Component‐Controlled Synthesis of Small‐Sized Pd‐Ag Bimetallic Alloy Nanocrystals and Their Application in a Non‐Enzymatic Glucose Biosensor. (20th March 2013)

• Record Type: Journal Article
• Authors: Liu, Suli; Zhang, Can; Yuan, Lin; Bao, Jianchun; Tu, Wenwen; Han, Min; Dai, Zhihui
• Is Part Of: Particle and particle systems characterization. Volume 30:Number 6(2013:Jun.)
• Page Start: 549
• Page End: 556
• Publication Date: 2013-03-20
• Subjects: Particles -- Periodicals; 620.43
• DOI: 10.1002/ppsc.201200150
• Languages: English
• ISSNs: 0934-0866

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Small‐sized monodisperse Pd‐Ag alloy nanocrystals (NCs) are synthesized via a solid‐liquid and solid‐solid phase chemical route, i.e., sequential reduction of Pd(NO<sub>3</sub>)<sub>2</sub> and AgNO<sub>3</sub> solid precursors in the liquid mixture of dodecylamine and 1‐octadecene, followed by fusion of formed Pd and Ag NCs at 250 °C. By controlling the addition sequence and molar ratio of the metallic precursors, a series of Pd‐Ag alloy NCs, including Pd<sub>5</sub>Ag, Pd<sub>2</sub>Ag, PdAg, PdAg<sub>2</sub>, and PdAg<sub>5</sub>, is obtained. The alloy NCs are highly crystallized and exhibit a strong atomic ensemble in addition to component‐dependent electronic effects. Pd<sub>2</sub>Ag NCs have unique structure and electronic properties, showing a much faster electron transfer process at a modified glassy carbon electrode interface compared with that of other alloys. Therefore, the Pd<sub>2</sub>Ag NCs are chosen as the electrocatalyst to evaluate the performance of Pd‐Ag nanoalloy and a novel non‐enzymatic glucose biosensor is fabricated. The biosensor exhibits an acceptable reproducibility, a good stability and low interferences, which can be used to examine glucose in clinic blood serum samples. This work provides a simple multiphasic reaction system to synthesize binary alloy NCs with well‐controlled componential ratio and opens the avenue to utilize them in biosensing or other advanced technological fields.</p> </abstract>