Ti substituted nano-crystalline Cu3N thin films

Rahmati, Ali; Bidadi, H.; Ahmadi, K.; Hadian, Fatemeh

doi:10.1007/s11998-010-9279-9

Cited by 17 publications

(15 citation statements)

References 39 publications

(46 reference statements)

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“…Indeed, the interposition of Cu atoms in Cu 3 N has been reported in experiments [2,11], and recently, Zn atoms have been doped into the centres of Cu 3 N cells, resulting in a stoichiometry of Cu 3 NZn 0:231 [14,15]. By contrast, doping Ti atoms in Cu 3 N by cylindrical magnetron sputtering method did not result in insertion into the body centred position of the lattice [32], but rather segregated to the grain boundaries [33,34]. The large formation energy, 1.21 eV per Ti atom, explains such a challenge.…”

Section: Resultsmentioning

confidence: 94%

First principles study of 3d transition metal doped Cu3N

Cui

Soon

Phillips

et al. 2012

Journal of Magnetism and Magnetic Materials

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Section: Resultsmentioning

confidence: 94%

First principles study of 3d transition metal doped Cu3N

Cui

Soon

Phillips

et al. 2012

Journal of Magnetism and Magnetic Materials

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“…The evolution of the film lattice constant is due to the variation in nitrogen stoichiometry [24][25][26]. However, there is no information about the position of excess nitrogen in the Cu 3 N unit cell [24].…”

Section: Resultsmentioning

confidence: 99%

“…The refractive index n and the extinction coefficient k as well as the thickness d of polycrystalline nitrided Ti-Cu thin films on thick quartz substrate were studied. They were determined from transmittance data only using PUMA approach and code described by Birgin et al [41] used in our previous work [25,26,31]. Poelman et al [42] have reviewed and tested PUMA approach and shown it to produce excellent estimate of optical constants of thin films.…”

Section: Optical Propertiesmentioning

confidence: 99%

Nitrification of Reactively Magnetron Sputter Deposited Ti-Cu Nano-Composite Thin Films

Rahmati¹

2013

SNL

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A metalloid Ti₁₃Cu₈₇ target was sputtered by reactive DC magnetron sputtering at various substrate temperatures in an Ar-N₂ mixture ambient. The sputtered species were condensed on Si (111), glass slide and Potsssium bromide (KBr) substrates. The as-deposited films were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), optical spectrophotometry and four point probe technique. The as-deposited films present composite structure of nano-crystallite cubic anti-ReO₃ structure of Ti inserted Cu₃N (Ti:Cu₃N) and nano-crystallite face centre cubic (fcc) structure of Cu. The titanium atoms and sequential nitrogen excess form a solid solution within the Cu₃N crystal structure and accommodate in crystal lattice and vacant interstitial site, respectively. Depending on substrate temperature, unreacted N atoms interdiffuse between crystallites and their (and grain) boundaries. The films have agglomerated structure with atomic Ti:Cu ratio less than that of the original targets. A theoretical model has been developed, based on sputtering yield, to predict the atomic Ti:Cu ratio for the as-deposited films. Film thickness, refractive index and extinction coefficient are extracted from the measured transmittance spectra. The films’ resistivity is strongly depending on its microstructural features and substrate temperature.

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“…By increasing ST, more nanorods growth on the planes leading to increasing the intensity. However, increasing the peaks at 37.52° , 38.30° , 37.54° , 38.01° and 38.08° by increasing Au ST demonstrating that the (111) plane is the preferred crystalline growth direction for Au nanorods [32][33][34][35][36] .…”

Section: Structural Propertiesmentioning

confidence: 99%

Negative permittivity and permeability of gold nanostructured thin films in UV–vis region

Jalilian

Edalati-Boostan

Moradian³

2018

J. Nanophoton.

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In this article, we report the growth of gold nanorods on glass substrates and copper nanoparticle thin films by cylindrical direct current magnetron sputtering (CDCMS) at room temperature. The grown gold nanorods have short lengths of < 20nm and show negative optical parameters in UV-Vis region. So far negative permittivity and permeability were only shown for complex artificial structures. In a case of simple structures like gold nanorods, the negative optical parameters were only predicted by simulation methods and considering ideal structures and they were not yet reported by experimental groups, who has grown or synthesis gold nanorods by physical or chemical methods. The small size of gold nanorods and thickness of our samples compare to other experimental groups could be the reason of negative permittivity and permeability in our case. Low loss metamaterials with simultaneously negative permittivity and permeability are desired for practical applications in many optical devices such as optical switching, waveguides, modulators, and plasmonic antenna arrays. The optical properties of the grown gold nanorods were defined by ultraviolet-visible (UV-Vis) spectroscopy and their quality was assessed through multi-technique characterization using transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and energy dispersed X-ray (EDX). KEYWORDSdc magnetron sputtering, localized surface plasmon resonance, metamaterials, nanorods, negative permittivity, negative permeability.------------

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Ti substituted nano-crystalline Cu3N thin films

Cited by 17 publications

References 39 publications

First principles study of 3d transition metal doped Cu3N

First principles study of 3d transition metal doped Cu3N

Nitrification of Reactively Magnetron Sputter Deposited Ti-Cu Nano-Composite Thin Films

Negative permittivity and permeability of gold nanostructured thin films in UV–vis region

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