نتایج جستجو برای: Nanographene

تعداد نتایج: 237  

Journal: :Journal of the American Chemical Society 2015
Ahmad N Abbas Bilu Liu Akimitsu Narita Lukas F Dössel Bo Yang Wen Zhang Jianshi Tang Kang L Wang Hans Joachim Räder Xinliang Feng Klaus Müllen Chongwu Zhou

Recently, chemical synthesis of a range of large nanographene molecules with various shapes and sizes opened a new path to utilize them in various applications and devices. However, due to their extended aromatic cores and high molecular weight, film formation of large nanographene molecules, bearing more than 90 sp(2) carbon atoms in aromatic cores, is very challenging, which has prevented the...

2012
Toshiaki Enoki Katsunori Wakabayashi Ken-ichi Sasaki Takeshi Nakanishi

In graphene edges or nanographene, the presence of edges strongly affects the electronic structure depending on their edge shape (zigzag and armchair edges) as observed with the electron wave interference and the creation of non-bonding π -electron state (edge state). We investigate the edge-inherent electronic features and the magnetic properties of edge-sate spins in nanographene/graphene edg...

Journal: :Journal of physics. Condensed matter : an Institute of Physics journal 2010
G U Sumanasekera G Chen K Takai J Joly N Kobayashi T Enoki P C Eklund

The adsorption/desorption processes of oxygen are investigated in nanoporous carbon (activated carbon fiber (ACF)) consisting of a disordered network of nanographene sheets. The heat-induced desorption at 200 °C shows the decomposition of oxygen-including functional groups weakly bonded to nanographene edges. The removal of these oxygen-including negatively charged functional groups brings abou...

2017
Shuo Li Hengfeng Yuan Jianfeng Pan Wenshuai Fan Liang Zhu Zuoqin Yan Changan Guo

PURPOSE Previous studies have proved that vascular endothelial growth factor (VEGF) has a dual role in the promotion of new bone formation and blood vessel repair during fracture healing. However, how to introduce VEGF to a fracture site safely and effectively is still a challenge. This study aimed to prepare a VEGF-loaded nanographene coated internal fixation screw and to evaluate its effects ...

Journal: :Chemical communications 2012
Jenny Malig Adam W I Stephenson Pawel Wagner Gordon G Wallace David L Officer Dirk M Guldi

Exfoliation of graphite was achieved using a free-base porphyrin 1 resulting in an efficient fabrication of single-layer nanographene (NG)- hybrid platelets that can be further functionalized with other nanomaterials. The novel nanographene-porphyrin hybrids reveal efficient charge transfer in the excited state.

2009
Kikuo Harigaya

Nano-carbon materials are investigated intensively. In this paper, the edge-state in nanographene materials with zigzag edges is studied theoretically. In particular, while the inter-layer interactions are considered, we prove that edge states exist at the energy of the Dirac point in the doubly stacked nanographene, and in the case of the infinitely-wide lower layer case. This property applies...

2016
Sabine Seifert Kazutaka Shoyama David Schmidt Frank Würthner

Herein, we report the one-pot synthesis of an electron-poor nanographene containing dicarboximide groups at the corners. We efficiently combined palladium-catalyzed Suzuki-Miyaura cross-coupling and dehydrohalogenation to synthesize an extended two-dimensional π-scaffold of defined size in a single chemical operation starting from N-(2,6-diisopropylphenyl)-4,5-dibromo-1,8-naphthalimide and a te...

Journal: :Journal of physics. Condensed matter : an Institute of Physics journal 2017
J A Geraets J P C Baldwin R Twarock Y Hancock

A methodology for predictive kinetic self-assembly modeling of bottom-up chemical synthesis of nanographene is proposed. The method maintains physical transparency in using a novel array format to efficiently store molecule information and by using array operations to determine reaction possibilities. Within a minimal model approach, the parameter space for the bond activation energies (i.e. mo...

2007
Junichiro Shiomi Shigeo Maruyama

Investigations of diffusive-ballistic heat conduction of finite-length single-walled carbon nanotubes and nanographene ribbons at room temperature have been carried out by using nonequilibrium molecular dynamics simulations. The length dependences of thermal conductivity reveal the variation of the balance between ballistic and diffusive heat conduction. For both systems, the profile indicates ...

2016
Christos Mathioudakis Pantelis C Kelires

Monte Carlo simulations and tight-binding calculations shed light on the properties of three-dimensional nanographene, a material composed of interlinked, covalently-bonded nanoplatelet graphene units. By constructing realistic model networks of nanographene, we study its structure, mechanical stability, and optoelectronic properties. We find that the material is nanoporous with high specific s...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید