By a News Reporter-Staff News Editor at Science Letter -- A new study on Biochemistry is now available. According to news reporting out of Taipei, Taiwan, by NewsRx editors, research stated, "Because Ag and Au nanoparticles (NPs) possess well-defined localized surface plasmon resonance (LSPR) they are popularly employed in the studies of surface-enhanced Raman scattering (SERS). As shown in the literature and in our previous studies, the advantage of SERS-active Ag NPs is their higher SERS enhancement over Au NPs."
Our news journalists obtained a quote from the research from Taipei Medical University, "On the other hand, the disadvantage of SERS-active Ag NPs compared to Au NPs is their serious decay of SERS enhancement in ambient laboratory air. In this work, we develop a new strategy for preparing highly SERS-active Ag NPs deposited on a roughened Au substrate. This strategy is derived from the modification of electrochemical underpotential deposition (UPD) of metals. The coverage of Ag NPs on the roughened Au substrate can be as high as 0.95. Experimental results indicate that the SERS of Rhodamine 6G (R6G) observed on this developed substrate exhibits a higher intensity by ca. 50-fold of magnitude, as compared with that of R6G observed on the substrate without the deposition of Ag NPs. The limit of detection (LOD) for R6G measured on this substrate is markedly reduced to 2 x 10(-15) M. Moreover, aging of SERS effect observed on this developed substrate is significantly depressed, as compared with that observed on a generally prepared SERS-active Ag substrate. These aging tests were performed in an atmosphere of 50% relative humidity (RH) and 20% (v/v) O-2 at 30 degrees C for 60 day."
According to the news editors, the research concluded: "Also, the developed SERS-active substrate enables it practically applicable in the trace detection of monosodium urate (MSU)-containing solution in gouty arthritis without a further purification process."
For more information on this research see: Silver overlayer-modified surface-enhanced Raman scattering-active gold substrates for potential applications in trace detection of biochemical species. Analytica Chimica Acta, 2014;806():188-196. Analytica Chimica Acta can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Analytica Chimica Acta - www.elsevier.com/wps/product/cws_home/502681)
Our news journalists report that additional information may be obtained by contacting K.L. Ou, Taipei Medical University, Biomed Mass Imaging Res Center, Taipei 11031, Taiwan. Additional authors for this research include T.C. Hsu, Y.C. Liu, K.H. Yang and H.Y. Tsai (see also Biochemistry).
Keywords for this news article include: Asia, Taipei, Taiwan, Biochemical, Biochemistry
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