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Liang Shaojun,Zhang Manhong,Zhu Hanming,Yue Song 한국물리학회 2023 Current Applied Physics Vol.49 No.-
Energy filtering effect has been demonstrated an effective strategy to enhance the electrical transport properties and reduce the thermal conductivity of thermoelectric materials. However, to realize the energy filtering effect is so challenging, needing delicate design for specific system, which requires appropriate nano inclusions to well disperse in the pristine matrix and proper interface to produce potential energy barrier. Herein, we report a possible strategy to magnify the energy filtering effect in Cu-doped p-type CuxBi0.5Sb1.5Te3 films prepared by intermittent magnetron co-sputtering technique. Due to the simultaneous optimization of the electrical conductivity and Seebeck coefficient with appreciable magnitude, the power factor shows a 564% enhancement for x = 0.015 in comparison with that of the undoped film. This enhancement is presumably due to a modulable energy filtering effect in the sandwich-structured film system, which provides a potential application for other thermoelectric materials.
Liang Yan,Zhicheng Li,Shaojun Zhang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.7
In this study, a film of electrochemically reduced graphene oxide (ERGO) deposited onto a glassy carbon electrode (GCE) was prepared through the pulse potential method (PPM). The asprepared film was characterized via scanning electron microscopy (SEM) and cyclic voltammetry (CV). The ERGO film was applied for the first time to develop a highly sensitive electrochemical sensor for imidacloprid determination. Results revealed that the ERGO film can effectively increase response towards imidacloprid reduction by significantly enhancing the reduction peak currents and decreasing the over potential of imidacloprid. Under optimum conditions, the modified electrode showed a linear voltammetric response to imidacloprid at concentrations ranging from 3.0 x 10-8 mol L-1 to 1.1 x 10-6 mol L-1, with a detection limit of 1.0 x 10-8 mol L-1. The developed electrode is potentially a good candidate for imidacloprid determination. The proposed method provides a good recovery rate of imidacloprid in spiked practical samples, such as lake water and tap water.
Meng, Dongli,Yang, Shaojun,Guo, Liang,Li, Guoxing,Ge, Jiechao,Huang, Yong,Bielawski, Christopher W.,Geng, Jianxin The Royal Society of Chemistry 2014 Chemical communications Vol.50 No.92
<P>Composites prepared by grafting poly(3-hexylthiophene) (P3HT) onto the surfaces of reduced graphene oxide (RGO) (RGO-<I>g</I>-P3HT) exhibit an enhanced photothermal effect due to photoinduced energy transfer from P3HT to RGO. A remote photo-controlled electrical switch was prepared using RGO-<I>g</I>-P3HT as a photothermal layer.</P> <P>Graphic Abstract</P><P>Photoinduced energy transfer from a conjugated system to graphene sheets enables the enhanced photothermal effect of graphene-based composites. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cc06849a'> </P>