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| 1 | Improved acetone sensing properties of flat sensors based on Co-SnO_(2) composite nanofibers显示文摘Co-SnO_(2) composite nanofibers were synthesized by an electrospinning method and characterized by X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. Gas sensors were fabricated by spinning these nanofibers onto flat ceramic substrates, which had signal electrodes and heaters on their top and bottom surfaces, respectively. Compared with sensors loaded with pure SnO_(2) nanofibers, the Co-SnO_(2) nanofiber sensors exhibited improved acetone sensing properties with high selectivity and rapid response and recovery times. The response was 33 when the sensors were exposed to 100 μL/L acetone at 330°C, and the corresponding response with 100 μL/L of ethanol was only 6. The response and recovery times to acetone were about 5 and 8 s, respectively. These results indicate Co-SnO_(2) composite nanofibers are good candidates for fabrication of high performance acetone sensors for practical application. | HU Lei LI Yi | 2011 | Chinese Science Bulletin2011，56，24： | 4 |
| 2 | Improved ethanol,acetone and H_2 sensing performances of micro-sensors based on loose ZnO nanofibers显示文摘Both one-dimensional nanostructures and porous nanostructures are benefit to the sensing enhancement of semiconducting functional materials.The present paper shows an effective route to combining the advantages of these two nanostructures for a novel type of ZnO nanomaterials.Basically,a pore-forming material is employed in an electrospinning method,and the products are characterized by X-ray powder diffraction(XRD),energy dispersive X-ray spectroscopy(EDX),and transmission electron microscopy(TEM).The obtained materials are loose ZnO nanofibers,which own both porous and one-dimensional nanostructures.Micro-sensors are fabricated by sputtering and etching techniques,and the as-prepared nanofibers are used as the functional materials in them.The sensors show improved sensing properties both in sensitivity and response-speeds.The sensitivity is enhanced from 4 to 8 and the response time is shortened from 14 to 10 s when the sensors are exposed to 100 μL/L ethanol at 260℃.Similar results are also observed in acetone and H2 sensing tests.These enhancements are based on the one-dimensional and porous nanostructures of the nanofibers. | WANG XiuZhi | 2012 | Chinese Science Bulletin2012，57，35： | 3 |
| 3 | 半导体硫化银纳米球的控制合成及室温气敏性显示文摘通过改良的水热方法,成功合成了形貌规则的半导体硫化银(Ag2S)纳米结构,并对样品的形貌、化学成分和微观结构进行了详细的表征.结果发现,样品为表面光滑的球状结构.X-射线衍射仪/光电子谱仪(XRD/XPS)证明,产物具有单斜结构且纯度很高.通过紫外可见吸收光谱发现,与传统粉体材料相比,纳米球吸收峰有明显的蓝移(约20nm).运用表面光电压(surface photovoltage,SPV)技术系统地研究了Ag2S纳米球及传统粉体材料对乙醇气体的室温敏感特性,在同样条件下,纳米球的检测限可达<10mL/m3,而后者仅为50mL/m3.这为Ag2S气敏纳米器件的潜在应用进行了一些探索. | 刘利生 周少敏 苑红磊 陈西良 娄世云 郝耀明 袁瑞建 李宁 | 2011 | 科学通报2011，56，27： | 2 |
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