Publications by authors named "Yulia M T A Putri"

Nickel foam modified by hollow sphere NiCoO particles was successfully prepared a hydrothermal method using nanosphere SiO particles as the hard template for the hollow structure. Characterisation using SEM-EDX and TEM confirmed the structure as multiwalled hollow spheres with an average size of 270 nm, while characterisation using SEM, XRD, and XPS confirmed that the NiCoO particles were attached on the surface of the nickel foam. BET analysis showed that the surface area of the synthesized NiCoO@Ni foam was nearly three times higher compared to that of the unmodified Ni foam.

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Article Synopsis
  • Theophylline is a medication with a narrow therapeutic window, and detecting its levels is crucial to avoid toxicity; electrochemical sensors show promise for this purpose.
  • A new electrochemical sensor was developed by modifying a boron-doped diamond electrode with nickel nanoparticles, which enhanced its electrochemical properties and active surface area.
  • The modified sensor demonstrated high sensitivity, with a limit of detection at 2.79 µM, and effective performance in real sample analysis, achieving over 105% recovery in artificial urine, indicating its potential for accurate theophylline measurement.
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Boron-doped diamond (BDD) was modified with copper and gold particles by using an electrodeposition technique to improve its catalytic effect on CO reduction in a flow system. The system was optimized based on the production of formic acid by the electroreduction process. At the optimum applied potential of -1.

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An analysis tool for isoprocarb has been successfully developed as a biosensor system based on enzymatic inhibition of acetylcholinesterase (AChE) by isoprocarb. A gold nanoparticles-polyaniline modified graphite pencil electrode (AuNPs-PANI-GPE) was utilized to detect the change of thiocholine in the presence of isoprocarb. This electrode was prepared by two cyclic voltammetry steps, including the electro-polymerization of aniline on a graphite pencil and the electro-deposition of gold nanoparticles on the polyaniline surface.

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