Awide range of tunability in the physical parameters of as emiconductor used for X-ray detection is desirable to achieve targeted performance optimization. However,i n adense-phase semiconductor,fine-tuning one parameter often leads to unwanted changes in other parameters.H erein, the intrinsic openness in an open-framework semiconductor has been confirmed, for the first time,tobeakey structural factor that weakens the mutual exclusivity of the adjustable physical parameters owingt oan on-linear control mechanism. The controllable doping of Si nazeolitic In-Se host results in an optimal balance between resistivity,b and gap,a nd carrier mobility,w hich finally results in an excellent X-rayd etector with ah igh figure of merit for the mobility-lifetime product (7.12 10 À4 cm 2 V À1); this value is superior to that of ac ommercial a-Se detector.T he current strategy of choosing openframework semiconductor materials opens an ew windowf or targeting high-performance X-ray detection.
In this study, a novel mercapto-terminated trinuclear Ni(II) complex (Ni3) was synthesized and used as electrocatalysts for the detection of hydrazine hydrate in real water samples. The as-prepared Ni3 molecules possess six thiomethyl groups at the periphery of the complex;such SCH 3 groups can react with Au electrodesto immobilize the Ni3 molecules on their surface through the formation of a self-assembled monolayer. The Ni3-modified Au electrode (Ni3/Au) demonstratedits excellent electrocatalytic activity for the oxidation of hydrazine hydrate through the significant decrease in the overpotential.Chronoamperometry study showed a diffusion coefficient (D) of 5.82×10 −5 cm 2 ·s −1 and acatalytic rate constant of 8.57×10 3 M −1 ·s −1 . Using square wave voltammetry (SWV) technique, this Ni3/Au electrodebased hydrazine hydratesensor exhibiteda high sensitivity in quantitive analysis, and the detection limit could be as low as ~0.07 μM with a linearity ranging from 0.2 to 50 μM. Additionally, the good reproducibility, anti-interference performance, and long-term stability made the proposedsensor be capable of detecting trace level of hydrazine hydrate in real water samples.
An open-framework semiconductor … … is demonstrated to have an advantage over its dense-phase counterpart when used as a high-performance X-ray detector because of its optimal balance between resistivity and band gap, as reported by T. Wu and co-workers in their Research Article on page 18605. The image depicts a sulfur-doped zeolitic In-Se material serving as an excellent X-ray detector with a high figure of merit for the mobility-lifetime product.
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