2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers)
This paper presents a high-performance electrochemical sensor for dopamine detection based on gra... more This paper presents a high-performance electrochemical sensor for dopamine detection based on graphene and gold nanoparticles. Experimental results show that the electroneutral gold nanoparticles are capable of enhancing the diffusion of ascorbic acid, improving the selectivity of graphene-based sensors. The optimal sensor with 5 layers of graphene and gold nanoparticles exhibits a low oxidation peak potential of 0.12 V, a high sensitivity of 1.32 µA/µM, a low detection limit of 10 nM, and favorable selectivity. The outstanding performance enables this sensor for possible monitoring the variation of neurotransmitters in vivo.
Traditional lithography plays a significant role in the fabrication of micro- and nanostructures.... more Traditional lithography plays a significant role in the fabrication of micro- and nanostructures. Nevertheless, the fabrication process still suffers from the limitations of manufacturing devices with a high aspect ratio or three-dimensional structure. Recent findings have revealed that shrink polymers attain a certain potential in micro- and nanostructure manufacturing. This technique, denoted as heat-induced shrink lithography, exhibits inherent merits, including an improved fabrication resolution by shrinking, controllable shrinkage behavior, and surface wrinkles, and an efficient fabrication process. These merits unfold new avenues, compensating for the shortcomings of traditional technologies. Manufacturing using shrink polymers is investigated in regard to its mechanism and applications. This review classifies typical applications of shrink polymers in micro- and nanostructures into the size-contraction feature and surface wrinkles. Additionally, corresponding shrinkage mechan...
2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers)
This paper presents a high-performance electrochemical sensor for dopamine detection based on gra... more This paper presents a high-performance electrochemical sensor for dopamine detection based on graphene and gold nanoparticles. Experimental results show that the electroneutral gold nanoparticles are capable of enhancing the diffusion of ascorbic acid, improving the selectivity of graphene-based sensors. The optimal sensor with 5 layers of graphene and gold nanoparticles exhibits a low oxidation peak potential of 0.12 V, a high sensitivity of 1.32 µA/µM, a low detection limit of 10 nM, and favorable selectivity. The outstanding performance enables this sensor for possible monitoring the variation of neurotransmitters in vivo.
Traditional lithography plays a significant role in the fabrication of micro- and nanostructures.... more Traditional lithography plays a significant role in the fabrication of micro- and nanostructures. Nevertheless, the fabrication process still suffers from the limitations of manufacturing devices with a high aspect ratio or three-dimensional structure. Recent findings have revealed that shrink polymers attain a certain potential in micro- and nanostructure manufacturing. This technique, denoted as heat-induced shrink lithography, exhibits inherent merits, including an improved fabrication resolution by shrinking, controllable shrinkage behavior, and surface wrinkles, and an efficient fabrication process. These merits unfold new avenues, compensating for the shortcomings of traditional technologies. Manufacturing using shrink polymers is investigated in regard to its mechanism and applications. This review classifies typical applications of shrink polymers in micro- and nanostructures into the size-contraction feature and surface wrinkles. Additionally, corresponding shrinkage mechan...
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Papers by Wenzheng He