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3 results on '"Chongan Di"'

1. Monolayer Two‐dimensional Molecular Crystals for an Ultrasensitive OFET‐based Chemical Sensor

Author

Haiyang Li, Yanjun Shi, Guangchao Han, Jie Liu, Jing Zhang, Chunlei Li, Yuanping Yi, Tao Li, Xike Gao, Chongan Di, Jia Huang, Yanke Che, Dong Wang, Wenping Hu, Yunqi Liu, and Lang Jiang

Subjects
Detection limit, Analyte, Materials science, Organic field-effect transistor, 010405 organic chemistry, Communication, Diffusion, Nanotechnology, General Medicine, General Chemistry, Crystal structure, sensors, 010402 general chemistry, 01 natural sciences, Communications, Catalysis, Chemical sensor, 0104 chemical sciences, Porous Crystals | Very Important Paper, organic field-effect transistors (OFETs), monolayer molecular crystals (MMCs), porous crystals, Monolayer, Porosity
Abstract

The sensitivity of conventional thin‐film OFET‐based sensors is limited by the diffusion of analytes through bulk films and remains the central challenge in sensing technology. Now, for the first time, an ultrasensitive (sub‐ppb level) sensor is reported that exploits n‐type monolayer molecular crystals (MMCs) with porous two‐dimensional structures. Thanks to monolayer crystal structure of NDI3HU‐DTYM2 (NDI) and controlled formation of porous structure, a world‐record detection limit of NH3 (0.1 ppb) was achieved. Moreover, the MMC‐OFETs also enabled direct detection of solid analytes of biological amine derivatives, such as dopamine at an extremely low concentration of 500 ppb. The remarkably improved sensing performances of MMC‐OFETs opens up the possibility of engineering OFETs for ultrasensitive (bio)chemical sensing., MMCs make sense: Two‐dimensional porous and nonporous monolayer molecular crystals (MMCs) of NDI3HU‐DTYM2 (NDI) were controllably synthesized by drop‐casting on different substrates. Both MMC sensors based on organic field‐effect transistors show high‐sensitivity performance to NH3 vapor. The porous MMC showed relative sensitivity of 72 % upon exposure to 0.1 ppb NH3, while the fluorescent intensity decreased by 40.9 % when exposed to 10 ppb NH3.

Published
2020

2. High-performance transistor based on individual single-crystalline micrometer wire of perylo[1, 12-b,c,d]thiophene

Author

Yanming Sun, Lin Tan, Shidong Jiang, Hualei Qian, Zhaohui Wang, Dongwei Yan, Chongan Di, Ying Wang, Weiping Wu, Gui Yu, Shouke Yan, Chunru Wang, Wenping Hu, and Yunqi Liu

Subjects
Field-effect transistors -- Design and construction, Scanning electron microscopes -- Observations, Thiophene -- Structure, Thiophene -- Optical properties, X-rays -- Diffraction, X-rays -- Analysis, Chemistry
Abstract

A new class of high-performance organic field effect transistor (OFET) semiconductor based on perylo[1, 12,b,c,d]thiophene (PET) is analyzed. The analysis has shown that the extraordinary solid-state packing arrangement with the likelihood of double-channel fashion induced by marked S...S interactions have contributed to the high performance.

Published
2007

3. Organic thin-film transistors with high mobilities and low operating voltages based on 5,5′-bis-biphenyl-dithieno[3,2-b:2′,3′-d]thiophene semiconductor and polymer gate dielectric.

Author

Yanming Sun, Yunqi Liu, Yongqiang Ma, Chongan Di, Ying Wang, Weiping Wu, Gui Yu, Wenping Hu, and Daoben Zhu

Subjects
THIN film transistors, ORGANIC thin films, THIN films, TRANSISTORS, SEMICONDUCTORS, DIELECTRICS
Abstract

Employing 5,5′-bis-biphenyl-dithieno[3,2-b:2′,3′-d]thiophene (BPDTT) as semiconducting layer and poly(vinyl alcohol) (PVA) as gate dielectric layer, we have fabricated organic thin-film transistors. These devices exhibit excellent field-effect performances with a high mobility of up to 0.6 cm2/V s and a very low operating voltage (<1 V) at room temperature. The single crystal of BPDTT was grown and analyzed. The high performances are mainly attributed to the close herringbone packing of BPDTT molecules and the high homogeneity between PVA and BPDTT molecules. [ABSTRACT FROM AUTHOR]

Published
2006
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