Article
Materials Science, Multidisciplinary
Xiaohui Liu, Yangyang Hu, Danting Li, Guiling Zhang, Wei Quan Tian
Summary: Based on the successful achievement of single-molecule graphene-C-60 transistors, a series of double-layered GNR-C-60 devices were designed and investigated for their transport properties. The overall conductivity of these devices followed the sequence: H/GNR-C-60 > S/GNR-C-60 > O/GNR-C-60. All devices showed multiple negative differential resistance (NDR) within the considered bias range. The NDR behavior was influenced by various factors such as passivated edges, electrode linkages, interactions between graphene nanoribbons, and applied voltage.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Raphael M. Tromer, Levi C. Felix, Luiz A. Ribeiro, Douglas S. Galvao
Summary: The study investigated the optoelectronic properties of free-standing monolayer amorphous carbon (MAC) and its derived nanostructures, revealing similar electronic behaviors and suitability as UV filters.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
S. Azar Oliaei Motlagh, Vadym Apalkov
Summary: The interaction between graphene quantum dots (GQDs) and ultrashort strong optical pulses was studied theoretically. The absorbance of GQDs has a highly nonlinear dependence on the field amplitude, showing different relationships at small and large-field amplitudes. The absorbance also has a maximum value depending on the size of the dot as the field amplitude changes.
Article
Chemistry, Physical
Takumi Inaba, Takahiro Morimoto, Satoshi Yamazaki, Toshiya Okazaki
Summary: Multi-walled carbon nanotube networks exhibit a linear decrease in resistivity with increasing temperature, attributed to a defect scattering model involving Friedel oscillations. The introduction of defects leads to an increase in the slope of the resistivity-temperature plots. The linearity may be due to the hexagonal symmetry of the materials.
Article
Physics, Multidisciplinary
Davoud Adinehloo, Weilu Gao, Ali Mojibpour, Junichiro Kono, Vasili Perebeinos
Summary: The electrical conductivity of macroscopic assemblies of nanomaterials is determined by the interplay between electronic transport and phonons. Phonons can reduce conductivity through electron scattering, but also enhance it by aiding electron propagation. In this study, we found that phonon-assisted coherent electron transport is the dominant mechanism for high-temperature transport in carbon nanotubes. This discovery proves the potential of single-chirality carbon nanotube films as unique solid-state ensembles for the development of room-temperature coherent electronic devices.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Weilu Gao, Davoud Adinehloo, Xinwei Li, Ali Mojibpour, Yohei Yomogida, Atsushi Hirano, Takeshi Tanaka, Hiromichi Kataura, Ming Zheng, Vasili Perebeinos, Junichiro Kono
Summary: This study investigates the chirality-dependent electronic transport properties of single-chirality SWCNT films, revealing pronounced electronic localization phenomena and providing insights for designing and deploying macroscopic SWCNT solid-state devices. The research highlights the importance of understanding chirality-dependent behaviors in SWCNTs for various applications.
Article
Chemistry, Multidisciplinary
Kim Eklund, Antti J. Karttunen
Summary: Nitrogen-doped carbon nanotubes (N-CNTs) hold promise in various applications, with this study using hybrid density functional theory and semiclassical Boltzmann transport theory to investigate the impact of different substitutional nitrogen doping configurations on the electrical conductivity of N-CNTs. The results show significant variations in conductivity and relative energies of different dopant configurations, providing insights for optimizing the electrical transport properties of N-CNTs.
