STEM characterization on silica nanowires with new mesopore structures by space-confined self-assembly within nano-scale channels

Journal Article · Wed Jan 23 04:00:00 EST 2008 · ChemComm

DOI:https://doi.org/10.1039/b717461f· OSTI ID:993465

Lai, Peng ^[1]; Hu, Michael Z. ^[2]; Shi, Donglu ^[3]; Blom, Douglas ^[2]

---

1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Cincinnati, OH (United States). Dept. of Chemical and Materials Engineering
2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
3. Univ. of Cincinnati, OH (United States). Dept. of Chemical and Materials Engineering

We found critical channel diameters (below which space confinement takes effect, leading to more uniform and ordered mesopore structures) in the study of evaporation-induced coassembly of triblock-copolymer (P123) and silica molecular precursors (TEOS, tetraethyl orthosilicate) by employing channels in anodized aluminum oxide (AAO, 13$$-$$200 nm channel diameter) and in track-etched polycarbonate (EPC, 10$$-$$80 nm channel diameter) and for the first time we have observed a new mesopore structure (i.e., packed hollow spheres) in silica nanowires formed in AAO channels with diameters from 30 to 80 nm.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Temperature Materials Laboratory (HTML)
• Sponsoring Organization: USDOE Office of Science (SC); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 993465
• Journal Information: ChemComm, Journal Name: ChemComm Journal Issue: 11; ISSN CHCOFS; ISSN 1359-7345
• Publisher: Royal Society of Chemistry
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE