Article
Chemistry, Multidisciplinary
Yahui Li, Miaomiao Zheng, Jian Yao, Wenbin Gong, Yijun Li, Jianshi Tang, Shun Feng, Ruyue Han, Qicheng Sui, Song Qiu, Lixing Kang, Hehua Jin, Dongming Sun, Qingwen Li
Summary: The study demonstrates that specific monochiral SWCNTs can be purified through wrapping by conjugated polymers, and novel methods developed successfully achieve high monochiral purity of SWCNTs of specific diameters. These SWCNTs can be applied in micro- and nanoscale field-effect transistors, exhibiting excellent electrical performance and high semiconducting purity.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Analytical
Yixi Deng, Lei Liu, Jingyan Li, Li Gao
Summary: This paper focuses on the application of carbon nanotube field-effect transistor (CNT-FET) biochemical sensors in detecting biomarkers. It introduces the preparation, properties, and functional modification of CNTs, as well as the configuration and sensing mechanism of CNT-FETs. The latest progress in detecting nucleic acids, proteins, cells, gases, and ions based on CNT-FET sensors is summarized.
Article
Chemistry, Multidisciplinary
Francesca Scuratti, Jorge Mario Salazar-Rios, Alessandro Luzio, Sebastian Kowalski, Sybille Allard, Stefan Jung, Ullrich Scherf, Maria Antonietta Loi, Mario Caironi
Summary: When a higher proportion of nanotubes with smaller bandgaps are efficiently connected, a sparse network allows for efficient charge percolation for band-like transport, achieving a charge mobility as high as 20.2 cm(2) V-1 s(-1). However, if charges are forced to populate higher bandgap nanotubes and/or the wrapping polymer by a less efficient morphology, thermally activated transport occurs and mobility decreases.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
M. Najarsadeghi, A. Ahmadi Fouladi, A. Zati Rostami, A. Pahlavan
Summary: Using the non-equilibrium Green's function method and tight-binding Hamiltonian model, the spin-dependent transport and tunnel magnetoresistance (TMR) of AAA- and ABC-stacked trilayer zigzag graphene nanoribbon (TLG) connected to two ferromagnetic (FM) single-layer zigzag graphene nanoribbons (FM/TLG/FM system) were theoretically investigated. Results showed that the TMR for both AAA- and ABC-stacked cases could be increased about 100% due to the band-selective rule, and the magnitude of this 100% TMR region enhanced with the increase of the magnetization strength in FM graphene nanoribbon electrodes. The TLG dimension also had a prominent effect on the TMR ratio of the system.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Jian Zhang, Gabriela Borin Barin, Roman Furrer, Cheng-Zhuo Du, Xiao-Ye Wang, Klaus Muellen, Pascal Ruffieux, Roman Fasel, Michel Calame, Mickael L. Perrin
Summary: Bottom-up synthesized graphene nanoribbons (GNRs) are of interest due to their atomically controlled structure and customizable physical properties. However, understanding the relationship between cryogenic charge transport and the number of GNRs in a device is challenging due to lack of precise control over GNR length and location.
Review
Chemistry, Multidisciplinary
Alessandro Paghi, Stefano Mariani, Giuseppe Barillaro
Summary: The synthesis and understanding of 1D and 2D materials have advanced rapidly, leading to their incorporation into sensor architectures, specifically field effect transistors (FETs), for gas and vapor monitoring. However, challenges remain in fabricating 1D and 2D FET gas sensors for real-field applications, primarily in terms of properties, synthesis, and integration of these materials into the transistor structure. This review paper comprehensively analyzes the materials used in FET gas sensors, including 1D materials (metal oxide semiconductors, silicon nanowires, carbon nanotubes) and 2D materials (graphene, transition metal dichalcogenides, phosphorene), and explores how material synthesis, surface functionalization, and transistor fabrication influence the electrical and sensing properties of these devices. Additionally, the strengths and weaknesses of 1D and 2D FETs for gas and vapor sensing applications are discussed, along with future directions.
