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Xu B, Wei X, Sun J, Liu J, Ma L. In-situ Synthesis of Nitrogen-doped Graphene Layer Encapsulated Palladium Nanoparticles for Highly Selective Hydrogenation of Vanillin. ACTA CHIMICA SINICA 2023. [DOI: 10.6023/a22120481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Xu Y, Chang J, Liang C, Sui X, Ma Y, Song L, Jiang W, Zhou J, Guo H, Liu X, Zhang Y. Tailoring Multi-Walled Carbon Nanotubes into Graphene Quantum Sheets. ACS APPLIED MATERIALS & INTERFACES 2020; 12:47784-47791. [PMID: 32985171 DOI: 10.1021/acsami.0c11702] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Transformation of carbon nanotubes (CNTs) into sub-10 nm pieces is highly required but remains a great challenge. Herein, we report a robust strategy capable of mechanically tailoring pristine multi-walled carbon nanotubes (MWCNTs) into graphene quantum sheets (M-GQSs) with an extremely high yield of up to 44.6 wt %. The method combines silica-assisted ball-milling and sonication-assisted solvent exfoliation and therefore enables reproducible high-yield production of M-GQSs directly from MWCNTs. Remarkable solvent diversity and extraordinary solvability (up to 7 mg/mL) are demonstrated facilitating the solution processing of the M-GQSs. The M-GQSs are essentially monolayers with intrinsic curvature, which could be determinative to their outstanding performances in both dispersions and thin films. Besides the excitation wavelength-, concentration-, and solvent-dependent photoluminescence in dispersions, the solid-state fluorescence and exceptional nonlinear saturation absorption (NSA) in thin films are demonstrated. Particularly, NSA with relative modulation depth up to 46% and saturation intensity down to 1.53 MW/cm2 are achieved in M-GQS/poly(methyl methacrylate) hybrid thin films with a loading content of merely 0.2 wt %. Our method opens up a new avenue toward conversion and utilization of CNTs.
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Affiliation(s)
- Yuanqing Xu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jinquan Chang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Cheng Liang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xinyu Sui
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
| | - Yanhong Ma
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
| | - Luting Song
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
| | - Wenyu Jiang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jin Zhou
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
| | - Hongbo Guo
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
| | - Xinfeng Liu
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
| | - Yong Zhang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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Rockson TK, Baek S, Jang H, Choi G, Oh S, Kim J, Cho H, Kim SH, Lee HS. Engineering Asymmetric Charge Injection/Extraction to Optimize Organic Transistor Performances. ACS APPLIED MATERIALS & INTERFACES 2019; 11:10108-10117. [PMID: 30784260 DOI: 10.1021/acsami.9b01658] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The introduction of an appropriate functionality on the electrode/active layer interface has been found to be an efficient methodology to enhance the electrical performances of organic field-effect transistors (OFETs). Herein, we efficiently optimized the charge injection/extraction characteristics of source/drain (S/D) electrodes by applying an asymmetric functionalization at each individual electrode/organic semiconductor (OSC) interface. To further clarify the functionalizing effects of the electrode/OSC interface, we systematically designed five different OFETs: one with pristine S/D electrodes (denoted as pristine S/D) and the remaining ones made by symmetrically or asymmetrically functionalizing the S/D electrodes with up to two different self-assembled monolayers (SAMs) based on thiolated molecules, the strongly electron-donating thiophenol (TP) and electron-withdrawing 2,3,4,5-pentafluorobenzenethiol (PFBT). Both the S and D electrodes were functionalized with TP (denoted as TP-S/D) in one of the two symmetric cases and with PFBT in the other (PFBT-S/D). In each of the two asymmetric cases, one of the S/D electrodes was functionalized with TP and the other with PFBT (to produce PFBT-S/TP-D and TP-S/PFBT-D OFETs). The vapor-deposited p-type dinaphtho[2,3- b:2',3'- f]thieno[3,2- b]thiophene was used as the OSC active layer. The PFBT-S/TP-D case exhibited a field-effect mobility (μFET) of 0.86 ± 0.23 cm2 V-1 s-1, about three times better than that of the pristine S/D case (0.31 ± 0.12 cm2 V-1 s-1). On the other hand, the μFET of the TP-S/PFBT-D case (0.18 ± 0.10 cm2 V-1 s-1) was significantly lower than that of the pristine case and even lower than those of the TP-S/D (0.23 ± 0.07 cm2 V-1 s-1) and PFBT-S/D (0.58 ± 0.19 cm2 V-1 s-1) cases. These results were clearly correlated with the additional hole density, surface potential, and effective work function. In addition, the contact resistance ( RC) for the asymmetric PFBT-S/TP-D case was 10-fold less than that for the TP-S/PFBT-D case and more than five times lower than that for the pristine case. The results contribute a meaningful step forward in improving the electrical performances of various organic electronics such as OFETs, inverters, solar cells, and sensors.
