Abstract
Nanostructured MnO2 are gaining great research interest because of their wide applications ranging from optical and electronic devices to energy storage and catalysis. However, the formation of a well-defined MnO2 coating on the surface of various colloidal objects has been challenging due to surface incompatibility. Here, we report a unique and robust surface-initiated redox route to the controlled deposition of MnO2 on colloidal particles, which can be employed to produce high-quality hollow MnO2 nanoshells and a variety of MnO2 coated nanocomposites. Colloidal resorcinol formaldehyde (RF) resin spheres serve as both reducing agents and sacrificial templates to initiate the controlled deposition of MnO2 on their surfaces. Further, the RF resin can also be coated on the surface of other colloidal nanostructures to allow overcoating of MnO2 through the redox reaction and produce nanocomposites such as SiO2@MnO2 and Au@MnO2. The size and thickness of the MnO2 nanoshells can be tuned precisely to induce resonant Mie scattering, leading to bright colorations that can shift reversibly in response to the changes in the refractive index of the surroundings.
Original language | English |
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Pages (from-to) | 1186-1190 |
Number of pages | 5 |
Journal | ChemNanoMat |
Volume | 6 |
Issue number | 8 |
DOIs | |
State | Published - Aug 1 2020 |
Externally published | Yes |
Funding
Yin is grateful for the financial support from the U.S. National Science Foundation (DMR‐1810485) and the Committee on Research (CoR) Grant from the UCR Academic Senate. Yin is grateful for the financial support from the U.S. National Science Foundation (DMR-1810485) and the Committee on Research (CoR) Grant from the UCR Academic Senate.
Keywords
- MnO
- hollow nanostructures
- redox reaction
- resonant Mie scattering
- resorcinol formaldehyde
- template