Results 61 to 70 of about 362,217 (292)

Nanoparticles exhibiting virus-mimic surface topology for enhanced oral delivery

Nature Communications, 2023
The oral delivery of nano-drug delivery systems (Nano-DDS) remains a challenge. Taking inspirations from viruses, here we construct core–shell mesoporous silica nanoparticles (NPs, ~80 nm) with virus-like nanospikes (VSN) to simulate viral morphology ...
Zhentao Sang, Lu Xu, Renyu Ding, Minjun Wang, Xiaoran Yang, Xitan Li, Bingxin Zhou, Kaijun Gou, Yang Han, Tingting Liu, Xuchun Chen, Ying Cheng, Huazhe Yang, Heran Li   +13 more
doaj   +1 more source

Emergent quantum confinement at topological insulator surfaces

, 2012
Bismuth-chalchogenides are model examples of three-dimensional topological insulators. Their ideal bulk-truncated surface hosts a single spin-helical surface state, which is the simplest possible surface electronic structure allowed by their non-trivial $
AA Mostofi, C Chen, CL Kane, CP Vicente, CR Ast, D Hsieh, DO Scanlon, E Frantzeskakis, F Zhang, H Lin, H Mirhosseini, H Zhang, HJ Noh, HM Benia, I Souza, J Kuneš, JP Perdew, K Ishizaka, L Fu, LA Wray, M Bianchi, M Bianchi, M Bianchi, MG Vergniory, MS Bahramy, MS Bahramy, MZ Hasan, OV Yazyev, PDC King, PDC King, PDC King, PDC King, S Basak, S Souma, S-Y Xu, SR Park, T Menshchikova, T Valla, W Jung, W Meevasana, Y Ishida, Y Xia, YA Bychkov, YH Wang, YL Chen, Z-H Zhu   +45 more
core   +2 more sources

Topology beyond the horizon: how far can it be probed? [PDF]

, 2015
The standard cosmological model does not determine the spatial topology of the universe. This article revisits the signature of a non-trivial topology on the properties of the cosmic microwave background anisotropies.
Fabre, Ophélia, Prunet, Simon, Uzan, Jean-Philippe   +2 more
core   +1 more source

A Simulative Approach for the Prediction of Mesoscale Residual Stress Fields in Solution‐Strengthened Ferritic Ductile Iron

Advanced Engineering Materials, EarlyView.
This study presents a 3D representative volume element‐based simulation approach to predict mesoscopic residual stress and strain fields in silicon solid solution‐strengthened ductile cast iron. By modeling phase transformation kinetics with an enhanced Johnson–Mehl–Avrami–Kolmogorov model, the effects of varying cooling rates on residual stresses are ...
Lutz Horbach, Oliver Schenk, Valérian Iss, Ali Rajaei, Jiali Zhang, Felix Weber, Christoph Broeckmann   +6 more
wiley   +1 more source

Water surface topology of supercritical junction flow

Journal of Hydrology and Hydromechanics, 2019
The complexity of flow conditions at junctions amplifies significantly with supercritical flow. It is a pronounced three-dimensional two-phased flow phenomenon, where standing waves with non-stationary water surface are formed.
Rak Gašper, Hočevar Marko, Steinman Franci   +2 more
doaj   +1 more source

On the profinite rigidity of surface groups and surface words

Comptes Rendus. Mathématique, 2021
Surface groups are determined among limit groups by their profinite completions. As a corollary, the set of surface words in a free group is closed in the profinite topology.
Wilton, Henry
doaj   +1 more source

Controlling a Van Hove singularity and Fermi surface topology at a complex oxide heterostructure interface. [PDF]

, 2019
The emergence of saddle-point Van Hove singularities (VHSs) in the density of states, accompanied by a change in Fermi surface topology, Lifshitz transition, constitutes an ideal ground for the emergence of different electronic phenomena, such as ...
Ahadi, Kaveh, Denlinger, Jonathan D, Lanzara, Alessandra, Marshall, Patrick B, Mori, Ryo, Stemmer, Susanne   +5 more
core  

The thick-thin decomposition and the bilipschitz classification of normal surface singularities

, 2012
We describe a natural decomposition of a normal complex surface singularity $(X,0)$ into its "thick" and "thin" parts. The former is essentially metrically conical, while the latter shrinks rapidly in thickness as it approaches the origin.
A. BernigA. Lytchak, A. Fernandes, A. Parusiński, A.H. Durfee, Anne Pichon, F. Hirzebruch, F. Waldhausen, J. Snoussi, J.-F. Boutot, L. Birbrair, L. Birbrair, L. Birbrair, Lev Birbrair, M Hochster, M. Nagase, M. Spivakovsky, W.D. Neumann, Walter D. Neumann   +17 more
core   +5 more sources

Novel Surface‐Based Bézier Metamaterials: A Higher Degree of Parametrization toward Tailoring the Effective Properties under Compression

Advanced Engineering Materials, EarlyView.
Cubic Bézier curves are used in the synthesis of novel surface‐based metamaterials with tunable mechanical properties. Surface‐based geometries are 3D printed and tested in compression. The resulting mechanical properties are correlated to changes in the shape of the base curve, with high potential in energy absorption through the adjustment of their ...
Alberto Álvarez‐Trejo, Enrique Cuan‐Urquizo, Armando Roman‐Flores   +2 more
wiley   +1 more source

Electronic structure of periodic curved surfaces -- topological band structure

, 2001
Electronic band structure for electrons bound on periodic minimal surfaces is differential-geometrically formulated and numerically calculated. We focus on minimal surfaces because they are not only mathematically elegant (with the surface characterized ...
A. Mackay, A.L. Mackay, A.L. Mackay, B.S. DeWitt, D. Cvijović, D. Takeda, D. Vanderbilt, H. Aoki, H. Morise, H. Terrones, J. Klinowski, K. Kuroki, K. Moriguchi, M. Fujita, M. Ikegami, M. Ikegami, M. Koshino, M. O’Keeffe, N. Ogawa, O.D. Friedrichs, S.J. Townsend, S.T. Hyde, T. Kyotani, T. Lenosky   +23 more
core   +1 more source