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Affiliation(s)
- Tonnah Kwesi Rockson
- Department of Chemical & Biological Engineering , Hanbat National University , Daejeon 34158 , Republic of Korea
| | - Seolhee Baek
- Department of Chemical & Biological Engineering , Hanbat National University , Daejeon 34158 , Republic of Korea
| | - Hayeong Jang
- Department of Chemical & Biological Engineering , Hanbat National University , Daejeon 34158 , Republic of Korea
| | - Giheon Choi
- Department of Chemical & Biological Engineering , Hanbat National University , Daejeon 34158 , Republic of Korea
| | - Seungtaek Oh
- Department of Chemical & Biological Engineering , Hanbat National University , Daejeon 34158 , Republic of Korea
| | - Jaehan Kim
- Department of Chemical & Biological Engineering , Hanbat National University , Daejeon 34158 , Republic of Korea
| | - Hyewon Cho
- Department of Chemical & Biological Engineering , Hanbat National University , Daejeon 34158 , Republic of Korea
| | - Se Hyun Kim
- School of Chemical Engineering , Yeungnam University , Gyeongsan 38541 , Republic of Korea
| | - Hwa Sung Lee
- Department of Chemical & Biological Engineering , Hanbat National University , Daejeon 34158 , Republic of Korea
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Liu L, Ding L, Zhong D, Han J, Wang S, Meng Q, Qiu C, Zhang X, Peng LM, Zhang Z. Carbon Nanotube Complementary Gigahertz Integrated Circuits and Their Applications on Wireless Sensor Interface Systems. ACS NANO 2019; 13:2526-2535. [PMID: 30694653 DOI: 10.1021/acsnano.8b09488] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Along with ultralow-energy delay products and symmetric complementary polarities, carbon nanotube field-effect transistors (CNT FETs) are expected to be promising building blocks for energy-efficient computing technology. However, the work frequencies of the existing CNT-based complementary metal-oxide-semiconductor (CMOS) integrated circuits (ICs) are far below the requirement (850 MHz) in state-of-art wireless communication applications. In this work, we fabricated deep submicron CMOS FETs with considerably improved performance of n-type CNT FETs and hence significantly promoted the work frequency of CNT CMOS ICs to 1.98 GHz. Based on these high-speed and sensitive voltage-controlled oscillators, we then presented a wireless sensor interface circuit with working frequency up to 1.5 GHz spectrum. As a preliminary demonstration, an energy-efficient wireless temperature sensing interface system was realized combining a 150 mAh flexible Li-ion battery and a flexible antenna (center frequency of 915 MHz). In general, the CMOS-logic high-speed CNT ICs showed outstanding energy efficiency and thus may potentially advance the application of CNT-based electronics.
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Affiliation(s)
- Lijun Liu
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics , Peking University , Beijing 100871 , China
| | - Li Ding
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics , Peking University , Beijing 100871 , China
| | - Donglai Zhong
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics , Peking University , Beijing 100871 , China
| | - Jie Han
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics , Peking University , Beijing 100871 , China
| | - Shuo Wang
- Key Laboratory of Green Printing , Institute of Chemistry, Chinese Academy of Sciences (ICCAS) , Beijing 100190 , China
| | - Qinghai Meng
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , China
| | - Chenguang Qiu
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics , Peking University , Beijing 100871 , China
| | - Xingye Zhang
- Key Laboratory of Green Printing , Institute of Chemistry, Chinese Academy of Sciences (ICCAS) , Beijing 100190 , China
| | - Lian-Mao Peng
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics , Peking University , Beijing 100871 , China
| | - Zhiyong Zhang
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics , Peking University , Beijing 100871 , China
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