Direct writing of graphene patterns and devices may significantly facilitate the application of graphene-based flexible electronics. In terms of scalability and cost efficiency, inkjet printing is very competitive ove...Direct writing of graphene patterns and devices may significantly facilitate the application of graphene-based flexible electronics. In terms of scalability and cost efficiency, inkjet printing is very competitive over other existing direct- writing methods. However, it has been challenging to obtain highly stable and clog-free graphene-based ink. Here, we report an alternative and highly efficient technique to directly print a reducing reagent on graphene oxide film to form conductive graphene patterns. By this ＂inkjet reduction＂ method, without using any other microfabrication technique, conductive graphene patterns and devices for various applications are obtained. The ionic nature of the reductant ink makes it clog-free and stable for continuous and large-area printing. The method shows self-limited reduction feature, which enables electrical conductivity of graphene patterns to be tuned within 5 orders of magnitude, reaching as high as 8,000 S.m-1. Furthermore, this method can be extended to produce noble metal/graphene composite patterns. The devices, including transistors, biosensors, and surface- enhanced Raman scattering substrates, demonstrate excellent functionalities. This work provides a new strategy to prepare large-area graphene-based devices that is low-cost and highly efficient, promising to advance research on graphene- based flexible electronics.展开更多
Nanopore-based technologies for the detection of single molecules have shown great promise in many applications,such as DNA sequencing,ion recognition and detection,nucleic acids and proteins detections,and mimicing i...Nanopore-based technologies for the detection of single molecules have shown great promise in many applications,such as DNA sequencing,ion recognition and detection,nucleic acids and proteins detections,and mimicing ions transportation across biological membranes[1,2].The advantages of nanopore-based technologies mainly include high efficiency,versatility,and simple principles.The passage of analytes through a nanopore induces the change of ionic current,which is used for the detection and study of the ions,biomolecules and polymers,etc.[3].展开更多
文摘Direct writing of graphene patterns and devices may significantly facilitate the application of graphene-based flexible electronics. In terms of scalability and cost efficiency, inkjet printing is very competitive over other existing direct- writing methods. However, it has been challenging to obtain highly stable and clog-free graphene-based ink. Here, we report an alternative and highly efficient technique to directly print a reducing reagent on graphene oxide film to form conductive graphene patterns. By this ＂inkjet reduction＂ method, without using any other microfabrication technique, conductive graphene patterns and devices for various applications are obtained. The ionic nature of the reductant ink makes it clog-free and stable for continuous and large-area printing. The method shows self-limited reduction feature, which enables electrical conductivity of graphene patterns to be tuned within 5 orders of magnitude, reaching as high as 8,000 S.m-1. Furthermore, this method can be extended to produce noble metal/graphene composite patterns. The devices, including transistors, biosensors, and surface- enhanced Raman scattering substrates, demonstrate excellent functionalities. This work provides a new strategy to prepare large-area graphene-based devices that is low-cost and highly efficient, promising to advance research on graphene- based flexible electronics.
基金supported by the National Natural Science Foundation of China(21804090)the National Key Research and Development Program of China(2021YFC2102902)+1 种基金the State Key Laboratory of Analytical Chemistry for Life Science(SKLACLS1910)the Science Research Fund of Shaoxing University(20185008)。
文摘Nanopore-based technologies for the detection of single molecules have shown great promise in many applications,such as DNA sequencing,ion recognition and detection,nucleic acids and proteins detections,and mimicing ions transportation across biological membranes[1,2].The advantages of nanopore-based technologies mainly include high efficiency,versatility,and simple principles.The passage of analytes through a nanopore induces the change of ionic current,which is used for the detection and study of the ions,biomolecules and polymers,etc.[3].
