Publications by authors named "Van Quynh Nguyen"
Article Synopsis
- Pancreaticoduodenectomy, a complex surgery, risks complications like pancreatic fistula and bile leakage, with emergency cases posing even higher threats due to patients’ unstable conditions.
- A case of a 49-year-old man who suffered severe abdominal injuries from a truck collision illustrates the challenges; despite instability, he underwent emergency pancreaticoduodenectomy and additional surgeries, facing postoperative issues managed conservatively.
- Although high-risk, emergency pancreaticoduodenectomy can be lifesaving for trauma patients with severe injuries, it should only be performed by experienced surgeons at specialized centers.
Article Synopsis
- * The process involved electrochemically modifying indium tin oxide (ITO) substrates with an IO-PEDOT layer, which was then used to deposit AgNPs, resulting in a hybrid material.
- * The hybrid structure showed significantly higher heat generation under laser irradiation compared to other configurations, due to its unique design and the combined effects of the polymer and metal nanoparticles, indicating its potential for future hyperthermia applications.
Article Synopsis
- Large-scale supercapacitor electrodes were 3D-printed onto graphite paper using a composite solution of manganese cobalt sulfide and reduced graphene oxide (MCS/rGO).
- The MCS/rGO solution was made by mixing MCS nanoparticles and reduced graphene oxide in a solvent called dimethylformamide, with its properties analyzed using various microscopy and diffraction techniques.
- The resulting electrodes demonstrated impressive performance with a specific capacitance of 3812.5 F/g and over 92% capacitance retention after 22,000 cycles, making them promising for energy storage applications.
This work investigates the structure, optical and electrical conductivity properties of BaTi Co O (0≤ ≤0.1) ceramics prepared by the hydrothermal method. The X-ray diffraction and Raman scattering analysis demonstrates that the prepared samples have a single-phase tetragonal structure with 4 symmetry.
View Article and Find Full Text PDFThis paper describes a rapid bottom-up approach to selectively functionalize gold nanoparticles (AuNPs) on an indium tin oxide (ITO) substrate using the plasmon confinement effect. The plasmonic substrates based on a AuNP-free surfactant were fabricated by electrochemical deposition. Using this bottom-up technique, many sub-30 nm spatial gaps between the deposited AuNPs were randomly generated on the ITO substrate, which is difficult to obtain with a top-down approach (i.
View Article and Find Full Text PDFElectrochemical Sensor Based on Reduced Graphene Oxide/Double-Walled Carbon Nanotubes/Octahedral FeO/Chitosan Composite for Glyphosate Detection.
Bull Environ Contam Toxicol
June 2021
In this work, reduced graphene oxide/double-walled carbon nanotubes/octahedral-FeO/chitosan composite material modified screen-printed gold electrodes (rGO/DWCNTs/Oct-FeO/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 square wave voltammetry (SWV). With the electroactive surface area is 1.
View Article and Find Full Text PDFIn this work, we have combined nanosphere lithography with electrochemical reduction of aryldiazonium salts to elaborate nanostructured mixed layers of organic materials. The strategy consists first in the deposition of a close-packed hexagonal monolayer of microbeads used as a mask for the electroreduction of a first aryldiazonium salt. After removing the beads, an ultrathin organic layer with holes remains.
View Article and Find Full Text PDFA plasmonic molecular electronic device, consisting of poly(3,4-ethylenedioxythiophene) (PEDOT) nanowires bridging an ultramicroelectrode and an indium tin oxide (ITO) substrate covered by gold nanoparticles (Au NPs), has been developed. Light irradiation of this device has a dramatic impact on its conductance. Polymer strands, maintained electrochemically in their oxidized, conducting state, reversibly switch to their insulating state upon irradiation by visible-wavelength light, resulting in a sharp decrease in the conductance.
View Article and Find Full Text PDFSurface grafting from diazonium solutions triggered by localized surface plasmon has been investigated. An organic layer that is 20-30 nm thick is easily grafted onto gold nanoparticles (AuNPs) by visible-light illumination in a few minutes without any reducing agent or molecular photocatalyst. Grafting depends on the wavelength and polarization of the incident light.
View Article and Find Full Text PDFA new heteroleptic polypyridyle Ru(II) complex was synthesized and deposited on surface by the diazonium electroreduction process. It yields to the covalent grafting of a monolayer. The functionalized surface was characterized by XPS, electrochemistry, AFM, and STM.
View Article and Find Full Text PDFArticle Synopsis
- PEDOT films were created using a layer-by-layer technique on an ITO surface, resulting in honeycomb structures with varying morphologies influenced by polymerization time and charge density.
- Scanning electron microscopy and atomic force microscopy showed that the dimensions of the PEDOT structures can be finely tuned, with different shapes forming based on the size of the nanospheres used.
- The resulting nanostructured PEDOT electrodes improved the performance of dye-sensitized solar cells, increasing their efficiency from 7.0% to 8.1% compared to bulk PEDOT.