Article
Chemistry, Multidisciplinary
Yanxia Lin, Shibo Liang, Lin Xu, Lijun Liu, Qianlan Hu, Chenwei Fan, Yifan Liu, Jie Han, Zhiyong Zhang, Lian-Mao Peng
Summary: In this study, enhancement-mode (E-mode) FETs based on aligned carbon nanotube films were fabricated with high carrier mobility and improved subthreshold swing. The fabricated FETs showed performance exceeding commercial Si-based transistors, and ring oscillators exhibited record propagation gate delay among CNT- and other nanomaterial-based ICs.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Mahima Chaudhary, Chenghao Xin, Zhelu Hu, Dongjiu Zhang, Guillaume Radtke, Xiangzhen Xu, Laurent Billot, Charlotte Tripon-Canseliet, Zhuoying Chen
Summary: The development of FET-based non-volatile optoelectronic memories is crucial for improving computer systems. This study demonstrates the use of solution-processed colloidal nitrogen-doped carbon quantum dots to achieve functional optoelectronic memories programmable by UV illumination. The memory can be erased by a positive gate bias.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Physics, Multidisciplinary
Young Woo Choi, Marvin L. Cohen
Summary: We investigated the electromigration forces for weakly bonded adsorbates on graphene using density-functional based calculations. The results showed that the nature of electromigration forces depends critically on the energy level alignment between the adsorbate state and the Fermi level of the graphene. For resonant adsorbates, the electromigration force is dominated by the electron wind force, while for nonresonant adsorbates, it is essentially the direct force dependent on the adsorbate charge. Moreover, we demonstrated that the magnitude of electromigration forces can be continuously adjusted through electrostatic gating for resonant adsorbates.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Mitsuo Asai, Satoko Honda, Nobuyuki Isshiki, Masahumi Takesue, Atsushi Hiraishi, Mayu Yamada, Kuniharu Takei
Summary: Flexible sensors can gather information from nonplanar surfaces, such as monitoring pH levels in industrial wastewater. Carbon nanotube field-effect transistors (CNT-FETs) are attractive transducers for flexible sensors due to their good electrical properties and mechanical flexibility. A simple method to sort semiconducting single-walled carbon nanotubes (s-SWNTs) in an aqueous system using dispersion and centrifugation is developed, leading to high-performance CNT-FETs with reduced hysteresis and improved bias stability. Real-time pH monitoring using ion-sensitive, field-effect transistors (ISFETs) based on CNT-FET is demonstrated.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Physical
Qianyu Ji, Bowen Wang, Yajuan Zheng, Xueping Yan, Fanguang Zeng, Bingheng Lu
Summary: The study introduces bulk graphene/carbon nanotubes hybrid materials for field emission applications, showcasing excellent stability and high efficiency. These bulk emitters are suitable for high-power cold cathode applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Sanchuan Zhao, Yingtao Zhao, Chenning Li, Wei Wang, Hai-Yang Liu, Lei Cui, Xiang Li, Zhenhua Yang, Anni Zhang, Yurou Wang, Yuxuan Lin, Tailang Hao, Jun Yin, Joohoon Kang, Jian Zhu
Summary: Self-delaminated aramid nanodielectrics (ANDs) have been developed as ideal substrates for skin-like electronics. ANDs possess mechanical strength, chemical and thermal stability, transparency, and breathability, and can be easily exfoliated from processing substrates after complicated nanofabrication. Compliant epidermal electrodes and ultraconformal carbon nanotube transistors based on ANDs are further demonstrated with superior performance.
ADVANCED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Chenkang Rui, Cheng Shao, Jiaxu Liu, Aqing Chen, Kaigui Zhu, Qingyi Shao
Summary: In this study, we investigated the transport properties of a 2.55 nm graphene nanoribbon field-effect transistor using first principle methods. The gate voltage effectively controlled the drain current, which increased linearly with positive bias voltage and exhibited negative differential resistance under negative bias voltage. The device shows potential for applications in memory devices, oscillators, and fast switching devices.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Physics, Applied
S. Ihnatsenka
Summary: Quantum-mechanical calculations of electron transport in ideal graphene nanoribbons show that the transport gap predicted by noninteracting theories vanishes when the long-range Coulomb interaction between electrons is considered. However, the gap reappears if a ribbon is connected to wider leads, typically in experimental setups using lithographically patterned graphene ribbons. The gap is determined by scattering at the lead-to-ribbon interface, which can be captured by noninteracting theory.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Dongha Shin, Hwa Rang Kim, Byung Hee Hong
Summary: The article presents a novel strategy for chemically functionalizing graphene for use in FETs without affecting its electrical performance, by controlling the Fermi level through the consecutive treatment of gold nanoparticles and thiol-SAM molecules. This approach enables positive and negative doping effects to be induced, paving the way for developing high-performance sensors that fully utilize the pristine properties of graphene.
NANOSCALE ADVANCES
(2021)
