metal core and benzenetricarboxylic (BTC) ligands was prepared in aqueous conditions using h...
A novel, sensitive and selective electrochemical sensor based on epitope-imprinted polydopamine (PDA) was developed for ovalbumin (OVA) detection. Molecularly imprinted polydopamine was synthesized on an AuNP-coated screen-printed carbon electrode (SPCE) via electropolymerization in the presence of OVA IgE-binding epitope as the template. Key proce...
In the present work, we reported the simple way to fabricate an electrochemical sensing platform to detect Bisphenol A (BPA) using galvanostatic deposition of Au on a glassy carbon electrode covered by cetyltrimethylammonium bromide (CTAB). This material (CTAB) enhances the sensitivity of electrochemical sensors with respect to the detection of BPA...
In the present work, we reported the fabrication of a novel electrochemical sensing platform to detect 2,4-dichlorophenol (2,4-DCP) by using a copper benzene-1,3,5-tricarboxylate–graphene oxide (Cu–BTC/GO) composite. The sensor was prepared by drop-casting Cu–BTC/GO suspension onto the electrode surface followed by electrochemical reduction, leadin...
Nowadays, sensor devices are developing fast. It is therefore critical, at a time when the availability and recyclability of materials are, along with acceptability from the consumers, among the most important criteria used by industrials before pushing a device to market, to review the most recent advances related to functional electronic material...
In present study, a simple carbon paste electrode modified with iron oxide nanoparticles was used as an electrochemical sensor to analyze phenolic compounds. The combination of differential pulse voltammetry technique with partial least-squares multivariable analysis enabled simultaneous determination of six different compounds in phenolic mixtures...
In this work, an electrochemical transducing platform constructed from carbonaceous tubes modified with thiophene polymer and gold nanoparticles was described. The negatively charged carbon tubes attracted monomers on their surface, then migrated toward the electrode upon electrical driving force, and finally deposited on the electrode surface. Con...
In this work, we successfully demonstrated the facile fabrication of highly flexible and floatable Cu2O/rGO on Vietnamese traditional paper (VTP) for the solar-light-driven photocatalytic degradation of the antibiotic ciprofloxacin. The catalyst membrane was prepared by the green reduction of both Cu(OH)2 to Cu2O nanoparticles and graphene oxide to...
This work aims to study the optimal conditions to synthesize hydroxyapatite-multiwalled carbon nanotube (HAp-MWCNT) coatings on Ti6Al4V by electrodeposition technique. The structural behaviors, morphology, and mechanical properties of the coatings were characterized by various advanced methods. The analyzed results showed that the obtained coatings...
Among organic thin film transistors (OTFTs), Organic Electrochemical Transistors (OECTs) have been extensively used for cell monitoring while Electrolyte-Gated Organic Field-Effect Transistors (EGOFETs) have never been described for that kind of application. However, EGOFETs are well adapted for this use because, as well as OECTs, they can operate...
The combination of magnetic fluid hyperthermia and magnetic resonance imaging is recently considered to be one of the most promising non-invasive cancer treatment. In this work, a highly stable ferrofluid based on magnetite nanoparticles with high magnetization and high specific absorption rate will be developed. The ferrofluid was synthesized by t...
This paper develops a novel and convenient approach to deposit poly(3,4- ethylenedioxythiophene)-reduced graphene oxide (PEDOT-rGO) hybrid film in aqueous solution through electrochemical process. The PEDOT-rGO film exhibited supperior charge transfer capability with charge transfer resistance of 1333Ω.cm−2 and standard transfer rate constant of 0.14...
In this report, a composite adsorbent in form of spherical beads generated from graphene oxide, chitosan, and magnetite (MGOCS) was developed and characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscope, and vibrating sample magnetometer. The adsorption ability of MGOCS towards...
