Entanglement between particles is a crucial resource in quantum information processing, an important example of which is the exploitation of entangled photons in quantum communication protocols. Among the different av...Entanglement between particles is a crucial resource in quantum information processing, an important example of which is the exploitation of entangled photons in quantum communication protocols. Among the different available sources of entangled photons, semiconductor quantum dots （QDs） excel owing to their deterministic emission properties, potential for electrical injections, and direct compatibility with semiconductor manufacturing techniques. Despite the great promises, QD-based sources at＇e far from being ideal. In particular, such sources present several critical issues, which require the overcoming of challenges pertaining to spectral tunability, entanglement fidelity, photon indistinguishability and brightness. In this article, we will discuss the potential solutions to these problems and review the recent progress in the field.展开更多
Three-dimensional(3D)graphene networks are performance boosters for functional nanostructures in energy-related fields.Although tremendous intriguing nanostructures-decorated 3D graphene networks have been realized,on...Three-dimensional(3D)graphene networks are performance boosters for functional nanostructures in energy-related fields.Although tremendous intriguing nanostructures-decorated 3D graphene networks have been realized,on-demand decoration of nanostructures in the specified position of interest within the whole 3D graphene skeleton is still out of reach,shedding limitations on constructing more sophisticated components with programmable structures which offer enormous potential for the enhancement of performance and exploration of new functions.Here,we report the melamine-sponge(MS)-templated hydrothermal method capable of realizing reduced graphene oxide(RGO)-nanostructure composite aerogels with programmable structures and compositions.The key of this method is using the MS template to preset the structures of choice through programmable solution-processed immobilization of graphene oxide(GO)and nanostructures.Remarkably,the hydrothermal treatment simultaneously removed the MS template and reduced the GO networks without changing the preset structures.We showcased nine typical RGO-nanostructures composite aerogels to demonstrate the versatility of the MS-templated hydrothermal method.展开更多
Electrolytes make up a large portion of the volume of energy storage devices,but they often do not contribute to energy storage.The ability of using electrolytes to store charge would promise a significant increase in...Electrolytes make up a large portion of the volume of energy storage devices,but they often do not contribute to energy storage.The ability of using electrolytes to store charge would promise a significant increase in energy density to meet the needs of evolving electronic devices.Redox-flow batteries use electrolytes to store energy and show high energy densities,but the same design cannot be applied to portable or microdevices that require static electrolytes.Therefore,implementing electrolyte energy storage in a non-flow design becomes critical.This review summarizes the requirements for a stable and efficient electrolyte and diverse redox-active species dissolved in aqueous solutions.More importantly,we review the pioneering works using static electrolyte energy storage in the hope that it will pave a new way to design compact and energy-dense batteries.展开更多
文摘Entanglement between particles is a crucial resource in quantum information processing, an important example of which is the exploitation of entangled photons in quantum communication protocols. Among the different available sources of entangled photons, semiconductor quantum dots （QDs） excel owing to their deterministic emission properties, potential for electrical injections, and direct compatibility with semiconductor manufacturing techniques. Despite the great promises, QD-based sources at＇e far from being ideal. In particular, such sources present several critical issues, which require the overcoming of challenges pertaining to spectral tunability, entanglement fidelity, photon indistinguishability and brightness. In this article, we will discuss the potential solutions to these problems and review the recent progress in the field.
基金S.-H.Y.acknowledges the funding support from the National Natural Science Foundation of China(grant nos.21431006 and 21761132008)the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(grant no.21521001)+2 种基金Key Research Program of Frontier Sciences,CAS(grant no.QYZDJ-SSW-SLH036)the Users with Excellence and Scientific Research Grant of Hefei Science Center of CAS(grant no.2015HSC-UE007)O.G.S.is appreciative of the financial support from the Leibniz Program of the German Research Foundation.
文摘Three-dimensional(3D)graphene networks are performance boosters for functional nanostructures in energy-related fields.Although tremendous intriguing nanostructures-decorated 3D graphene networks have been realized,on-demand decoration of nanostructures in the specified position of interest within the whole 3D graphene skeleton is still out of reach,shedding limitations on constructing more sophisticated components with programmable structures which offer enormous potential for the enhancement of performance and exploration of new functions.Here,we report the melamine-sponge(MS)-templated hydrothermal method capable of realizing reduced graphene oxide(RGO)-nanostructure composite aerogels with programmable structures and compositions.The key of this method is using the MS template to preset the structures of choice through programmable solution-processed immobilization of graphene oxide(GO)and nanostructures.Remarkably,the hydrothermal treatment simultaneously removed the MS template and reduced the GO networks without changing the preset structures.We showcased nine typical RGO-nanostructures composite aerogels to demonstrate the versatility of the MS-templated hydrothermal method.
基金M Zhu acknowledges the support by the German Research Foundation DFG(ZH 989/2-1)O G Schmidt acknowledges financial support by the Leibniz Program of the German Research Foundation(SCHM 1298/26-1)H Tang,Z Qu,W Zhang and H Zhang acknowledge the support and funding from China Scholarship Council(CSC).
文摘Electrolytes make up a large portion of the volume of energy storage devices,but they often do not contribute to energy storage.The ability of using electrolytes to store charge would promise a significant increase in energy density to meet the needs of evolving electronic devices.Redox-flow batteries use electrolytes to store energy and show high energy densities,but the same design cannot be applied to portable or microdevices that require static electrolytes.Therefore,implementing electrolyte energy storage in a non-flow design becomes critical.This review summarizes the requirements for a stable and efficient electrolyte and diverse redox-active species dissolved in aqueous solutions.More importantly,we review the pioneering works using static electrolyte energy storage in the hope that it will pave a new way to design compact and energy-dense batteries.
