研究目的
Investigating the therapeutic effects of a specific herbal medicine on a particular disease.
研究成果
The study successfully demonstrates the fabrication of a highly sensitive and selective H2S sensor using plasma oxidized W-WOx core-shell nanowires. The addition of nanodiscs significantly enhances the sensor's response, with the 20 nm diameter nanodiscs showing the highest response. The sensor exhibits excellent stability over six months and a low detection limit, making it suitable for practical applications in H2S leak detection.
研究不足
The study is limited by the need for controlled plasma oxidation conditions to achieve the desired core-shell structure. Additionally, the sensor's performance is temperature-dependent, with optimal performance at specific temperatures. The fabrication process, especially the patterning of nanodiscs, may also limit scalability.
1：Experimental Design and Method Selection:
The study involves the synthesis of plasma oxidized, suspended tungsten-tungsten oxide (W-WOx) core-shell nanowire for sensing ppb level H2S. The methodology includes controlling the plasma oxidation process to achieve a core-shell structure with an optimal W/WOx ratio.
2：2S. The methodology includes controlling the plasma oxidation process to achieve a core-shell structure with an optimal W/WOx ratio. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: The samples used are W-WOx core-shell nanowires with and without nanodiscs of varying diameters (20 nm, 50 nm, and 100 nm). Data is collected on their response to H2S at different concentrations and temperatures.
3：List of Experimental Equipment and Materials:
Equipment includes an inductively coupled plasma (ICP) system for oxidation, electron beam lithography (EBL) for patterning nanodiscs, and various characterization tools like UV-Vis spectroscopy, XPS, and TEM. Materials include tungsten for the nanowire and nanodiscs.
4：Experimental Procedures and Operational Workflow:
The process involves fabricating the nanowire, oxidizing it under controlled conditions, patterning nanodiscs on the nanowire, and then testing its response to H2S.
5：2S. Data Analysis Methods:
5. Data Analysis Methods: The response of the sensors is analyzed based on the change in conductance upon exposure to H2S, with the response time and recovery time being key metrics.
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