This work proposes an approach for Cu²⁺ sensing in water which combines the selectivity of the Gly-Gly-His (GGH) peptide probe with the sensitivity of the electrolyte-gated organic field-effect transistor (EGOFET). The oligopeptide probe was immobilized onto the gate electrode of the transistor by electrooxidation of the primary amine of the glycin...
A novel in-situ approach based on electrochemical techniques has been developed for incorporating iron oxide nanoparticles onto CVD-grown few-layered graphene nanosheets. The embedment of Fe3O4 nanoparticles within graphitic planes was realized by sweeping conductive Gr electrode in a diluted solution of ultrafast redox probe K3[Fe(CN)]6. The morph...
The objective of this study was to develop a simple, inexpensive prototype device for rapid detection of hepatitis B virus (HBV). The device was able to simultaneously amplify, detect and quantify the target HBV DNA. The system was fabricated from a custom-made electrochemical set-up of which the temperature was thermostatically controlled by a wat...
The development of low cost, portable diagnostic tools for in-field detection of viruses and other pathogenic microorganisms is in great demand but remains challenging. In this study, a novel approach based on reduced graphene oxide-polyaniline (rGO-PANi) film for the in situ detection of loop-mediated-isothermal-amplification (LAMP) products by me...
Consider advances are being made to develop new technologies capable of fast in-situ tracing of agricultural toxins. In this work, we reported a simple carbaryl sensor with very high sensitivity using graphene interdigitated ion selective field effect transistor (ISFET). The graphene films were first prepared on polycrystalline copper foil by a low...
A low-cost screen-printed carbon electrode (SPCE) modified with Fe3O4, gold nanoparticles (AuNPs), and polyaniline (PANI) has been developed for rapid measurement of carcinoembryonic antigen (CEA) biomarker. The electrode surface was covered with Fe3O4 nanoparticles by drop coating then with PANI via electropolymerization. The resulting surface was...
We describe an electrochemical immunosensor based on functionalization of a working electrode by electrografting two functional diazonium salts. The first one is a molecular probe, diclofenac, coupled with an arylamine onto which a specific antibody is immobilized by affinity interactions; the second is a redox probe (a quinone) also coupled with a...
An optimization process of electroless plating of nickel was carried out with NiCl2 as the nickel ion source, NaH2PO2 as the reduction agent, CH3COONa and Na3C6H5O7 as complexing agents. Electroless plated nickel layers on sputtered aluminum corning glass substrates with a resistivity of about 75.9 μΩ.cm and a nickel concentration higher than 93% w...
Accurate in situ diagnostic tests play a key role in patient management and control of most infectious diseases. To achieve this, use of handheld biochips that implement sample handling, sample analysis, and result readout together is an ideal approach. We present herein a fluid-handling biochip for real-time electrochemical monitoring of nucleic a...
A simple approach was explored to prepare N-doped anatase TiO2 nanoparticles (N-TiO2 NPs) from titanium chloride (TiCl4) and ammonia (NH3) via sol–gel method. The effects of important process parameters such as calcination temperatures, NH3/TiCl4 molar ratio (RN) on crystallite size, structure, phase transformation, and photocatalytic activity of t...
We describe the fabrication of highly sensitive graphene-based field effect transistor (FET) enzymatic biosensor for trace-detection of atrazine. The few-layers graphene films were prepared on polycrystalline copper foils by atmospheric pressure chemical vapor deposition method using an argon/hydrogen/methane mixture. The characteristics of graphen...
Highly stable Fe3O4 liquid was synthesized by thermal decomposition using poly(acrylic acid) (PAA) as a phase transfer ligand. The crystalline structure, morphology, and magnetic properties of the as-prepared samples were thoroughly characterized. Results demonstrated that the magnetic Fe3O4 nanomaterial was formed in liquid phase with a spinel sin...
This study describes sol–gel preparation of (TiO2:Fex
)/SiO2 (x = 0–0.8%) on silicagel grains using titanium tetraisopropoxide and iron (III) chloride as titanium precursor and doping agent, respectively. The structural properties, morphology, and chemical composition of the samples were thoroughly studied using x-ray diffraction, field emission sc...
