Wanlin Dai,Wenyuan Zhao,Ying Ma,Jianshan Ye,Jiye Jin
We developed a miniaturized electrochemiluminescence (ECL) instrument coupled with a light-emitting diode-based bipolar electrochemical sensor (LED-BPES). This instrument composes of a microcontroller circuit, a power supply circuit, a potentiostat, an optical detecting circuit, and a communication circuit. The multi-pixel photon counter (MPPC), which is low-cost, small-size, and wide-range in optical measurements, is chosen as the optical detector. The LED-BPES composes of a disposable screen-printed carbon electrode (SPCE) and a surface-mount red LED. Depended on the closed bipolar electrode (C-BPE) structure, the LED-BPES not only avoids the employment of unstable and complex ECL reactions but also offers a cost-effective alternative for the over-priced ECL reagents by using a mini-size commercial LED as the luminescent producer. The combination of MPPC and LED-BPES helps to set up the simplified and downsized instrument system with low price and high efficiency. The presented instrument coupled with LED-BPES works excellent in electroactive molecules detection and has great potential in the application of heavy metal ions detection.
Junlong Niu,Jiaqiang Zhang,Yi Wang,Lei Hu,Shengwei Tang,Zhongquan Wan,Chunyang Jia,Xiaolong Weng,Longjiang Deng
Multifunctional electrochromic devices with diversified functions are highly desirable for intelligent electronic systems compared to conventional electrochromic devices with sole applicability. Herein, a multifunctional electrochromic device integrated with variable optical, thermal management and energy storage is realized by preparing nanowire‐structured coral-like PANI films on a flexible gold-plated membrane through the combination of galvanostatic and cyclic voltammetric electrodeposition techniques. The multifunctional electrochromic devices achieve reversible color changes between brownish-yellow, green and dark-green. The maximum emissivity changes of the multifunctional electrochromic device in the ranges of 3–5 μm, 8–14 μm and 2.5–15 μm are 0.42, 0.49 and 0.47, respectively. Moreover, a specific capacitance of 355 F g −1 is obtained for the multifunctional electrochromic devices at a current density of 1 A g −1 . The multifunctional electrochromic devices also have such advantages as light-weight, thin-thickness, flexible and can be fabricated in a multipixel and large area. With versatility characteristics, the multifunctional electrochromic devices are highly promising for intelligent electronic systems in electronic clothing, military camouflage and thermal control system of spacesuits.
危险品化学品经营许可证（带存储）