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Surface alloying is a straightforward route to control and modify the structure and electronic properties of surfaces. Here, We present a systematical study on the structural and electronic properties of three novel rare earth-based…

Materials Science · Physics 2020-05-07 Yande Que , Yuan Zhuang , Ziyuan Liu , Chaoqiang Xu , Bin Liu , Kedong Wang , Shixuan Du , Xudong Xiao

Self-assembling peptides (SAPs) have the ability to spontaneously assemble into ordered nanostructures enabling the manufacture of "designer" nanomaterials. The reversible molecular association of SAPs has been shown to offer great promise…

Materials Science · Physics 2016-01-14 Robabeh Gharaei , Giuseppe Tronci , Robert P. Davies , Parikshit Goswami , Stephen J. Russell

The structure of an Al(111)3x3-Si surface was examined by combining data from positron diffraction and core-level photoemission spectroscopy. Analysis of the diffraction rocking curves indicated that the overlayer had a flat honeycomb…

The structure and dynamics of atomic oxygen adsorbed on Ag(410) and Ag(210) surfaces have been investigated using density functional theory. Our results show that the adsorption configuration in which O adatoms decorate the upper side of…

Materials Science · Physics 2009-11-10 N. Bonini , A. Kokalj , A. Dal Corso , S. de Gironcoli , S. Baroni

We present a model of decentralized growth for Artificial Neural Networks (ANNs) inspired by the development and the physiology of real nervous systems. In this model, each individual artificial neuron is an autonomous unit whose behavior…

adap-org · Physics 2007-05-23 Jens C. Astor , Christoph Adami

Designing a neural network architecture for molecular representation is crucial for AI-driven drug discovery and molecule design. In this work, we propose a new framework for molecular representation learning. Our contribution is threefold:…

Machine Learning · Computer Science 2022-10-18 Jiye Kim , Seungbeom Lee , Dongwoo Kim , Sungsoo Ahn , Jaesik Park

We report many different nano-structures which are formed when model nano-particles of different sizes (diameter {\sigma} n ) are allowed to aggregate in a background matrix of semi-flexible self assembled polymeric worm like micellar…

Soft Condensed Matter · Physics 2015-06-23 Shaikh Mubeena , Apratim Chatterji

The formation of atomic wires via pseudomorphic step-edge decoration on vicinal silicon surfaces has been analyzed for Ga on the Si(112) surface using Scanning Tunneling Microscopy and Density Functional Theory calculations. Based on a…

Materials Science · Physics 2009-11-10 C. Gonzalez , P. C. Snijders , J. Ortega , R. Perez , F. Flores , S. Rogge , H. H. Weitering

Three two-dimensional phosphorus nitride (PN) monolayer sheets (named as $\alpha$-, $\beta$-, and $\gamma$-PN, respectively) with fantastic structures and properties are predicted based on first-principles calculations. The $\alpha$-PN and…

Materials Science · Physics 2015-10-02 ShuangYing Ma , Chaoyu He , L. Z. Sun , Haiping Lin , Youyong Li , K. W. Zhang

One-dimensional NMR spectroscopy is one of the most widely used techniques for the characterization of organic compounds and natural products. For molecules with up to 36 non-hydrogen atoms, the number of possible structures has been…

Pentacene has been used widely in organic devices, and the interface structure between pentacene and a substrate is known to significantly influence device performances. Here we demonstrate that molecular ordering of pentacene on graphene…

Mesoscale and Nanoscale Physics · Physics 2015-06-19 W. Jung , D. -H. Oh , I. Song , H. -C. Shin , S. J. Ahn , Y. Moon , C. -Y. Park , J. R. Ahn

Pentacene crystallizes in a layered structure with a herringbone arrangement within the layers. The electronic properties depend strongly on the stacking of the molecules within the layers (Haddon et al., 2002). We have synthesized four…

Silicene and germanene derivatives constructed from periodic dumbbell units play a crucial role in multilayers of these honeycomb structures. Using first-principles calculations based on density functional theory, here we investigate the…

Mesoscale and Nanoscale Physics · Physics 2014-12-12 V. Ongun Özçelik , D. Kecik , E. Durgun , S. Ciraci

Perfluoropentacene (PFP), an $n$-type organic semiconductor, is deposited at monolayer and bilayer coverage on Cu(111). Scanning tunneling microscopy at various bias voltages is used to investigate the geometric and electronic structure of…

Mesoscale and Nanoscale Physics · Physics 2020-04-22 S. Smalley , P. Darancet , J. R. Guest , J. A. Smerdon

Employing high-vacuum electrospray deposition and scanning tunneling microscopy, we investigated how individual poly(3-hexylthiophene) (P3HT) chains navigated on the periodic energy landscape of a reconstructed Au(111) surface. The…

A set of sp2 amorphous carbons involving natural mineral shungite carbon and antraxolite as well as two synthetic carbon blacks were investigated by using neutron powder diffraction and inelastic neutron scattering at low temperature. NDP…

Pinning single molecules at desired positions can provide opportunities to fabricate bottom-up designed molecular machines. Using the combined approach of scanning tunneling microscopy and density functional theory, we report on tip-induced…

Mesoscale and Nanoscale Physics · Physics 2015-11-17 Yong Chan Jeong , Sang Yong Song , Youngjae Kim , Youngtek Oh , Joongoo Kang , Jungpil Seo

Structural analysis of a layered manganese tungstate diaminoalkane hybrid series suggests that this compound forms a spin-5/2 spin-ladder structure. We use X-ray diffraction, electron microscopy and x-ray absorption spectroscopy results to…

Materials Science · Physics 2007-05-23 B. Ingham , J. L. Tallon , S. V. Chong , R. -S. Liu , L. -Y. Jang

We have used a combined dynamic scanning tunneling and atomic force microscope to study the organisation of weakly bound adsorbed molecules on a graphite substrate. Specifically we have acquired images of islands of the perylene derivative…

Materials Science · Physics 2009-11-13 N. Berdunov , A. J. Pollard , P. H. Beton

Structure and chemical features of layered compounds BaM2Ge4Ch6 (M = Rh, Ir; Ch = S, Se) synthesized under high-pressure and high-temperature method are systematically studied. These compounds crystallize in an orthorhombic phase with space…

Materials Science · Physics 2014-06-13 Hechang Lei , Jun-ichi Yamaura , Jiangang Guo , Yanpeng Qi , Yoshitake Toda , Hideo Hosono
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