Nucleation, growth, and superlattice formation of nanocrystals observed in liquid cell transmission electron microscopy
- PDF / 8,255,932 Bytes
- 14 Pages / 585 x 783 pts Page_size
- 38 Downloads / 215 Views
uction Archaeologists study fossils to recreate history of ecologies, evolutionary events, and climate. Underneath the static structure, the shapes and compositions of fossils are temporal series of forming and deforming governed by environmental factors. On a shorter time scale, materials scientists make nanocrystals out of self-organization of atoms to harness their size and shape-specific optical, electronic and magnetic properties,1–7 or further use the nanocrystals as “artificial atoms” to build higher-order crystalline forms of superlattices,8–10 where the properties of each component nanocrystal couple and hybridize collectively. These nanomaterials also have their structure, shape, and composition encoded by a temporal series of kinetic events during their synthesis, such as nucleation, coalescence, and interconversion among metastable structures.
These events occur at the atomic or nanoscale in a suspended solvent medium, involving dynamic diffusion and interaction of atoms, clusters, or nanocrystals. Resolving and understanding these events will enable predictable control over low-cost and facile bottom-up methods to synthesize functional nanomaterials useful for drug delivery, bioimaging, electronics, photonics, and sensors.11–18 Moreover, knowledge on how the kinetic pathways govern the materials synthesis can potentially enable the theme of “free energy landscape engineering,” where not only the final equilibrium structure, but also the series of metastable states, the depth of local traps, and the interconversion kinetics are better understood. This theme carries the immediate promise of making synthesis more precise, more efficient, and of higher yield. More importantly, one can identify the key kinetic and energetic parameters to
Qian Chen, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, USA; [email protected] Jong Min Yuk, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Korea; [email protected] Matthew R. Hauwiller, Department of Materials Science and Engineering, Massachusetts Institute of Technology, USA; [email protected] Jungjae Park, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Korea; [email protected] Kyun Seong Dae, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Korea; [email protected] Jae Sung Kim, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Korea; [email protected] A. Paul Alivisatos, University of California, Berkeley; Kavli Energy Nanoscience Institute; Lawrence Berkeley National Laboratory, USA; [email protected] doi:10.1557/mrs.2020.229
© 2020 Materials Research Society University of New England, on 10 Sep 2020 at 10:39:36, subject toMRS VOLUME 45 •ofSEPTEMBER 2020at• Downloaded from https://www.cambridge.org/core. theBULLETIN Cambridge• Core terms use, available https://www.cambridge.org/core
Data Loading...
