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Tailoring Catalytic Activity of Pt Nanoparticles ...
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Sensitive Electrochemical Penicillin Sensor Based on Screen-printed Carbon Electrode Modified with Dendrimer-encapsulated Pt Nanoparticles
| Journal | Bull. Korean Chem. Soc. |
|---|---|
| Author | Youngwon Ju and Joohoon Kim |
| Citation | Bull. Korean Chem. Soc., 2016, 37, 397?400 |
| DOI | https://doi.org/10.1002/bkcs.10680 |
In this context, we report an electrochemical penicillin sensor utilizing dendrimer-encapsulated Pt nanoparticles (Pt DENs) as electrocatalysts for the sensitive detection of penicillin. The electrochemical penicillin sensor was prepared using a screen-printed carbon electrode (SPCE), on which both Pt DEN and penicillinase were immobilized. Upon the addition of penicillin, the immobilized penicillinase catalyzes the hydrolysis of penicillin to penicilloic acid, resulting in the production of H+ ions which are electrochemically detected by means of the catalyzed electrochemical reduction of the generated H+ ions on the Pt
DEN-modified SPCE surface. Specifically, we synthesized Pt DENs containing an average of 147 atoms using amineterminated sixth-generation polyamidoamine dendrimers, which we denote as G6-NH2(Pt147), and immobilized the Pt DENs with penicillinase enzymes onto SPCE surfaces. The resulting SPCE exhibited highly enhanced electrocatalytic activity for the electrochemical reduction of H+ ions, leading
to significantly increased cathodic current of H+. Especially, the Pt DEN-modified SPCE resulted in the electrochemical detection of penicillin as low as 0.1 μM, which allowed sensitive analysis of penicillin even in human blood serum.
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Tailoring Catalytic Activity of Pt Nanoparticles Encapsulated Inside Dendrimers by Tuning Nanoparticle Sizes with Subnanometer Accuracy for Sensitive Chemiluminescence-Based Analyses
Category2016 AuthorHyojung Lim, Youngwon Ju, and Joohoon Kim JournalAnal. Chem. CitationAnal. Chem. 2016, 88, 9, 4751?4758
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Sensitive Electrochemical Penicillin Sensor Based on Screen-printed Carbon Electrode Modified with Dendrimer-encapsulated Pt Nanoparticles
Category2016 AuthorYoungwon Ju and Joohoon Kim JournalBull. Korean Chem. Soc. CitationBull. Korean Chem. Soc., 2016, 37, 397?400 -
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Fluorescence Quenching of Dendrimer-Encapsulated CdS Quantum Dots for the Detection of H2O2
Category2016 AuthorHyojung Lim, Hai Dong Kim, Joohoon Kim JournalBull. Korean Chem. Soc. CitationBull. Korean Chem. Soc., 2016, 37, 254?257 -
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Functionalization of indium tin oxide electrode with both of dendrimer-encapsulated Pt nanoparticles and chemically converted graphenes for enhanced electrochemiluminescence of luminol/H2O2
Category2016 AuthorJisoo Yoon, Taehoon Cho, Hyojung Lim, Joohoon Kim JournalAnal Bioanal Chem CitationAnal Bioanal Chem (2016) 408:7165?7172
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