The liquid metals exhibit both the properties of liquids and metals and have a low melting point near room temperature.As a lowcost and easy-to-obtain flexible substrate,paper has significant advantages for large-area...The liquid metals exhibit both the properties of liquids and metals and have a low melting point near room temperature.As a lowcost and easy-to-obtain flexible substrate,paper has significant advantages for large-area and multilayer flexible circuit fabrication.This has led to a growing interest in liquid metal-based paper electronics among both scientists and industry.In order to promote the development and application of liquid metal-based paper electronics,this review will summarize and analyze the progress from three perspectives,including liquid metal inks,printing methods,and their applications.A variety of liquid metalbased electronic inks are introduced,and their advantages and disadvantages are discussed.Then,a comparison of typical fabrication methods has been presented,including chemical interaction-based selective adhesion and surface roughness-based transfer printing.A number of emerging applications used and expected to be applied to liquid metal-based paper electronics have been demonstrated.Finally,paper electronics based on liquid metals are discussed along with their challenges and opportunities for the further development.In the future,further investigations and applications of paper electronics based on liquid metals are expected.展开更多
Achieving high performance in molecular scale diode devices remains a formidable challenge due to the complexity of the charge transport process and the difficulty in device structure modulation.Herein,we demonstrated...Achieving high performance in molecular scale diode devices remains a formidable challenge due to the complexity of the charge transport process and the difficulty in device structure modulation.Herein,we demonstrated a low-cost and fast screening strategy to search for proper electroactive units and construct high performance self-assembled monolayer(SAM)-based molecular diodes.The strategy is based on off-the-shelf carboxylate-terminated alkane thiols and simple carboxylate-metal ion complexes,structures denoted as Au-S-(CH2)n-1COO−Mm+(Cn+Mm+),where n=11,12,13,14,16,18,and Mm+=Ca^(2+),Mn^(2+),Fe_(2)+,Fe3+,Co^(2+),Ni^(2+),Cu^(2+),and Zn^(2+),as the library of functional SAM layers on gold substrate.Combing the fast screening measurements using a eutectic indium-gallium alloy top contact(EGaIn),C18+Ca^(2+)and C18+Zn^(2+)structures were found to afford record high rectification ratio(RR)>700 at±1.5 V.Theoretical analysis based on a single level tunneling model shows that the C18+Ca^(2+)and C18+Zn^(2+)devices possessed an optimized combination of asymmetric voltage division,energy offset,and coupling of carboxylate-metal complexes with the electrode.This newly developed method represents a general strategy for fast,inexpensive,and effective exploration of the functional metal complex chemical space,and can largely accelerate the development of practical high performance molecular diode devices.展开更多
基金supported by the Key Research and Development Program of Zhejiang Province(Grant No.2022C04004)。
文摘The liquid metals exhibit both the properties of liquids and metals and have a low melting point near room temperature.As a lowcost and easy-to-obtain flexible substrate,paper has significant advantages for large-area and multilayer flexible circuit fabrication.This has led to a growing interest in liquid metal-based paper electronics among both scientists and industry.In order to promote the development and application of liquid metal-based paper electronics,this review will summarize and analyze the progress from three perspectives,including liquid metal inks,printing methods,and their applications.A variety of liquid metalbased electronic inks are introduced,and their advantages and disadvantages are discussed.Then,a comparison of typical fabrication methods has been presented,including chemical interaction-based selective adhesion and surface roughness-based transfer printing.A number of emerging applications used and expected to be applied to liquid metal-based paper electronics have been demonstrated.Finally,paper electronics based on liquid metals are discussed along with their challenges and opportunities for the further development.In the future,further investigations and applications of paper electronics based on liquid metals are expected.
基金supported by the National Natural Science Foundation of China(grant nos.21973069 and 21773169)the National Key R&D Program(grant nos.2017YFA0204503 and 2016YFB0401100)+1 种基金the PEIYANG Young Scholars Program of Tianjin University(grant no.2018XRX-0007)the Industry-University-Research Cooperation Program of Tianjin University and Qinghai Nationalities University(grant no.2021XZC-0064).
文摘Achieving high performance in molecular scale diode devices remains a formidable challenge due to the complexity of the charge transport process and the difficulty in device structure modulation.Herein,we demonstrated a low-cost and fast screening strategy to search for proper electroactive units and construct high performance self-assembled monolayer(SAM)-based molecular diodes.The strategy is based on off-the-shelf carboxylate-terminated alkane thiols and simple carboxylate-metal ion complexes,structures denoted as Au-S-(CH2)n-1COO−Mm+(Cn+Mm+),where n=11,12,13,14,16,18,and Mm+=Ca^(2+),Mn^(2+),Fe_(2)+,Fe3+,Co^(2+),Ni^(2+),Cu^(2+),and Zn^(2+),as the library of functional SAM layers on gold substrate.Combing the fast screening measurements using a eutectic indium-gallium alloy top contact(EGaIn),C18+Ca^(2+)and C18+Zn^(2+)structures were found to afford record high rectification ratio(RR)>700 at±1.5 V.Theoretical analysis based on a single level tunneling model shows that the C18+Ca^(2+)and C18+Zn^(2+)devices possessed an optimized combination of asymmetric voltage division,energy offset,and coupling of carboxylate-metal complexes with the electrode.This newly developed method represents a general strategy for fast,inexpensive,and effective exploration of the functional metal complex chemical space,and can largely accelerate the development of practical high performance molecular diode devices.
基金supported by the National Natural Science Foundation of China(52173237 and 51903068)the Natural Science Foundation of Heilongjiang Province,China(YQ2020E001)。
基金the National Natural Science Foundation of China(51872116 and 12034002)the Project for Self-Innovation Capability Construction of Jilin Province Development and Reform Commission(2021C026)+2 种基金the Program for JLU Science and Technology Innovative Research Team(JLUSTIRT-2017TD-09)the Science and Technology Development Program of Jilin Province(20190201233JC)the Fundamental Research Funds for the Central Universities.The work was carried out at LvLiang Cloud Computing Center of China,and the calculations were performed on TianHe-2.
