期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 106, 期 26, 页码 10493-10498出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0900630106
关键词
DNA materials; SAXS; self assembly
资金
- National Science Foundation Nanoscience and Engineering Center
- Air Force Office of Scientific Research
- National Cancer Institute Center for Cancer Nanotechnology Excellence
- National Institutes of Health Director's Pioneer Award
- U.S. Department of Homeland Security Graduate Fellowship
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
We present an analysis of the key steps involved in the DNA-directed assembly of nanoparticles into crystallites and polycrystalline aggregates. Additionally, the rate of crystal growth as a function of increased DNA linker length, solution temperature, and self-complementary versus non-self-complementary DNA linker strands (1- versus 2-component systems) has been studied. The data show that the crystals grow via a 3-step process: an initial random binding'' phase resulting in disordered DNA-AuNP aggregates, followed by localized reorganization and subsequent growth of crystalline domain size, where the resulting crystals are well-ordered at all subsequent stages of growth.
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