title: High sensitivity hydrogen peroxide and hydrazine sensor based on silver nanocubes with rich {100} facets as an enhanced electrochemical sensing platform.
abstract: We report a novel hydrogen peroxide (H2O2) and hydrazine sensor based on low-cost poly(vinylpyrrolidone)-protected silver nanocubes (PVP-AgNCs). The monodisperse silver nanocubes were prepared by adding a trace amount of sodium sulfide in the conventional polyol synthesis for fast reduction of silver nitrate under protection of argon. The sensor was fabricated by simple casting of PVP-AgNCs aqueous solution on a glassy carbon electrode and the performance was evaluated by cyclic voltammetry and amperometric techniques. It was found that the resulting sensor exhibited extremely good performance toward H2O2 detection with wide linear response ranging from 0.05 to 70mM (R=0.996) at -0.3V and low detection limit of 0.18μM estimated at a signal-to-noise ratio of 3. In addition, the fabricated sensor also exhibited high sensitivity toward the detection of hydrazine with a low detection limit of 1.1μM, wide linear range from 0.005 to 0.46mM (R=0.999) at 0.4V and rapid amperometric response time of less than 2s. For both analytes, the sensor exhibited good reproducibility, selectivity and stability. The excellent performance of the sensor might be attributed to the enhanced electrochemical sensing property of well-defined PVP-AgNCs with rich {100} facets.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
authors.forename: Yinhu
authors.initials: Y
authors.lastname: Wang
authors.forename: Xuejuan
authors.initials: X
authors.lastname: Yang
authors.forename: Jing
authors.initials: J
authors.lastname: Bai
authors.forename: Xiue
authors.initials: X
authors.lastname: Jiang
authors.forename: Gungyin
authors.initials: G
authors.lastname: Fan
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D003217:Conductometry / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006834:Hydrazines / Q000032:analysis / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000032:analysis* / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D012680:Sensitivity and Specificity; D012834:Silver / Q000737:chemistry*
chemical_list: D006834:Hydrazines; C029424:hydrazine; D012834:Silver; D006861:Hydrogen Peroxide