Article
Engineering, Environmental
Tengyu Zhang, Jingxin Zhang, Pengshuai Zhang, Jiabin Wang, Yiliang He
Summary: This study demonstrates that under limited substrate conditions, Fe-driven electronic bifurcation (EB) in anaerobic digestion (AD) leads to a 40% increase in specific methane production and contributes to 25% ATP accumulation. Iron enhances electron transport in EB by accelerating the activity of flavin, Fe-S clusters, and quinone groups. The potential of EB to accumulate energy and enhance productivity in AD systems has been investigated, and a strategy of strengthening anaerobic digestion capacity of iron-driven multi-EB in a restricted environment is proposed.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Mingge Yang, Ziyue Wang, Jiangxiao Li, Bin Hong, Yinchang Du, Wensen Wei, Ruilong Wang, Fengguang Liu, Lin Zu
Summary: We report the structure, magnetic and electrical/thermal transport properties of the antiferromagnet MnSn2. The existence of two antiferromagnetic states below T-N2 (around 320 K) is confirmed by magnetism and electrical transport measurements. The results suggest that the spin arrangement plays a vital role in the magnetic, electrical, and thermal transport properties in MnSn2.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Wei Cao, Ziyu Wang, Ling Miao, Jing Shi, Rui Xiong
Summary: The high-temperature phase of Cu2Se, beta-Cu2Se, has attracted attention for its excellent thermoelectric efficiency. Studying the effect of strain and the possibility of n-type beta-Cu2Se is essential, with compressive strain promoting the power factor and tensile strain reducing lattice thermal conductivity. Predicted zT values for n-type and p-type beta-Cu2Se can reach 1.65 and 1.71 at 800 K respectively, and a feasible strategy to manipulate the lattice structure and carrier type is proposed through doping halogen elements.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Biochemistry & Molecular Biology
Vahideh Khademhosseini, Daryoosh Dideban, Mohammad Taghi Ahmadi, Hadi Heidari
Summary: The single electron transistor (SET) is a nanoscale switching device that operates based on the tunneling of single electrons. In this study, multiple quantum dot islands such as graphene nanoscroll-carbon nanotubes (GNS-CNT) and graphene nanoscroll-fullerene (GNS-C-60) are used in SET devices. The impacts of important parameters such as temperature and applied gate voltage on the current of these SETs are investigated, along with the effects of various structural factors on the current. The results show that the GNS-CNT SET has a lower Coulomb blockade range and a higher current than the GNS-C-60 SET.
Article
Chemistry, Multidisciplinary
Mehmet Emin Kilic, Kwang-Ryeol Lee
Summary: A new two-dimensional boron nitride structure, th-BN, with perfectly ordered arrangements of tetragonal and hexagonal rings is predicted to be energetically, dynamically, thermally, and mechanically stable. th-BN exhibits exceptional mechanical properties such as high in-plane stiffness and tunable Poisson's ratio. It also shows high optical absorption in the ultraviolet region and can be stacked into different configurations with exotic electronic properties, making it suitable for high-performance optoelectronic device applications.
Article
Agricultural Engineering
Lingzhan Miao, Wenyun Chai, Dan Luo, Tanveer M. Adyel, Jun Wu, Ming Kong, Wanzhong Wang, Jun Hou
Summary: A hybrid scaffold of polyvinyl alcohol/sodium alginate was used to prepare solid carbon sources (SCSs) for treating low carbon/nitrogen wastewater. The performance of denitrification was higher with the blended SCSs, and the microbial community structure was significantly affected.
BIORESOURCE TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yue Wang, Jianxin Liang, Zhi Yang, Li-Chun Xu, Lin Xue, Ruiping Liu, Xuguang Liu
Summary: In this study, the structures, stabilities, electronic properties, and transport properties of line defects in stable x3-borophene were theoretically investigated using density functional theory and non-equilibrium Green's function method. The results showed that there are special line defects along the zigzag direction that can enhance the stability of x3-borophene and the six-coordination B atoms play a key role in this enhanced stability. The line defects also have significant impacts on the electronic properties and exhibit complicated transport behaviors under different frequency ranges. The equivalent circuits of x3-borophene and its line defects were suggested for the low-frequency range, which will be useful for designing borophene-based functional nanodevices.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Natalya S. Fedorova, Andrea Cepellotti, Boris Kozinsky
Summary: This study uncovers a new phenomenon where the electrical conductivity decreases with carrier concentration, the Seebeck coefficient reverses sign even at high doping, and the power factor exhibits an unusual second peak in materials with multiple bands crossing near the Fermi level. The origin and magnitude of this effect are explained, and general design rules for enhancing performance in thermoelectric materials are identified.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Physics, Multidisciplinary
Tinggui Chen, Baizhan Xia, Dejie Yu, Chuanxing Bi
Summary: This study proposes a gradient phononic crystal structure for enhanced acoustic sensing. By breaking the symmetry of the PC structure, topologically protected edge states are introduced, resulting in topological acoustic rainbow trapping. The robustness and enhancement properties are verified numerically and experimentally.
