CNT

Organophosphorus pesticides (OPPs), widely known as persistent organic pollutants, are the most popular contaminants in agriculture products in developing countries. The determination of OPPs in complex matrices, such as food, environmental and biological samples, usually requires extensive sample pretreatment. This review focuses on the sorptive extraction techniques applied as sample pretreatment for OPPs in complex matrices, including solid-phase extraction (SPE) and solid-phase microextraction (SPME).

Development of Stretchable PZT/PDMS Nanocomposite Film with CNT ElectrodeFlexible piezoelectric film;PZT;PDMS;CNT;The piezoelectric composite film of ferroelectric PZT ceramic ($PbZr_xTi_{1-x}O_3$) and polymer (PDMS, Polydimethylsiloxane) was prepared to improve the flexibility of piezoelectric material. The bar coating method was applied to fabricate flexible nanocomposite film with large surface area by low cost process.

Temperature-dependent Resistance Change of Conductive CNT Thin-filmCNT;PDMS;Encapsulation;Thermal sensitivity;This paper reports the resistance change of conductive carbon nanotube (CNT) thin-films according to the temperature variation. Resistance of conductive CNT thin-films intrinsically has good thermal sensitivity, but shows environmental dependency. In order to reduce environmental effects, we spin-coated polydimethylsiloxane (PDMS) on the conductive CNT thin-films.

油水分离技术在这些年来一直在不断进步。近来，重力辅助过滤得到了相当多的关注，尽管大部分研究集中在重力作用下容易分离的油水合成混合物。对于机械稳定和化学稳定的乳状液，除静态重力头外，不需要外加外部压力就可以分离是一个挑战。要实现这一目标，过滤介质应具有高孔隙率，以获得高通量，但要控制孔径，以获得高选择性。而且，为了分解乳液，过滤介质表面应赋予超润湿特性。本文综合评述了不同的多孔过滤介质(金属网、有机膜、无机膜、滤纸和三维材料)及其相应的改性技术和/或功能化策略，以改善其性能，实现高效重力驱动过滤应用。

基于自供电触头电气化的柔性NO2气体传感器在室温下已被一种简单、经济有效的能量产生方法所研究。将垂直表面修饰的聚二甲基硅氧烷( PDMS )接触到石墨烯或3D-石墨烯/ CNT网络后，结果机械能转化为电能。在相对湿度为40 ~ 45 %的环境中，石墨烯和3D-石墨烯/ CNT样品的峰峰开路电压分别在6.2   V和25.4   V左右。然后，一系列极低的NO2气体浓度在ppb级系统地控制了自供电传感器输出的产生电压。由于3D -石墨烯/ CNT与表面修饰的PMDS之间具有较大的面积接触、高效的摩擦电效应，自供电NO2气体传感器在高灵敏度、机械鲁棒性、稳定性和线性等方面表现出良好的性能。在10ppb NO2下，3D-石墨烯/ CNT的输出电压和传感器响应分别得到约23.1   V和9.1 %。还考察了湿度对传感器响应和制备传感器选择性的影响。因此，本文的工作激发了基于摩擦电纳米发电机的自供电系统在气敏领域的实用性和创新性。