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MATERIALS LETTERS · 2023 · IF 3

Bismuth doped SnS2 nanoflower for real-time NO2 monitoring at room-temperature

Jianfeng Tan,Weijia Ma,Gaoxiang Meng,Congkui Tian,Yin Wang,Yan Wang,Zhuo Liu

Room temperature (RT) gas sensors have been widely studied because of their low power consumption and easy integration. The low response value and long response/recovery time of gas-sensitive materials have hindered the development of RT gas sensors. In this paper, Bi-doped SnS 2 nanoflowers with high surface area were tailored by a novel hydrothermal method. A fast response/recovery speed of 52/100 s and high response (5.58) were obtained from 3 % Bi doped SnS 2 nanoflower for 1 ppm NO 2 . This work provides a strategy to fabricate RT gas sensors based on layered metal sulfide.

研究领域: 材料科学 · 环境监测

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CHINESE JOURNAL OF ANALYTICAL CHEMISTRY · 2021 · IF 1.134

Ratiometric Electrochemical Detection of MicroRNA Based on Construction of A Hierarchical C@SnS2 Nanoflower Sensing Interface

Qiu-Mei FENG,Li QIN,Peng ZHANG,Dan LI,Ming-Kai LIU,Po WANG

Building a precise, sensitive, and selective sensing platform is highly significant for microRNA (miRNA) detection. Herein, an innovative ratiometric electrochemical biosensor sensitized with carbon nanoparticles-functionalized SnS 2 nanoflowers ( [email protected] 2 NFs) and enzyme-assisted target recycling was explored for analysis of miRNA-21. In this strategy, the application of hierarchical [email protected] 2 NFs structure as electrode material not only enhanced the surface loading capability for subsequent reactions but also improved the interfacial electron transfer. After introducing enzyme-assisted target recycling, single-target miRNA-21 could initiate the cleavage of multiple capture DNA strands by duplex-specific nuclease (DSN), leading to numerous rest single-strand DNAs on the electrode. Two probes, methylene blue-labeled probe 1 (probe 1-MB) and ferrocene-labeled probe 2 (probe 2-Fc), could selectively and competitively hybridize with the capture DNA and the rest single-strand DNA, depending on the completeness of DNA hybridization. By measuring the peak current intensity ratio of Fc and MB, miRNA-21 was quantified in a wide concentration range from 1 fmol/L to 10 pmol/L, with a detection limit of 300 amol/L. Moreover, this sensing system showed good analytical performance in the presence of interfering sequences and complex matrices, illuminating excellent selectivity and practical application potential of the hierarchical [email protected] 2 NF sensing interface.

CAS / MDL: 9012-76-4

研究领域: 生物化学 · 纳米医学 · 分子诊断

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Bismuth doped SnS2 nanoflower for real-time NO2 monitoring at room-temperature

Ratiometric Electrochemical Detection of MicroRNA Based on Construction of A Hierarchical C@SnS2 Nanoflower Sensing Interface