Department of Physics, Faculty of Science and Technology, Thammasat University , Pathum Thani, Thailand.
Department of Electronic Materials Engineering, Kwangwoon University , Seoul, Korea.
ACS Appl Mater Interfaces. 2017 Mar 15;9(10):8796-8804. doi: 10.1021/acsami.7b00673. Epub 2017 Mar 1.
Ultrasensitive room-temperature operable gas sensors utilizing the photocatalytic activity of Na-doped p-type ZnO (Na:ZnO) nanoflowers (NFs) are demonstrated as a promising candidate for diabetes detection. The flowerlike Na:ZnO nanoparticles possessing ultrathin hierarchical nanosheets were synthesized by a facile solution route at a low processing temperature of 40 °C. It was found that the Na element acting as a p-type dopant was successfully incorporated in the ZnO lattice. On the basis of the synthesized p-type Na:ZnO NFs, room-temperature operable chemiresistive-type gas sensors were realized, activated by ultraviolet (UV) illumination. The Na:ZnO NF gas sensors exhibited high gas response (S of 3.35) and fast response time (∼18 s) and recovery time (∼63 s) to acetone gas (100 ppm, UV intensity of 5 mW cm), and furthermore, subppm level (0.2 ppm) detection was achieved at room temperature, which enables the diagnosis of various diseases including diabetes from exhaled breath.
利用掺钠 p 型 ZnO（Na:ZnO）纳米花（NFs）的光催化活性，研制出了超灵敏的室温运行气体传感器，有望成为糖尿病检测的候选方案。通过在 40°C 的低温处理下采用简便的溶液路线，合成了具有超薄分级纳米片的花状 Na:ZnO 纳米粒子。结果发现，Na 元素成功掺入 ZnO 晶格，作为 p 型掺杂剂。基于合成的 p 型 Na:ZnO NFs，实现了室温运行的电阻型气敏传感器，通过紫外（UV）光照射进行激活。在丙酮气体（100 ppm，UV 强度为 5 mW cm）存在下，Na:ZnO NF 气敏传感器表现出高气体响应（S 为 3.35）和快速响应时间（约 18 s）和恢复时间（约 63 s），此外，在室温下实现了亚 ppm 级（0.2 ppm）的检测，这使得能够从呼气中诊断出包括糖尿病在内的各种疾病。
Zotero 插件