University of Science and Technology Beijing

About: University of Science and Technology Beijing is a education organization based out in Beijing, China. It is known for research contribution in the topics: Microstructure & Alloy. The organization has 41558 authors who have published 44473 publications receiving 623229 citations. The organization is also known as: Beijing Steel and Iron Institute.

Multifunctional conductive hydrogel-based flexible wearable sensors

Abstract: Flexible sensors have shown great potential in remote health monitoring, body movements track, electronic skin, human-machine interfaces, and soft robotics. Hydrogels possess exceptional stretchability, flexibility and biocompatibility that render them appealing candidates for wearable flexible sensors. Among them, considerable efforts have been devoted to developing conductive hydrogels to achieve multifunctional wearable sensing through using functional groups/additives/nanofillers to modify the hydrogel network in recent years. This review summarizes recent advances of applications of hydrogels in flexible wearable sensors, such as sweat sampling and flexible electrodes, strain/pressure sensors and touch panels, focuses on the multifunctional conductive hydrogels-based flexible wearable sensors with self-healing, self-adhesion, or anti-freezing capabilities. A brief introduction to representative synthesis methods and strategies of conductive hydrogels is also presented. In the end, we also provide a personal perspective on the future development, and address the remaining challenges in the commercialization of conductive hydrogels-based multifunctional flexible wearable sensors.

Recyclable and Green Triboelectric Nanogenerator

Abstract: A recyclable and green triboelectronic nanogenerator (TENG) is developed based on triboelectrification and designed cascade reactions. Once triggered by water, the TENG can fully dissolve and degrade into environmentally benign end products. With features of rapid dissolution, reproductivity, and green electronic, the TENG has potential of serving as clearable energy harvester and nanosensor for health monitoring and motion sensing.

Improvement of Thermoelectric Performance of CoSb3-xTex Skutterudite Compounds by Additional Substitution of IVB-Group Elements for Sb

Abstract: An enhanced ZT value as high as 1.1 at ∼550 °C has been achieved in n-type nanostructured CoSb3−xTex skutterudite compounds through additional substitution of IVB-group elements (Si, Ge, Sn, Pb) for Sb. Particularly, Sn was found to be the most effective element to enhance the ZT value by extending the solubility limit of Te in CoSb3−xTex, which decreases thermal conductivity more significantly than electrical conductivity. The reduced thermal conductivity is confirmed by the Raman scattering measurement of CoSb2.86M0.02Te0.12 (M = Si, Ge, Sn, Pb), which shows that Ge and Sn enter into the Sb-site of CoSb3 and generate significant changes in the vibration modes, whereas Si and Pb are not likely to get into the lattice of CoSb3. Furthermore, nanostructure with fine grains and “nanodots” also contributes to the reduction of thermal conductivity.