研究目的
To investigate the enhancement of gas sensing properties by decorating Aerographite microtubes with CdTe for ammonia detection.
研究成果
The CdTe-decorated Aerographite microtubes exhibit significantly improved ammonia sensing capabilities at room temperature, with a gas response increased by a factor of five compared to pristine Aerographite structures. The enhanced sensing properties are attributed to additional charge transfer after reaction of NH3 molecules with adsorbed oxygen on the surface of CdTe.
研究不足
The study focuses on ammonia detection and does not explore the sensor's response to a wider range of gases. The temperature during cathodoluminescence experiments could not be accurately controlled due to the porous nature of the sample.
1：Experimental Design and Method Selection:
CdTe was deposited on Aerographite using RF magnetron sputtering to create a polycrystalline thin film. Individual microtubes were then separated and electrically contacted on a SiO2/Si substrate with pre-patterned electrodes.
2：Sample Selection and Data Sources:
Aerographite microtubes were used as the scaffold for CdTe decoration.
3：List of Experimental Equipment and Materials:
FEI Helios Nanolab and Zeiss Ultra Plus microscopes for SEM analysis, FEI Tecnai F30 G2 STwin for TEM investigations, JEOL JSM-6490 equipped with a Gatan monoCL3 setup for cathodoluminescence experiments, Keithley 2400 source meter for electrical measurements.
4：Experimental Procedures and Operational Workflow:
CdTe was sputtered onto Aerographite, individual microtubes were contacted using a FIB/SEM system, and gas sensing properties were measured at room temperature.
5：Data Analysis Methods:
The gas response was calculated using the formula Sgas = |(Rgas?Rair)/Rair| ? 100%, where Rgas and Rair are the device resistances under exposure to gas and air, respectively.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
