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Gao, Rui; Ying, Yi‐Lun; Li, Yuan‐Jie; Hu, Yong‐Xu; Yu, Ru‐Jia; Lin, Yao; Long, Yi‐Tao
Angewandte Chemie International Edition, January 22, 2018, Letnik: 57, Številka: 4Journal Article
Clarifying the hidden but intrinsic feature of single nanoparticles by nanoelectrochemistry could help understand its potential for diverse applications. The uncontrolled interface and bandwidth limitation in the electrochemical measurement put the obstacle in single particle collision. Here, we demonstrate a well‐defined 30 nm nanopore electrode with a rapid chemical‐electrochemical fabrication method which provides a high reproducibility in both size and performance. A capacitance‐based detection mechanism is demonstrated to achieve a high current resolution of 0.6 pA ±0.1 pA (RMS) and a high the temporal resolution of 0.01 ms. By utilizing this electrode, the dynamic interactions of every single particle in the mixture could be directly read during the collision process. The collision frequency is two orders of magnitude higher than previous reports, which helps reveal the hidden features of nanoparticles during the complex and multidimensional interaction processes. Probing for nanoparticles: A 30 nm confined nanopore electrode (CNE) was fabricated to directly recognize intrinsic collision information of single nanoparticles of different sizes. The rapid method and controlled nanopore dimensions enable a high reproducibility. A new detection mechanism enables 0.01 ms ultrasensitive collision detection with high current resolution and collision frequency.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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