Effects of native oxidation on Ti/TiO2 nanodot arrays and their plasmonic properties compared to Au nanodot arrays

Jung, Mi; Choi, Young‐Wan

doi:10.1016/j.apsusc.2021.149636

Cited by 10 publications

(5 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the lattice Ti-O bond in the segment of TiO 2 in Fig. 2(c), the O 1s core degree spectra of TiO 2 have a center at a wavelength of 530.2 eV [22]. O 1s spectra of CNT/TiO 2 suggests one issue based at 521.6 eV essentially, which is ascribed to the oor oxygen complicated of carbon phase.…”

Section: Resultsmentioning

confidence: 96%

Co-CNT/TiO2 composites effectively improved the photocatalytic degradation of malachite green

Zhang¹,

Liang²,

Liu

2023

Preprint

View full text Add to dashboard Cite

Although tremendous progress has recently been made in multi-walled carbon nanotubes (MWCNT), and titania. However, the photocatalytic degradation efficiency is still greatly limited by the ideal cobalt dopant concentration and temperature. Herein, Co-CNT/TiO2 composites were used to improve the photocatalytic degradation efficiency of malachite green (MG) solution. Consequently, compared to the binary CNT/TiO2 and pure TiO2 samples, the ternary Co-CNT/TiO2 samples had much better photocatalytic activity. The sample calcined at 500°C showed better reactivity, and the ideal cobalt dopant concentration was 0.5% for the highest photocatalytic degradation.

show abstract

Section: Resultsmentioning

confidence: 96%

Co-CNT/TiO2 composites effectively improved the photocatalytic degradation of malachite green

Zhang¹,

Liang²,

Liu

2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Nanostructured Ag and Au are known to generate hot spots associated with greatly enhanced electric fields due to the LSPR effect (Anker et al, 2008). In addition, Jung and Choi confirmed experimentally that the intensity of peaks in the Raman spectra of Ti nanodots with native oxide layers was enhanced, presumably due to the stronger electric field of the incident laser beam, although the degree of enhancement was much smaller than that observed in the case of Au (Jung and Choi, 2021). In the nanogrooves with finite length, the hot spots are a type of standing wave that occurs during the resonance, and are therefore generated periodically.…”

Section: Effect Of Number Of Intra-pulses On Lipss Morphologymentioning

confidence: 84%

Formation of two-dimensional laser-induced periodic surface structures on titanium by GHz burst mode femtosecond laser pulses

Kawabata,

Bai,

Obata

et al. 2023

Front. Nanotechnol.

View full text Add to dashboard Cite

GHz burst mode femtosecond (fs) laser pulses, which consist of a series of pulse trains with ultra-fast intervals of several hundred picoseconds, have offered distinct features for material processing compared to conventional irradiation of laser pulses (single-pulse mode). We apply GHz burst mode processing to fabricate laser-induced periodic surface structures (LIPSS) on the material surfaces. In our previous work for silicon (Si), we have found that GHz burst mode can create unique two-dimensional (2D) LIPSS composed of both parallel and perpendicular to the laser polarization direction. We proposed that the formation of 2D-LIPSS is attributed to the synergetic contributions of electromagnetic and hydrodynamic mechanisms. To further investigate more detailed formation mechanisms and explore practical applications, we employ titanium (Ti), whose properties are significantly different from Si. We demonstrate that GHz burst mode fs laser pulses (central wavelength: 1,030 nm, intra-pulse width: 230 fs, intra-pulse repetition rate (an intra-pulse interval): 4.88 GHz (205 ps) and burst pulse repetition rate: 10 kHz) can also fabricate 2D-LIPSS on Ti surfaces. We attribute the dominant formation mechanism of 2D-LIPSS to the generation of hot spots with highly enhanced electric fields due to transient change of material properties during GHz burst pulse irradiation. Based on this speculation, properly tailoring the shapes of the burst pulse with an optimum intra-pulse number enables the creation of well-defined 2D-LIPSS. Furthermore, essentially homogeneous 2D-LIPSS can be formed in a large area by laser scanning of a focused fs laser beam with a stage scanning speed of 5 mm/s.

show abstract

“…Metallic nanoparticles usually possess localized surface plasmon resonance (LSPR) due to the coherent collective oscillation of delocalized electrons in response to the electromagnetic field of a certain wavelength. Metallic Ti will yield a plasmonic resonance in the visible wavelength at around 400-500 nm, while oxidized TiO 2 will absorb in the UV range below 400 nm due to the wide bandgap (3.0-3.2 eV) [47][48][49]. UVvis absorption spectra were measured to examine the optical absorption of the nanoparticle films, as depicted in Figure S6.…”

Section: Secondary H 2 Plasma Treatmentmentioning

confidence: 99%

Nonthermal Plasma Synthesis of Metallic Ti Nanocrystals

Tu,

Poerschke,

Kortshagen

2024

Nanomaterials

View full text Add to dashboard Cite

Nanoscale metallic titanium (Ti) offers unique energetic and biocompatible characteristics for the aerospace and biomedical industries. A rapid and sustainable method to form purified Ti nanocrystals is still in demand due to their high oxygen affinity. Herein, we report the production of highly purified Ti nanoparticles with a nonequilibrium face center cubic (FCC) structure from titanium tetrachloride (TiCl4) via a capacitively coupled plasma (CCP) route. Furthermore, we demonstrate a secondary H2 treatment plasma as an effective strategy to improve the air stability of a thin layer of nanoparticles by further removal of chlorine from the particle surface. Hexagonal and cubic-shaped Ti nanocrystals of high purity were maintained in the air after the secondary H2 plasma treatment. The FCC phase potentially originates from small-sized grains in the initial stage of nucleation inside the plasma environment, which is revealed by a size evolution study with variations of plasma power input.

show abstract

Effects of native oxidation on Ti/TiO2 nanodot arrays and their plasmonic properties compared to Au nanodot arrays

Cited by 10 publications

References 67 publications

Co-CNT/TiO2 composites effectively improved the photocatalytic degradation of malachite green

Co-CNT/TiO2 composites effectively improved the photocatalytic degradation of malachite green

Formation of two-dimensional laser-induced periodic surface structures on titanium by GHz burst mode femtosecond laser pulses

Nonthermal Plasma Synthesis of Metallic Ti Nanocrystals

Contact Info

Product

Resources

About