Publications

Strain Control of Oxygen Vacancies in Epitaxial Strontium Cobaltite Films

Journal: Advanced Functional Materials

The ability to manipulate oxygen anion defects rather than metal cations in complex oxides can facilitate creating new functionalities critical for emerging energy and device technologies. However, the difficulty in activating oxygen at reduced temperatures hinders the deliberate control of important defects, ...

Tire-derived carbon composite anodes for sodium-ion batteries

Journal: Journal of Power Sources

Hard-carbon materials are considered as one of the most promising anodes for the emerging sodium-ion batteries. Here, we report a low-cost, scalable waste tire-derived carbon as an anode for sodium-ion batteries (SIBs). Tire-derived carbons obtained by pyrolyzing acid-treated tire at 1100 C, 1400 C and 1600 C show...

Unraveling the Mechanism of Nanoscale Mechanical Reinforcement in Glassy Polymer Nanocomposites

Journal: Nano Letters

The mechanical reinforcement of polymer nanocomposites (PNCs) above the glass transition temperature, Tg, has been extensively studied. However, not much is known about the origin of this eff ect below Tg . In this Letter, we unravel the mechanism of PNC reinforcement within the glassy state...

Surface control of epitaxial manganite films via oxygen pressure

Journal: ACS Nano

The trend to reduce device dimensions demands increasing attention to atomic-scale details of structure of thin films as well as to pathways to control it. This is of special importance in the systems with multiple competing interactions. We have used in situ scanning tunneling microscopy to image surfaces...

Aqueous proton transfer across single-layer graphene

Journal: Nature Comm.

Proton transfer across single-layer graphene proceeds with large computed energy barriers and is therefore thought to be unfavourable at room temperature unless nanoscale holes or dopants are introduced, or a potential bias is applied. Here we subject single-layer graphene supported on fused ​silica to cycles of...

Porous Liquids: A Promising Class of Media for Gas Separations

Journal: Angew. Chem., Int. Ed.

a) SEM and b) TEM images of HS-liquid. (hi-res image) A porous liquid containing empty cavities has been successfully fabricated by surface engineering of hollow structures with suitable corona and canopy species. By taking advantage of the liquid-like polymeric matrices as a separation medium and...

Spectroscopic Investigation of Surface-Dependent Acid Base Property of Ceria Nanoshapes

Journal: J. Phys. Chem. C

In addition to their well-known redox character, the acid–base property is another interesting aspect of ceria-based catalysts. Herein, the effect of surface structure on the acid–base property of ceria was studied in detail by utilizing ceria nanocrystals with different morphologies (cubes, octahedra, and rods)...