Intelligent responsive devices are crucial for a variety of applications ranging from smart electronics to robotics.Electro-responsive cholesteric liquid crystals(CLC)have been widely applied in display panels,smart w...Intelligent responsive devices are crucial for a variety of applications ranging from smart electronics to robotics.Electro-responsive cholesteric liquid crystals(CLC)have been widely applied in display panels,smart windows,and so on.In this work,we realize the mechanical stimuli-triggered optical responses of the CLC by integrating it with a triboelectric nanogenerator(TENG),which converts the mechanical motion into alternating current electricity and then tunes the different optical responses of the CLC.When the voltage applied on the CLC is relatively low(15–40 V),the TENG drives the switching between the bistable planar state and focal conic state of the CLC,which shows potential applications in selfpowered smart windows or E-paper displays.When the voltage supplied by the TENG is larger than60 V,a self-powered optical switch is demonstrated by utilizing the transformation between focal conic state and instantons homeotropic state of the CLC.This triboelectric-optical responsive device consumes no extra electric power and suggests a great potential for future smart electronics.展开更多
To avoid environmental pollution due to organic dye solutions,the electrophoresis and degradation of dye in organic solvents such as alcohol were investigated.Many dyes were tested in the Indium tin oxide(ITO)electrod...To avoid environmental pollution due to organic dye solutions,the electrophoresis and degradation of dye in organic solvents such as alcohol were investigated.Many dyes were tested in the Indium tin oxide(ITO)electrode driving cell,and about 15 dyes moved under voltage driving.Both the curves of ultraviolet-visible(UV-Vis)and infrared(IR)spectra of the electrophoresis samples showed that the metal complexes Red 04 and Acid Black 1 were degradable in alcohol solution by electrochemical reaction.The cyclic volt-ampere curves of the samples from the electrochemi-cal working station proved that electrochemical reactions took place.Based on the analysis of UV-Vis and IR spectra,the electrochemical degradation products of azo and metal complex azo dyes at lower voltage driving(1–5 V)in organic solvents are oxidized azobenzene,not hydrazine,which was found in the electrochemical degradation of dye water solutions.When the ITO electrode is modified by a polyimide(PI)film to a thickness less than 4μm,the electrochemical degradation of the dye in alcohol solution will not appear in the cyclic volt-ampere curves.A dye electrophoresis in organic solution flexible prototype e-paper display was formed and the display picture is shown.展开更多
基金supported by the National Key Research and Development Program of China(2016YFA0202702)the Youth Innovation Promotion Association of CAS。
文摘Intelligent responsive devices are crucial for a variety of applications ranging from smart electronics to robotics.Electro-responsive cholesteric liquid crystals(CLC)have been widely applied in display panels,smart windows,and so on.In this work,we realize the mechanical stimuli-triggered optical responses of the CLC by integrating it with a triboelectric nanogenerator(TENG),which converts the mechanical motion into alternating current electricity and then tunes the different optical responses of the CLC.When the voltage applied on the CLC is relatively low(15–40 V),the TENG drives the switching between the bistable planar state and focal conic state of the CLC,which shows potential applications in selfpowered smart windows or E-paper displays.When the voltage supplied by the TENG is larger than60 V,a self-powered optical switch is demonstrated by utilizing the transformation between focal conic state and instantons homeotropic state of the CLC.This triboelectric-optical responsive device consumes no extra electric power and suggests a great potential for future smart electronics.
基金The study was financially supported by a funding project for academic human resources development in the Institutions of Higher Learning under the jurisdiction of Beijing Municipality(PHR,IHLB).
文摘To avoid environmental pollution due to organic dye solutions,the electrophoresis and degradation of dye in organic solvents such as alcohol were investigated.Many dyes were tested in the Indium tin oxide(ITO)electrode driving cell,and about 15 dyes moved under voltage driving.Both the curves of ultraviolet-visible(UV-Vis)and infrared(IR)spectra of the electrophoresis samples showed that the metal complexes Red 04 and Acid Black 1 were degradable in alcohol solution by electrochemical reaction.The cyclic volt-ampere curves of the samples from the electrochemi-cal working station proved that electrochemical reactions took place.Based on the analysis of UV-Vis and IR spectra,the electrochemical degradation products of azo and metal complex azo dyes at lower voltage driving(1–5 V)in organic solvents are oxidized azobenzene,not hydrazine,which was found in the electrochemical degradation of dye water solutions.When the ITO electrode is modified by a polyimide(PI)film to a thickness less than 4μm,the electrochemical degradation of the dye in alcohol solution will not appear in the cyclic volt-ampere curves.A dye electrophoresis in organic solution flexible prototype e-paper display was formed and the display picture is shown.
