Titanium Nitride Nanorod Research Articles

A PtPdCu thin-film catalyst based on titanium nitride nanorod arrays with high catalytic performance for methanol electro-oxidation

Here, we present a novel MOR anode catalyst based on TiN nanorod arrays with high performance towards MOR.

Surface enhanced Raman scattering substrates based on titanium nitride nanorods

TiN nanorod arrays (NRs) were prepared using a hydrothermal process followed by nitridation in ammonia atmosphere. The fabricated TiN NRs were characterized by UV–vis spectroscopy, X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and Transmission electron microscopy (TEM). The Surface-enhanced Raman scattering (SERS) activity of these substrates was evaluated by using Rhodamine (R6G) and crystal violet (CV) as the probe molecules. Results showed that TiN NRs prepared at 900°C exhibited the strongest Raman enhancement performance. The average sizes of the TiN NRs were 57nm. The TiN NRs had an absorption peak around 524nm, which related to surface Plasmon resonance. Compared to the CV molecules, the R6G molecules can obtain a higher enhancement in our substrate. The enhancement factor ((8.9±0.2)×103) and the R6G detection limit (10−6M) were achieved. The results showed that the TiN NRs are a kind of promising materials as SERS sensor.

Fabrication and Field-Emission Characteristics of TiN Nanorods with a Concave Top Surface

Well-ordered titanium nitride nanorods were fabricated by reactive ion etch using titanium oxide nanodots as the mask, which were prepared using the anodic aluminum oxide templation method. The TiN nanorods exhibited a concave top surface with a protruding edge. Due to the protruding top edge and a high aspect ratio, the TiN nanorods showed a low turn-on voltage of 1.6 V/μm. The ellipsoidal cylinder model was used to evaluate the field-enhancement effect of the protruding edge, and an underestimation by ∼ 26% was found as compared with the enhancement factor derived from the Fowler-Nordheim plot.

Low-temperature, solvent-free solid-state synthesis of single-crystalline titanium nitride nanorods with different aspect ratios

Titanium nitride nanorods have been successfully synthesized by low temperature solid-state metathesis of titanium (III) chloride and sodium azide without using any organic solvent. The conditions required for the synthesis of these nanorods have been optimized. It was found that the temperature and time of reaction had a significant effect on the product morphology. Thermal treatment at 360 °C, for 3 days gave the nanorods of the aspect ratio ∼10 (i.e. diameter ∼50 nm and length ∼ 500 nm), whereas the thermal treatment at 400 °C for 3 days gave the nanorods of the aspect ratio ∼50 (i.e. diameter ∼50 nm and length ∼2–3 μm). Scanning and transmission electron microscopies clearly showed the rod-type morphology. Further evidence for the phase purity and crystallinity of titanium nitride nanorods was given by X-ray diffraction, field emission high-resolution electron microscopy and X-ray photoelectron spectroscopy analyses.