Journal
NANO LETTERS
Volume 12, Issue 7, Pages 3872-3877Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl302206s
Keywords
Mesoporosity; colloidal nanocrystals; block copolymers; chemical interactions
Categories
Funding
- DOE
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- Office of Vehicle Technologies of the U.S. Department of Energy [DE-AC02-05CH11231]
- F.R.S.-FNRS (National Fund for Scientific Research in Belgium)
- Fulbright Scholar Program
- WBI.World
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The properties of mesoporous materials hinge on control of their composition, pore dimensions, wall thickness, and the size and shape of the crystallite building units. We create ordered mesoporous materials in which all of these parameter; are independently controlled. Different sizes (from 4.5 to 8 nm) and shapes (spheres and rods) of ligand-stripped nanocrystals are assembled using the same structure-directing block copolymers, which contain a tethering domain designed to adsorb to their naked surfaces. Material compositions range from metal oxides (Sn-doped In2O3 or ITO, CeO2, TiO2) to metal fluorides (Yb,Er-doped NaYF4) and metals (FePt). The incorporation of new types of nanocrystals into mesoporous architectures can lead to enhanced performance. For example, TiO2 nanorod-based materials withstand >1000 electrochemical cycles without significant degradation.
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