Nanomaterials with tunable hydrophobicity and hydrophilicity.
Applications include removal of contaminated oil or organic spills on water (hydrophobic properties) as well as removing water droplets from oils (hydrophilic properties).
Large-scale, free-standing structures of advanced nanomaterials for practical applications are currently very difficult to achieve.
The invention includes a simple and rapid approach to controlling surface wetting, based on self-assembled free-standing structures of ultralong manganese oxide nanowires. The nanowire assemblies, composed of micro- and nanoporous structures that span multiple length scales, exhibit a remarkably superhydrophilic response. When coated with a thin layer of hydrophobic molecules, the nanowire assemblies become superhydrophobic. The assemblies of this invention are useful in various applications, including removal of organics or hydrophobic materials, and waterproofing applications.
- Cost-effective fabrication
- High surface area
- Thermal stability
- Self-supporting structures
- High uptake capacity