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Solar photothermal conversion is one of the most straightforward methods to utilize solar energy. In this manuscript, a novel double-layer structure constructed of graphene enhanced thermoplastic polyurethanes (G-TPU) and neat thermoplastic…

Materials Science · Physics 2024-10-10 Zihao Kang , Min Xi , Nian Li , Shudong Zhang , Zhenyang Wang

The ability of atomic hydrogen to chemisorb on graphene makes the latter a promising material for hydrogen storage. Based on scanning tunneling microscopy techniques, we report on site-selective adsorption of atomic hydrogen on convexly…

Polyaniline and graphene nanoplatelets (PANI-GNP) nanocomposites are synthesized by in situ oxidative polymerization of polyaniline using an oxidizing agent, ammonium peroxy disulphate (APS). The mass of GNP in the nanocomposites varied by…

Preliminary evidence for the occurrence of high-Tc superconductivity in alkali-doped organic materials, such as potassium-doped p-terphenyl (KPT), were recently obtained by magnetic susceptibility measurements and by the opening of a large…

Hydrogen is a promising alternative energy carrier that can potentially facilitate the transition from fossil fuels to sources of clean energy because of its prominent advantages such as high energy density (142 MJ per kg), great variety of…

Mesoscale and Nanoscale Physics · Physics 2013-04-19 S. S. Makridis , E. Gkanas , G. Panagakos , E. S. Kikkinides , A. K. Stubos , P. Wagener , S. Barcikowski

Ab initio calculations within the density-functional theory formalism are performed to investigate the ground state, electric charge doping, and electronic properties of titanium and titanium dioxide monolayers adsorbed on a graphene…

Materials Science · Physics 2013-01-17 Jozef Sivek , Ortwin Leenaerts , Bart Partoens , Francois Peeters

Reduced graphene oxide (rGO) is a bulk-processable quasi-amorphous 2D material with broad spectral coverage and fast electronic response. rGO sheets are suspended in a polymer matrix and sequentially photoreduced while measuring the…

Materials Science · Physics 2023-06-19 Alden N. Bradley , Spencer G. Thorp , Gina Mayonado , Edward Elliott , Matt W. Graham

By employing the state-of-the-art density functional theory, we report the hydrogen storage capability of yttrium decorated C$_{24}$ fullerene. Single Y atom attached on C$_{24}$ fullerene can reversibly adsorb a maximum number of 6 H$_2$…

Materials Science · Physics 2022-02-11 Vikram Mahamiya , Alok Shukla , Brahmananda Chakraborty

The electronic and magnetic properties of single 3d transition-metal(TM) atom (V, Cr, Mn, Fe, Co, and Ni) adsorbed graphdiyne (GDY) and graphyne (GY) are systematically studied using first-principles calculations within the density…

Materials Science · Physics 2013-01-11 Junjie He , ShuangYing Ma , Pan Zhou , C. X. Zhang , Chaoyu He , L. Z. Sun

Fast-growing electronics industry and future energy storage needs have encouraged the design of rechargeable batteries with higher storage capacities, and longer life times. In this regard, two-dimensional (2D) materials, specifically boron…

Applied Physics · Physics 2018-03-21 Meysam Makaremi , Bohayra Mortazavi , Chandra Veer Singh

At present, Pt nanoparticle catalysts in fuel cells suffer from aggregation and loss of chemical activity. In this work, graphdiyne, which has natural porous structure, was proposed as substrate with high adsorption ability to stabilize Pt…

Mesoscale and Nanoscale Physics · Physics 2015-03-03 Zheng-Zhe Lin

We calculate the finite temperature compressibility for two-dimensional semiconductor systems, monolayer graphene, and bilayer graphene within the Hartree-Fock approximation. We find that the calculated temperature dependent compressibility…

Mesoscale and Nanoscale Physics · Physics 2011-12-02 Qiuzi Li , E. H. Hwang , S. Das Sarma

Two-dimensional materials offering ultrafast photoresponse suffer from low intrinsic absorbance, especially in the mid-infrared wavelength range. Challenges in 2d material doping further complicate the creation of light-sensitive $p-n$…

We report the chemical reaction of single-layer graphene with hydrogen atoms, generated in situ by electron-induced dissociation of hydrogen silsesquioxane (HSQ). Hydrogenation, forming sp3 C-H functionality on the basal plane of graphene,…

Recently, superconductivity in potassium (K) doped p-terphenyl (C18H14) has been suggested by the possible observation of the Meissner effect and subsequent photoemission spectroscopy measurements, but the detailed lattice structure and…

Superconductivity · Physics 2019-01-16 M. Q. Ren , W. Chen , Q. Liu , C. Chen , Y. J. Qiao , Y. J. Chen , G. Zhou , T. Zhang , Y. J. Yan , D. L. Feng

Tuning band gaps in two-dimensional (2D) materials is of great interest in the fundamental and practical aspects of contemporary material sciences. Recently, black phosphorus (BP) consisting of stacked layers of phosphorene was…

Materials Science · Physics 2017-09-13 Sun-Woo Kim , Hyun Jung , Hyun-Jung Kim , Jin-Ho Choi , Su-Huai Wei , Jun-Hyung Cho

We present flexible photodetectors (PDs) for visible wavelengths fabricated by stacking centimetre-scale chemical vapour deposited (CVD) single layer graphene (SLG) and single layer CVD MoS2, both wet transferred onto a flexible…

Materials Science · Physics 2017-08-09 D. De Fazio , I. Goykhman , M. Bruna , A. Eiden , S. Milana , D. Yoon , U. Sassi , M. Barbone , D. Dumcenco , K. Marinov , A. Kis , A. C. Ferrari

Today, 2D semiconductor materials have been extended into the nitrogen group: phosphorene, arsenene, antimonene and even nitrogene. Motivated by them, based upon first-principles density functional calculations, we propose a new…

Mesoscale and Nanoscale Physics · Physics 2016-03-11 Hang Xiao , Feng Hao , Xiangbiao Liao , Xiaoyang Shi , Yayun Zhang , Xi Chen

In this letter, we investigate numerically (by non-equilibrium molecular dynamics) and analytically the thermal conductivity of nanoscale graphene disks (NGDs), and discussed the possibility to realize FGM with only one material, NGDs. We…

Materials Science · Physics 2015-12-07 Nuo Yang , Shiqian Hu , Dengke Ma , Tingyu Lu , Baowen Li

1.8 micrometer-thick magnesium hydride films were synthesized in a single-step process by reactive plasma-assisted sputtering. The MgH2 thin films, which were deposited on two types of flexible surfaces (namely graphite and polyimide foils)…

Applied Physics · Physics 2023-11-03 Huy Le-Quoc , Marie Coste , Ana Lacoste , L. Laversenne