Mesophase Formation Stabilizes High-Purity Magic-Sized Clusters
نویسندگان
چکیده
منابع مشابه
Polymorphism in magic-sized Au144(SR)60 clusters
Ultra-small, magic-sized metal nanoclusters represent an important new class of materials with properties between molecules and particles. However, their small size challenges the conventional methods for structure characterization. Here we present the structure of ultra-stable Au144(SR)60 magic-sized nanoclusters obtained from atomic pair distribution function analysis of X-ray powder diffract...
متن کاملPossible paths towards magic clusters formation
Using a virtual probe method in molecular dynamics approach, we have explored the growing process of atomic clusters by adding atoms in a one-by-one manner to a tetrahedron up to 50 atoms and found that the growing path repeats a process of split-then-merge chaining. The sequential chains merge in the vicinity of the ones with atoms of magic number and then diverge, meaning that, in the cluster...
متن کاملMagic-sized diamond nanocrystals.
The 2D structural transformation of a heavily boron-doped diamond surface has been revealed using scanning tunneling microscopy (STM). We found that at boron densities above the metal-insulator transition the diamond surface is comprised of spatially ordered magic-sized nanocrystals. The development of quantized electron gas inside these nanocrystals is directly confirmed by STM observation of ...
متن کاملMedium-sized double magic metal clusters: Al@Cu(54) (-) and Al@Ag(54) (-).
Medium-sized double magic metal clusters, Al@Ag(54) (-) and Al@Cu(54) (-), are predicted based on unbiased global search and density functional calculation. Both bimetallic core-shell clusters have icosahedral symmetry, and they are much lower in energies than all other low-lying isomers. In contrast, the icosahedral cluster Al@Au(54) (-) is a high-energy isomer. Both Al@Ag(54) (-) and Al@Cu(54...
متن کاملMagic polyicosahedral core-shell clusters.
A new family of magic cluster structures is found by genetic global optimization, whose results are confirmed by density functional calculations. These clusters are Ag-Ni and Ag-Cu nanoparticles with an inner Ni or Cu core and an Ag external shell, as experimentally observed for Ag-Ni, and present a polyicosahedral character. The interplay of the core-shell chemical ordering with the polyicosah...
متن کاملذخیره 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: Journal of the American Chemical Society
سال: 2018
ISSN: 0002-7863,1520-5126
DOI: 10.1021/jacs.7b12175