期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 112, 期 31, 页码 9563-9567出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1504677112
关键词
phase separation; superlattices; crystalline phases; stoichiometry
资金
- US Department of Energy (DOE), Basic Energy Sciences, Materials Science and Engineering Division
- US DOE [DE-AC02-07CH11358]
The solid-phase diagram of binary systems consisting of particles of diameter sigma(A) = sigma and sigma(B) = gamma sigma (gamma <= 1) interacting with an inverse p = 12 power law is investigated as a paradigm of a soft potential. In addition to the diameter ratio. that characterizes hard-sphere models, the phase diagram is a function of an additional parameter that controls the relative interaction strength between the different particle types. Phase diagrams are determined from extremes of thermodynamic functions by considering 15 candidate lattices. In general, it is shown that the phase diagram of a soft repulsive potential leads to the morphological diversity observed in experiments with binary nanoparticles, thus providing a general framework to understand their phase diagrams. Particular emphasis is given to the two most successful crystallization strategies so far: evaporation of solvent from nanoparticles with grafted hydrocarbon ligands and DNA programmable self-assembly.
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