Impact of high energy ion irradiation on structural, morphological, optical and photoluminescence properties of MgTiO3 thin films

Negi, Deepak; Shyam, Radhe; Vashishtha, Pargam; Gupta, Govind; Singh, Fouran; Nelamarri, Srinivasa Rao

doi:10.1016/j.jlumin.2022.119051

Cited by 9 publications

(4 citation statements)

References 44 publications

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“…Additionally, it facilitates the determination of essential structural parameters like crystallite phase, crystallite size, lattice parameters…etc. 35 . Figure 3 displays the Rietveld refinement of the XRD pattern of both MT and Li-doped MT samples.…”

Section: Resultsmentioning

confidence: 99%

“…MgTiO 3 demonstrates exceptional characteristics, including a high-quality factor (Q), notable dielectric constant, minimal dielectric loss, low leakage current density, and robust high-temperature stability. These attributes play a pivotal role in advancing the fields of microwave and millimeter wave integrated circuits, global telecommunication technology, integrated optical devices, and dynamic random-access memories 12 .…”

Section: Introductionmentioning

confidence: 99%

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Advancing energy storage and supercapacitor applications through the development of Li+-doped MgTiO3 perovskite nano-ceramics

Magar,

Mansour,

Hammad

2024

Sci Rep

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Perovskite oxide materials, specifically MgTiO3 (MT) and Li-doped MgTiO3 (MTxLi), were synthesized via a sol–gel method and calcination at 800 °C. This study explores the impact of varying Li doping levels (x = 0, 0.01, 0.05, and 0.1) on the crystalline structure and properties of MgTiO3. X-ray diffraction analysis revealed a well-defined rhombohedral MgTiO3 phase. Optical diffuse reflectance measurements provided insights into energy gap values, refractive index, and dielectric constant. Li+ doping enhanced the electrical properties of MgTiO3, with a notable phase transition observed at 50 °C. The study investigated impedance and AC conductivity under varying temperature and frequency conditions (25–120 °C, 4 Hz to 8 MHz). Electrochemical analysis through cyclic voltammetry and electrochemical impedance spectroscopy confirmed highly electrocatalytic properties for MTxLi, particularly when modified onto screen-printed electrodes. This work not only advances the understanding of Li-doped MgTiO3 nanostructures but also highlights their significant potential for direct electrochemical applications, particularly in the realm of energy storage.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Advancing energy storage and supercapacitor applications through the development of Li+-doped MgTiO3 perovskite nano-ceramics

Magar,

Mansour,

Hammad

2024

Sci Rep

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“…One of the effects of irradiation in the present study is the suppression of the PL intensity of TiO 2 nanoparticles with increasing 120 MeV Ag ion fluence (Figure 7). As was evidenced from the XRD and Raman study, PL peak intensity suppression with an increase in 120 MeV Ag ion fluence indicate the onset of disorder with consequent generation of non‐radiative defects due to the deposition of large energy by SHI irradiation 45 . Skinner et al 46 reported that ionized oxygen vacancy level, induced in the energy gap, quickly traps a photo generated conduction band electron, which interacts with a hole in the valence band either radiatively or non‐radiatively.…”

Section: Resultsmentioning

confidence: 95%

“…As was evidenced from the XRD and Raman study, PL peak intensity suppression with an increase in 120 MeV Ag ion fluence indicate the onset of disorder with consequent generation of non-radiative defects due to the deposition of large energy by SHI irradiation. 45 Skinner et al 46 reported…”

Section: Pl Studymentioning

confidence: 99%

Surface modifications of TiO₂ nanostructured materials induced by 120 MeV Ag ions

Tripathy¹,

Rath²,

Mishra

et al. 2023

Surface & Interface Analysis

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The effect of swift heavy ion irradiation on structural, optical, and microstructural properties of TiO2 has been studied. Pellets prepared from TiO2 nanoparticles have been irradiated by 120 MeV Ag ions at different fluences ranging from 5 × 1011 to 1 × 1013 ions cm−2. X‐ray diffraction (XRD), Raman, UV–visible, and photoluminescence (PL) studies indicated anatase phase both in as‐prepared and irradiated pellets. XRD study revealed the crystallite size of the particles as ~16 nm, which is close to the upper limit of the particle size where anatase phase is most stable. Our study thus established the importance of the initial microstructure on the irradiation response of the nanoparticles. Though irradiation did not affect the crystal structure and the polycrystalline nature of the anatase TiO2, it suppressed the crystalline volume fraction. Poisson fitting of the suppression of XRD peak area with irradiation fluence revealed radius of the track of each 120 MeV Ag ion in TiO2 nanoparticles as ~2.1 nm. Irradiation, in addition to creating disorder, darkened the surface of the pellets because of the creation of oxygen vacancies in the TiO6 octahedra. Reorganization of these defects led to suppression of the band gap of TiO2 nanoparticles from 3.19 eV of the pristine sample to 3 eV for samples irradiated beyond a critical fluences 3 × 1012 ions cm−2. The size of the nanoparticles and their agglomeration remained unaffected by irradiation as indicated by field emission scanning electron micrographs.

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Cobalt ion implantation assisted modifications in luminescence, surface states, structural and morphological properties of MgTiO3 thin films

et al. 2023

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Impact of high energy ion irradiation on structural, morphological, optical and photoluminescence properties of MgTiO3 thin films

Cited by 9 publications

References 44 publications

Advancing energy storage and supercapacitor applications through the development of Li+-doped MgTiO3 perovskite nano-ceramics

Advancing energy storage and supercapacitor applications through the development of Li+-doped MgTiO3 perovskite nano-ceramics

Surface modifications of TiO₂ nanostructured materials induced by 120 MeV Ag ions

Cobalt ion implantation assisted modifications in luminescence, surface states, structural and morphological properties of MgTiO3 thin films

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Impact of high energy ion irradiation on structural, morphological, optical and photoluminescence properties of MgTiO3 thin films

Cited by 9 publications

References 44 publications

Advancing energy storage and supercapacitor applications through the development of Li+-doped MgTiO3 perovskite nano-ceramics

Advancing energy storage and supercapacitor applications through the development of Li+-doped MgTiO3 perovskite nano-ceramics

Surface modifications of TiO2 nanostructured materials induced by 120 MeV Ag ions

Cobalt ion implantation assisted modifications in luminescence, surface states, structural and morphological properties of MgTiO3 thin films

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Surface modifications of TiO₂ nanostructured materials induced by 120 MeV Ag ions