In this study, a novel layer-by-layer polyaniline/graphene (PANi/Gr) structure for electrochemical detection of atrazine was developed. Gr film was synthesized by thermal chemical vapor deposition (CVD) method and transferred onto the PANi-predeposited microelectrode. The properties of PANi/Gr film were thoroughly investigated by high-resolution tr...
In this work, we have developed a convenient approach to synthesize magnetic nanoparticles with relatively high magnetization and controllable sizes. This was realized by combining the traditional co-precipitation method and microfluidic techniques inside microfluidic devices. The device was first designed, and then fabricated using simplified soft...
In this study, a poly(methyl methacrylate) (PMMA) microfluidic device fabricated by an inexpensive CO2 laser etching system was developed for detection of carcino-embryonic antigens (CEA). The device was capable of working in continuous mode and was designed with the aid of numerical simulation. The detection of target CEA was based on immuno-assay...
In this work, a lactose biosensor was developed by co-immobilizing β-galactosidase (β-Gal) and glucose oxidase (GOx) on microelectrodes pre-modified with Pt/graphene/P(1,5-DAN) for estimation of lactose in dairy products to prevent lactose intolerance. The Pt microelectrode was modified with graphene and 1,5-polydiaminonaphthalene film. Graphene wa...
Highly stable Fe3O4 liquid was synthesized by thermal decomposition using poly(acrylic acid) (PAA) as a phase transfer ligand. The crystalline structure, morphology, and magnetic properties of the as-prepared samples were thor- oughly characterized. Results demonstrated that the magnetic Fe3O4 nano- material was formed in liquid phase with a spinel...
We have tested CE separation of selected samples in capillaries with polydopamine modified surface. The capillaries were modified by polydopamine or polydopamine with an additive. The polydopamine coating with additive represents a simple and effective procedure for capillary alteration by another modificator such as hydroxyethyl cellulose, hydroxy...
Questions
Questions (2)
Can we determine standard rate constant k of electron transfer for K3/K4 from CV curves using NOVA software???
I am working on this type of material and I got the cantilever broken or contaminated due to the sticky polydopamine. I don't know if we have some special cantilevers for these sticky materials?
Projects
Projects (2)
Circulating tumor cells (CTCs) are cancer cells that circulate in the blood stream after being naturally shed from original or metastatic tumors. The high-precision detection of such extremely rare cells enables non-invasive diagnosis at early stages of cancer in liquid biopsy. However, the isolation and detection of these cells are technically challegening due to the low concentration in bodily fluids, non-homogeneous size and morhology, and high softness of these living entities. Recently, the newly emerging microfluidic technology has been proven as an innovative approach to overcome many drawbacks of cell benchtop systems since they are capable to provide automatic, programmable, scalable, and highly efficient manipulation of liquid sample flow at low volume (several nanolittres or microlitres). In this work, we will develop a new and novel microfluidic system for efficient isolation and highly sensitive protein analysis of CTCs. Firstly, the PDMS based microfluidic platform is prepared using convenient microfabrication techniques in clean-room. Some multidimensional microstructures (herringbone, pillars, holes…) will be patterned inside the device in order to provide high surface area, high selectivity and good adhesion for isolation. Then one conductive material (i.e., gold or graphene) will be electro-less deposited onto the chip surface using mussel-inspired surface chemistr. Finally, the tumor-derived antibodies (i.e, anti-EpCAM) will be fixed onto the platform and ready for futher detection of proteins of CTCs. The development of this innovative technology will pave the pathway for future high-precision personalized medicines.
In this study, a complete hand-held device will be developed for rapid, multiplex and in-situ detection of toxic substances in agricultural products. The sensing performance is based on enzymatic reactions taking place in the same time at different detector zone inside a microfluidic system. Such kind of system will probably provide an opportunity for full analysis of safety of agricultural products.