Analysis of photoluminescence background of Raman spectra of carbon nanotips grown by plasma-enhanced chemical vapor deposition

Wang, B; Ostrikov, Kostya Ken; Tsakadze, Zviad; Xu, Shuyan

doi:10.1063/1.3168496

Cited by 8 publications

(4 citation statements)

References 50 publications

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“…5(e) and 5(f) is due to the Eu PL background. 35 The low intensity broad peak in Fig. 5(f) is good agreement with the Eu precipitation after annealing at 700°C.…”

Section: Resultssupporting

confidence: 67%

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Intense luminescence emission and lattice damage of the implanted Eu ions in KTiOPO4 crystals

Cui

Yuan

et al. 2022

Opt. Eng.

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.The doping of rare earth elements revolutionized applications of optoelectronic devices. Europium (Eu) ions acting as activators can provide the fundamental effect on luminescence of host materials. We investigate photoluminescence, lattice damage formation of Eu-implanted potassium titanyl phosphate (KTiOPO4) crystals using 400-keV Eu ions with a fluence of 5 × 1015 ions / cm2 at room temperature. Effective doping is achieved in the depth range of about 50 to 200 nm from the surface of KTiOPO4 crystal, and the luminescent activity of Eu ions is inhibited due to significant implantation damage. However, the samples showed intense luminescence emission at room temperature through the lattice recovery after annealing at 600°C and 700°C. The lattice damage of as-implanted and annealed samples was investigated by Rutherford backscattering spectrometry in channeling configuration. Furthermore, the relative strain depth curves of Eu implanted KTiOPO4 samples at different annealing temperatures were studied using the high resolution x-ray diffraction and Raman spectra. The present research reveals that Eu implanted KTiOPO4 samples have great prospects in the field of optical applications and waveguide quantum reservoirs.

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“…5(e) and 5(f) is due to the Eu PL background. 35 The low intensity broad peak in Fig. 5(f) is good agreement with the Eu precipitation after annealing at 700°C.…”

Section: Resultssupporting

confidence: 67%

“…The broad peak at 2434 cm−1 in Figs. 5(e) and 5(f) is due to the Eu PL background 35 . The low intensity broad peak in Fig.…”

Section: Resultsmentioning

confidence: 93%

Intense luminescence emission and lattice damage of the implanted Eu ions in KTiOPO4 crystals

Cui

Yuan

et al. 2022

Opt. Eng.

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“…Nanotips/Nanocones of different materials (carbon, silicon, poly silicon, GaN, GaP, sapphire, Al, AlN, ZnO, and ZnCdSeTe) have been produced using techniques such as self-masking dry etching technique in an electron cyclotron resonance (ECR) plasma process, vapor-liquid-solid (VLS) mechanism, thermal evaporation technique, chemical vapor deposition (CVD), plasmaenhanced hot filament CVD, Physical Vapor deposition [2][3][4][5][6][7]. However, the femtosecond laserinduced breakdown is attracting major interest of research for many investigators around the world for number of reasons.…”

Section: List Of Figuresmentioning

confidence: 99%

Synthesis of Nanotips Through Femtosecond Laser Ablation of Glass with Assisted Gas

Patel¹

2021

Preprint

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Nanotips are the key nanostructures for many applications. Until now, the nanotips of only the crystalline materials have been produced via various deposition methods which require sophisticated equipment, high vacuum, and clean room operations. This thesis proposes a single step, rapid synthesis method using femtosecond laser irradiation at megahertz frequency with background flow of nitrogen gas at ambient conditions. Amorphous nanotips are obtained without the use of catalyst. The nanotips grow from highly energetic plasma generated when target is irradiated with laser pulses. The vapor condensates, nanoparticles and droplets from the plasma get deposited back on to the hot target surface where they experience force imbalance due to which the stems for the nanotips growth are initiated. Once the stems are generated, the continuous deposition of vapor condensates [sic] provides building materials to the stems to complete the growth of nanotips. Further study found that the growth of the nanotips is influenced by laser parameters and gas conditions.

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“…The peaks at ~ 1365 and 1610 cm -1 are the D and G peaks of amorphous carbon, and the peak at about 2123 cm -1 is related to the C-N bonds [25,26]. respectively.…”

Section: Structure and Composition Of Samplesmentioning

confidence: 99%

Carbon nanoflake-nanoparticle interface: A comparative study on structure and photoluminescent properties of carbon nanoflakes synthesized on nanostructured gold and carbon by hot filament CVD

Wang

Zhu

et al. 2017

Carbon

Self Cite

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Three dimensional vertically-oriented carbon nanoflakes grown on carbon and gold nanoparticles by the hot filament chemical vapor deposition in CH 4 environment demonstrate quite similar structure and composition, but drastically different room temperature photoluminescent properties. The interfacial interactions were asserted to be the main reason for the differences in the optical emission. The mechanisms of highly oriented growth, generation and enhancement of photoluminescence were investigated, and it was demonstrated that the formation of oriented nanoflakes resulted from the stress produced in the carbon layers on carbon and gold nanoparticles. Specifically, deformation of nanoparticles and difference in the expansion rates of carbon layer, gold and carbon nanoparticles are the main causes for the stress formation. The oriented growth of carbon nanoflakes is maintained by the repulsion effect between the carbon nanoflakes due to the net charge produced from the hydrocarbon radicals on the edges of carbon nanoflakes via charge transfer between H and C atoms. The photoluminescence generation of carbon nanoflakes is related to the sp 2 carbon clusters on the edges of carbon nanoflakes. Strong green photoluminescent emission from the carbon nanoflake/gold nanoparticle system than from the carbon nanoflake/carbon nanoparticle system is the result of the intense plasmon emission from gold nanoparticles..

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Analysis of photoluminescence background of Raman spectra of carbon nanotips grown by plasma-enhanced chemical vapor deposition

Cited by 8 publications

References 50 publications

Intense luminescence emission and lattice damage of the implanted Eu ions in KTiOPO4 crystals

Intense luminescence emission and lattice damage of the implanted Eu ions in KTiOPO4 crystals

Synthesis of Nanotips Through Femtosecond Laser Ablation of Glass with Assisted Gas

Carbon nanoflake-nanoparticle interface: A comparative study on structure and photoluminescent properties of carbon nanoflakes synthesized on nanostructured gold and carbon by hot filament CVD

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