基于金修饰的分级多孔单晶氧化锌纳米片的三甲胺传感器

Trimethylamine Sensors Based on Au-Modified Hierarchical Porous Single-Crystalline ZnO Nanosheets.

作者信息

Meng Fanli, Zheng Hanxiong, Sun Yufeng, Li Minqiang, Liu Jinhuai

机构信息

College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.

Department of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu 241000, China.

出版信息

Sensors (Basel). 2017 Jun 22;17(7):1478. doi: 10.3390/s17071478.

It is of great significance for dynamic monitoring of foods in storage or during the transportation process through on-line detecting trimethylamine (TMA). Here, TMA were sensitively detected by Au-modified hierarchical porous single-crystalline ZnO nanosheets (HPSCZNs)-based sensors. The HPSCZNs were synthesized through a one-pot wet-chemical method followed by an annealing treatment. Polyethyleneimine (PEI) was used to modify the surface of the HPSCZNs, and then the PEI-modified samples were mixed with Au nanoparticles (NPs) sol solution. Electrostatic interactions drive Au nanoparticles loading onto the surface of the HPSCZNs. The Au-modified HPSCZNs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive spectrum (EDS), respectively. The results show that Au-modified HPSCZNs-based sensors exhibit a high response to TMA. The linear range is from 10 to 300 ppb; while the detection limit is 10 ppb, which is the lowest value to our knowledge.

通过在线检测三甲胺（TMA）对储存或运输过程中的食品进行动态监测具有重要意义。在此，基于金修饰的分级多孔单晶氧化锌纳米片（HPSCZNs）的传感器对TMA进行了灵敏检测。HPSCZNs通过一锅湿化学法合成，随后进行退火处理。使用聚乙烯亚胺（PEI）修饰HPSCZNs的表面，然后将PEI修饰的样品与金纳米颗粒（NPs）溶胶溶液混合。静电相互作用促使金纳米颗粒负载到HPSCZNs的表面。分别通过X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和能量色散谱（EDS）对金修饰的HPSCZNs进行了表征。结果表明，基于金修饰的HPSCZNs的传感器对TMA表现出高响应。线性范围为10至300 ppb；而检测限为10 ppb，据我们所知这是最低值。