Fast catalytic and electrocatalytic oxidation of sodium borohydride on palladium nanoparticles and its application to ultrasensitive DNA detection

Department of Chemistry and Chemistry Institute of Functional Materials, Pusan National University, Busan 609-735, Korea.
Chemical Communications (Impact Factor: 6.72). 11/2009; DOI: 10.1039/b912450k
Source: PubMed

ABSTRACT We report an ultrasensitive DNA sensor using the rapid enhancement of electrocatalytic activity of DNA-conjugated Pd nanoparticles (NPs); the rapid enhancement results from the fast catalytic hydrolysis of NaBH(4) on Pd NPs and subsequent fast hydrogen sorption into Pd NPs.

  • [Show abstract] [Hide abstract]
    ABSTRACT: In a time of unprecedented change in environmental, geopolitical and socio-economic world affairs, the search for new energy materials has become a topic of great relevance. Sodium borohydride, NaBH4, seems to be a promising fuel in the context of the future hydrogen economy. NaBH4 belongs to a class of materials with the highest gravimetric hydrogen densities, which has been discovered in the 1940s by Schlesinger and Brown. In the present paper, the most relevant issues concerning the use of NaBH4 are examined. Its basic properties are summarised and its synthesis methods are described. The general processes of NaBH4 oxidation, hydrolysis, and monitoring are reviewed. A comprehensive bibliometric analysis of the NaBH4 publications in the energy field opens the discussion for current perspectives and future outlook of NaBH4 as an efficient energy/hydrogen carrier. Despite the observed exponential increase in the research on NaBH4 it is clear that further efforts are still necessary for achieving significant overchanges.
    Renewable and Sustainable Energy Reviews 10/2011; 15(8):3980–4001. DOI:10.1016/j.rser.2011.07.018 · 5.51 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Signal amplification strategies have attracted considerable attention due to the growing demands for ultrasensitive bioassays. Here, we summarize the latest developments in the application of nanomaterials as signal amplification elements in ultrasensitive DNA-based electrochemical detection. Various nanomaterials with different signal amplification routes have been reviewed briefly.
    Nano Today 04/2014; 9(2). DOI:10.1016/j.nantod.2014.04.002 · 18.43 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: A sensitive electrochemical immunosensing chip is presented by employing (i) selective modification of protein-resistant surfaces; (ii) fabrication of a stable Ag/AgCl reference electrode; (iii) capillary-driven microfluidic control; (iv) signal amplification by redox cycling along with enzymatic reaction. Purely capillary-driven microfluidic control is combined with electrochemical sandwich-type immunosensing procedure. Selective modification of the surfaces is achieved by chemical reactivity-controlled patterning and electrochemical deposition. Fluidic control of the immunosensing chip is achieved by spontaneous capillary-driven flows and passive washing. The detection limit for mouse IgG in the immunosensing chip is 10 pg/mL.
    Electroanalysis 10/2010; 22(19). DOI:10.1002/elan.201000148 · 2.50 Impact Factor