Linear carbon chains inside multi-walled carbon nanotubes

Linear carbon chains (LCCs) consisting of sp-hybridized carbon atoms are considered a fascinating 1D system and could be used in the fabrication of the next-generation molecular devices because of its ideal linear atomic nature. A large portion of long LCCs inside multi-walled carbon nanotubes (MWCNTs) were synthesized by atmospheric arc discharge in the presence of boron. Closed-end growth of MWCNTs in the arc process is suggested as a critical condition for the simultaneous growth of…

"Linear carbon chains inside multi-walled carbon nanotubes"

Growth of Linear Carbon Chains inside Thin Double-Wall Carbon Nanotubes

Fusion reactions of size-selected linear polyyne molecules, C10H2, in the ultrathin one-dimensional (1D) nanospace of double wall carbon nanotubes (DWCNTs) have been observed, leading to the formation of very long linear carbon chains. The formation and growth of long linear carbon chains is investigated by Raman spectroscopy and density-functional tight-binding-based molecular dynamics simulations. The high-resolution transmission electron microscope images of C10H2@DWCNTs show that the encapsulated linear C10H2 molecules have a length of 1.2–1.3 nm. After…

"Growth of Linear Carbon Chains inside Thin Double-Wall Carbon Nanotubes"

Electrical Transport Measured in Atomic Carbon Chains

The first electrical-transport measurements of monatomic carbon chains are reported in this study. The chains were obtained by unraveling carbon atoms from graphene ribbons while an electrical current flowed through the ribbon and, successively, through the chain. The formation of the chains was accompanied by a characteristic drop in the electrical conductivity. The conductivity of the chains was much lower than previously predicted for ideal chains. First-principles calculations using both density functional and many-body perturbation…

"Electrical Transport Measured in Atomic Carbon Chains"

Switching Behavior of Carbon Chains Bridging Graphene Nanoribbons

Recently, several experiments demonstrated the stability of chain-like carbon nanowires bridged between graphene nanoribbons, paving the way for potential applications in nanodevices. On the basis of density functional tight-binding calculations, we demonstrated switching for chains terminated with a five-membered ring under an applied strain, serving as a model for morphological changes in realistic materials. Electron transport calculations showed an increase of up to 100% in the output current, achieved at a reverse bias voltage of…

"Switching Behavior of Carbon Chains Bridging Graphene Nanoribbons"

High-Performance Nonfullerene Polymer Solar Cells

High-performance nonfullerene polymer solar cells (PSCs) are developed by integrating the nonfullerene electron-accepting material 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophne) (ITIC) with a wide-bandgap electron-donating polymer PTzBI or PTzBI-DT, which consists of an imide functionalized benzotriazole (TzBI) building block. Detailed investigations reveal that the extension of conjugation can affect the optical and electronic properties, molecular aggregation properties, charge separation in the bulk-heterojunction films, and thus the overall photovoltaic performances. Single-junction PSCs based on PTzBI:ITIC and PTzBI-DT:ITIC exhibit remarkable power conversion…

"High-Performance Nonfullerene Polymer Solar Cells"

High-Performance and Stable All-Polymer Solar Cells

High-Performance and Stable All-Polymer Solar Cells Using Donor and Acceptor Polymers with Complementary Absorption Authors: Zhaojun Li, Wei Zhang, Xiaofeng Xu, Zewdneh Genene, Dario Di Carlo Rasi, Wendimagegn Mammo, Arkady Yartsev, M. R. Andersson, René A. J. Janssen, Ergang Wang http://onlinelibrary.wiley.com/doi/10.1002/aenm.201602722/full  

"High-Performance and Stable All-Polymer Solar Cells"

Carbon Anode Materials for Advanced Sodium-Ion Batteries

The ever-increasing demand of lithium-ion batteries (LIBs) caused by the rapid development of various electronics and electric vehicles will be hindered by the limited lithium resource. Thus sodium-ion batteries (SIBs) have been considered as a promising potential alternative for LIBs owing to the abundant sodium resource and similar electrochemical performances. In recent years, significant achievements regarding anode materials which restricted the development of SIBs in the past decades have been attained. Significantly, the sodium storage…

"Carbon Anode Materials for Advanced Sodium-Ion Batteries"

Carbon Emerges as New Solar Power Material

Carbon-based photovoltaic devices might one day replace silicon solar cells Researchers are investigating how carbon can harness the sun’s light, potentially replacing more expensive and toxic materials used in conventional photovoltaic technologies. Now a team at Stanford University has developed a solar cell whose components are made solely from carbon. The scientists published their findings last month in the journal ACS Nano. «We were interested in forming basically a new type of solar cell in…

"Carbon Emerges as New Solar Power Material"

Yichen Deng, Steven W. Cranford Thermal conductivity of 1D carbyne chains

March 2017 Abstract Carbyne is a one-dimensional monoatomistic chain of carbon atoms, consisting of repeating sp-hybridized groups – the extreme minimalist molecular rod or chain. Due to their potential use in atomic-scale circuits, there has been particular interest in their novel electronic and thermal properties and are promising platforms for heat dissipation. Potential 1D thermal transport is advantageous as the heat conduction can theoretically be directed along the molecule. However, the thermal properties of carbyne,…

"Yichen Deng, Steven W. Cranford Thermal conductivity of 1D carbyne chains"