Three-dimensional acetylenic modified graphene for high-performance optoelectronics and topological materials

نویسندگان

چکیده

Abstract Seeking carbon phases with versatile properties is one of the fundamental goals in physics, chemistry, and materials science. Here, based on first-principles calculations, a family three-dimensional (3D) graphene networks abundant fabulous electronic properties, including rarely reported dipole-allowed truly direct band gap semiconductors suitable gaps (1.07–1.87 eV) as optoelectronic/photovoltaic topological nodal-ring semimetals, are proposed through stitching different layers acetylenic linkages. Remarkably, optical absorption coefficients some those semiconducting allotropes express possibly highest performance among all known to date. On other hand, states semimetals protected by time-reversal spatial symmetry present nodal rings helical loops patterns. Those newly revealed possess low formation energies excellent thermodynamic stabilities; thus, they not only host great potential application optoelectronics, photovoltaics, quantum etc., but also can be utilized catalysis, molecule sieves or Li-ion anode so on. Moreover, approach used here design novel may give more enlightenments create various applications.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Three-dimensional porous graphene materials for environmental applications

Copyright © Korean Carbon Society http://carbonlett.org Abstract Porous materials play a vital role in science and technology. The ability to control their pore structures at the atomic, molecular, and nanometer scales enable interactions with atoms, ions and molecules to occur throughout the bulk of the material, for practical applications. Three-dimensional (3D) porous carbon-based materials ...

متن کامل

Graphene photonics and optoelectronics

611 Electrons propagating through the bidimensional structure of graphene have a linear relation between energy and momentum, and thus behave as massless Dirac fermions1–3. Consequently, graphene exhibits electronic properties for a two-dimensional (2D) gas of charged particles described by the relativistic Dirac equation, rather than the non-relativistic Schrödinger equation with an eff ective...

متن کامل

RGO and Three-Dimensional Graphene Networks Co-modified TIMs with High Performances

With the development of microelectronic devices, the insufficient heat dissipation ability becomes one of the major bottlenecks for further miniaturization. Although graphene-assisted epoxy resin (ER) display promising potential to enhance the thermal performances, some limitations of the reduced graphene oxide (RGO) nanosheets and three-dimensional graphene networks (3DGNs) hinder the further ...

متن کامل

Chemically doped three-dimensional porous graphene monoliths for high-performance flexible field emitters.

Despite the recent progress in the fabrication of field emitters based on graphene nanosheets, their morphological and electrical properties, which affect their degree of field enhancement as well as the electron tunnelling barrier height, should be controlled to allow for better field-emission properties. Here we report a method that allows the synthesis of graphene-based emitters with a high ...

متن کامل

Three-dimensional graphene-carbon nanotube hybrid for high-performance enzymatic biofuel cells.

Enzymatic biofuel cells (EBFCs) are promising renewable and implantable power sources. However, their power output is often limited by inefficient electron transfer between the enzyme molecules and the electrodes, hindered mass transport, low conductivity, and small active surface area of the electrodes. To tackle these issues, we herein demonstrated a novel EBFC equipped with enzyme-functional...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: npj computational materials

سال: 2021

ISSN: ['2057-3960']

DOI: https://doi.org/10.1038/s41524-021-00579-5