Quantum size effects in TiO<sub>2</sub> thin films grown by atomic layer deposition

Tallarida, Massimo; Das, Chittaranjan; Schmeißer, Dieter

doi:10.3762/bjnano.5.7

Cited by 17 publications

(8 citation statements)

References 33 publications

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“…The energy resolution at the N K-edge is better than 0.2 eV. The effectiveness of such in-situ growth using SXAS has been amply demonstrated during the growth of Cr [66], TiO 2 [67], TiN [68] and very recently for Fe films on MgO [69].…”

Section: In-situ System At Sxas Beamlinementioning

confidence: 99%

In-situ growth of iron mononitride thin films studied using x-ray absorption spectroscopy and nuclear resonant scattering

et al. 2019

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We studied the structural and magnetic properties of in-situ grown iron mononitride (FeN) thin films. Initial stages of film growth were trapped utilizing synchrotron based soft x-ray absorption near edge spectroscopy (XANES) at the N K-edge and nuclear resonant scattering (NRS). Films were grown using dcmagnetron sputtering, separately at the experimental stations of SXAS beamline (BL01, Indus 2) and NRS beamline (P01, Petra III). It was found that the initial stages of film growth differs from the bulk of it. Ultrathin FeN films, exhibited larger energy separation between the t 2g and e g features and an intense e g feature in the N K-edge pattern. This indicates that a structural transition is taking place from the rock-salt (RS)-type FeN to zinc-blende (ZB)-type FeN when the thickness of films increases beyond 5 nm. The behavior of such N K-edge features correlates very well with the emergence of a magnetic component appearing in the NRS pattern at 100 K in ultrathin FeN films. Combining the in-situ XANES and NRS measurements, it appears that initial FeN layers grow in a RS-type structure having a magnetic ground state. Subsequently, the structure changes to ZB-type which is known to be non-magnetic. Observed results help in resolving the long standing debate about the structure and the magnetic ground state of FeN.

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Section: In-situ System At Sxas Beamlinementioning

confidence: 99%

In-situ growth of iron mononitride thin films studied using x-ray absorption spectroscopy and nuclear resonant scattering

et al. 2019

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“…The energy resolution at the N K-edge is better than 0.2 eV. The effectiveness of such insitu growth using SXAS has been amply demonstrated during the growth of Cr [66], TiO 2 [67], TiN [68] and very recently for Fe films on MgO [69].…”

Section: Methodsmentioning

confidence: 99%

Magnetism and structure of in-situ grown FeN films studied using N K-edge XAS and nuclear resonance scattering

Gupta¹,

Pandey²,

Niti³

et al. 2019

Preprint

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We studied the structural and magnetic properties of in-situ grown iron mononitride (FeN) thin films. Initial stages of film growth were trapped utilizing synchrotron based soft x-ray absorption near edge spectroscopy (XANES) at the N K-edge and nuclear resonant scattering (NRS). Films were grown using dc-magnetron sputtering, separately at the experimental stations of SXAS beamline (BL01, Indus 2) and NRS beamline (P01, Petra III). It was found that the initial stages of film growth differs from the bulk of it. Ultrathin FeN films, exhibited larger energy separation between the t2g and eg features and an intense eg feature in the N K-edge pattern. This indicates that a structural transition is taking place from the rock-slat (RS)-type FeN to zinc-blende(ZB)-type FeN when the thickness of films increases beyond 5 nm. The behavior of such N K-edge features correlates very well with the emergence of a magnetic component appearing in the NRS pattern at 100 K in ultrathin FeN films. Combining the in-situ XANES and NRS measurements, it appears that initial FeN layers grow in RS-type structure having a magnetic ground state. Subsequently, the structure changes to ZB-type which is known to be non-magnetic. Observed results help in resolving the long standing debate about the structure and the magnetic ground state of FeN.

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“…In a recent work, the CsPbBr 3 QDs with tunable particle sizes (3–12 nm) (Figure b) were successfully prepared by simply adjusting the reaction temperature, and their size‐dependent CO 2 reduction performance was then explored. It was demonstrated that the absorption edges of CsPbBr 3 QDs could be red‐shifted in the visible light region with the increment of the particle size probably owing to the quantum size effects . That is to say, the optical absorption properties and bandgap structure of the prepared CsPbBr 3 QDs could be effectively regulated by the quantum size.…”

Section: Photoelectrochemical Applications Of Ihpqdsmentioning

confidence: 99%

Recent Progress and Development in Inorganic Halide Perovskite Quantum Dots for Photoelectrochemical Applications

Liang

Chen

Yao

et al. 2019

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Inorganic halide perovskite quantum dots (IHPQDs) have recently emerged as a new class of optoelectronic nanomaterials that can outperform the existing hybrid organometallic halide perovskite (OHP), II–VI and III–V groups semiconductor nanocrystals, mainly due to their relatively high stability, excellent photophysical properties, and promising applications in wide‐ranging and diverse fields. In particular, IHPQDs have attracted much recent attention in the field of photoelectrochemistry, with the potential to harness their superb optical and charge transport properties as well as spectacular characteristics of quantum confinement effect for opening up new opportunities in next‐generation photoelectrochemical (PEC) systems. Over the past few years, numerous efforts have been made to design and prepare IHPQD‐based materials for a wide range of applications in photoelectrochemistry, ranging from photocatalytic degradation, photocatalytic CO2 reduction and PEC sensing, to photovoltaic devices. In this review, the recent advances in the development of IHPQD‐based materials are summarized from the standpoint of photoelectrochemistry. The prospects and further developments of IHPQDs in this exciting field are also discussed.

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Quantum size effects in TiO₂ thin films grown by atomic layer deposition

Cited by 17 publications

References 33 publications

In-situ growth of iron mononitride thin films studied using x-ray absorption spectroscopy and nuclear resonant scattering

In-situ growth of iron mononitride thin films studied using x-ray absorption spectroscopy and nuclear resonant scattering

Magnetism and structure of in-situ grown FeN films studied using N K-edge XAS and nuclear resonance scattering

Recent Progress and Development in Inorganic Halide Perovskite Quantum Dots for Photoelectrochemical Applications

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Quantum size effects in TiO2 thin films grown by atomic layer deposition

Cited by 17 publications

References 33 publications

In-situ growth of iron mononitride thin films studied using x-ray absorption spectroscopy and nuclear resonant scattering

In-situ growth of iron mononitride thin films studied using x-ray absorption spectroscopy and nuclear resonant scattering

Magnetism and structure of in-situ grown FeN films studied using N K-edge XAS and nuclear resonance scattering

Recent Progress and Development in Inorganic Halide Perovskite Quantum Dots for Photoelectrochemical Applications

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Quantum size effects in TiO₂ thin films grown by atomic layer deposition